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SECTION G
Engineering Guide
System Controls
System Controls
Engineering Guide
Introduction to VAV Terminal Units
ENGINEERING GUIDE - SYSTEM CONTROLS
The control of air temperature in a space
requires that the loads in the space are offset
by some means. Space loads can consist of
exterior loads and/or interior loads. Exterior
loads can consist of people, mechanical
equipment, lighting, com­puters, etc.
In an 'air' conditioning system compensating
for the loads is achieved by introducing
air into the space at a given temperature
and quantity. Since space loads are
always fluctuating the com­pensation to
offset the loads must also be changing in
a corresponding manner. Varying the air
temperature or varying the air volume or a
combination of both in a controlled manner
will offset the space load as required.
The variable air volume terminal unit or VAV
box allows us to vary the air volume into a
room and in certain cases also lets us vary
the air temperature into a room.
The VAV terminal unit may be pressure
dependent or pressure independent. This
is a function of the control package.
Pressure Dependent
A device is said to be pressure dependent
when the flow rate passing through it varies
as the system inlet pressure fluctuates. The
flow rate is dependent only on the inlet
pressure and the damper position of the
terminal unit.
The pressure dependent terminal unit
consists of a damper and a damper actuator
controlled directly by a room thermostat.
The damper is modulated in response to
room temperature only.
Since the air volume varies with inlet
pressure, the room may experience
temperature swings until the thermostat
repositions the damper. Excessive air flow
may also lead to unacceptable noise levels
in the space.
Pressure Independent
A device is said to be pressure indepen­
dent when the flow rate passing through
it is maintained constant regardless of
variations in system inlet pressure.
The pressure independent control is
achieved with the addition of a flow sensor
and flow controller to the VAV box. The
controller maintains a preset volume by
measuring the flow through the inlet and
modulating the damper in response to the
flow signal.The preset volume can be varied
between calibrated limits by the thermostat
output.
Pressure independence assures the proper
distribution of air to the spaces that need
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it. More specifically, it allows you to feel
comfortable that the design limits you have
specified will be maintained. Each pressure
independent terminal unit has minimum
and maximum air flow limits preset at our
factory to conform with the limits specified
in your project drawings. Maximum and
minimum air flow limits are most important
tools for maintaining proper air distribution.
• Maximum air flow limits prevent
overcooling and excess noise in the
occupied space.
• Minimum air flow limits assure that
proper ventilation is maintained.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Engineering Guide
Control Options
There are several control options available
to achieve pressure independent opera­
tion of a VAV terminal unit. Price offers
the following three types of pressure
independent control options.
1) Pneumatic
With this control option the controls are
powered by compressed air, usually
between 15 ‑ 25 psi.
All signals between the controller, thermo­
stat and actuator are via com­pressed air in
the 0 ‑ 25 psi range.
ENGINEERING GUIDE - SYSTEM CONTROLS
The air flow signal is velocity pressure in
the 0 ‑ 1.0 in. w.g. range generated by a
multipoint sensor in the duct inlet.
2) Electronic
Electronic controls are powered by a 24 VAC
power source which is usually a transformer
mounted on the terminal unit.
Signals between the thermostat and
controller are electronic. The damper
actuator is powered either clockwise or
counter‑clockwise in response to a 24 VAC
signal from the controller.
The air flow signal is received via a hot
wire or thermistor type sensor in the inlet
duct or via a velocity pressure signal from
a multipoint sensor which is converted into
an electronic signal by a flow transducer
located on the controller.
3) Direct Digital Control (DDC)
Digital controls are powered by a 24 VAC
power source which is usually a trans­former
mounted on the terminal unit.
Signals between the thermostat and
controller are electronic. The damper
actuator is powered either clockwise or
counter‑clockwise in response to a 24 VAC
signal from the controller.
The air flow signal is received via a hot
wire or thermistor type sensor in the inlet
duct or via a velocity pressure signal from
a multipoint sensor which is converted into
an electronic signal by a flow transducer
located on the controller.
The controller contains a microprocessor
which can be programmed to perform
various control strategies in response to
input signals. The controller is also capable
of communication with local or remote
terminals. Most DDC controllers support
proportional internal (PI) control. This type
of control eliminates off-set errors and will
typically achieve the room setpoint more
quickly and accurately than electronic
controls.
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
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System Controls
Engineering Guide
Controls – Terminology
1. Direct Acting
A device is said to be direct acting when an
increase in input signal results in an increase
in output signal.
ENGINEERING GUIDE - SYSTEM CONTROLS
eg:
Thermostat ‑ output signal in­creases as temperature increases.
Velocity Controller ‑ output signal increases as velocity pressure increases.
2. Reverse Acting
A device is said to be reverse acting when an
increase in input signal results in a decrease
in output signal.
eg: Thermostat ‑ output signal decreases as temperature increases.
Velocity Controller ‑ output signal decreases as input velocity pressure increases.
3. Normally Open
Indicates the fail safe position of the damper
or valve.
4. Normally Closed
Indicates the fail safe position of the damper
or valve.
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All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Engineering Guide
Controls – Terminology
5. Proportional Band
The range of values of the controller variable
over which the output of the controller goes
from fully opened to fully closed at the
controlled device. (aka throttling range)
ENGINEERING GUIDE - SYSTEM CONTROLS
eg: Thermostat-controlled variable
– temperature; output – pressure psi; controlled device – valve
eg: Velocity Controller
- controlled variable – velocity; output
‑ pressure psi; controlled device
- damper
6. Set Point
The desired value of the controlled variable.
eg: Thermostat ‑ temperature set-point
Velocity Controller ‑ flow set-point
7. Control Point
The actual equilibrium value of the controlled
variable.
eg: Thermostat – room temperature
Velocity Controller – supply volume
8. Error Signal
The differential between the set-point and
actual control point.
9. Dead Band
This is a range of the controlled variable over
which the output of the controller does not
change.
eg: Thermostat – A certain value of
temp­er­ature change in degrees is
required to produce a change in output
pressure.
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
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System Controls
Engineering Guide
ENGINEERING GUIDE - SYSTEM CONTROLS
Controls – Terminology
Proportional Control – Represents a
method of control through which the
output signal is proportional to the change
in the input signal (often know as the
error signal). A large change in the input
signal, say a sudden increase in inlet static,
would cause an initial change in the air
flow reading. This would be a large error
between this new reading and the air flow
that the controller is attempting to control
to. This results in a large change in damper
position (output signal) to compensate
for the increase in static. How large the
output signal is depends on a controller
parameter called gain. A gain of 1% a factor
by which the error signal is multiplied by.
This type of control can result in overshoot
or undershoot if the gain is too large or
too small respectively. Another weakness
of Proportional control is that it requires a
significant error signal to create an output
signal. This limits proportional controls to
always have some small margin of error
from the desired condition. This is referred
to as Offset Error. Pneumatic and electronic
controls typically use proportional control,
and have been 'tuned' to ensure that the
proper gain values are used.
Proportional Integral Control (PI) –
This method of control is used to improve
proportional control. It combines both
proportional control with time dependent
integral control. The main difference
between these two methods is how the
controller reacts over time. In proportional
control the controller will remain at a
particular output which is offset from the
desired condition. With Integral control
that offset is eliminated by measuring the
time that the offset exists and creating
an additional output signal based on that
time.The illustration shows how the output
eventually reaches the set-point over time.
The example below will explain in more
detail.
Ex. If a VAV box controller is trying to control
the room temperature of 70 °F but the heat
in the space has made the temperature
rise to 72 °F this would create a demand
for cooling. In this example lets say that
a 2 °F differential creates a change in
the existing air flow of 300 cfm from the
current value of 500 cfm, so the new desired
output would be 800 cfm. To achieve this
the damper position will need to change. In
our Proportional control graph the damper
overshoots the 800 cfm, measures the new
difference, then makes another change to
the output signal. This time it undershoots
the set-point. It makes a third adjustment
and then settles at the offset error output
condition. In our Proportional Integral
graph the overshooting and undershooting
occurs, but over time the damper position
is changed in small increments to reduce
the offset error to zero.
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Proportional Integral Derivative
Control (PID) – This control method
includes both proportional control and
integral control but offers a third level of
control called derivative. The derivative
control is used to anticipate how the error
signal is changing by measuring its rate of
change with respect to time. PID control is
used when lightning fast and precise control
is required. It is not really a necessary option
for HVAC control because the rate at which
the room temperature actually changes is
slow, and this becomes a limiting factor in
the speed at which you can control.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Engineering Guide
Controls - System Examples
Packaged Rooftop Equipment
Packaged rooftop equipment, also known as
rooftop units, is very common in industrial
and commercial buildings. These units
typically range from 5 to 50 tons for most
small to medium systems. The units supply
cooling and/or heating via stages. Smaller
units (such as a 5 ton) may only have one
stage of cooling and heating while larger
units will have multiple stages of heating
and cooling. Multiple stages allow the unit
to deliver the appropriate amount of cooling
and heating to the space.
Control System
ENGINEERING GUIDE - SYSTEM CONTROLS
Larger rooftop units (10 ton and above) have
large capacities and proper sizing of the unit
is critical. An oversized rooftop system will
not provide a 'safety' factor; more likely an
oversized system will suffer from frozen/
iced up cooling coils, tripping safeties on the
heater side and noise in the occupied space
due to excessive air pressure. These issues
are difficult to correct on site and consume
capital that could be used elsewhere in the
project.
Variable Air Volume (VAV) Zones
Pressure independent VAV zones result in
much better control of zones versus pressure
dependent zones. Pressure independent
zones have set minimum and maximum air
flows. This ensures that each zone meets its
minimum air flow requirements and also
ensures overshoot does not occur due to
constant air flow monitoring and control.
This results in more comfortable zones
for the occupant. Pressure dependent
zones are subject to changes in duct static
pressure, making duct static pressure even
more critical.
Standalone Rooftop Controller / System
A standalone rooftop controller will control
packaged rooftop equipment based on
a local temperature sensor and local setpoint control. No networking or remote
information is available in this system.
Typically most rooftop controllers have a real
time clock (RTC) which allows scheduling.
Scheduling allows energy savings during
unoccupied periods. Most standalone
rooftop controllers are very similar to
residential type thermostats, however,
commercial and industrial building rooftop
units typically have multiple stages of
heating and cooling. For example a typical
10 ton rooftop unit will have two stages
of heating (either gas or electric) and two
stages of cooling.The multiple stages allow
for better control. Typically the rooftop fan
will run continuously during occupied
periods to maintain fresh air requirements
in the space. Fresh air is drawn in and mixed
with the return air. The fresh air damper
is typically fixed in a hard set position.
However more advanced systems can
module the fresh air intake based on internal
carbon dioxide (CO2) levels. This type of
© Copyright Price Industries Limited 2014.
control can save energy since unnecessarily
conditioning outside air places extra load on
the entire system.
Bringing in excessive outside air will
pressurize the building. While this is desirable
in certain situations excessive pressure
can cause issues such as air dumping from
return air inlets, doors not closing properly
and many other factors. To deal with this
issue many packaged rooftop units have an
option of a pressure relief damper that will
handle the excessive pressure. This relief
damper is typically mechanical. For larger
systems with excessive pressure problems
a powered exhaust fan may be used with
a differential pressure switch. This type of
solution is usually not a standard option on
packaged rooftop equipment.
level of VAV control. For example if the
rooftop controller is located in a closedoff unoccupied area, overcooling and/or
heating of all zones is likely.
While the VAV zone controllers will
modulate to control the air flow and try to
maintain their room set-points, the zones
will eventually overcool or overheat due to
the required minimum air flow settings in
the zones.To solve these issues a networked
rooftop controller can be implemented.
The mode of the rooftop unit is decided by
the rooftop controller based on local room
temperature and set-point. Therefore the
location of the rooftop controller is critical.
Poor location choice will result in several
uncomfortable zones regardless of their
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
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System Controls
Engineering Guide
Controls – System Examples
Networked Rooftop Controller / System
A networked rooftop controller is a much
more powerful controller than a standalone
unit, since it needs to gather information
from the network and calculate load
demands. Due to it being a more powerful
controller other features are typically added.
Control System
ENGINEERING GUIDE - SYSTEM CONTROLS
Discharge Air Temperature Control
One common feature on networked rooftop
controllers is discharge air temperature
limiting and control.This allows temperature
sensors in the discharge ductwork to monitor
the output of the packaged rooftop unit. If
the temperature is too low or too high it can
shut down stages of cooling or heating.This
is important to prevent damage to the unit
and prevent safeties (such as high limits)
from tripping and taking the unit offline. A
common problem with packaged rooftop
equipment is ice building up on the cooling
coils.This ice build-up prevents air flow and
then causes even more ice to accumulate.
Eventually almost no air can flow and it is
possible to even damage (or stress) the
cooling coils. Monitoring the discharge
air temperature in real time and shutting
down stages of cooling can prevent this
from occurring.
Outside Air Temperature Monitoring
A rooftop controller using an outside air
temperature probe can lockout heating
or cooling based on the outside air
temperature. This feature allows energy
savings and can prevent the unit from
cycling between heating and cooling modes
unnecessarily. Typically when equipment
is oversized the risk of heat/cool cycling
increases. This oscillation between modes
makes occupants uncomfortable and
wastes energy. Locking out cooling during
the winter and heating during the summer
can prevent this. However the temperature
limits must be carefully chosen to not lock
out cooling or heating when it may actually
be required.
CONTROL TIP
When rooftop equipment is oversized
the risk of heat/cool cycling increases.
This results in uncomfortable
occupants and wastes energy. Also
the risk of icing up cooling coils and
tripping heater safeties increases.
Real Time Clock and Calendar
Networked rooftop controllers typically
have a real time clock (RTC) which allows
scheduling and energy savings. Some
rooftop controllers offer additional features
such as a real time clock/calendar (RTCC)
which also allows users to program
unoccupied periods during holidays such
as Christmas, New Year’s Day and others.
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Polling Data from Network
A networked rooftop controller will control
the packaged rooftop unit based on data
collected from each zone. The network
protocol type is not critical if the system
is not connected to a central building
automation system (BAS). However, if it is
part of a larger system the protocol should
be an open protocol such as BACnet. BACnet
allows devices from different manufacturers
to share data.This can result in better control
and allows building owners to add on to the
existing BAS network. The room load data
collected is typically room temperature and
room set-point.This data allows the rooftop
controller to determine the best mode to
operate in rather than just using its local
temperature sensor. This allows for much
more intelligent control of the packaged
rooftop unit and also allows the installer to
locate the rooftop controller in any location
since it is gathering information from the
zones and not locally.
Once the rooftop controller collects the data
from the zones a strategy can be used to
properly control the packaged rooftop unit.
Several strategies can be created and used
to suite a variety of situations.
Voting Strategies - Simple Polling
One of the most common strategies is a
simple voting strategy that is typically used
where each zone gets one vote for cooling,
heating or neutral. It is possible and very
likely zones will have different loads. Some
may need cooling while others need heating
regardless of outside air temperature. Once
the votes are calculated the rooftop unit is
put into one of the modes. This strategy
gives each zone a single vote which is good
for most systems with similar sized zones.
This type of strategy however should not be
used if certain zones are much larger, or if
the system needs to favor heating or cooling
modes. One issue with voting strategies is
when the votes are 50% cooling and 50%
heating. When the system is 'on edge' it
can result in cycling between heating and
cooling modes.To prevent this an outside air
temperature probe with a lockout sequence
may be necessary.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Engineering Guide
Controls - System Examples
The weighted polling strategy is typically
used where each zone gets one vote for
cooling, heating or neutral, however, certain
zones may get more than one vote. For
example a large training or meeting room
may require more votes to ensure comfort
for many people versus individual offices.
This strategy helps satisfy larger or very
important areas (such as a president’s office).
The important area is assigned a multiplier
such as 2x which gives the area two votes
towards either cooling, heating or neutral.
This extra voting power will ensure the zone
is kept comfortable, while also allowing the
lower priority zones a vote as well.
© Copyright Price Industries Limited 2014.
Voting Strategy with weighted polling
ENGINEERING GUIDE - SYSTEM CONTROLS
Voting Strategies – Weighted Polling
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
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System Controls
Engineering Guide
Controls – System Examples
Voting Strategies – Non-Majority
Polling
Voting strategy with 1:1 polling
ENGINEERING GUIDE - SYSTEM CONTROLS
A non-majority polling strategy is used when
the system needs to favor either the cooling
or heating modes. In this case any arbitrary
number can be used such as 30% cooling.
So if 30% of the zones require cooling, the
rooftop unit would enter cooling mode
much sooner than waiting to win the vote
completely. This is useful for a system that
has a large solar load and needs to favor
cooling more often than heating.
G-12
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Engineering Guide
Controls – Terminology
Software Package –The software package
typically is installed on a computer that is
on the network, and is design to interpret all
the data from the controllers and display it
for the end user in a coherent manner. Often
the software package will have a graphical
interface option.
Graphical Interface – Is simply an interface
with the software package that allows the
user a cleaner and simpler way of viewing
the data transferred to the networked
computer.
System Network
Connection
to PC
ENGINEERING GUIDE - SYSTEM CONTROLS
Network – A network is a system of control
in which each controller is physically
connected (in our case through a daisy chain
connection) and is able to communicate its
local data (such as air flow, temperature setpoint etc.) throughout the entire network.
The information can be viewed by using a
'software package'. The software package
is installed on a computer which is on the
network. This is often referred as the point
of control.
Bacnet
Router
SDV
SDV
SDV
B.A.S. (Building Automation System) –
A B.A.S. is a signal that has the capabilities
of controlling numerous controllers in one
building. Such as: equipment control or
system wide temperature setting.
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
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System Controls
Engineering Guide
Static Pressure Control
ENGINEERING GUIDE - SYSTEM CONTROLS
Static pressure control is critical to proper
system operation. Excessive static pressure
in the ductwork can cause excessive noise
in the occupied zones. In VAV systems static
pressure must be controlled via a bypass
duct and/or using a Variable Frequency
Driver on the rooftop unit or air handler.
Bypass valve unit with DDC controller
In the previous system examples, pressure
control is shown with a bypass damper
duct from the supply to the return. This will
help the system maintain its designed static
pressure. The ducted bypass however can
cause the packaged rooftop equipment to ice
up or overheat if too much air is bypassed.
This can be solved by using discharge air
temperature sensors to limit excessive
cooling or heating temperatures in the duct.
Bypass control can also be non-ducted,
where the excess air is dumped into
the plenum space. This will prevent the
packaged rooftop unit from icing up or
overheating in certain cases. However, if
the plenum becomes over pressurized it
can cause problems with air dumping out
of return grilles and excessive pressure can
damage ceiling tiles. To solve this issue an
exhaust fan must be used in the plenum
space.
Another way to manage static pressure in the
system is to use a packaged rooftop system
with a built-in variable frequency drive
(VFD). The VFD will ramp down the main
fan by modulating the frequency at which
the fan motor is run. This system can save
energy during low system demand since the
fan speed has been reduced. If the fan speed
is reduced too much, however, the cooling
coils may ice up and the high limit safeties
may trip during heating modes. Because of
this, a VFD system may still need a bypass
designed into the system to prevent issues
during low volume air requirements.
G-14
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Engineering Guide
Building Automation System Network
A building automation system BAS (also
referred to as an intelligent building system)
is a computerized, intelligent network of
devices that control and monitor the HVAC
system. The building automation system
can also control other systems such as
lighting, security and fire alarms.
Building Automation Network
ENGINEERING GUIDE - SYSTEM CONTROLS
In a building automation system this
allows energy savings through intelligent
monitoring, control and shutdown of
devices. Also building management is much
easier with a networked BAS system since
most (if not all) devices can be monitored
and controlled through a PC workstation or
over the internet.
What makes the building automation
system possible is the network. A network
allows devices to share information and
communicate with each other. Once the
network is in place all devices on the
network must communicate using the
same language. This language is the
communications protocol of the network.
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
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System Controls
Engineering Guide
Building Automation System Network
Communications Protocol
Communication protocols for building
automation systems have features intended
to ensure reliable interchange of data over
a communication channel. Communication
protocols are basically certain rules that are
followed to ensure a system works properly.
Communication protocols have to handle
several factors such as bad data, bad timing,
and address collisions to name a few.
Multiple Floors networked to a single Front End Workstation.
ENGINEERING GUIDE - SYSTEM CONTROLS
Proprietary Communications Protocol
In order for devices to share data they
must speak the same language. Over
the years several companies have
developed proprietary protocols in their
DDC controls. These proprietary protocols
allow the controllers to share information
with each other; however other vendors
that do not speak the same language
cannot share information or even exist
on the same network wires. This requires
multiple networks to be run and multiple
PC workstations to monitor and control
the networks. Also different networks
cannot share information with each other
if they do not speak the same language.
Since its unlikely a single vendor can
provide absolutely every piece of building
automation equipment this proprietary
scheme has massive disadvantages
especially for the building owner.
For example vendor A, vendor B and vendor
C are all installed in a commercial office
building. Each controller is controlling
their area however vendor A and vendor B
need to know the outside air temperature.
Vendor C knows the outside air temperature,
but cannot share that information due to
speaking a different language. Therefore
more outside air temperature probes
must be installed and configured for each
vendor. This increases costs and prevents
the sharing of information.
Open Protocol
To allow multi-vendor networks to properly
share data an open communications
protocol must be used. Today in building
automation nearly all proprietary schemes
have been discontinued and all new systems
are designed using open protocols.
The two protocols typically used for building
automation are BACnet and LonWorks.
BACnet is an open standard developed by
ASHRAE and can be implemented by anyone
using any hardware type, while Lonworks
was developed by Echelon Coroporation
and while open requires the use of their
hardware/software packages.
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All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Engineering Guide
BACnet - Building Automation and Control Network
Price like many others has implemented
BACnet on their DDC controls. The BACnet
ASHRAE standard is truly open and hundreds
of manufactures have implemented BACnet
in their controls.
BACnet device tree
Several key factors were considered
as the standard was developed such
as: Interoperability, Low Overhead,
Compatibility with other applications and
networks, layered OSI model network,
flexibility, cost effectiveness, transmission
reliability, priority arrays, and stability under
realistic loads. BACnet ends the frustration of
proprietary systems, increases competition
increases building owner choices.
Due to the careful development of the
standard BACnet it has evolved into a
very popular and robust communication
protocol.
BACnet Server and BACnet Client
Devices
BACnet Operator Workstation (B-OWS)
BACnet is based on the client-server
model. BACnet messages are called
service requests. A client device sends a
service request to a server device that then
performs the service and reports the results
to the client device.
The B-OWS is the operator’s window into a
BACnet system. While it is primarily used for
the operation of a system, it may be used
for configuration activities that are beyond
the scope of this standard. It is not intended
to perform direct digital control.
Therefore it is important to realize a
BACnet server cannot request information
from other devices, it can only provide
information to a client. Typically VAV
terminal unit controllers are BACnet server
devices. A BACnet client device usually
handles data coming from several server
devices. An example of a client device
would be a networked rooftop controller
that polls zones for room load data.
BACnet Building Controller (B-BC)
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A B-BC is a general-purpose, fieldprogrammable device capable of carrying
out a variety of building automation and
control tasks. Field programmable devices
can be loaded with custom programs to
perform virtually any function. However
they are typically more costly due to the
extra hardware and firmware requirements.
BACnet Advanced Application
Controller (B-AAC)
A B-AAC is a control device with limited
resources relative to a B-BC. It may be
intended for specific applications and
supports some degree of programmability.
BACnet Application Specific
Controller (B-ASC)
A B-ASC is a controller with limited
resources relative to a B-AAC. It is intended
for use in a specific application and
supports limited programmability. This type
of controller is typically used on VAV boxes
to support a variety of specific functions
such as pre-defined sequences. While the
programmability is limited this also reduces
the cost and complexity of the controller.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-17
ENGINEERING GUIDE - SYSTEM CONTROLS
ASHRAE began working on the BACnet
standard in 1987 as building automation
systems and networking became very
popular.
System Controls
Engineering Guide
Building Automation System Network
ENGINEERING GUIDE - SYSTEM CONTROLS
BACnet Vendor ID
Each BACnet device requires a vendor ID.
This unique number identifies the Vendor of
the BACnet device. Also the BACnet vendor
ID allows a device to send non-standard
(proprietary) messages that are unique to
that vendor. This allows a BACnet device
to still operate on a BACnet network while
sharing proprietary information with other
controllers. This proprietary information
will be ignored by other controllers. At
print of this document of 400 BACnet vendor
ID’s have been officially issued by ASHRAE
SSPC 135.
PICS - Protocol Implementation
Conformance Statement
A PICS statement tells the user/installer
all capabilities of a BACnet device. Every
BACnet device is required to have a PICS
statement. The PICs statement contains
an overview of the product, details of the
products BACnet capabilities, LAN options
(such as MS/TP, Ethernet, IP, etc) and other
possibly special features of the controller.
BACnet Services
The BACnet protocol defines a number
of services that are used to manage
communication between devices. The
protocol services for handling object
discovery currently include:
BACnet Testing Laboratories (BTL)
BACnet testing Laboratories (BTL) was established by BACnet international to
support compliance testing and interoperability testing activities. BTL provides
testing services through its managed BACnet laboratory. When a product passes
the rigorous testing it will be awarded a BTL tested mark. Similar to a UL or ETL
mark it assures the end user the product has been tested to comply with all current
standards. However the BTL testing is focusing on interoperability with other devices
and conformance to the BACnet standard rather than electrical safety.
BTL also organizes an annual BACnet international sponsored interoperability
workshop. This workshop allows vendors from all over the world to participate in
connecting all their devices into a common BACnet network. This real world testing
ensures true interoperability between multiple vendors.
Who-Is, I-Am, Who-Has, I-Have
When devices need to share/exchange data
services such as: Read Property and Write
Property are used.
G-18
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Engineering Guide
Building Automation System Network
There are several BACnet objects that
devices can support. However each and
every BACnet device needs at least one
Device object. Objects may represent single
physical points which perform a specific
function (like an analog output - AO). Objects
can also represent non-physical items like
program variables (analog variables - AV),
scheduling and trend log data. Each BACnet
object has a listing of properties that have
more detailed information about the nature
of the object. Each BACnet object has some
mandatory properties and some optional
properties. Optional properties are not
needed for BACnet compliance and can
be implemented at the manufacturer’s
discretion.
The BACnet standard currently supports 25
object types.
• Accumulator – energy tracking
• Analog Input – sensor input such as a
thermistor
• Analog Output – control output such as
0-10VDC valve
• Analog Value – Setpoint or analog
control system parameter
• Averaging – average value such as
average power usage
• Binary Input – on/off input – such as
contact closure from a relay
• Binary Output – on/off output – such as a
single stage fan
• Binary Value – control value such as an
override status
• Calendar – used for specifying holidays
• Command
• Device (mandatory object) – required for
every BACnet device
• Event Enrollment
• File
• Group
• Life Safety Point
• Life Safety Zone
• Loop
• Multi-State Input
• Multi-State Output
• Multi-State Value
• Notification Class
• Program – custom control program
• Pulse Converter – takes data and scales it
• Schedule – for setting up day/night
schedules
• Trend Log – used for data collection
from the BACnet network
© Copyright Price Industries Limited 2014.
BACnet Priority Array for Commandable Objects
Priority Level
Application
1
Manual-Life Safety
2
Automatic-Life Safety
3
Available
4
Available
5
Critical Equipment Control
6
Minimum On/Off
7
Available
8
Manual Operator
9
Available
10
Available
11
Available
12
Available
13
Available
14
Available
15
Available
16
Available
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
ENGINEERING GUIDE - SYSTEM CONTROLS
BACnet Objects
G-19
System Controls
Engineering Guide
BACnet - Building Automation and Control Network
Device Object
The device object contains information about
the controller such as model name, vendor
name, firmware and software revision. It
can also include other information such
as network interactions (max master, retry
limit, etc) for the device. Also included is an
array of object types supported by the device
such as Analog input, Analog variable, etc.
The device object is mandatory and each
BACnet device must contain this object.
AI - Analog Input. For Example, a 10k thermistor for temperature
measurement
ENGINEERING GUIDE - SYSTEM CONTROLS
Commonly Used Objects
When devices are networked using
BACnet the most commonly used objects
are typically analog inputs (reading in
temperatures and air flow transducers),
analog variables (used for setting variables
in controllers, i.e.: air flow limits, sequence
of operations setup). Some variables
(optionally) support being overridden. This
allows the user to override the object and
force a manual valve. For example to test a
controller it may be helpful to override the
room temperature via the network. This is
called a commandable BACnet object. Any
commandable BACnet object must support
and implement a priority array. Since the
object could be written to from multiple
sources it’s important to have priority, since
life safety would take priority over a time
delay.
AV - Analog Variable. For example, a software value in a controller such
as damper runtime
BO - Binary Output. For example, a BO would control a 24 VAC relay
G-20
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Engineering Guide
BACnet - Building Automation and Control Network
Properties
The properties in a BACnet device are
determined by the type of object and what
the manufactures chooses to implement.
Properties let other BACnet devices read
information about the object containing
the property. Properties can contain
information such as object name, value,
units and several others.
Ethernet Switch
A router is used to join two computers or
devices together over an electronic link. The
link can be a physical wire, the internet or
even a radio (wireless) signal.
A BACnet router is typically used to join
BACNet LANs together. The most common
type is an Ethernet to MS/TP BACnet router.
This type of router joins a low speed MS/
TP network of devices to a higher speed
Ethernet network. This allows a long trunk
of MS/TP devices (such as VAV terminal
unit controllers) to interface with the main
building automation system. One benefit of
a BACnet router using Ethernet is that it can
utilize the existing Ethernet infrastructure
typically already available in the building.
This can reduce installation costs in most
situations. Also most building Ethernets are
running at 100MBs or 1GBs. This allows for
large bandwidth of data and since BACnet
devices are typically only using a small
percentage of this they do not have any real
load on the Ethernet network. One thing to
remember is the BACnet router requires a
unique DEVICE instance and unique MS/TP
MAC address.
Software Address 101
Hardware Address 1
ENGINEERING GUIDE - SYSTEM CONTROLS
Routers and Gateways
BACnet Router- MS/TP to Ethernet
BACnet MS/TP device (Price
Intelligent Controller -PIC)
Software Address 201
Hardware Address 1
BACnet Router- MS/TP to Ethernet
BACnet MS/TP device (Price
Intelligent Controller -PIC)
Software Address 301
Hardware Address 1
BACnet Router- MS/TP to Ethernet
BACnet MS/TP device (Price
Intelligent Controller -PIC)
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-21
System Controls
Engineering Guide
Building Automation System Network
Network Layers
Almost every network being used today
built upon the Open System Interconnection
(OSI) standard. OSI was developed in the
early 1980’s and is an ISO (International
Organization for Standardization). The
standard defines a set of seven layers that
define how data travels across the network.
Several Layers of OSI - The BACnet standard uses 4 of these
At each layer data is packaged/prepared for
the next stage. There are a total of 7 layers,
which are broken in two sets Application
and Transport.
ENGINEERING GUIDE - SYSTEM CONTROLS
Application Set
Layer 7: Application – This layer interfaces
with the operating system or whenever the
user or a device moves data on the network.
Layer 6: Presentation – This layer takes data
from the Application layer and converts it
into a standard format for lower layers.
Layer 5: Session – Layer 5 begins, maintains
and terminates communication with the
receiving device.
Transport Set
Layer 4:Transport –This layer maintains the
flow of data and provides verification such
as error checking and data recovery between
devices. The transport layer also takes data
from multiple applications and integrates it
into a single stream on the physical network.
Layer 3: Network – Layer 3 defines how
the data will be sent to the receiver device.
Addressing, Protocols and Routing are
handled by this layer.
Layer 2: Data – This layer the physical
protocol is assigned to the data and the
packet sequence is also defined.
Layer 1: Physical – Layer 1 defines the
actual hardware used on the network. It
defines all physical characteristics of the
communication network such as voltage
levels and timings.
The OSI reference model is a guideline
to handle almost any network task/type.
Several protocols will combine or eliminate
layer that are not required specifically for
their application. The BACnet protocol
uses a reduce OSI set with only four
layers to simplify implementation of the
standard. Basing the BACnet protocol on
the OSI model is important since it allows
modularity and division of function, which
results in smaller more manageable tasks.
G-22
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Engineering Guide
BACnet Layers
The BACnet protocol uses four of the
OSI layers: Physical, data link, network
and application.
BACnet Layers
Equivalent OSI Layers
BACnet Application Layer
Application
BACnet Network Layer
Network
ISO 8802-3
(IEEE 802.3)
ARCNET
MS/TP
PTP
Data Link
LonTalk
EIA- 485
EIA- 232
Physical
ENGINEERING GUIDE - SYSTEM CONTROLS
ISO 8802-2
(IEEE 802.2) Type 1
Physical and Data Link Layers
BACnet has several options for the physical
and data link layers. The physical layer can
be EIA-485 (typically referred to as RS-485),
EIA-232 (typically referred to as RS-232),
Lontalk, ARCNET and IEEE 802.3 (typically
referred to as Ethernet). The most common
physical layers in use today are EIA-485
and Ethernet. While EIA-485 offers long
distance runs of (ideally) up to 4000 ft (1200
m), its data throughput is much lower than
Ethernet. The maximum specified data rate
is 100 kbs at 4000 ft (1200 m). However even
with its lower bandwidth EIA-485 offers
excellent electrical noise immunity which
is required in industrial buildings. It is also
worth noting that the Modbus standard
(which is popular in industrial automation
such as manufacturing) also uses EIA-485
for its physical layer.
Data signals being sent over RS-485
Standard Ethernet Cable (RJ 45)
EIA-485 Signal
EIA-485 networks can handle up to 32 full
load devices, however most new drivers are
¼ load and therefore multi drop networks
can be increased to a maximum of 128
devices. However there are several real
world requirements that limit the maximum
network size to much less than 128 devices.
Network Layer
The BACnet protocol simplifies routing
issues by declaring there is only one path
between any two active devices in the
network.
Application layer
The application layer provides applications
access to the BACnet data types.
BACnet networking
The BACnet network can exist over several
different types of physical media. The
network can exist over several different
kinds of media such as twisted-pair copper
(like CAT5 wire), coaxial cable, optical
fiber, power lines and various wireless
technologies. Each of these media types has
several tradeoffs in cost and performance.
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-23
System Controls
Engineering Guide
Building Automation System Network
The most popular BACnet networks types
are described below.
DDC Controller using MS/TP connected to BACnet router
BACnet over IP
ENGINEERING GUIDE - SYSTEM CONTROLS
Ethernet is commonly used in almost all
commercial buildings for network access.
This works well as a building wide network,
but cannot span long distance such as cross
country. Therefore multiple networks must
be created and then joined together using a
different technology and protocol.
For multiple networks to communicate there
must be a common language or protocol
used by the devices on the network. That
language is Internet Protocol (IP). IP is used
for virtually all internet communication.
Currently Internet Protocol Version 4 (IPv4)
is still the most popular protocol of the
internet, however Internet Protocol Version
6 (IPv6) is becoming more common as the
addresses for IPv4 are eventually exhausted.
BACnet IP allows users to create very large
networks across the IP (internet) network.
Bacnet router
Bacnet ms/tp network
Price BACnet Module Blue terminal block supports hardwiring of MS/TP
network A, B and Ground
CONTROL TIP
IP Version 4 addresses are limited
to 32-bit which allows a maximum
of 4,294,967,296 possible unique
addresses. (example IPv4 address:
192.168.0.74)
IP Version 6 addresses which are 128bit, can go much higher. There are over
3.4×1038 possible unique addresses.
BACnet over Ethernet
Typically physical media like twisted-pair
copper (CAT5E/CAT6) offer fast and robust
networks. This is a main factor in Ethernets
popularity in virtually all commercial
buildings. The communication layer used
typically used on CAT5E/CAT6 cable is called
Ethernet.
Ethernet has evolved greatly since its main
introduction in the 1980s. Today typically
Ethernet networks run at fast speeds of
100Mbit/s (100 million bits per second)
or 1Gbit/s (1 billion bits per second). This allows for fast data transfers and
monitoring. With so much bandwidth on
most Ethernet networks it’s possible to
use them for Office networks and Building
Automation Networks.
The advantage of using the building existing
Ethernet network is that it is most likely
already installed and run throughout the
building. This reduces wiring cost since a
completely new network does not have to
be run for the building automation system.
However with most DDC devices they do
not directly support Ethernet connectivity.
These DDC devices typically run on a subnetwork that runs at slower speeds. With
G-24
most networked devices slower speeds
mean lower costs. Also Ethernet over
unshielded twisted pair (UTP) has some
physical limitations of only being able to
run a maximum of 330 ft (100 meters) before
requiring a repeater or switch.
BACnet over RS-485 (MS/TP)
BACnet can also run over RS- 485 network
using master slave/token passing (MS/TP).
This is a twisted-pair local area network (LAN)
operating at speeds from 9.6 kb per second
to 76.8 kb per second. This type of LAN is
lower-cost than Ethernet and is very well
suited to VAV controllers and other HVAC
equipment. Master slave token passing
requires one low capacitance twisted-pair
wire for networked communication plus
a ground. The connections are typically
labeled A, B and ground. The entire MS/
TP network must be wired in daisy chain
format. Wiring in daisy chain format
prevents reflections on the network and
results in increased reliability.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Engineering Guide
BACnet - Building Automation and Control Network
BACnet MS/TP Addressing
BACnet devices require a unique address to
function on a network. Each BACnet device
has a hardware address and a software
address.
Addressing Scheme for each floor and area
MS/TP NETWORK RUN IN DAISY CHAIN FORMAT
Before adding to or creating a BACnet
network some items must be considered:
MAC adress 1
MAC adress 2
MAC adress 3
ENGINEERING GUIDE - SYSTEM CONTROLS
1. Network type
2.Network speed
3.Number of devices
4.Addressing scheme
5.Working with existing devices/networks
6.Terminating
7. Wire type
1. Network Type –
The network type using BACnet on lower
level devices is typically MS/TP (Master
Slave Token Passing). MS/TP allows for
several devices to operating on a single
network segment. MS/TP has benefits such
as being lower cost and less demanding on
controllers than Ethernet. MS/TP uses the
EIA-485 signaling standard. This is a robust
standard that uses one twisted pair with a
ground to transfer data.
Dip switch for setting MAC address
2.Network Speed –
All devices running together on a network
segment must be using the same speed also
known as baud rate. The BACnet standard
current allows devices to use four speeds.
These are:
a.9600
b.19200
c.38400
d.76800 – (Price factory default speed)
On communication networks higher speeds
have will of course have faster performance,
however higher speed networks are more
sensitive to electrical noise and poor
installation practices. Therefore if a BACnet
network seems unreliable one solution is to
drop the BACnet MS/TP speed to a lower
rate. This can help the network perform
better. However if the network is unreliable
there is probably another issue such as
duplicate addresses, incorrect baud rate
or crossed 24 VAC hot and common power
supplies.
3.Number of devices On a MS/TP network the maximum number
up devices is technically up to 127. However
due to system noise, grounding and general
EMI interface this is not a practical number
for the real world. Price recommends
keeping MS/TP networks to 30 devices or
less. This recommendation allows for fast
and stable networks that are much easier to
troubleshoot. Also remember if a BACnet
device on the MS/TP network goes down
and clamps/shorts the network it will take
down the entire segment. A large segment
will also be very difficult to troubleshoot.
© Copyright Price Industries Limited 2014.
Dip Switch ON
Value
1
1
2
2
3
4
4
8
5
16
6
32
7
64
8
128
Notes
Price uses DIP switch 8 for enabling R/C termination of the MS/TP network
CONTROL TIP
When networking BACnet devices
never use a bus or star network. This
will result in an unreliable network and
will be very difficult to troubleshoot.
Ensure the entire network is run in a
daisy chain format.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-25
System Controls
Engineering Guide
ENGINEERING GUIDE - SYSTEM CONTROLS
BACnet - Building Automation and Control Network
4.Addressing Scheme –
Addressing is very important with BACnet
especially if you are building the foundation
for a larger network. There are two types
of addresses used with BACnet. The base
level address is the MAC address, which
is the physical network address. The MAC
must be unique on the network segment.
While the MAC can technically go from
0-127, Price recommends limited the MAC
address from 1 – 99. This allows special
devices (such as routers) to use MAC 0 and
not exceeding 99 allows an elegant network
scheme. The second type of address is the
device instance. This is the software address
for BACnet and of course allows BACnet to
support more that 127 devices in a building/
campus. The device instance is typically
added to the BACnet MAC address has a
range from 1 – 4,194,303. This allows for
the creation of very large networks. Price
recommends a logical addressing scheme.
For example once the MAC addresses (DIP
switches) have been assigned add 10,000
(device instance) to all devices on the first
floor. Then add 20,000 to all devices on the
second floor and so on. For different areas/
building use other device instances such as
15,000 (first floor – expansion) and so on.
Also ensure that any existing addressing
scheme is followed.
G-26
Addressing Scheme for each floor and area
Floor 4
Floor 3
Floor 2
Floor 1
40200
40100
30200
30100
20200
20100
10200
10100
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Engineering Guide
BACnet - Building Automation and Control Network
6.Terminating –
MS/TP networks can be terminated
using a resistor and/or resistor capacitor
(RC). The intent of the terminating is to
reduce network reflections/noise. Price
recommends terminating MS/TP networks
once at the beginning and once at the end of
the network. It is important to only terminate
the network segment a total of two times.
Multiple termination can drag down network
signals and can create the problems you are
trying to avoid. If termination is needed DIP
switch number 8 (TRM) on Price Controllers
with BACnet module will enable an R/C
across the network (A/B).
Each DDC Controller needs a unique Hardware or MAC address
BACnet Router- MS/TP to Ethernet
Hardware adress 1
Hardware adress 4
© Copyright Price Industries Limited 2014.
Hardware adress 2
Hardware adress 5
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
Hardware adress 3
ENGINEERING GUIDE - SYSTEM CONTROLS
5.
Working with existing devices/
networks –
If a BACnet network already exists in the
building ensure any new devices get a
unique MAC addresses on their network
segment. Therefore you must know exactly
what is already on the network and what
(if any) addresses are free. Also you must
ensure the devices added to an existing
network segment are running at the same
speed. If you add a new device at a different
BAUD rate it will crash the network.
Hardware adress 6
G-27
System Controls
Engineering Guide
BACnet - Building Automation and Control Network
ENGINEERING GUIDE - SYSTEM CONTROLS
7. Wire Type –
The MS/TP network requires good quality,
low capacitance network wire to ensure
reliable data communications. Therefore
you cannot use standard 'thermostat
wire' for network wiring. Price supplies a
35 ft plenum rated CAT5 cable with each
Controller with BACnet option. CAT5 cable is
an excellent choice for MS/TP networks due
to its low cost and excellent performance.
Also it is very popular and available to most
installers.
PRODUCT TIP
BACnet MS/TP Checklist

Unique Hardware Address (for
network segment) for EACH device

Unique Software Address (for
entire BACnet network)
 All Devices running at same speed
(Price default is 76,800 baud)
 Network wiring is CAT5 or better
Wiring is done in a daisy chain
format
24 VAC HOT and COMMON is
consistent and COMMON is earth
grounded
Accessing DDC controller from PC workstation
Ethernet Switch
Workstation with BACnet front end software
Hardware adress 1
BACnet Router- MS/TP to Ethernet
BACnet MS/TP device (Price
Intelligent Controller -PIC)
Accessing BACnet devices remotely
via PC Workstation
Using a PC with BACnet front end software
you can monitor and control BACnet devices
on the network. The PC can connect to the
exisiting building ethernet network. Then in
another location the BACnet router is also
connected to the building ethernet network.
The front end sofware can then discover
all devices on the MS/TP sub network. The
entire BACnet network can be monitored
and controlled. Using Virtual Network
Computing (VNC) also known as desktop
sharing you can remotely monitor and
control the BACnet devices. Most front end
software also has features such as alarming,
trending and email to notifiy users of critical
changes in the system.
G-28
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Engineering Guide
BACnet - Building Automation and Control Network
Accessing BACnet devices remotely
via the Internet
Accessing your system via the internet allows
world wide access to the building for fast
and easier monitoring and troubleshooting.
In order to access a building automation
system via the internet several things must
be setup and configured.
PC workstation accessing building automation system
(BAS) via the internet
The main firewall also known as router
for the LAN will need to be setup to
accept incoming connections. Most routers
have all incoming ports locked down for
security reasons.
ENGINEERING GUIDE - SYSTEM CONTROLS
It is important to have a static external IP
address when using remote access. A static
IP will not change while a dynamic IP will
change at random intervals. If the dynamic
IP address changes, the old address will not
work, thereby denying you access to the
system. Your Internet Service Provider (ISP)
can provide your external IP address. Also
you can use certain web sites to determine
your current external IP address such as:
www.whatismyip.com.
Most residential quality internet plans
do not offer a static IP address and only
offer dynamic IP. This makes accessing
equipment difficult if the IP address must
constantly be updated. One work around
is to use a dynamic DDNS service.
CONTROL TIP
External IP addresses are accessible
via the internet and are globally
unique. Internal IP addresses are only
accessible inside the firewall (building)
and are unique to that network.
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-29
System Controls
Engineering Guide
References
ASHRAE (2006). Humidity control design guide. Atlanta, GA: American Society of Heating, Refrigerating and
Air-conditioning Engineers.
ASHRAE (2007a). ASHRAE handbook—HVAC applications. Atlanta, GA: American Society of Heating,
Refrigeration and Air-Conditioning Engineers, Inc.
ASHRAE (2007b). Standard 135.1-2007—Method of test for conformance to BACnet. Atlanta, GA: American
Society of Heating, Refrigeration and Air-Conditioning Engineers.
ASHRAE (2008). Standard 135-2008—A data communication protocol for building automation and control
networks. Atlanta, GA: American Society of Heating, Refrigeration and Air-Conditioning Engineers.
ENGINEERING GUIDE - SYSTEM CONTROLS
Cisco (2009). Open system interconnection (OSI) reference model. Retrieved from:
http://docwiki.cisco.com/wiki/Internetworking_Technology_Handbook
Price Industries (2011). Price engineer's HVAC handbook—A comprehensive guide to HVAC fundamentals.
Winnipeg, MB: Price Industries Limited.
G-30
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
SECTION G
System Controls
Product Overview
System Controls
Pneumatic Controls
CP 101, CP 100, CP 200
Price Pneumatic controls provide accurate, pressure independent control
between factory preset minimum and maximum flow limits. Compatible with
direct acting or reverse acting thermostats. ........................................ G34-G37
Electronic/Analog Controls
Price Analog Controller (PAC)
Price Analog electronic controls are an option for small to medium sized VAV
applications. Precise control of air flow and room temperature can be achieved
without the cost of a DDC system or a compressed air source, making them
ideal for retrofits and additions. ............................................................ G38-G41
Direct Digital Controls (DDC)
Price Intelligent Controller (PIC)
SYSTEM CONTROLS
The Price Intelligent Controller (PIC) is a cutting edge control package that
offers a new level of zone control. An advanced and configurable proportional
integral (PI) controller allows for exceptional user comfort and energy
efficiency. Installation of the controller and thermostat is simple and error proof
with RJ-45 (network type) connections to the thermostat and BACnet network.
.................................................................................................................. G42-G53
Price Wireless Thermostat System
PWTS
The Price Wireless Thermostat System provides both sensor inputs and a point
of control for Price controllers. The Dial thermostat can be mounted in any
location and needs no wiring. This makes it ideal for glass offices and cubicles.
.................................................................................................................. G54-G56
Prodigy® Series
The Price Prodigy® diffuser features an architecturally pleasing faceplate design and
high performance inner cone. A DDC controller utilizes advanced adaptive control
algorithms and a high torque motor to modulate air flow and maintain constant
room temperatures. The Prodigy® Series allows for true VAV control in cooling
and heating cycles. Reheat, control of up to five drones, building automation, and
system pressure control are all possible with the Prodigy® Series........... G59-G63
Rooftop Controls
Price Rooftop Unit Controller (PRTU)
The new Price Rooftop Unit controller (PRTU) is an advanced proportional
integral (PI) digital controller that offers state of the art control of a packaged
rooftop unit. Multiple pre-programmed and pre-tested control strategies are
available for an easy to install and reliable system package. ............ G64-G-77
G-34
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
Product Overview
System Controls
Underfloor Controls
Price has a full line of Underfloor controls including the UMC1, UMC3
for interior zones and the UMCB for perimeter zones requiring heating.
................................................................................................................... G80-G83
Heater Controls
Price Silicon Controlled Rectifier (SCR)
The Price SCR Controller is a Silicon Controlled Rectifier that provides
proportional modulation to the output over its full operating range. The SCR
acts like an electronic switch that turns on and off large amounts of power to
the load (heater). The Price SCR uses a Zero Crossing feature that allows a soft
start of the electronic load, which eliminates power surges. .............. G84-G85
The Price Silent Guard Heater Control Module provides control with a wide
range of features to cover all control, safety and troubleshooting concerns.
.................................................................................................................. G86-G87
Motor Speed Control
Universal Speed Controller (USC)
The Price USC allows for control of any PSC motor up to 1 HP within the 115 –
277 VAC range. The USC is UR certified. ....................................................... G88
Motor Speed Control
ECM Standard Speed Controller
The Price standard ECM speed controller allows the user to adjust the ECM
motor's speed either with a manual dial or a 2 – 10 VDC analog input signal. A
status LED blinks out the current mode. ....................................................... G89
Motor Speed Control
ECM Deluxe Speed Controller
The Price ECM deluxe speed controller offers a digital readout to display the
current fan speed (in%) and the motor RPM. Adjustments are made with up/
down push buttons or remote 2 -10 VDC signal. ................................. G90-G91
Price Field Service Tools
Price Bootloader: The Price Bootloader runs on the latest Price controls and
can allow re-loading of firmware through the thermostats service port.
Price Field Programmer: The Price Field Programmer is a small device that
reprograms the controller with new firmware without the use of a computer.
.................................................................................................................. G92-G93
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-35
SYSTEM CONTROLS
Heater Controls
Price Silent Guard (PSG)
System Controls
Pneumatic Controls
Pneumatic Velocity Controller Types
CP101 Controller
The CP101 pneumatic velocity controller
is the most versatile pneumatic controller
available. This unique controller maintains
the air flow dictated by the thermostat while
compensating for changes in duct static
pressure. The air flow control is pressure
independent.
CP101
Controller
SYSTEM CONTROLS
Factory calibrated to the specified maximum
and minimum air volumes, the CP101 can be
easily adjusted in the field. Note that field
adjustment is required only when operating
conditions change ‑ not as a maintenance
procedure.
• Provides accurate control over a duct
velocity range of 0 ‑ 3000 fpm.
• Operates at low system pressures.
• Completely pressure independent.
• Adjustable maximum and minimum air
volume settings easily field adjusted if
required.
• Reset span remains constant regard­less
of maximum and minimum air volume
adjustments.
• Provides constant 5 psi reset span as per
standard factory calibration.
• Has adjustable start point for reset span
to accommodate auxiliaries such as
reheat coils.
• Includes option to expand reset
span to 10 psi to accommodate most
thermostats (see notes).
• Adjustable to accommodate either direct
acting or reverse acting thermostats.
Also settings for either normally open
or normally closed damper operation
without added control components (see
notes).
• Mounted face down as standard. All
adjustments and tubing connections
are directly accessible through a ceiling
opening.
• Air volume adjustment knobs include
slots to allow screwdriver adjustment.
• Models with normally open dampers
can be programmed for early morning
warm up or cool down.
• Operates on 15 ‑ 25 psig main air source
of clean, dry air (see notes).
• Control air consumption no more than
0.017 cfm.
Notes:
1.For a constant 10 psig reset span, the
control system main air source must be
maintained at a minimum of 20 psig.
2. Damper actuator will require reloca­tion
to reverse damper rotation if changing
from normally open to normally closed
or vice versa.
G-36
CP200
Controller
Reverse Acting
CP100
Controller
Direct Acting
3. Price cannot warrant against oil, water
or other contaminants that may occur
in the main control air. Neither can Price
warrant against inadvertent exposure to
main control pressures in excess of 25
psig as qualified above.
CP100 or CP200 Controller
For applications less demanding than those
where the CP101 controller is required,
the lower priced CP100 or CP200 can be
furnished.
While the start point is fixed at 8 psi, the
span shifts as the maximum air volume
setting is adjusted to values that are less
than 100%. The conservative selection of
terminal units will result in reset spans that
are significantly reduced from the nominal
5 psi. For example, a maximum air volume
selection made at 60% capability (1800 fpm
inlet velocity) will result in a reset span in
the order of 1.7 psi. More conservative
selections will result in reset spans that
approach a simple on/off operation.
Operation is completely pressure indepen­
dent, with adjustable maximum and
minimum air volume settings. Both the
CP100 and CP200 controllers feature a
constant reset start point at 8 psi. The direct
acting CP100 operates from 8 psi to 13 psi.
The reverse acting CP200 operates from 8
psi down to 3 psi.
To minimize the outlined concerns with the
CP100 or CP200 controllers, terminal unit
selections should be made from the upper
25% of the performance range.To eliminate
these concerns completely, consider
the more versatile CP101 controllers as
described earlier on this page.
The available reset span will be governed
by the point of selection of the terminal
unit from the performance table. The full 5
psi reset span is obtained only when the
maximum air volume is set at 100% of the
terminal unit capability. 100% capability is
defined as the air volume when the terminal
inlet velocity is 3000 fpm.
Performance characteristics of the CP100
controller are illustrated on page F15,
Manufacturer C.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Pneumatic Controls
Pneumatic Velocity Controller Operation
A velocity controller receives input data in
the form of a velocity pressure signal from
the inlet sensor. The controller compares this
input data to its velocity pressure setpoint
and produces the appropriate output signal
(psi) to maintain this setpoint (pressure
independent operation). The output signal
(psi) positions the pneu­matic actuator which
in turn positions the damper to maintain the
desired air flow.
© Copyright Price Industries Limited 2014.
SYSTEM CONTROLS
The controller setpoint can be reset by
the output signal (psi) of the thermostat
in accordance with room temperature. The
controller setpoint can be varied between
the precalibrated minimum and maximum
flow limits. The range of thermostat output
pressure to which the controller varies its
setpoint from minimum to maximum is
known as the 'reset span' of the controller.
The reset span is usually 8 ‑ 13 psi for
operation with a direct acting thermostat.
The pressure at which the controller setpoint
begins to increase from the minimum limit
is known as the 'reset start point' of the
controller. The reset start point is usually
8 psi for operation with both direct and
reverse acting thermostats.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-37
System Controls
Pneumatic Controls
Pneumatic Controller Characteristics
Velocity Controllers
Are Not All Equal!
Well-designed HVAC systems often do not
perform as well as expected because the
reset span (throttling range) of the installed
velocity controllers is too narrow.
SYSTEM CONTROLS
Some conventional controllers will modulate
over a full 5 psi reset span only when the
maximum air volume limit is set at 100%
of the air distribution assembly’s capability.
Other controllers have a full 5 psi reset span
only when the minimum air volume limit
is zero. The reset span of other controllers
may be affected by both the maximum
and the minimum air volume settings,
compounding the reset span reduction.
Under normal operating conditions, the
maximum air volume limit is more often
set at less than 100% of the assembly’s
capability (typically 50%), and the minimum
may be above zero. As a result there are
many installed controllers with effective
operating reset spans reduced to only a
fraction of the nominal 5 psi.
This situation is analogous to oversizing a
valve so that all of its regulating must be done
in a nearly closed position. Accurate control
is difficult at best, because of practical limits
to the sensitivity of a thermostat.
The curves on this page illustrate these
limitations and the Price solution to this
problem.
Manufacturer B’s Controller
Manufacturer C’s Controller
Here again the full reset span (5 psi in this
type) occurs only when the minimum air
volume setting is zero and the maximum
is 100%.
In this type (eg., CP100), the full 5 psi reset
span is obtained only when the minimum air
volume setting is zero and the maximum is
100%, as in B’s controller at the left.
The stop point is constant. Adjusting the
minimum air volume will change the start
point (and the reset span) substantially.This
may create a problem where a reheat coil
is to shut off right at the start point of the
controller.
However, in this type the start point is
constant (coordinates well with a reheat
coil) and only the stop point shifts as the
maximum air volume setting is adjusted.
At max./min. air volume limits of 80/20%,
the reset span is 3.8 psi. Changing the limits
to 60/40% further reduces the reset span to
1.7 psi.
Also as in B’s controller, when the max./min.
air volume limits are set at 80/20%, the reset
span is only 3.8 psi. Setting these limits at
60/40% will cut the reset span to 1.7 psi.
Manufacturer A’s Controller
In this controller, the reset span depends
upon both the maximum and the minimum
air volume settings. Changing either of these
settings can alter the reset span drastically.
The full reset span is 6 psi, but it is available
only when the maximum air volume limit is
set at 100% and the minimum is set at zero.
When the max./min. air volume limits are
set at 80/20%, the reset span is shortened
to 3.6 psi. If they are set at 60/40%, the reset
span is further reduced to 1.2 psi.
G-38
The Price Answer
The Price CP101 controller always modulates through its full reset span, regardless
of the maximum or minimum air volume setting. Hunting is avoided.The reset span
can be adjusted to a maximum of 10 psi (5 psi is standard). It is then held constant,
even if the air volume settings are changed.
Note also that the reset start point is adjustable to match various thermostat
throttling ranges such as 3‑8, 5‑10, 8‑13 or even 3‑13 psi ‑ and also to coordinate
with auxiliaries such as heating coils.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Pneumatic Controls
Selection Criteria – Pneumatic Controls
Selection Criteria for Single Duct
Terminals with Pneumatic Controls
There are several basic decisions that must
be made prior to specifying a variable
volume control system. First of all, the
selection of the desired thermostat and
damper action must be accomplished. The
selection of this combination is generally
dependent upon the climate of the area in
which the units are to be installed as well as
local fire and smoke prevention legislation.
Direct acting thermostats are generally
selected for colder climates where the
desire is to fall to a heating mode, thereby
protecting the building from freezing
conditions. Reverse acting thermostats
are generally more applicable for warmer
areas as an interruption of the pneumatic
power source will cause the units to fall
Thermostat Type
Direct Acting
Reverse Acting
Direct Acting
Reverse Acting
Terminal Unit Sizing
The most important feature of the pressure
independent terminal unit is its ability to
accept factory calibrated minimum and
maximum air flow limits that correspond
to the designer’s space load and ventilation
requirements for that space. Once the design
minimum and maximum air flows have been
determined the ductwork and terminal unit
which will supply the space must be sized.
The ideal selection would be accom­plished
by sizing the unit such that the maximum
cfm limit is between 70 and 85% of its full
rated capacity in accordance with catalog
recommendations.
There are many misconceived myths
that suggest that oversizing a terminal is
advantageous. Among these is the theory
that oversizing the unit will make the unit
operate quieter. In reality, this will simply
cause the unit to operate with its damper
in a near closed position most of the time,
resulting in an increase in noise levels to the
space. In addition, the velocity pressures that
correspond to the minimum and maximum
cfm limits will be signifi­cantly reduced, leading
to a severe reduction in the accuracy and
response time of the reset flow controller
operation.
In order to maintain a reasonable control
range, it is recommended that the minimum
limit not be set any lower than 25% of the
unit’s rated capacity.
Although the unit may be capable of
controlling air flows lower than 25%
of rated capacity, the accuracy of the
commercially available flow controllers
used today is reduced as the velocity
pressure signal they receive from the flow
sensor decreases. For optimal control,
it is recommended that the 25% limit
be observed.
© Copyright Price Industries Limited 2014.
Damper Failure Normally Open
Normally Open
Normally Closed Normally Closed Air Flow
100%
100%
0%
0%
Resultant Action
Hot Water Coil
Full Open
Full Closed
Full Open
Full Closed
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
SYSTEM CONTROLS
into a full cooling mode. Normally open
damper failure is generally preferable except
where prohibited by local smoke control
regulations. Failure to normally closed will
result in the complete restriction of air flow
to the space. The table above illustrates the
available damper/thermostat combinations
and the relations of each to a loss of main
air pressure.
G-39
PAC Controller
PRICE ANALOG CONTROLLER
The Price Analog Controller (PAC) is an ideal option for small
to medium sized VAV applications. Precise control of air flow
and room temperature can be achieved without the cost of a
DDC system or a compressed air source, making this
controller ideal for retrofits and additions.
Ability to set air flow limits at the
thermostat without the need to
access the ceiling space
True digital PI control and pressureindependent airflow tracking
A low-cost
pressureindependent
VAV controller.
Compatibility with Price Linker
USB service tool for easy
changes in the field
www.priceindustries.com for additional product
information, including product videos and brochures.
System Controls
Electronic Controls
Electronic Controls
The PAC analog electronic controller comes
equipped with:
• [4] 24 VAC Binary Outputs
• [1] 0-10vdc Analog Output
• [1] Analog Input for SAT (HCCO) Probe
• [1] 24 VAC Binary Input for Contact Closure
• Pre-wired damper outputs when ordered
on a Terminal
• Tstat connections for PAC Dial Stat
operation (Field Wired -Terminals 1-8)
Price analog electronic controls are available
on our full line of terminals including:
• Single duct (SDV)
• Fan powered, constant volume (FDC)
• Fan powered, variable volume (FDV)
• Retrofit (RDV, IDV, SRDV)
A wide variety of standard control sequences
are offered for Single Duct units, Fan Powered
Constant Volume units and Fan Powered
Variable Volume units. A list of the more
common applications include:
• Heat/cool changeover
• 3 stage electric heat -Analog modulating
reheat
• Occupancy Override through contact
closure
If changes to the PAC controller are necessary,
they can quickly and easily be done with the
Price Linker and Linkersoft software. Using
the Price Linker, a simple connection from
the service port on the PAC Dial Stat to a USB
port on the user's laptop, will allow you to
make these changes. Also available is the
Price LCD-Setup tool, which allows users
to setup the PAC using a portable service
tool. This tool does not require a laptop and
features easy to use menus on a LCD screen
with push button interface.
© Copyright Price Industries Limited 2014.
SDV with PAC
PAC Controller
SYSTEM CONTROLS
Price PAC analog electronic controls are an ideal
option for small to medium-sized stand alone
VAV applications. Each Price PAC controller
comes preconfigured from the factory with
pre-set air flow ranges and thermostat
setpoint ranges. The Price PAC controller
now eliminates the need for additional
relays and switches when new strategies
are required. While being an analog electric
device, this controller has the functionality to
accomplish any single duct or fan powered
application in the field. Price PAC controls do
not require compressed air, making them ideal
for additions, renovations or retrofits. Ease of
installation and low maintenance are other
benefits of the Price PAC control system. Price
can also provide a Linker Device with every
PAC system, and easy to use FREE Linkersoft
software that is now available on our website
at http://www.priceindustries.com. The Price
PAC controller comes with the PAC Dial Stat
that allows for complete control of your
terminal unit. The Price PAC controller comes
with several pressure independent sequences
that cover a wide range of control strategies
and no additional hardware is required.
PAC Dial Stat
PAC Actuator
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-41
System Controls
Electronic Controls
Electronic Control Components
Controller/Actuator
Price PAC controls include a PAC analog
controllerwithanonboardpressuretransducer
for pressure independent operation. The
transducer receives its flow signal from our
standard SP300 multipoint sensor, providing
accurate pressure independent control,
even under conditions of non-uniform flow.
Since sensitive electronic components are
located outside the airstream, reliability
and long term precision are increased. The
actuator features 40 in-lb of torque and uses
a tri-state signal to position the damper. A
magnetic clutch prevents stall of the motor
when an end stop is reached. On power up,
the PAC controller will drive the damper fully
closed and calibrate for 2 minutes. After this
duration, the controller will start to control to
the room demand.
SYSTEM CONTROLS
Room Thermostat
The Price PAC Dial is an architecturally
pleasing thermostat and allows for
consistency throughout a building with other
Price thermostats. The PAC control system
requires eight wires to be connected from the
controller down to the thermostat, enabling
full functionality. The dial face is marked
with a flame and snowflake for heating
and cooling adjustments. The maximum
and minimum setpoint limits are factory
set to customer requirements, but also are
configurable through Price's Linker software,
which allows the end user to increase or
decrease the dead band of the thermostat.
Balancing of the VAV unit is also achieved
through the Linker Software or LCD-setup
service tool.
User's
Laptop
USB-A to USB-B Cable
(supplied)
Linkersoft Highlights and Features
Price Linkersoft software is easy to use and
easy to install, and can be downloaded
right from Price's website at http://www.
priceindustries.com/content/uploads/assets/
software/linkersoft2.pdf. Linkersoft has many
functions available that allow you to change
settings and parameters if required. The
featured menus are:
• Balancing: which allows for onsite
balancing during commissioning
• VVT mode: for pressure dependent
operation
• VAV mode: for pressure independent
operation
• Setpoint allows you to adjust setpoint
min. and max. ranges
• Input adjustments to the change-over
probe are available
• Output
- Fan - for fan sequences, the operation of
the fan can be selected if required.
- Heat - reheat type can be selected here.
- Analog - the PAC controller features an
analog output that can be set to control
either heating or cooling analog valves.
G-42
Price USB
LINKER
PAC Dial Stat
LCD Stat
RJ12
Service
Cable
(supplied)
Connection of Linker Device to laptop computer:
Price's Linker Device can be ordered with the PAC system for easy adjustment in the field,
if required.The menu structure is easy to follow, and allows anyone from building owners,
operators and contractors to use this software. Connections from the PAC thermostat to
your laptop are simple, with both cables supplied. The RJ12 flat cable gets plugged into
the Service Port of the PAC thermostat, while the other USB end gets plugged into the
USB port of your computer. With the PAC controller powered with 24 VAC, the Linkersoft
software can be launched, and access to the menus are now available.
Remember! Support for this product is available by calling the Application Engineering
Department at the Winnipeg facility.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Direct Digital Controls
DDC Controls
Direct Digital Control
The DDC terminal unit controls are
sometimes specified to be supplied by
the controls contractor in order to ensure
compatibility with a proprietary Building
Automation System (BAS).
Typically the controls contractor will
supply the terminal unit controller which
incorporates an air flow transducer, a
variety of inputs and outputs and an electric
actuator.
In order to simplify integration of terminal
unit controls with the Building Automation
System (BAS), Price will factory install
DDC controls supplied by various controls
manufacturers. When requested, Price will
factory install, wire and mount specified
control components on the terminal unit.
When required a protective shroud is
supplied by Price to enclose the control
components.
The Price multipoint flow sensor is
compatible with most DDC controls on the
market and is recommended for applications
requiring factory mounting of DDC controls.
Price will also provide operational checks
and calibration of control components
before factory shipment, on request.
These additional services performed in
the factory ensure an operational unit and
reduce field labor.
Price can also supply its own brand of
DDC controls called the Price Intelligent
Controller (PIC). This controller can
operate stand alone or be networked to a
Building Automation System (BAS) using
the ASHRAE standard BACnet. The PIC
controller is shown below on the A terminal
unit. For more information, see the Price
Intelligent Controller (PIC) section of the
catalog.
Control Components
The typical DDC terminal unit will consist of the following components:
Price SP300 Sensor
The multi‑point flow sensor directs
inlet velocity pressure data to the
DDC controller. Multiple pickup points,
designed to average flow across the
inlet provide an accurate indication of air
volume under varying flow conditions.
In addition, the velocity pressure signals
are amplified for increased sensitivity
and control response.
© Copyright Price Industries Limited 2014.
Actuator
24 VAC bi‑directional actuator.
SYSTEM CONTROLS
Terminal Unit Controller
The microprocessor based controller
performs pressure independent
operation of a wide range of VAV
terminal box applications. Controllers
can also be networked to a personal
computer or building automation
system for centralized monitoring and
control.
Flow Transducer
The on-board flow transducer converts
the velocity pressure signal to an
electronic signal for processing by the
controller.
Protective Shroud
When specified control components
are mounted within a protective metal
shroud supplied by Price. Knock‑outs
are provided for field wiring. Each unit
is tagged with all pertinent specifications
as well as a wiring diagram.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-43
Price Intelligent Controller
A UNIVERSAL DDC CONTROLLER WITH BACNET
INTEROPERABILITY
PIC FEATURES:
• Fast and errorproof RJ-45 thermostat connections.
•
Integrated actuator.
•
24 VAC binary switched outputs that are field switchable
between hot and common.
•
Analog (0-10 VDC) outputs that are configurable for heating,
cooling, fan, and auxiliary.
•
Field installable expansion modules for BACnet MS/TP and
VAV flow sensing.
•
Pluggable terminal blocks for easy field wiring.
•
Diagnostic LEDs showing status of each output, including
damper direction.
A new level of control for
even the most specialized
commercial building
applications.
Combines the accuracy of
direct digital control with the
flexibility of an individual room
system to provide maximum
control and efficiency.
Various thermostat options allow the designer to match
the specific needs of the customer.
THERMOSTAT SUPPLIED BY OTHERS
LCD THERMOSTAT
WIRELESS THERMOSTAT
This option allows PIC to interface to a
third-party thermostat or control system.
This model measures room temperature
and houses a LCD screen with push button
set-point adjustment.
ROOM SENSOR THERMOSTAT
LCD THERMOSTAT with MOTION SENSOR
Provides the user with the freedom of
accurate system control anywhere in the
occupied space. Position in the best
possible location for optimal temperature
control.
This model measures room temperature.
Temperature set-points are set through
software.
DIAL THERMOSTAT
All the features of the LCD Thermostat plus
the added value of a motion sensor that
allows for automatic detection of space
occupation.
This model measures room temperature
and features a dial adjustment and an
occupancy button with LED.
Computer Accessibility
If any changes are needed, the PIC
interface cable and software can be used
to make changes easily after installation
BACnet Expansion Module
This allows for full control and setup of
the PIC on a BACnet MS/TP network
www.priceindustries.com for additional product
information, including product videos and brochures.
VAV Expansion Module
Using a state-of-the-art air flow sensor
with the PIC’s proportional integral control
allows for fast and reliable air flow control
System Controls
Price Intelligent Controller
Introduction
Direct digital control is a proven control
technology that has traditionally been used
in large-scale building automation systems.
DDC has brought unprecedented control
and efficiency to building ventilation. The
PIC combines the accuracy of direct digital
control with the flexibility of an individual
room system, providing maximum control
and efficiency.
Price Intelligent Controller (PIC)
SYSTEM CONTROLS
The Price Intelligent Controller (PIC) is a
cutting edge control package that offers
a new level of zone control. An advanced
and configurable proportional integral
(PI) controller allows for exceptional user
comfort and energy efficiency. Installation
of the controller and thermostat is simple
and error proof with RJ-45 (network type)
connections to the thermostat and BACnet
network.
The PIC is designed with a modular
architecture. Options such as BACnet
networking and air flow sensing are offered
as 'add-on modules'. This allows flexibility
to the customer by providing both value
in the 'core' controller as well as powerful
control and communication options with
the use of the expansion modules.
Any PIC ordered with either the BACnet or
Pressure Independent Control options will
ship with the appropriate modules installed
and mounted. Modules may also be fieldmounted and connected to the PIC with a
single ribbon-type cable.
The PIC is available with several thermostat
options allowing the designer to match the
specific needs of the customer. Every model
of thermostat has an RJ-12 service port
allowing setup and configuration access
without having to access the plenum.
The PRICE LINKER setup tool (combined with FREE software) can be used to reconfigure
the PIC from this service port. A stand-alone setup tool 'LCD-SETUP' is available.
Alternative methods of reconfiguration include the LCD thermostats, BACnet software.
(see page G-21 for more information on setup tools)
DDC vs. Analog Electronic Contols
The PIC is a Direct Digital Controller (DDC). The PIC offers many advantages over the older
analog electronic style controllers.
1.Full tunable Proportional + Integral control for fast, accurate control with little
overshoot.
2.Digital thermostats with setup and balancing functions.
3.Multiple customizable outputs (Binary and Analog).
4.Native BACnet module for interface to building automation and polling systems.
5.Sequence of operation changeable in the field if required.
BACnet network
LINKER interface and software
for local setup
G-46
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Price Intelligent Controller
PIC Features
The Price Intelligent Controller comes with the following standard
features:
Price Intelligent Controller (PIC)
SYSTEM CONTROLS
• Stand-alone or BACnet network operation (with the optional BACnet
expansion module)
• Integrated actuator
• Service port on all thermostat models provides a computer interface
(using the Price USB LINKER) for setup/balancing when LCD
thermostat is not available/sufficient.
• A range of thermostat options from a room sensor thermostat up to
a motion controlled LCD thermostat.
• Expansion modules add additional functionality when required
• Fast and error proof RJ-45 thermostat connections
• LED’s on the PIC indicate the status of all outputs, aiding with
troubleshooting.
• Adjustment of sequence parameters, settings, and balancing
are possible from the password-protected service menu of LCD
thermostats.
• A variety of Heat control interfacing is available. 24 VAC Binary,
PWM, Analog 2-10V, 0-10V, etc, (11 standard outputs in total)
• 24 VAC binary switched outputs field switchable between hot and
common
• Analog (0-10 VDC) outputs fully configurable for heating, cooling,
fan, and auxiliary
• VAV module (optional) provides air flow sensing for true VAV control
• BACnet module (optional) provides a native BACnet MS/TP interface
Thermostat Options
Room Sensor Thermostat Dial Thermostat
(PIC-TS-SENS)
(PIC-TS-DIAL)
LCD Thermostat
(PIC-TS-LCD)
LCD Thermostat
with Motion Sensor
(PIC-TS-MOTION)
PRICE Wireless
Thermostat System
Room Sensor Thermostat (PIC-TS-SENS)
This economical model of thermostat measures room temperature. The set-point can be set from a hidden dial on the back of the T-Stat,
through free setup software, or through a BACnet system. This eliminates the problem of unauthorized tampering without the need for
visually unappealing thermostat lock boxes.
Dial Thermostat (PIC-TS-DIAL)
This model measures room temperature and features a dial adjustment and an occupancy button. Temperature set-point limits are set
through software/BACnet.
LCD Thermostat (PIC-TS-LCD)
This model measures room temperature and features an LCD screen with an advanced menu structure and three pushbuttons. Temperature
set-point limits are set through software/BACnet.
Balancing and modification to the controller setup can be accomplished from the LCD screen.
LCD Thermostat with Motion Sensor (PIC-TS-MOTION)
This model possesses the same features as the LCDT-Stat with the addition of a passive infrared motion sensor.The motion sensor allows
for automatic detection of space occupancy and therefore can save energy by shutting down during unoccupied periods.
Price Wireless Thermostat
The Price Wireless Thermostat System provides both sensor inputs and a point of control for Price controllers. The Dial thermostat can
be mounted in any location and needs no wiring. This makes it ideal for glass offices and cubicles.
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-47
System Controls
CO2/Humidity Thermostat
Product Information
The new Price CO2/Humidity thermostat
option offers the latest in sensor
technologies. Using an on board nondispersive infrared (NDIR) sensor, the
thermostat can accurately measure CO2
levels without the need for recalibration.
(Chemical sensors on the other hand require
constant replacement.) CO2 levels are
displayed on the thermostat’s LCD screen
and are also available as a BACnet point
displaying CO2 in parts per million (PPM).
CO2/Humidity Thermostat
SYSTEM CONTROLS
The on board surface mount technology
humidity sensor is fully factory calibrated
and has a wide operating range with high
accuracy. The humidity reading is available
on the LCD thermostat screen and as a
BACnet point when used with the Price
Intelligent Controller (PIC).
Please note the CO2/Humidity thermostat is
intended to be used with the Price Intelligent
Controller (PIC) as a single device solution.
(Both the thermostat (temperature/set
point) and monitoring (CO2/Humidity) in
one clean package.)
Two pre-tested CO2 control sequences
are available for the PIC.
1. Purge mode
a.While the space CO2 is below the
adjustable threshold, the VAV box is
controlled normally based on room
temperature load
b.If the space CO2 level rises above the
user-set threshold, the controller will
command the VAV box to deliver a preset maximum air volume into the space.
c.Once the CO2 level drops back below
the threshold, the VAV box returns to
its normal control mode based on room
temperature load.
Price Intelligent Controller
2.CO2 airflow control
a.In this mode, the airflow through the
VAV terminal is directly proportional to
the CO2 level in the occupied space.
b.As the CO2 level increases from a
user-set minimum level, to a user-set
maximum level, the airflow is increased
proportionally between the pre-selected
minimum and maximum airflow set
points.
c.This control mode is typically applied as
a dedicated fresh-air terminal unit.
Key CO2 Features:
Key Humidity Features:
• Accurate NDIR sensor
• Wide range humidity readings (5-100%)
• No need for replacement/recalibration
• High accuracy sensor with +-3% at room
temperatures
• Pre-loaded sequences for handling CO2
available in the Price Intelligent Controller
(PIC) for terminals
• Monitoring for CO2 available as a BACnet
point for BMS integration
G-48
• Long life, very low drift digital sensor
• Monitoring for Humidity available as a
BACnet point for BMS integration
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Price Intelligent Controller
Optional Expansion Modules
BACnet Module (PIC-BAC)
With native BACnet MS/TP compatibility, the PIC can tie into an
existing or future BACnet compliant BAS system for maximum
flexibility.
BACnet Module
(PIC-BAC)
When connected, the network monitors all of the controller’s
functions and variables, assigns set-points, and initiates occupied,
unoccupied and night setback modes taking advantage of the level
of control and visibility inherent to BAS systems.
A computer on the BACnet network can also be used to configure
the PIC instead of using the keypad on the LCD-Stat.
Each PIC on the BACnet network can relay data containing a variety
of setup and room condition information.This can be read by other
controllers (such as the Price PRTU rooftop controller) allowing for
intelligent decisions to be made at the air supplier level. See the
PRTU Engineering Guide for more information.
VAV Module
(PIC-VAV)
VAV Module (PIC-VAV)
The VAV module increases the PIC’s functionality by adding pressure
independent air flow control. The air flow transducer contained in
this module used in conjunction with Price's SP300 flow sensor
provides consistent, highly accurate readings.
For applications that require lower minimum airflow a VAV-LF
module is available. This option allows minimum flows that are
approximately 50% lower than standard. This allows energy savings
during low load requirements and helps prevent overcooling (or
needing reheat) for the occupied space. This also extends the range
of a terminal unit allowing a single size to cover a larger load range.
SYSTEM CONTROLS
Low Flow VAV Module (VAV-LF)
Low Flow VAV Module
(VAV-LF)
Installation and Setup
Installation and configuration of the PIC is simple. All wiring
terminals are of the pluggable type – allowing the contractor to make
connections quickly and easily.
Thermostat
Price Intelligent Controller
Thermostat and BACnet network connections are made using
modular (RJ-45) connectors. Plenum-rated and factory tested RJ45 cables are provided by Price where required.
The PIC comes factory calibrated and mounted to Price VAV boxes,
but may also be ordered stand-alone for retrofit jobs.
Installing the PIC
1. Mount the controller onto the duct with the damper shaft going
through the PIC’s actuator. Tighten the screws on the actuator.
2.Secure the back end of the controller using the supplied antirotational bracket.
3.Connect any of the controller’s outputs as required.
4.Power the PIC using 24 VAC.
Installing a Thermostat
1.Install the thermostat back-plate to a standard electrical box or
directly to drywall using anchors (supplied by others.)
2.Connect the T-Stat to the PIC’s T-Stat jack using the supplied
plenum-rated modular (network type) cable.
3.Clip the thermostat onto the back-plate and tighten the set screw
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-49
System Controls
Price Intelligent Controller
Setup of the PIC
The PIC comes pre-calibrated from the factory. However if
field conditions require readjustment the Service/Maintenance
personel may change PIC settings.
There are several ways to access setup variables in the PIC:
SYSTEM CONTROLS
1.Through the password protected menu structure built into the
LCD thermostats
2.Through the BACnet network (for controllers ordered with the
BACnet option, or those with the BACnet module field-installed)
3.Through the service jack located on the bottom of each
thermostat and the Price LINKER.
The LINKER is a USB 2.0 interface to Price controls. It is used in
conjunction with FREE setup and balancing software available
from Price.
4.Using the stand-alone setup tool: LCD-SETUP. This special
setup tool resembles the LCD thermostat in both appearance
and menu function. It can be plugged into either the Dial
Thermostat or the Room Sensor Thermostat and used to setup
the controller when a computer is not available.
LCD Thermostats
BACnet Module
Price LINKER (Setup Tool)
Stand-alone LCD-SETUP
Typical Application - Overview
The PIC can be factory configured to any one of more than 35 standard sequences, as well as special sequences if required. There are
three categories of sequences: Single Duct, Constant Volume Fan Powered (series box), and Variable Volume Fan Powered (parallel box).
Each of these types have different options: VAV vs VVT, field wired vs factory wiring, cooling-only vs HCCO, and various heat control
types. The following is a description of the different options.
VAV (Pressure Independent) vs VVT (Pressure Dependent)
Variable air volume (VAV) control can maintain the conditions in a space more accurately. This is due to pressure independence.
When the VAV module is present the PIC can maintain air flow at a constant volume independent of duct static pressure changes.
Variable VolumeTemperature (VVT) is pressure dependant. This is a more economical technology (initial investment) which will modulate
the damper position (%) and does not measure actual air volume entering the space. Actual air volume will vary depending on duct
static pressure and other variables. This is ideal for small systems such as rooftop.
All Pressure Independent (VAV) sequences start at 2800, 6800, and 8800 (depending on box type). All Pressure Dependent (VVT) sequences
start at 2850, 6850, and 8850.
Field vs Factory wiring
Many sequences may appear to be the same with simply the wiring type (field vs. factory) changing. A 'factory wired’ sequence is chosen
if the terminal is to have a factory-mounted electric duct heater installed. In these cases, the Price Factory will wire the PIC controller
to the duct heater.
Field-wired sequences are used with equipment such as perimeter radiation (baseboard heat) or hot water valves (either mounted to
the terminal or externally). These must be wired to the controller's outputs during installation in the field.
Cooling Only vs Heating/Cooling Changeover (HCCO)
All PIC sequences are designed for both cooling-only applications (where only cool air is supplied to the terminal) and for HCCO
applications (where both warm or cool air can be supplied to the box). The optional changeover probe (PIC-PRB) allows HCCO operation.
If no probe is connected to the PIC, the controller assumes it is receiving cool supply air, and acts accordingly.
Options
There are several optiona that are available on every sequence
1. BACnet network interface- A BACnet MSTP interface to connect to a BACnet BMS network.
2.Changover probe - A supply air temperature sensor (required for heating/cooling changeover systems)
3.Thermostats - Five models of thermostats are available for every PIC sequence.
G-50
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Price Intelligent Controller
Networking
With native BACnet MS/TP compatibility,
the PIC can tie into an existing or future
BACnet compliant BAS system for
maximum flexibility. When connected,
the network monitors all of the controller’s
functions and variables, assigns set-points,
and initiates occupied, unoccupied and
night setback modes taking advantage of
the level of control and visibility inherent
to BAS systems.
Network Diagram
A computer running BACnet communication
software can connect to each controller.
Master Slave Token Passing (MS/TP)
The network wire is connected in a daisy
chain configuration to each controller.
Typically the terminals are labeled plus (+)
and minus (-), but sometimes can be labeled
(A) and (B).
MS/TP is much more robust and economical
than Ethernet although has a lower data
speed. For example Ethernet can only be
run a maximum of 330 ft without a repeater,
while RS-485 (MS/TP) can be run up to
4000 ft without a repeater. Presently it is
not cost effective to put Ethernet on each
device. Price recommends keeping MS/
TP network length reasonable to ensure
reliable communication and simplify
troubleshooting, therefore the maximum
MS/TP network segment should ideally
not exceed 1050 ft and have no more than
30 devices.
Network Compatibility: Along with the capability for independent control, the
PIC offers native BACnet MS/TP compatibility, enabling the package to work with an
existing or future BACnet compliant BAS network for maximum flexibility.
Once a network of controllers is setup
using MS/TP the network segment is
typically connected to a computer running
a graphical software package (sometimes
referred to as a front-end).
PIC and PRTU: The PIC can be used in
conjuction with the PRTU. This allows for
polling of each zone's demand so that
intelligent decisions can be made by the
rooftop controller.
The software package graphics can
typically, show all networked controllers
and their variables, trend log and schedule
devices and objects. This allows for energy
savings and easier setup and maintenance
of the system. See the Price Rooftop Unit
Controller (PRTU) for more information.
For more information, see the PRTU in this
section of the catalog.
BACnet network continues
up a recommended 30
devices.
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-51
SYSTEM CONTROLS
MS/TP stands for Master Slave Token
Passing which is a robust low cost strategy
for networking controllers. BACnet MS/TP
uses the RS-485 standard which uses one
pair (2-wires) and a ground connection.
System Controls
Price Intelligent Controller
Typical Applications
Single Duct Cooling or Heat/Cool
Changeover
Single Duct Cooling or Heat/Cool Changeover
In this application, the damper is modulated
based on the zone temperature and duct
air temperature (with optional chaveover
probe) within the minimum and maximum
air flow limits. Sequence diagrams: 2800
and 2850
Single Duct Cooling/HCCO
With 1-3 Stages of Electric Heat
In electric heat applications, the damper is
modulated based on the zone temperature
within the minimum and maximum air
flow limits. In this application, up to three
outputs perform staged on/off control of the
heat. Each stage is energized independently
based on the heat requirement. Sequence
diagrams: 2801, 2802, 2851, and 2852.
Single Duct Cooling/HCCO With 1-3 Stages of Electric Heat
Single Duct Cooling/HCCO
SYSTEM CONTROLS
With Tri-State Modulating Heat
In tri-state modulating heat (usually hot
water) applications, both the damper and
the hot water valve are modulated based
on zone temperature. PI control sends a
corresponding clockwise (CW) or counterclockwise (CCW) signal to a tri-state actuator
positioning the valve. 1 stage of additional
24VAC binary heat can also be used.)
Sequence diagrams: 2803, 2853.
Single Duct Cooling/HCCO With Tri-State Modulating Heat
Single Duct Cooling/HCCO
With Analog Modulating Heat
In modulating heat (usually hot water or SCR
electric) applications, both the damper and
the hot water valve are modulated based
on zone temperature. PI control determines
the desired valve position or SCR heat level
and sends a corresponding 0-10V DC signal
to the motorized actuator or SCR heater
controller. Sequence diagrams: 2804, 2805,
2854, and 2855.
Single Duct Cooling/HCCO With Analog Modulating Heat
Series Fan Powered and Electric Coil
or Proportional Heat
In constant volume applications, the fan
operates continuously during occupied
periods. The primary flow is modulated
between the minimum and maximum
cooling set-points based on the thermostat
demand. When the zone temperature falls
below the zone set-point the stages of
heat will be energized. During unoccupied
periods the primary air system is off and
the fan runs intermittently to maintain the
zone temperature between the night setpoints. If zone temperatures can not be
maintained by the fan alone, heating coils
will be energized.
G-52
Series Fan Powered and Electric Coil or Proportional Heat
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Price Intelligent Controller
Applications
Parallel Fan Powered and Electric or
Proportional Heat
Parallel Fan Powered and Electric or Proportional Heat
When a variable volume terminal unit
is used the fan is off when room temp is
above the thermostat set-point. During
these periods primary air flow modulates
within the minimum and maximum limits
based on the zone temperature. If the zone
temperature cannot be maintained by the
fan alone, heating coils will be energized
.When the zone temperature drops below
the heating set-point, the fan is turned on.
When the zone temperature rises above the
set-point, the fan is turned off. In all cases,
the fan is subject to a minimum cycle time
which is adjustable to prevent short cycling.
Night Setback
Night Setback
SYSTEM CONTROLS
Night setback provides a means of
conserving energy by changing the
temperature set-points in the unoccupied
hours when environmental requirements
are reduced. By default, PIC controllers
with any sequence can enter night setback.
Sequence 9999 details night setback
operation and how a controller may enter
or exit night setback.
Typically, the heating set-point will be
reduced to 62 ºF. The primary trigger for the
PIC to enter night setback mode is primary
air flow failure. This will occur when the
main fan is shut down. The heating setpoint is then automatically changed to
a configurable night set-point (62°F by
default). If the room temperature falls below
the heating set-point the box’s auxiliary
heat will be energized. While in the night
setback condition, the box damper is parked
slightly open in order to sense the return of
primary air flow, at which point the PIC will
automatically return to normal operation.
See sequence 9999 for more details.
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-53
System Controls
Price Intelligent Controller
Applications
PIC and SCR (Silicon Controlled
Rectifier)
SCR (Silicon Controlled Rectifier)
The PIC outputs an analog (0-10V) signal
for heat applications. For the electric heat,
this signal would be tied directly into a SCR
device, which provides modulation of an
electric duct heater or an electric perimeter
heater.This configuration allows full 0-100%
control of the electric heater ensuring that
the room set-points are accurately met
without overshoot. This method of control
is much more accurate than standard on/off
(digital) or staged control.
SYSTEM CONTROLS
Benefits of SCR control
• Energy efficient - room set-points are
accurately maintained.
Undershoot
and overshoot are minimized, thereby
increasing comfort while reducing
operating costs.
• Noise reduction - Mechanical contactors
are eliminated. Noise from contactor
switching is completely eliminated
resulting in silent operation.
• Increased Reliability - The SCR is a solid
state device with no moving parts to
wear or break down.
G-54
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Price Intelligent Controller
Specifications - PIC
Power Requirements
24 VAC, 47-63 Hz 6 VA (not including output loading)
NEC Class II.
Price Intelligent Controller (PIC)
Ambient Ratings
32º to 131 ºF [0º to 55 ºC] 10 to 90% RH (non-condensing)
Outputs
24 VAC Binary (x7). Max 0.5Amps each, MAX 1.85A total Switched
HOT or Switched COMMON
SYSTEM CONTROLS
• Fan
• Stages of heat or heat open/close (x3)
• Cooling
• Damper CW
• Damper CCW
Analog 0-10 VDC (x4). Max: 10mA each.
• Fan (ecm)
• Heat
• Cool
• Aux
Inputs
Changeover sensor (10k Type J thermistor)
Contact closure (night setback)
Airflow sensor (optional)
Thermostat inputs
• Room set-point dial
• Temperature sensor (10K Type J thermistor)
o Accuracy of ± 0.5 °F from 55 °F to 85 °F
[± 0.25 °C from 13 C to 25 °C]
Communication ports
BACnet MS/TP Connection (optional)
• Communication speeds: 9,600, 19,200, 38,400, 76,800
(default),
• Maximum recommended nodes per MS/TP segment: 30
LINKER port
• For local setup using Price LINKER
Actuator Specifications
35 in-lbs (nominal torque). 90 seconds running time
90º maximum angle of rotation.
External slide knob for manual override.
Less than 35 db (A) noise level
Airflow Sensor Specifications
Optional 0-1 SLM flow sensor. (0-1in. w.c. equivalent)
Tubing Specifications
Flow Sensor tubing must be 1/4 in. outside diameter
Size
11 in. x 5.75 in. x 2.75 in.
Weight
1.8 lb. [816 g]
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-55
System Controls
Price Intelligent Controller
PIC - Table of Sequence Diagrams
SYSTEM CONTROLS
Number
Sequence Description
Controller
Required
Accessories
Reheat
2800
Pressure Independent Cooling or HCCO*
PIC
2801
Pressure Independent Cooling or HCCO
- up to 3 stage Electric Heat - Factory Wired
PIC
EC
VAV
2802
Pressure Independent Cooling or HCCO
- up to 3 stage Electric Heat - Field Wired
PIC
24VAC
Binary External**
VAV
2803
Pressure Independent Cooling or HCCO
- Tri-State modulating HW heat - Field Wired
PIC
HW or
Tri-State External
VAV
2804
Pressure Independent Cooling or HCCO
- Analog electric heat - Factory Wired
PIC
EC
VAV
2805
Pressure Independent Cooling or HCCO
- Analog heat - Field Wired
PIC
0-10V HW or
0-10V External
VAV
2850
Pressure Dependent Cooling or HCCO
PIC
2851
Pressure Dependent Cooling or HCCO
- up to 3 stage Electric Heat - Factory Wired
PIC
EC
2852
Pressure Dependent Cooling or HCCO
- up to 3 stage Electric Heat - Field Wired
PIC
24VAC
Binary External
2853
Pressure Dependent Cooling or HCCO
- Tri-State modulating HW heat - Field Wired
PIC
HW or
Tri-State External
2854
Pressure Dependent Cooling or HCCO
- Analog electric heat - Factory Wired
PIC
EC
2855
Pressure Dependent Cooling or HCCO
- Analog heat - Field Wired
PIC
0-10V HW or
0-10V External
6800
CV*, Pressure Independent Cooling or HCCO**
PIC
6801
CV, Pressure Independent Cooling or HCCO
- up to 3 stage Electric Heat - Factory Wired
PIC
EC
VAV
6802
CV, Pressure Independent Cooling or HCCO
- up to 3 stage Electric Heat - Field Wired
PIC
24VAC
Binary External***
VAV
6803
CV, Pressure Independent Cooling or HCCO
- Tri-State modulating HW heat - Field Wired
PIC
HW or
Tri-State External
VAV
6804
CV, Pressure Independent Cooling or HCCO
- Analog electric heat - Factory Wired
PIC
EC
VAV
6805
CV, Pressure Independent Cooling or HCCO
- Analog heat - Field Wired
PIC
0-10V HW or
0-10V External
VAV
6850
CV, Pressure Dependent Cooling or HCCO
PIC
6851
CV, Pressure Dependent Cooling or HCCO
- up to 3 stage Electric Heat - Factory Wired
PIC
EC
6852
CV, Pressure Dependent Cooling or HCCO
- up to 3 stage Electric Heat - Field Wired
PIC
24VAC
Binary External
6853
CV, Pressure Dependent Cooling or HCCO
- Tri-State modulating HW heat - Field Wired
PIC
HW or
Tri-State External
6854
CV, Pressure Dependent Cooling or HCCO
- Analog electric heat - Factory Wired
PIC
EC
6855
CV, Pressure Dependent Cooling or HCCO
- Analog heat - Field Wired
PIC
0-10V HW or
0-10V External
8800
VV*, Pressure Independent Cooling or HCCO**
PIC
8801
VV, Pressure Independent Cooling or HCCO
- up to 3 stage Electric Heat - Factory Wired
PIC
G-56
VAV
VAV
VAV
EC
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
VAV
© Copyright Price Industries Limited 2014.
System Controls
Price Intelligent Controller
PIC - Table of Sequence Diagrams
Number
Sequence Description
Controller
Reheat
Required
Accessories
VV, Pressure Independent Cooling or HCCO
- up to 3 stage Electric Heat - Field Wired
PIC
24VAC
Binary External***
VAV
8803
VV, Pressure Independent Cooling or HCCO
- Tri-State modulating HW heat - Field Wired
PIC
HW or
Tri-State External
VAV
8804
VV, Pressure Independent Cooling or HCCO
- Analog electric heat - Factory Wired
PIC
EC
VAV
8805
VV, Pressure Independent Cooling or HCCO
- Analog heat - Field Wired
PIC
0-10V HW or
0-10V External
VAV
8850
VV, Pressure Dependent Cooling or HCCO
PIC
8851
VV, Pressure Dependent Cooling or HCCO
- up to 3 stage Electric Heat - Factory Wired
PIC
EC
8852
VV, Pressure Dependent Cooling or HCCO
- up to 3 stage Electric Heat - Field Wired
PIC
24VAC Binary
External
8853
VV, Pressure Dependent Cooling or HCCO
- Tri-State modulating HW heat - Field Wired
PIC
HW or
Tri-State External
8854
VV, Pressure Dependent Cooling or HCCO
- Analog electric heat - Factory Wired
PIC
EC
8855
VV, Pressure Dependent Cooling or HCCO
- Analog heat - Field Wired
PIC
0-10V HW or
0-10V External
SYSTEM CONTROLS
8802
Notes:
*VV is Variable Volume
** HCCO is 'Heating/Cooling Changeover'. (cool or warm air suppled to terminal)
***External means reheat external to the terminal - non box-mounted. (i.e. Perimeter Radiation, etc.)
****NSB is Night Setback
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-57
Wireless Thermostat
PLACEMENT FLEXIBILITY FOR OPTIMAL
TEMPERATURE CONTROL
•
•
Whether installed on a brick or glass wall, the Wireless
Thermostat from Price provides accurate system control
anywhere in the occupied space. Relocation due to office
renovations is greatly simplified. The Wireless Thermostat
will operate with all of the new-generation Price controls.
Compatible with the Price Intelligent
Controller (PIC) and the
Prodigy Smart Diffuser
•
Simple field setup results in
reduced installation and labor costs
Up to 5-year battery life
FCC and IC certified
wireless module
Off-the-shelf userreplaceable batteries
Range:
Up to 50 feet through typical walls
www.priceindustries.com for additional product
information, including product videos and brochures.
System Controls
Price Wireless Thermostat Kit
Product Overview
Introduction
Occasionally an installation arises
where running CAT5 and other wiring is
inconvenient or even impossible. For jobs
such as these, Price is proud to introduce
its Wireless thermostat. Using cutting
edge wireless technology, a base station
mounted under the floor or in the ceiling
communicates with a battery powered
remote thermostat up to 50 ft away. The
thermostat also contains a temperature
sensor, which is linked to the base through
the wireless connection as well. The remote
unit requires no wiring whatsoever, making
the Price Wireless Thermostat kit quick and
easy to install.
Wireless Thermostat - Overhead Ventilation
What’s included?
The Price Wireless Thermostat Kit comes
with everything you need to get set up.
Included in the kit are:
The back plate of the wireless remote
thermostat can be removed and installed
wherever it is most convenient. Avoid
positioning on an outside wall, and mount
away from metal to achieve maximum
signal strength. For overhead applications
the base module can be mounted directly to
metal ductwork using the supplied mounting
bracket for Underfloor applications use the
included accessory basket for base module
mounting. Price recommends mounting the
accessory basket near or on top of the UMC3
or UMCB controller for easy future access.
Ensure the dipswitches on both the base and
remote units are set to the same positions,
and lock the thermostats using the supplied
set screws. For reliable operation, signal
strength should be 10% or higher.
For the wireless remote thermostat please
use only double A lithium batteries.
SYSTEM CONTROLS
• Price Wireless Base Module
• Price Wireless Remote Thermostat
• A CAT5 data cable to connect the base
module to your choice of controller.
(PIC, Prodigy, etc)
• Mounting br ack et f or over head
applications and accessory basket for
Underfloor applications.
Easy Installation
PIC
Prodigy
UMC3
UMCB
The Price Wireless Thermostat System works with most Price controls including
the PIC, Prodigy, UMC3 and UMCB
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-59
System Controls
Price Wireless Thermostat Kit
Product Overview
Operation
The LCD screen on the base station displays
a wealth of useful information related to the
operation of the wireless link:
Wireless thermostat - Underfloor Ventilation
SYSTEM CONTROLS
• Signal Strength (Ranges from 0-100%)
• Battery level (Ranges from 0, indicating
dead batteries, to 5, indicating fully
charged batteries)
• Current Room temperature
• Current temperature set point
All of the above variables are available for
viewing through the BACNET Protocol as
well.
PIC
Prodigy
UMC3
UMCB
The Price Wireless Thermostat System works with most Price controls including
the PIC, Prodigy, UMC3 and UMCB
G-60
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
PRODIGY
®
SELF MODULATING DIFFUSER
The Price Prodigy® diffuser features a high-torque gear motor
for fast response, long life and reliable operation. A room
temperature sensor provides constant feedback to the
microprocessor controller located in the diffuser, enabling
precise control of the space temperature. Re-heat output
is available on the master unit and installation is made easy
with RJ-45 connectors.
BACnet compatible
Compatible with the Price
wireless thermostat
Enhances traditional
system design by
adding the element of
personal control.
Universal junction panel
on Prodigy® master
Optional IR remote
www.priceindustries.com for additional product
information, including product videos and brochures.
Personal Self-Modulating Diffusers
Prodigy® Series
Product Overview
Prodigy®
The Prodigy® self-modulating diffuser series
has been designed to address many of the
problems common to today’s conventional
HVAC systems.
DDC Personal Zone Control
SYSTEM CONTROLS
Most traditional approaches group rooms
with similar load characteristics together
to form zones. As these zones are created,
multiple work spaces are controlled by a
single thermostat. “Thermostat wars”
ensue as occupants attempt to adjust
the thermostat to their level of comfort.
Complaints from occupants who are “too
hot” or “too cold” are common. Often, the
system works at capacity to satisfy that one
occupant who represents the “worst case”
within that zone.
The Prodigy® enhances traditional system
design by adding the element of personal
control. A room temperature sensor
provides constant feedback to the
microprocessor controller located in the
diffuser, enabling precise monitoring of the
space temperature.
As room load varies, the Prodigy ®
compensates by controlling the flow
of supply air into the space. A superior
cone design maintains air performance
characteristics throughout the per­formance
range. Dif­
fus­
er response is controlled
through advanced PI control algorithms.
Modula­tion is precise and proportionate to
the require­ments of the space and occupant.
The actuator mechanism features a
high-torque, low voltage motor, which
offers immediate response that is superior
to the sluggish response and delayed action
common to thermally activated expan­sion
devices. A supply air temperature sensor
provides automatic heating / cooling
changeover. An output is available to
activate supplemental perimeter heating
devices if required.
Three models are available with con­venient
set-point adjustment at the diffuser, a wall
mounted thermostat or a handheld remote.
A BACnet interface option allows Prodigy
master units to connect to a MS/TP network.
This allows the Prodigy master to share
information with the building automation
system.
The Prodigy® Series is an
evolving product line.
Please contact your sales representative or visit our website
www.priceindustries.com
for the most current features
and accessories.
G-62
Additional Information Index
For more information on Price VAV Diffusers see Volume 1.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
VAV Diffusers
Prodigy® Series
Model Nomenclature
Prodigy® Series Model PPD1
VAV Cooling and VAV Heating
Manual Adjustment
PPD1 is suitable for cooling only applications and limited heating requirements,
including morning warm-up cycles.
•
•
•
•
Native BACnet compliant (optional).
Face mounted room temperature sensor.
Manual set-point adjustment at diffuser.
Upgradable to PPD2 or PPD3.
Prodigy® Series Model PPD2
VAV Cooling and VAV Heating
Wall Mounted T-Stat
PPD2 is suitable for applications that require dedicated heating and cooling cycles.
To more accurately sense room temper­a­ture while in the heating mode, the unit features
a wall thermostat with temp­er­a­ture sensor.
SYSTEM CONTROLS
• Native BACnet compliant (optional).
• Face mounted room temperature sensor for cooling mode.
• Setpoint adjustment at the thermostat.
• Five thermostat options for PPD2 model
- Room Sensor (Blank face)
- Dial Thermostat
- LCD Thermostat
- LCD Thermostat with motion sensor for occupancy
- Wireless Thermostat.
Note: LCD models can be used to set up variables in
Prodigy units such as BACnet address, set-point limits
and many others.
Prodigy® Series Model PPD3
VAV Cooling and VAV Heating
IR Remote Control Device (hand-held)
PPD3 is suitable for cooling only applications and limited heating requirements,
including morning warm-up cycles.
• Native BACnet compliant (optional).
• Face mounted room temperature sensor.
• Hand-held infrared remote control device for set-point adjustment.
Master
Prodigy® Series Model PPDD
Drone Unit
Drone units contain actuators and control circuitry to respond to signals from the master
unit. The damper mechanism is synchronous with the master unit. Up to five drones can
be supported by one master.
Drone 1
Additional Information Index
For more information on Price VAV Diffusers see Volume 1.
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
Drone 3
Drone 2
G-63
VAV Diffusers
Prodigy® Series
Prodigy® Temperature Measurement and Control
Supply Air Temperature Measurement
SYSTEM CONTROLS
Mounted near the 24VAC motor is a solid
state, low drift temperature sensor that
reads the supply (duct) air temperature.
This temperature reading is fed into the
DDC controller. Based on this supply air
temperature the Prodigy® will respond as
shown below:
• Supply Air Temperature (2 °F) below
Room Temperature → Prodigy is in
cooling mode
• Supply Air Temperature (2 °F) within
Room Temperature → Prodigy is in
neutral mode. Damper will go to neutral
position.
• Supply Air Temperature (2 °F) above
Room Temperature → Prodigy is in
heating mode.
Note: Reheat output (24 VAC binary) is
active in all modes.
These ranges can be user specified if the
BACnet option is selected.
Room Air Temperature Measurement
and Control
The Prodigy® PPD1 (set-point is adjusted
at a potentiometer located on the back
of the diffuser junction panel) and PPD3
(set-point is adjusted via infrared remote
control) measure the room air temperature
via a solid state, low drift temperature
sensor at the plaque. A small plastic port
allows room air to be induced toward
the sensor. This port is also used to
detect infrared signals from the remote
control. Please note the PPD1 and PPD3
models support VAV cooling and heating
based on the plaque temperature sensor.
During cooling this temperature reading
will be very representative of the actual
room temperature as the entire room is
well mixed due to the high induction
characteristics of the Prodigy® diffuser.
During heating some stratification of room
temperature will exist due to the buoyancy
of the warm air, causing a difference in
temperature reading between the plaque
sensor and the temperature in the occupied
zone. This difference will vary depending
on the supply air temperature. To correct
this temperature difference the Prodigy®
controller is programmed to calculate a
room temperature offset based on the duct
temperature reading to more accurately
determine the room temperature in the
occupied zone. For applications with
limited heating requirements, or for
morning warm up sequences the above
control strategy will provide acceptable
room temperature control. For applications
requiring significant hours of heating and
where room temperature control is critical
the PPD2 with wall mounted thermostat
would be recommended.
G-64
Prodigy® PPD2
Prodigy® DDC Controller
USB Linker
For the Prodigy ® PPD2 (set-point is
adjusted via a wall mounted thermostat),
temperature is measured at the thermostat.
This model of Prodigy® is intended for VAV
cooling and VAV heating modes. Typically,
measuring the room air temperature via
a wall mounted thermostat will provide
reliable readings independent of heating
or cooling modes.
Control
The Prodigy® series diffusers have several
different control features available to aid in
the functionality of the diffusers.The BACnet
option diffuser has the distinct ability to
control dozens of variables through the BAS.
Minimum Air Flow and Balancing
The Prodigy® has preset damper positions
and can be changed either via the LCD
thermostat or through the BACnet option.
In order to balance a unit without a LCD
thermostat remote, unplug the 24 VAC
power going to the diffuser and reconnect
the diffuser. Once the Prodigy® diffuser
calibrates the damper to fully open,
unplugging the unit will keep the damper
fully open, at which point balancing can
be done.
Additional Information Index
For more information on Price VAV
Diffusers see Volume 1.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
VAV Diffusers
Prodigy® Series
Networking
Networking
Networking allows building systems,
including the HVAC system, to share
information with each other.This information
includes set-points, room temperatures,
room loads and much more. This allows
HVAC devices to work together as a system,
resulting in:
Increased energy efficiency
o Using schedules (Day/Night/Weekend)
o Monitoring room load data
o Shutting down unoccupied zones
Control and monitoring of several
devices from a single workstation
(typically a personal computer or laptop)
• Easier troubleshooting
Networking with BACnet
Prodigy®
•
•
Electronic System
Once the Prodigy® diffusers are networked,
a software package (typically with graphics)
can be used to show any device connected
to the network. This allows for accurate
information that is both current and accurate
to be accessed by the user.
SYSTEM CONTROLS
Using the ASHRAE network standard
BACnet allows the Prodigy® to communicate
with other BACnet devices. This allows
interoperability between different devices
even if they are made by different
manufacturers. For more information on
networking and different communication
protocols please see section L of the Price
catalog.
Networking BACnet
BACnet router
Also, once networked, it is possible to
setup scheduling to shut down certain
zones during the day or at night based on
occupancy.
MS/TP Network
The Prodigy® uses the BACnet network
type MS/TP (Master Slave Token Passing),
which uses two wires in a daisy chain
configuration. This network type is based
RS-485 physical layer and is very robust
in industrial environments, while being
economical enough to be implemented
on each device.
The network connection between Prodigy®
(with BACnet option) diffusers is done with
the included plenum rated network cable.
No tools needed!
Connecting the Prodigy® diffusers with
the BACnet interface option is very simple
and efficient. Dual RJ-45 jacks on each
diffuser allow daisy chaining each device
without splitters or tools. Included with
each Prodigy diffuser is a 35 foot plenumrated network cable to simplify installation
in the field.
Local addresses can be set at each Prodigy®
diffuser using the on-board DIP switches.
The media access control (MAC) address
range is 1-99. Each device on the network
segment must have a unique address,
© Copyright Price Industries Limited 2014.
otherwise communication errors will occur.
To show proper data exchange, TX
(transmit) and RX (receive) LEDs indicate
when data is being sent and received. This
provides a visual check of how the network
is performing. For example, if the RX LED
is not blinking this could indicate a cable
is unplugged at the other end.
Standard baud rates for the BACnet MS/TP
network are 9600, 19200, 38400 and 76800.
All devices on the network segment must
be set to communicate at the same speed,
otherwise communication errors will occur.
Prodigy® Control Variables
There are several control variables that
can be monitored and/or adjusted via the
network.These include, but are not limited to:
• Room Temperature
• Room Set-point
• Supply Air Temperature
• Supply Air Temperature switch over
points (hot/cold/neutral temperatures)
• Inlet Size
• Reheat Type
• Damper Position
• Damper Target
• Model Type (PPD1,PPD2,PPD3)
• Ping (sounds the Prodigy beeper to help
you locate the unit)
• Day/Night Mode
• Cooling/Heating Load (100% auto + 100%)
These variables allow the user to determine
the current status of a zone.This information
can also be relayed to a main controller,
allowing it to calculate the total heating or
cooling loads.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-65
Price Rooftop Unit Controller
PRICE'S SECOND-GENERATION DIGITAL
ROOFTOP UNIT CONTROLLER
The new Price Rooftop Unit Controller
(PRTU) is an advanced proportional
integral (PI) digital controller that offers
state-of-the-art control of a packaged
rooftop unit. Multiple pre-programmed
and pre-tested control strategies are
available for an easy-to-install and reliable
system package.
PRTU FEATURES:
• BACnet MS/TP networking
• PI control
• Standalone and network operation
• Pre-programmed voting strategies
Networked with such Price Controls as the Price Intelligent Controller (PIC) for VAV boxes
or the Price Prodigy Smart VAV diffuser with BACnet option, this system can determine
the load of each zone and intelligently control the main packaged rooftop unit.
The PRTU is a flexible controller with several inputs
and outputs to control even the most sophisticated
rooftop package. The PRTU standard package comes
with a controller, thermostat and thermostat cable,
and is ready for standalone or network operation.
Configuration of the PRTU controller is done through
www.priceindustries.com for additional product
information, including product videos and brochures.
the backlit LCD thermostat. An optional web server
(PRTU-WEB) can provide a graphical front-end
to the user. This web server allows multiple users to
monitor the system at once and is helpful for
troubleshooting and remote diagnostics.
System Controls
Price Rooftop Unit Controller
(PRTU)
Price's 2nd generation digital rooftop
unit Controller
The new Price Rooftop Unit Controller
(PRTU) is an advanced proportional integral
(PI) digital controller that offers state of
the art control of a packaged rooftop unit.
Multiple pre-programmed and pre-tested
control strategies are available for an easy
to install and reliable system package.
Networked with PIC or Price Prodigy Smart
Diffuser (PPD), the system can determine the
load of each zone and intelligently control
the main packaged rooftop controller unit.
The PRTU has been designed to support a
large number of inputs and outputs and is
fully configurable using the LCD thermostat.
SYSTEM CONTROLS
A web server option allows graphical
monitoring and configuration using any PC
with a web browser and the Adobe flash
plug in.
Introduction
The Price Rooftop Unit Controller (PRTU) System is a reliable and technologically advanced system that provides occupant comfort and
energy savings throughout an entire facility.
System Overview
• Can interface with virtually any packaged rooftop unit including Carrier, Lennox and Trane to control the cooling, heating stages as
well as the fan operation.
• Up to 30 zones per Rooftop Controller
• Multiple inputs and outputs (both binary and analog) allow for a flexible and powerful system controller.
• Uses the ASHRAE standard BACnet for 2 way communication between the Rooftop Unit Controller and PIC zone controllers or
Prodigy smart diffuser with BACnet option.
• Optional web server provides graphical front end for customers and maintenance personnel.
VAV (Pressure Independent) Zone Control
The new PRTU is designed to communicate with the Price Intelligent Controller (PIC) to provide the customer with a complete system
package with pressure independent VAV control of each zone. The benefits of a VAV pressure independent system are tighter room
temperature control through the precise control of air flow to each zone. This will also produce energy savings since air flows will be
controlled to exactly the amount required, and there will be no overshooting.
VVT (Pressure Dependent) Zone Control
The new PRTU can also function with the Prodigy Smart Diffuser to provide the customer with excellent zone control.
G-68
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Price Rooftop Unit Controller (PRTU)
Networked Zone Controllers
The PRTU works with either the pressure
independent PIC or the pressure dependent
Price Prodigy Smart Diffuser (PPD). Both
of these zone controllers offer excellent
local air flow control and several options
for reheat and heating/cooling changeover.
Room Sensor Thermostat (PIC-TSSENS)
This economical model of thermostat
measures room temperature. The set-point
can be set from a hidden dial on the back
of theT-Stat, through free setup software, or
through a BACnet system. This eliminates
the problem of unauthorized tampering
without the need for visually unappealing
thermostat lock boxes.
Dial Thermostat (PIC-TS-DIAL)
This model measures room temperature
and features a dial adjustment and an
occupancy button. Temperature set-point
limits are set through software/BACnet.
LCD Thermostat (PIC-TS-LCD)
This model measures room temperature and
features an LCD screen with an advanced
menu structure and three pushbuttons.
Temperature set-point limits are set through
software/BACnet.
Balancing and modification to the controller
setup can be accomplished from the LCD
screen.
LCD Thermostat with Motion Sensor
(PIC-TS-MOTION)
This model possesses the same features as
the LCDT-Stat with the addition of a passive
infrared motion sensor. The motion sensor
allows for automatic detection of space
occupancy and therefore can save energy by
shutting down during unoccupied periods.
Price Wireless Thermostat
The Price Wireless Thermostat System
provides both sensor inputs and a point
of control for Price controllers. The Dial
thermostat can be mounted in any location
and needs no wiring. This makes it ideal for
glass offices and cubicles.
© Copyright Price Industries Limited 2014.
PIC
Prodigy Smart Diffuser with BACnet option
SYSTEM CONTROLS
The PRTU polls the networked zone
controllers for current load information.
To accomplish this the PRTU is networked
with the zone controllers using BACnet
MS/TP, which is a simple 2-wire system.
All controllers on the network must have
a unique address and run at the same
baud rate/network speed. The network
is daisy chained from unit to unit. Please
note that when ordering the PIC or Prodigy
Zone controllers that the BACnet option/
module must be selected to order to allow
communication with the PRTU unit.
The PIC and Prodigy Zone Controllers are available with a wide range of
thermostat options for any application.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-69
System Controls
Price Rooftop Unit Controller (PRTU)
SYSTEM CONTROLS
Energy Saving Features of the PRTU
1.Scheduling/Calendaring
• Scheduling allows the system to shut down during unoccupied times when cooling or heating are not required. The on board
motion sensor can trigger automatic occupancy during scheduled "off hours". This ensures comfort for people working weekends/
etc. If using the motion sensor feature, please ensure the thermostat is located in a common area, such as a main hallway, so it
can detect people.
2.Occupancy Control
• Multiple occupancy control options including:
• Scheduled occupancy control (at PRTU).
• Rooftop PRTU schedule override via motion sensor or BACnet netwoerk.
3.Economizer Operations (Typically supplied by rooftop manufacturer)
• Using the outside air temperature sensor the rooftop will determine the percentage of outside air to use.
• This will optimize cooling by using outside air for cooling when temperatures are within the cooling air temperature range, thus
saving money on cooling re-circulated air.
• When supplied by manufacturer, the cooling signal from PRTU is intercepted and used to engage the Economizer module.
4.Optimized Staging (Proportional integral control)
• Suspends second stage cooling or heating when the first stage continues to meet space temperature requirements.
• Eliminates Offset Error.
5.Equipment Safety Timers
• Programs a minimum off and minimum on time for the compressor to ensure that it does not cycle on and off too rapidly thus
damaging the compressor.
6. Temperature Sensors
• The PRTU supports multiple temperature sensor inputs. Discharge Air Temperature (D.A.T.) provides feedback to the PRTU.
Using this information the PRTU can modulate the stages of heating and cooling to ensure the discharge air does not exceed the
(adjustable) limits. This helps prevent unnecessary icing up of coils or tripping of high limits, which decreases system up time.
• Similar to D.A.T. another temperature input is Return Air Temperature (R.A.T.) This provides feedback to the PRTU about the
return duct air temperature. Again if the temperature is too hot/cold the PRTU can temporarily disable the cooling/heating stages
to prevent tripping a safety limit.
• These temperature probes help ensure the rooftop is running correctly, efficiently and helps increase the overall up time of the
system, resulting in less service calls and increased occupant comfort.
10k thermistor for temperature measurement
G-70
PRTU system
with discharge
and return air
temperature
probes
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Price Rooftop Unit Controller (PRTU)
PRTU Modes (Standalone and Networked)
Standalone Mode
Networked Mode - Average Polling
Networked Mode - Non Majority polling
In this mode the PRTU will control
the packaged RTU based on the local
temperature conditions as measured at the
PRTU thermostat.
In networked mode the PRTU will poll up
to 30 zone controllers (Price Intelligent
Controller and/or PIC or Prodigy Smart
Diffusers). The number of zones polled
must be set in the field. The PRTU will
poll the requested zones every 3 minutes.
Data polled is room temperature and room
setpoint.
Non majority favours one of the 3 modes.
Useful for:
On an decrease in space temperature into
the heating proportional band the PRTU will
progressively engage stages of heating (up
to 4) in the packaged rooftop unit. On an
decrease of space temperature greater than
the heating proportional band, all active
heating stages will be energized. As the
space temperature approaches the heating
setpoint, the PRTU will de-energize active
heating stages.
Separate heating and cooling setpoints,
along with adjustable changeover timers
prevent system cycling between heating
and cooling modes. Heating and cooling
setpoints are separated by a default value
of 4F (2C).
Using the two included 10k thermistor
probes (Type J), the PRTU will monitor the
air temperature as it is discharged (D.A.T.
- measured on AI1) and returned (R.A.T measured on AI2) to the rooftop unit.
If either of the air temperatures exceed the
adjustable limits, active heating and cooling
stages are de-energized to prevent low or
high temperature lockouts in the packaged
rooftop unit.
In average polling mode the majority
demand wins and the RTU will be controlled
using that information.
Example: Cooling - 50%, Heat - 40%, Neutral
- 10% = Cooling Wins.
Avg - spring/fall
Cooling - summer
Each zone can be weighted. The default is 1.
To add more weight to a zone. (example: a
large meeting room, or VIP room) increase
the weight. Increasing the weight to 3 would
give that zone 3 votes instead of 1.
Heating - winter
To disable a zone set polling to 0.This is ideal
for a zone which is poorly supplied and is
influencing the system in a non-ideal way.
PRTU - Stat
Up/Down buttons
Allow adjustment of stand alone setpoint
and menu configurations.
Menu button
Allows selection of info menu. Hold for 5
seconds to enter SERVICE mode.
System mode button
Default - Automatic change over mode
Cooling mode only
Heating mode only
Ventilation/Fan only
Off
This button is protected by default (requires
passcode). However can be unlocked for
user adjustment.
Time button
Allows setting of real time clock and
calendar.
Adjustable minimum on/off times prevent
short cycling of outputs.
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-71
SYSTEM CONTROLS
On an increase in space temperature into
the cooling proportional band the PRTU will
progressively engage stages of cooling (up
to 4) in the packaged rooftop unit. On an
increase of space temperature greater than
the cooling proportional band, all active
cooling stages will be energized. As the
space temperature approaches the cooling
setpoint, the PRTU will de-energize active
cooling stages.
• Heat/cool changeover systems WITH
reheat at zones (favour cooling)
• Summer: Favour Cooling
• Winter: Favour heating
PRTU can be set to switch strategies
automatically on season change via the
real time clock and calendar. This must be
setup in the field.
System Controls
Price Rooftop Unit Controller (PRTU)
Features
The PRTU Thermostat provides:
PRTU System Thermostat
SYSTEM CONTROLS
• Backlit easy to read LCD display.
• 5 push buttons for controlling functions
and accessing menus.
• Occupancy control and schedule
override.
• 2 way communication with each PIC zone
controller or Prodigy smart diffusers
using BACnet strategy communication
protocol.
• Built in software timer to prevent fast
cycling of outputs (safeties).
• Password protected menus to prevent
certain users from accessing restricted
functions.
• Includes motion sensor for automatic
occupancy.
The PRTU:
• Microprocessor control of all inputs and
outputs.
• Inputs that accept 0-10VDC, 10k
Thermistor signals.
• 24 VAC switched outputs at 0.5 amps
each.
• All zones communicate with PRTU via
communication.
• Programmable safeties to prevent
outputs from cycling too fast.
• Indicator LED's show status of each
output including, ON/OFF/Fault.
• Outputs switchable between 24 VAC
HOT and COMMON
• All outputs protected from short circuit
and overload via thermal fuse
Outputs
• 10 Binary Outputs
• 4 Analog Outputs
Inputs
• 6 thermistor
• 6 0-10 VDC
• 2 binary inputs (contact closure)
Indicator LEDs
•
PRTU
Show status of all outputs.
Green = ON
Red = Fault
Yellow = Overridden
G-72
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Price Rooftop Unit Controller (PRTU)
Features
The PIC zone controller provides:
Zone Controllers (PIC – Price Intelligent Controller)
SYSTEM CONTROLS
• VAV damper controller with high
accuracy, low drift air flow sensor.
• Controller capable of controlling 3 stages of heat, hot water valves or
analog reheat depending on control
sequence selected.
• Controls capable of controlling heating
– cooling changeover, night setback,
morning-warm up, and various other
sequences.
• Several thermostat options are available
with the PIC, including BLANK sensor,
Dial, LCD, LCD with Motion and Wireless.
• Set-point adjustment, and service
mode with balancing and air flow
factor adjustments can be done directly
from LCD thermostat or via thermostat
service port.
The Bypass Damper (Pressure Control,
Valve-PCV) provides:
Bypass Damper
• VAV damper controller, static pressure
transducer and low leakage damper
assembly.
• Ability to field adjust required static
pressure.
• A static pressure tube installed in the
supply air duct 2/3 down the longest
run.
• Networked and standalone options
available.
• Constant pressure bypass sequence
number: 1550 uses PIC controller.
• Also available is PIC sequence 1551
which regulates downstream pressure.
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-73
System Controls
Price Rooftop Unit Controller (PRTU)
System Layout – PRTU
BACnet MS/TP Networking with Zone Controllers (PIC and/or Prodigy)
Rooftop
Electrical
Enclosure
SYSTEM CONTROLS
Bypass
Damper
PRTU
(Mounted
in Plenum)
Static Pressure
Sensor
PIC
Zone Controller
or Prodigy Smart Diffuser w/BACnet
PRTU-Stat
*For specific wiring information see the PRTU Service & Installation Manual – Available at www.priceindustries.com
The illustration above shows a typical PRTU system.
• Here a series of zones are controlled using thermostats to regulate VAV dampers, and thus regulate the air flow to the corresponding
zone. (Note: The can also support fan powered terminals with reheat).
• Each zone controller is daisy-chained together and then to the PRTU, allowing them all to appear on the BACnet network.
• Since they are all on the network the rooftop controller has the ability to take a poll, using one of the pre-programmed voting
methond.
• The PRTU is then wired to the PRTU-Stat. The PRTU will send the controller signals to the rooftop units electrical enclosure where it
will operate the rooftop unit by turning on and off the fan, cooling and heating coils, and any other options that are available to the
rooftop.
• The PRTU must be mounted in the ceiling plenum and not in the rooftop unit itself. The PRTU is not rated for the temperature
extremes that occur outdoors.
G-74
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Price Rooftop Unit Controller (PRTU)
System Layout – PRTU with graphical Web Server option
BACnet MS/TP Networking with Zone Controllers (PIC and/or Prodigy)
Rooftop
Electrical
Enclosure
SYSTEM CONTROLS
Bypass
Damper
Static Pressure
Sensor
PRTU
(Mounted
in Plenum)
PIC Zone
Controller or Prodigy
Smart Diffuser w/BACnet
PRTU-Stat
PRTU-BAC-RTR
(BACnet Router)
PRTU-WEB
(web server)
WAN Port connects
to building LAN
PRTU-IP-RTR
(IP Router)
*For specific wiring information see the PRTU Service & Installation Manual – Available at www.priceindustries.com
The above illustration is for a typical PRTU. This system offers BACnet networking, but now with the optional graphical web server
package (WEB-MASTER). This allows customers to view the entire system via a web browser with Adobe Flash. Using the graphical
interface users can monitor and edit variables in the PRTU and Zone controllers. This allows for easy setup and monitoring. The web
server is pre-loaded with graphics for typical rooftop units and zone controllers. On site the installer must discover and link the found
devices into the graphical web page.
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-75
System Controls
Price Rooftop Unit Controller (PRTU)
System Layout – PRTU w/graphical Web Server / Multiple Units
BACnet MS/TP Networking with Zone Controllers (PIC and/or Prodigy)
Rooftop
Electrical
Enclosure
Static
Pressure
Sensor
SYSTEM CONTROLS
PRTU
(Mounted
in Plenum)
Bypass
Damper
PIC Zone Controller
or Prodigy Smart
Diffuser w/BACnet
PRTU-Stat
PRTU-BAC-RTR
(BACnet Router)
PRTU-IP-RTR
(IP Router)
WAN Port connects
to building LAN
Rooftop
Electrical
Enclosure
Static
Pressure
Sensor
PRTU
(Mounted
in Plenum)
PRTU-Stat
PRTU-WEB
(web server)
Bypass
Damper
PIC Zone Controller
or Prodigy Smart
Diffuser w/BACnet
Note: Laptop with Web
Browser used for setting up the
PRTU-IP-RTR and PRTU-WEB
locally. After setup is complete,
devices can be accessed
using any computer with web
browser on builiding LAN.
PRTU-BAC-RTR
(BACnet Router)
*For specific wiring information see the PRTU Service & Installation Manual – Available at www.priceindustries.com
The above illustration is for a multiple PRTU installation with BACnet networking and optional graphical web server (PRTU-WEB). The
main system is setup with a PRTU and WEB-MASTER package. An additional PRTU with WEB-ADDITIONAL is shown connected along
with an installers laptop.
Up to 3 PRTU's can be connected to the IP router (PRTU-IP-RTR) directly. Even more systems can be added by using an IP Switch (PRTUIP-SWITCH) to add more ports for BACnet routers (PRTU-BAC-RTR).
Using the graphical interface users can monitor and edit variables in the PRTU and Zone Controllers. This allows for easy setup and
monitoring. The web server is pre-loaded with graphics for typical rooftop units and Price zone controllers. On site the installer must
discover and link the found devices into the graphical web page.
G-76
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Price Rooftop Unit Controller (PRTU)
Rooftop Control Packages
Price Rooftop Unit Controller Typical Package
Offers rooftop control capabilities such as:
• Scheduling and Auto Occupancy with
Motion Sensor
• Rooftop and Zone Occupancy Control
• Zone Demand Polling Strategies
Also allows individual Variable Air Volume
(VAV) zone control by means of the Price
Intelligent Controller (PIC). By using the Price
Intelligent Controller (PIC) to control the
zones this package will allow the buildings
to be completely networked, allowing the
rooftop unit to make demand polls of the
zones to determine what mode of operation
the rooftop should be in.
PRTU
PRTU System Thermostat
SYSTEM CONTROLS
The package includes the following components:
Qty: 1
PRTU
Price Rooftop Unit Controller
Qty: 1
PRTU-STAT
PRTU System Thermostat
Qty: 1
NETc35
Thermostat Cable (35 feet)
Qty: 2
PRB
Temperature probes (1 for D.A.T. 1 for R.A.T.)
Price Rooftop Unit Controller with graphical Web Server
PRTU with graphical web server provides
a more advanced system package. The
web server provides remote monitoring
and configuration plus trend logging of
variables.
The package allows the user to view the
network through the web server provided
by Price. This web server is available with
a Windows explorer type interface or an
optional custom designed Graphical User
Interface which allows the user to view all
status variables like room temperatures,
humidity levels, air flows, etc for every
zone controller on the network, as well as
change temperature and air flow set-points
right from the PC.
PRTU-WEB (Web Server)
The web server uses a ethernet connection between the designated PC and the web server. The components provided by Price are:
Qty: 1
Qty: 1
Qty: 1
Qty: 2
Qty: 1
PRTU
PRTU-STAT
NETc35
PRB
WEB-MASTER
Price Rooftop Unit Controller
PRTU System Thermostat
Thermostat Cable (35 feet)
Temperature probes (1 for D.A.T. 1 for R.A.T.)
Includes web server, IP system router, BACnet MS/TP Router
(Each building will need 1 WEB-MASTER, additional PRTU systems in same building will require WEB-ADDITIONAL to be added to the
web server)
Qty: 1
WEB-ADDITIONAL
© Copyright Price Industries Limited 2014.
Including BACnet MS/TP Router to connect in with existing WEB-MASTER
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-77
System Controls
Price Rooftop Unit Controller (PRTU)
SYSTEM CONTROLS
Price Rooftop Unit Controller – Web – (PRTU-WEB)
The PRTU-WEB(web server) is a new solu­
tion that provides access to the new Price
Rooftop Unit controls via a web browser
interface. Using standard web browsers
such as Internet Explorer, Google Chrome
and Firefox allows multiple users access to
the graphics and controls. The PRTU Front
End system uses BACnet IP to communicate
with MS/TP devices through a router. Points
can be discovered and linked to high quality
pre-loaded graphic templates. This allows
for quick and consistent graphic creation
User access levels can be setup to be simple
“read only” to full control allowing the
creation and editing of graphics.
Key Features
• Standard Web-Master package includes:
IP router, BACnet router and Web Server
• Access via any web browser with free
ADOBE FLASH plug in installed
• No software or USB keys
• BACnet IP support
• High resolution graphics
• Multiple users with separate access
levels
• Email support for alarms
PRTU – Web – (Web Server)
Bacnet points are easy to adjust with the graphical interface
A drop down list shows BACnet points
for each device. Most points can be
modified via the interface
Graphical User Interface for Rooftop Monitoring and Control
G-78
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Price Rooftop Unit Controller
System Design
SYSTEM CONTROLS
For an average building located in North America during the winter
months the amount of sun that the south and east sides of the
building receive is larger than for the north and west. The heat
load supplied by the sun for a typical building might look like the
illustration to the right, with the sun warming the south and east
zones five to eight. Meanwhile, the north facing zones are receiving
no additional heating from sunlight thereby causing those zones
to become cooler than usual.
Since we are considering the zone as a whole a better representation
may be the illustration to the right which shows the north zones
to be completely cold and the south and east zones to be warmer
that usual. Zone four is shown to remain relatively unaffected by
the sun's location.
Under these conditions the following is required:
• Zones one to three require heating
• Zone four is satisfied
• Zones five to eight require cooling
Right away it is obvious that there is a problem. How can one rooftop
provide both heating and cooling at the same time to satisfy every
zone's needs?
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-79
System Controls
Price Rooftop Unit Controller
System Design
Rooftop Control with Polling Strategies only
In this situation, if one were to rely simply on the polling methods, problems may arise. Since there are four zones that require cooling
due to the additional sunlight and three zones that require heat due to the lack of sunlight, a typical rooftop unit would go into a cooling
mode and supply 55° air. This would be fine for zones five to eight but will not help zones one to three as their dampers will close to
the min cooling flow positions.
With Weighted and Averaged Polling the design improves by controlling the rooftop unit to operate in the mode which is required the
most. In other words, if zones five to eight only need a little cooling and zones one to three need a lot of heating, they will get their
heating. However, some zones still go unsatisfied and this is often the method of choice, since it provides the best representation of the
building's needs rather than one local rooftop.
Rooftop Control with Polling and Secondary Strategies
Using additional methods of control in conjunction with the polling strategies will help to combat these problems. With methods like
room temperature limiting or heat/cool cycling the rooftop unit will switch from the poll majority operation to satisfy zones that have
been allowed to drop below safe set-points or have been demanding heat for a predetermined amount of time, however, this method
is not necessarily the most energy efficient.
SYSTEM CONTROLS
Heating/Cooling Cycling
In this example zones one to three have been requesting heat for
1 hr while the majority of zones still require cooling. With heat/cool
cycling the rooftop controller will switch to heating mode to satisfy
zones one to three. Zone dampers in zones five to eight will close
to the minimum air flows, which may not be zero. That combined
with the fact that the zones are receiving extra sunlight will increase
the room temperatures.
Depending on how fast the demand is met in zones one to three this
could be a permanent solution, switching from cooling to heating
every hour. This way everyone will have a satisfied room condition
at some point during the day.
Duct Heater Stations
Combined with the polling methods, duct heater stations are a way
to provide optimum comfort for all spaces. In this example the same
three north facing rooms are below the desired set-point and are
calling for heat. Since zones five to eight represent the majority
and are calling for cooling, the rooftop unit will supply cooling, and
dampers for zones one to three will modulate to a minimum. With
duct heater stations the three zones requiring heating can receive
the heat they need by energizing an electric coil located upstream
of the three zones. Now all the zones in the space will be satisfied.
Other reheat types include:
• Radiant Panels
• Perimeter Radiation
G-80
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Price Rooftop Unit Controller
Networking
• Increased energy efficiency
o Using schedules (Day/Night Weekend)
o Monitoring room load data
o Shutting down unoccupied zones
• Control and monitoring of several devices from a workstation (typically a personal computer or laptop)
• Easier troubleshooting
Communication Language (Protocol)
In order for devices to communicate with
each other a common communication
language must be used. There are several
communication languages available
for building automation systems (BAS).
However this is not a good thing. Multiple
communication protocols in a single building
mean no devices can communicate or share
information with each other since they don’t
speak the same language. Because of this
no software or hardware tools can work with
all products. It’s like needing a different TV
for every channel you want to watch.
© Copyright Price Industries Limited 2014.
Open Communication
versus Proprietary
Protocol
There are several proprietary communication
protocols still in use. However a proprietary
communication protocol cannot interface
with another manufacturer’s device
without considerable effort and cooperation
between the manufacturers. Since there is
no public information on the protocol used
this reduces the chances of interoperability.
With a proprietary system devices can
now no longer work together and separate
networks, software tools and computers
must be used, resulting in additional setup
and maintenance costs for the end user.
An open communication protocol means
that public information is available so
that any manufacturer can implement that
specific protocol. Since the protocol is open
manufacturers can implement it on a variety
of devices including HVAC, lighting, security
and other building systems.
Since one manufacturer may not be able
to provide all the devices and/or solutions
for a single job, an open communication
protocol would allow different devices
to be networked and share information.
An example of this would be a packaged
rooftop controller sending information to
a variable frequency drive (VFD) on the
same communication network. An example
of an open communication protocol is the
ASHRAE standard BACnet.
BACnet and LONmark
To address this problem a standard protocol
must be used. Two main protocols have
emerged: BACnet and LONmark. These
protocols have been standardized and can
be implemented by any manufacturer who
wants to support them.
Price has chosen the BACnet standard for
its products since it has many benefits over
LONmark and is supported by ASHRAE.
Some of the benefits of BACnet include:
• Low cost hardware allows networking
almost any device
• Supports multiple LAN technologies
(Ethernet/MSTP)
• BACnet is an ANSI/ASHRAE standard
All networked Price products use the
BACnet standard for communication,
meaning all products will work together as
a system without any special programming
or protocol converters (gateways). This
ensures reliable operation in the field and
allows the building owner to expand their
system around a standard communication
protocol.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-81
SYSTEM CONTROLS
Networking allows HVAC devices to share
information with each other such as setpoints, room temperatures, room loads
and much more. This allows HVAC devices
to work together as a system resulting in:
System Controls
Price Rooftop Unit Controller
Protocol Converter
SYSTEM CONTROLS
A protocol converter acts as a language
translator for two different networks. The
protocol converter basically 'bridges' two
networks so data can flow between them.
Depending on the type of job a protocol
converter may or may not be the answer,
when attempting to integrate systems with
different protocols.
Protocol Converter Benefits
Protocol Converter Limitations
• provides connectivity that may
otherwise be impossible
• may expand options for competitive
bidding
• permits interconnection of legacy
systems with newer products
• limited capacity and expandability
• limited ability to translate dissimilar
concepts
• configuration and programming of
devices through the gateway is
generally not possible
• failure results in communication
loss between all devices on opposite
sides of the gateway
• possible time delay or the return of
cached data that is old
• cost of protocol converter not feasible
for a small system add-on
While the protocol converter can be
a solution there are still many things
to consider. The key point is that the
advantages and disadvantages must be
weighed for each job.
Wiring
G-82
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Price Room Pressure Monitor
(PRPM)
Product Overview
Models
Price Room Pressure MonitorPRPM
Room Pressure Monitor
The Price Room Pressure Monitor
(PRPM) is a cutting-edge solution for
monitoring low pressure critical spaces such
as isolation and operating rooms. Factory
calibrated, the PRPM can support positive
or negative isolation rooms. A binary input,
used for delaying the alarm during room
servicing, is available for door switches,
and options are available for supporting
an anteroom and remote nurses’ station.
The Price Room Pressure Interface (RPI)
mounts vertically on the wall to a standard
electrical box and has a two-line LCD
screen for displaying real-time pressure
measurements. The LCD screen also allows
for local configuration of alarms and other
settings (all menus are password protected).
PRPM Features
• Easy-to-read backlit two-line LCD screen.
• Support for displaying inches of water
or Pascal.
• Two large LED bars for full 180 degree
viewing of room status (multiple colors
and brightness levels can be selected).
• Interface casing with anti-bacterial
plastic, which inhibits the growth of
mold.
NS Features
Room Pressure Interface
SYSTEM CONTROLS
• High accuracy and zero maintenance
sensor – error proof connection with
included RJ12 cable.
• Resolution to .001 in. w.g. (0.25 Pa ).
• Support for anteroom using same
monitor.
• Native BACnet MS/TP connectivity for
interfacing with BMS systems.
• Monitor mounted in white-powdercoated, ETL-certified enclosure with
transformer and disconnect switch.
• Multi-stage surge protection and fuse
for protection against lightning strikes.
RPI Features
Remote Nurses Station
• Multiple options for nurses’ station.
• Audible alarm with mute/acknowledge;
green and red LEDs show current status
of room.
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-83
Fan Powered Terminal Units
FPV, FDV Series
Variable Volume Parallel Flow
Product Information
The PIC-MB control package is an industry
is an industry first standard terminal unit
and controls package designed specifically
for displacement and reliable discharge
air temperature control that is achieved by
mixing return air with primary air.
FDV with PIC-MB Package
The Price Intelligent Controller for Mixing
Boxes (PIC-MB) comes with the following
standard features:
• Standard
sequences
displacement
ventilation
• Constant temperature discharge control for
higher SAT applications (field adjustable)
• Stand-alone or BACnet network operation
(with the optional BACnet expansion
module)
SYSTEM CONTROLS
• A range of thermostat options from a
room sensor thermostat up to a motion
controlled LCD thermostat
• Service port on all thermostat modules,
allowing a computer interface (using the
Price Linker2) for setup and balancing
• Fast and error proof RJ-45 thermostat
connections for thermostat and BACnet
connections
• LEDs on the circuit board to indicate the
status of all outputs
• Adjustment of sequence parameters,
settings, and balancing possible from the
password=protected service menu of LCD
thermostats
• 24 VAC binary outputs, field switchable
between hot and common
• Analog
(0-10 VDC)
outputs,
fully
configurable for heating, cooling, fan, and
auxiliary devices
G-84
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
Underfloor Controls
UMC1 Series
Product Information
Models
Underfloor Modulating Controller UMC1
The Price Underfloor Modulating Controller
will power and control up to 12 remote
terminal devices, controlling the amount
of airflow that enters each zone.
UMC1
Features
SYSTEM CONTROLS
• 50 VA Class 2 Transformer.
• 2 RJ12 Output jacks used to convey
power and the control signal to the 12
remote terminals.
• C25 plenum rated cable provided with
each remote terminal.
• Plug and play connections for easy
installation.
Note: Max 6 units per Jack
Product Information Index
Suggested Specification................... I137
© Copyright Price Industries Limited 2014.
✓ Product Selection Checklist
1] Select input signal (0-10 VDC or Price dial thermostat).
2] Select transformer voltage.
Example: UMC1/ PCT-VVT / 115
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-85
Underfloor Controls
UMC3 Series
Product Information
Models
Underfloor Modulating Controller 3 with
BACnet UMC3
The Price UMC3 with BACnet can control up
to 30 remote terminal devices, such as RFBs,
LFGs and DBVs, controlling the amount of
air flow that enters each zone based on a
control signal. The UMC3 features native
BACnet connectivity and is therefore able
to be networked to a BAS through easy plugn-play connections.The UMC3 also features
damper status lights as well as line overload
indication to assist the installer.
SYSTEM CONTROLS
Features:
• BACnet network capabilities that allow
the UMC3 to be networked to a BAS.
• 5 RJ12 Output jacks used to convey
power and control signal to 30 DBV or
RFB remote terminals
• 2 RJ45 Output jacks used to convey
power and control signal to 12 LFGH
remote terminals
• Plug and play connections for easy
installation
• 96 VA Class 2 Transformer
• Damper status lights (Yellow LEDs)
• Line Overload Indicator LEDs for each
output jack
• 5 new Thermostat options (Room
Sensor, Dial, LCD, LCD with Motion
Sensor, and Wireless).
Note: Max 6 units per Jack
Additional Information Index
For more information on Price
Underfloor Controls and other
underfloor options, see Section I.
Product Information Index
Suggested Specification................... I137
G-86
✓ Product Selection Checklist
1] Select input signal.
2] Select transformer voltage.
Example: UMC3 / PIC-TS-LCD / 115
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
Underfloor Controls
UMCB Series
Product Information
Models
Underfloor Modulating Controller Box
Control with BACnetUMCB
The Price UMCB is used to control the FDBU
(Fan Powered Booster Unit), and up to 12
remote terminal dampers. By supplying the
UMCB complete with a Price thermostat, the
UMCB will control the Fan operation (On/Off
for standard motors, Speed Modulation for
ECM motors) as well as electric heat based
on the thermostat's signal. A Building
Automation System (BAS) can also be used
instead of a thermostat as an input for the
UMCB through plug and play connections
as this controller has BACnet capabilities.
Features
SYSTEM CONTROLS
• BACnet network capabilities that allow
the UMCB to be networked through
user-friendly plug and play connections.
• 19 terminal block connections capable
of output signals such as cooling and
heating control, ECM fan motor control,
fan relay, reheat (binary, analog, and
tristate), etc.
• On-board ECM Motor controller
• 2 thermistor and 1 sensor connections
that can be used for humidity or
pressure sensing.
• 2 RJ12 Output jacks used to convey
power and control signal to 12 remote
terminals.
• 2 RJ45 jacks for network connection
• 4 new Price Thermostat options (Room
Sensor, Dial, LCD and LCD with Motion
Sensor).
UMCB Terminal Board Designation
Additional Information Index
For more information on Price
Underfloor Controls and other
underfloor options, see Section I.
Product Information Index
Suggested Specification................... I138
© Copyright Price Industries Limited 2014.
HOT - 24 VAC HOT
AO4 - ANALOG OUTPUT 3
COM - COMMON
BO1 - BINARY STAGE 1 OUTPUT 1
AI1 - ANALOG INPUT 1
BO2 - BINARY STAGE 2 OUTPUT 2
AI2 - ANALOG INPUT 2
BO3 - BINARY STAGE 3 OUTPUT 3
AI3 - ANALOG INPUT 3
BO4 - FAN RELAY
COM - COM
BO5 - BINARY OUTPUT 4
AO1 - ANALOG OUPUT (0-10 VDC) 1
COM - COMMON
AO2 - ANALOG HEAT OUTPUT (0-10VDC)
HOT - 24 VAC HOT
AO3 - ANALOG OUTPUT 2
✓ Product Selection Checklist
1] Select input signal.
2] Select sensors based on sequence.
Example: UMCB / PIC-TS-LCD
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-87
Underfloor Controls
UMCB Series
UMCB Sensors
Price Air Temperature Sensor
The Price Temperature Sensor is a precision integrated-circuit
temperature sensor with guaranteed 1.0 °F accuracy. It is a low self
heating sensor, with less than 0.2 °F of self induced temperature in
still air for accurate, repeatable temperature measurement.
Price Air Temperature Sensor
Price Humidity Sensor
The Price Humidity Sensor used with the UMCB is a small
dedicated humidity transducer, designed for long term stability
and is unaffected by water immersion.This high reliability humidity
sensor has little dependence on temperature and is calibrated to
be accurate to ± 2% RH at 55% RH.
Price Humidity Sensor
Price Pressure Sensor
SYSTEM CONTROLS
The Price Pressure Sensor is an accurate, low drift differential
pressure transducer, designed for underfloor applications. This
precision sensor is accurate to .0025 in. w.c. and is good for
pressures up to .25 in. w.c.
Price Pressure Sensor
Typical Applications
1.Cooling
• Supplying cool conditioned air (typically 62-65 °F) to the
space, from the pressurized floor plenum to the space
through floor diffusers.
• The amount of air supplied can be controlled by modulating
dampers, by controlling the speed of booster unit fans, or by
controlling the pressure in the floor plenum.
2.Auxiliary Heat
• A method of supplying warm air to a space when room
temperatures drop below desired set-points.
• Types include, hot water coils, perimeter radiation, radiant
panels, or electric coils.
3.Re-circulated Heat
• A possible alternative to reheat coils, however it can be used
in conjunction with them.
• Draws warm air in from warm interior zones and discharges
into cold exterior zones.
4.Night Setback / Occupancy Control
• A method of saving energy by changing the room set-points
overnight, the cooling set-point is increased so that the
system is not supplying cool air during periods when the
space is unoccupied.
• The heating set-point is decreased so the space temperature
is allowed to get lower than usual; this reduces the amount of
heat required during unoccupied hours, thereby saving energy.
5.Morning Warm-Up/Cool-Down
• Often used in conjunction with night setback this technique
is used to bring space temperatures back to acceptable levels
before occupants arrive in the morning.
• Warm air is supplied to all zones for a pre-determined amount
of time in the morning. With an Underfloor Air Distribution
System, it is rare that warm air is supplied through the plenum
space in a pressurized system. Morning warmup is generally
accomplished by using the heating coils on the underfloor
terminals or by a ducted air supply to perimeter zones from a
rooftop or air handler.
• In underfloor applications it might be desired to cool down
the slab in the pressurized plenum using cool night air to
eliminate any thermal loading from the previous day.
6.Pressure Control
• In this control strategy a pressure transducer is used to
measure the relative plenum pressure at all times.
• The UMCB signals the fan motor to increase or decrease its
speed in an effort to maintain the plenum pressure.
Wiring
The UMCB is factory wired to transformer, fan and heat connections. Connections to RFBs, LFGs and the thermostat are made during
installation in the field. To ensure reliable operation, a plenum rated CAT5 cable is included with the Price thermostat. The RJ45 plug
make a fast, error proof and reliable connection. The C25 plenum cable should be used for connection to LFGs and RFBs.
G-88
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
SCR Controller
SILICON CONTROLLED RECTIFIER
Acts like an electronic
switch that turns on and off
large amounts of power to
the load (heater).
The Price SCR controller provides proportional modulation
at the heater over its full operating range, which ensures
reliable, efficient and silent operation. This controller uses a
zero crossing feature that allows for a soft start of the
electronic load, which eliminates power surges.
Factory or field installable optional
discharge air temperature (DAT) probe
for limiting discharge air temperature
Large, finned aluminum heat-sink
provides optimal heat dissipation
Avoids overshooting and undershooting,
which reduces operation costs and
improves occupant comfort
www.priceindustries.com for additional product
information, including product videos and brochures.
System Controls
Electronic Heating Controls
Electronic Heating Controls
Staged or Binary Control
Staged heat is the most economical and
simplest type of heat available. The binary
(on/off) signal is used to close contactors
to energize each stage individually. Binary
heat is not the most energy efficient or
comfortable way to control reheat as it can
cause swings in room temperature.
Heating Cycle of ON/OFF Control Mode
SCR
The SCR (Silicon Controlled Rectifier) option
provides proportional modulation at the
heater over its full operating range. Solid
state electronics ensure reliable efficient,
and silent operation.
Heating Cycle with Time Proportional Control (SCR)
SYSTEM CONTROLS
Benefits of SCR
• Time proportional control of the duct
heater maintains room set-points
more accurately than on/off or staged
systems, providing maximum comfort
in the space.
• Energy Efficient – Because room setpoints are accurately maintained,
undershoot and overshoot is avoided,
reducing operating costs.
• Mechanical contactors are eliminated.
Zero cross switching of the thyristor
prevents electrical noise.
• Silent Operation – Solid state switching
of the coil elements eliminates noisy
contactors or the requirement for more
costly mercury contactors.
• SCR accepts a variety of industry
standard inputs - 0-10 VDC, 4-20mA, 24
VAC (steady or pulse).
Price Silicon Controlled Rectifier
(SCR) 3-Phase 45 amp model shown
with optional DAT probe
Price Silicon Controlled Rectifier
(SCR) 3-Phase 10 amp model shown
SCR with Discharge Air Temperature
(DAT) option
All Price SCR's have the option of adding a
discharge air temperature (DAT) probe. This
DAT probe provides the SCR with feedback
on the air temperature being providing to the
space. In order to prevent stratification of
warm air its important to limit the maximum
discharge temperature.
Benefits of Electronic
Air Flow Sensor
When the optional DAT probe is provided
with the SCR, it must be field mounted in
the duct work downstream from the heater.
Price recommends mounting the probe at
least 2 feet downstream from the heater.
Using the on board dial of the SCR allows
the installer to select anywhere in the range
of 65F - 130F. ASHRAE recommends the
heating air temperature does not exceed
15F above the room temperature. Therefore
a DAT setting of approximately 90F is
recommended for typical applications.
On a call for heat (with the DAT probe
connected) the SCR will cycle on and
continue increasing the heat output
every few seconds until the dial set point
is reached. Note that any input signal
(above 2 VDC for BAS, above 4mA or 24
G-90
VAC - pulse mode) will cause the SCR with
DAT to target its dial set point. If the DAT
probe is disconnected the SCR will revert
to normal operating mode (Non DAT mode)
and modulate proportionally based on input
signal.
The air flow sensor responds to radiant
heat of the heating element which, in turn,
is influenced by the air flowing through the
heater to dissipate the heat. The patented
air flow sensor and associated electronic
controller modulate the power to the heater,
adjusting the heater’s capacity to match
the air flow available. This unique concept
allows the heater to respond exactly to the
quantity of air flowing through it as well
as safely shut down in case of a total loss
of air flow.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Electronic Heating Controls
Price Silent Guard
The Price Silent Guard Heater Control
Module provides efficient operation of duct
heaters with a wide range of features to
cover all control, safety and troubleshooting
concerns. The on-board PCB relays provide
quiet and reliable operation to give the end
user peace of mind.
PSG (Price Silent Guard)
Benefits
• Quiet on-board relays
• Auto resetting 24VAC fuse
• On-board air flow switch
• Status LED to aid troubleshooting
General Information
SYSTEM CONTROLS
The Price Silent Guard (PSG) is an all-in-one
solution to duct heater control.The complex
internal wiring normally associated with
duct heater assemblies is eliminated and
replaced with the sleek and compact allinclusive PSG circuit board. Installing the
board is very straightforward: thanks to the
snap-in design and fully labeled on-board
connectors, wiring is quick and efficient.
Features
The Price Silent Guard incorporates many
features on to the board to make it the safest
and most reliable product possible:
• Accepts either switched HOT or switched COMMON input signals.
• Software averaging of input signal
prevents relay chatter and extends
device life.
• Fan interlock option prevents coil from
overheating.
• FR-4 rated circuit board complies with
safety standards.
• PCB mounted air flow switch with
Intelliflow technology.
• Easy to use with One-Phase,Three-Phase
Y or Three-Phase Delta power systems.
• Each stage handles up to 277VAC.
• Indicator lights show operation of each
stage of heat and fan output.
• Programmed time delay's prevent short
cycling of fan or heater stages.
© Copyright Price Industries Limited 2014.
Installation and Maintenance
Safety
The design of the PSG greatly reduces
installation time and increases convenience:
the unit simply snaps in to the duct heater.
Wiring connections for every possible
configuration are labeled on the board in a
straightforward manner.This reduces wiring
clutter and space required for assembly.
The PSG has undergone rigorous testing
and earned ETL approval giving the user
comfort in the safe operation of the device.
Numerous innovative concepts were
incorporated into the design of the circuit
board ensuring not only the safety of the
building and its occupants, but also the
safety and longevity of the fan and heater
components.
Troubleshooting the unit is even easier. An
on-board status LED sequentially blinks out
a troubleshooting code which indicates the
current status of the board. (For example:
three blinks means 3 stages of heating
are active, six blinks means auto reset
has tripped, etc.) The indicator lights also
show the user which individual circuits are
currently energized.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-91
System Controls
Electronic Heater Controls
Status LED
The green status LED next to the 24 VAC POWER input blinks out codes showing the current heater controller mode. This is helpful for
testing and troubleshooting the controls.
BLINKS
1
Modes
Notes
Stage 1 of heating active
Controls/Thermostat are requesting 1 stage of heat
• To verify operation disconnect Controls/Thermostat and jumper Stage 1 terminal to
either H or C (24 VAC hot or common). Relay(s) should click and red LED(s) should
light. (see table on previous page)
2
Stage 2 of heating active
Controls/Thermostat are requesting 2 stages of heat
• To verify operation disconnect Controls/Thermostat and jumper Stage 1, 2 terminals
to either H or C (24 VAC hot or common). Relays should click and red LEDs should
light.(see table on previous page)
3
Stage 3 of heating active
Controls/Thermostat are requesting 3 stages of heat
• To verify operation disconnect Controls/Thermostat and jumper Stage 1,2,3 terminals
to either H or C (24 VAC hot or common). Relays should click and red LEDs should
light. (see table on previous page)
SYSTEM CONTROLS
4
Fan (only) is engaged
Controls/Thermostat are requesting fan only
• To verify operation disconnect Controls/Thermostat and jumper F terminal to either
H or C (24 VAC hot or common). Relay should click and FAN1 yellow LED should light.
5
Heat cannot engage due to
lack of air.
Single duct with Airflow Switch (AFS)
• AFS must sense at least 0.05 in. w.c. of pressure for 15 seconds before it will engage
• AFS must be mounted vertically, it will not function properly if mounted horizontally
Fan Powered without Airflow Switch (AFS)
• Heat will not engage unless Controls/Thermostat requests FAN
• Fan interlock prevents heat from engaging without air flow
6
Automatic Reset has tripped
Automatic Reset has trippedAutomatic reset trips when it reaches 135 °F. This will cut
power to the Control Relays (E1, E2, E3). Automatic will reset after it cools.
7
Manual Reset has tripped
Manual reset trips when it reached 150 °F.This will cut power to the Safety Relays (L1, L2).
Manual reset requires service personal to reset.This typically means a major overheating
condition has occurred in the heater. Re-check ductwork and design air flows.
8
All safeties are OK, with no No call for fan and/or heat. Controller is standing by.
call for heat/fan
Technical Specifications for Price Silent Guard
Power: Controls 24VAC output:
24 VAC ±10% @ 50/60Hz (10VA – required for Silent Guard + Controls Load)
Thermal Fuse protection (with auto reset) – limited to 25 VA maximum
F, 1, 2, 3 inputs:
Auto detect switched HOT or COMMON 24 VAC
Operating Conditions:
32 °F to 122 °F [0 °C to 50 °C] 0% - 95% R.H. non-condensing
Storage Conditions:
-22 °F to 122 °F [-30 °C to 50 °C] 0% - 95% R.H. non-condensing
Processor:
8-bit flash microcontroller with on board Analog to Digital Converter
Inputs:
6 Analog custom, 2 digital
Outputs:
5 Digital custom
Relays:
277 VAC maximum, 30 Amps maximum resistive load
Connections:
¼ in. Spade Terminals – Recommend 18-22AWG copper wire
Dimensions:
5.5 in. by 8.55 in. [139.7 mm by 217.2 mm]
Shipping Weight: 0.67 lbs [303.9 grams]
Certification:
ETL listed product
G-92
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Speed Controls
Universal Speed Controller (USC)
Description
The Price Universal Speed Controller
provides variable speed control of permanent
split capacitor (PSC) motors used in Price
terminal units.
USC label with UR
mark and model
number. USC model
277-08 shown
User Adjust Dial
Minimum Adjust Dial
The USC is a solid state device with integral
heat sink/mounting plate. This results in a
long life component that is easy to install.
Models
There are is a total of four models of USC.
• 115 VAC 8 amps maximum load
• 115 VAC 15 amps maximum load (large
finned heat sink)
• 277 VAC 8 amps maximum load (same
size as 115 VAC 8 amps model but with
different label)
• 277 VAC 10 amps maximum load (large
finned heat sink)
Wiring
SYSTEM CONTROLS
The connection is 2-wire (no-polarity). The
USC is connected in series with one of the
motor lines. (Typically the hot.)
Setup
The USC is factory calibrated for the
terminal unit it is installed on. This means
the minimum adjust dial has been set to
a specified voltage. The user adjust dial
can then adjust the motor speed between
minimum and maximum speed.
Notes
When measuring the voltage output from
the speed controller you must use a TRUERMS volt-meter. A non TRUE-RMS voltmeter will give inaccurate readings due to
the shape of the AC waveform coming from
the electronic speed controller.
Certification
All USC models are UR (Underwriters
Laboratories) Recognized components.
It is not recommended to change the
minimum adjust dial since running the
motor at lower speed may reduce its life due
to overheating the windings and stressing
the shaft bearings. (Low RPM prevents
lubrication of the bearings.)
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-93
System Controls
Speed Controls
Price Standard ECM Speed Controller
Description
The Price ECM speed controller is
specifically engineered to interface with
a high-efficiency ECM motor. This low
voltage speed controller offers either full
manual control (VIA an on-board dial),
automatic control (modulation signal from
terminal unit controller), or BAS (building
automation system) control of the ECM
motor. Switching between the two modes
is easy: just apply the BAS signal and the
controller will automatically switch over
from manual (dial) mode to BAS mode.
SYSTEM CONTROLS
Features
• Low supply voltage (24 VAC).
• Dual outputs to control up to 2 ECM
motors.
• Front facing Green Diagnostic LED – for
easy troubleshooting.
• On-board manual adjustment dial with
front facing voltage taps for voltmeter
hookup (no need to open electrical
enclosure).
• Building Automation System (BAS – 2 to
10 VDC) input for variable speed remote
control.
Diagnostic LED
The Diagnostic LED blinks out the current
status of the board. This information is
used to determine if the speed controller is
operating in Manual (Dial) or BAS (Building
automation system) mode and if the current
setting is OFF or CONTROL. Note: The
Diagnostic LED repeatedly blinks out the
sequential status code followed by a pause.
• 1 Blink – Manual Off Mode
• 2 Blinks – Manual Control Mode
• 3 Blinks – BAS Off Mode
• 4 Blinks – BAS Control Mode
Building Automation System (BAS)
Interface
Specifications
Power: 24 VAC ±10% @ 50/60Hz (2VA)
Operating Conditions:
32 °F to 122 °F [0 °C to 50 °C] 0% – 95% R.H. non-condensing
Storage Conditions:
-22 °F to 122 °F [-30 °C to 50 °C] 0% – 95% R.H. non-condensing
Processor:
Inputs:
8-bit standard flash microcontroller
2 Analog (Dial input and BAS input)
Outputs: 3 Digital (GO signal to ECM, Vspd PWM signal @ 80.0 Hz, Green Status LED)
Connections:
¼ in. Spade Terminals – Recommend 18-22AWG copper wire
Dimensions:
2.5 in. by 3.8 in. [64 mm by 96 mm] (includes mounting plate)
Shipping Weight: 0.100 lbs [46 grams]
The BAS interface accepts an industry
standard 2-10 VDC signal from a controller
or computer to vary the speed of the ECM
motor. This allows remote control/shutdown
of the ECM motor based on air requirements
and/or occupancy modes. Note: turning off
24 VAC power to the ECM speed controller
will turn off ECM motor.
• 0-1 VDC BAS input – Manual Mode
• 1-2 VDC BAS input – BAS Off Mode
(recommend sending 1.5 VDC to turn off
motor)
• 2-10 VDC BAS input – Modulating
control (0 – 100%)
G-94
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Speed Controls
Deluxe ECM Speed Controller
Description
The Price Deluxe ECM speed controller
works with a high efficiency ECM motor.
This low voltage (24VAC) speed control
allows full manual (push button adjust) or
BAS (2-10VDC signal) control of the ECM
motor.
Features:
The Digital Display shows the user several
modes of operation. This allows for easier
and more precise field adjustment and
troubleshooting.
By pressing both the UP and DOWN push
buttons at the same time the user can cycle
between the following modes:
1) Speed Adjustment – is easier and more
precise with the digital display and push
buttons than with a standard dial.
2) Motor RPM – displays the real time motor
speed to aid in troubleshooting.
3) BAS input voltage – displays the input
voltage signal from the building automation
system (BAS). Note: Any BAS voltage signal
above 1 VDC overrides local speed control.
DisplayMode
Spd
Manual Speed Adjust Mode rPn
Shows current RPM of ECM motor #1 bAs
BAS Mode – Voltage Signal Range
0-100 %
0-2500 RPM
2-10 VDC
Specifications:
Power:
24 VAC ±10% @ 50/60Hz (2VA)
Operating Conditions:
32 °F to 122 °F [0 °C to 50 °C] 0% – 95% R.H. non-condensing
Storage Conditions:
-22 °F to 122 °F [-30 °C to 50 °C] 0% – 95% R.H. non-condensing
Important Information regarding
the ECM motor
Processor:
8-bit enhanced flash microcontroller
Do not switch 120/208/240/277 VAC power to
turn ECM motor on and off. Instead control
the 24VAC signal or BAS signal to turn the
ECM motor on and off. The ECM motor
has large capacitors that charge quickly
on mains power up. Switching on several
motors frequently could reduce building
power quality and is not recommended.
Inputs:
1 Analog and 3 digital inputs
Outputs: 2 Digital (GO signal to ECM and Vspd PWM signal @ 80.0 Hz)
© Copyright Price Industries Limited 2014.
Connections:
¼ in. Spade Terminals – Recommend 18-22AWG copper wire
Dimensions:
2.8 in. by 3.8 in. [71 mm by 96 mm] (includes mounting plate)
Shipping Weight:
0.220 lbs, 100 grams
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-95
SYSTEM CONTROLS
• Dual outputs for controlling 2 ECM
motors (Note: Both motors will receive
the same signal.)
• Red three-digit digital display for
reading out:
a) Speed 0-100%
b) Motor RPM (for motor number 1 only)
c) BAS input voltage (Digital readout of
incoming BAS voltage signal.)
• Building Automation System input
(2-10VDC) for remote control
LED Digital Display
System Controls
Speed Controls
Deluxe ECM Speed Controller
Low Voltage Wiring
The Price Deluxe ECM speed controller
works with a high efficiency ECM motor.
This low voltage (24VAC) speed control
allows full manual (push button adjust) or
BAS (2-10VDC signal) control of the ECM
motor.
BACK OF ECM DELUXE SPEED CONTROLLER
*Note: 24VAC COM, BAS COM, ANALOG
OUTPUT COM are all connected together.
***Please observe 24 VAC polarity.***
Analog RPM Output Signal
A two wire connection supplies an analog
(0-10VDC) signal that is directly proportional
is the MOTOR 1 RPM.
SYSTEM CONTROLS
The range is 0 – 2500 RPM and it will output
a proportional 0 – 10 VDC signal. If a dual
blower system is used only the RPM from
motor 1 can be read. Note: The minimum
speed of the ECM motor is approximately
250 RPM. Formula for outputs below
(tolerance ± 10%):
• VDC output = (RPM / 250)
• RPM = (VDC * 250)
Output signal: 0 – 10 VDC @ 20k ohm
minimum input impedance and is short
circuit protected. (Output impedance is 511
ohm to protect against incorrect wiring)
•
•
Black wire –
ANALOG RPM OUTPUT COM
White wire –
ANALOG RPM OUTPUT + (SIGNAL)
2500
2205
1890
1575
1260
945
630
315
0
BAS Input Signal
The BAS input signal overrides the local set-point using a remote 0 – 10 VDC signal. If the
BAS signal drops below 1 VDC local control (via the push buttons) is restored.
G-96
BAS Voltage
Response
Notes
0 – 1 VDC
Local Control mode using
push buttons
Local set-point can be adjusted from
0 – 100 (%)
1 – 2 VDC
Motor OFF
Recommend sending a 1.5 VDC signal
to command motor off
2 – 9 VDC
Modulating control
2 – 9 VDC modulates motor from
0-100%
9 – 10 VDC
Maximum Speed
Motor is running at maximum speed
(100%)
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Price Controls Bootloader
The length of time to load the new
program depends on the size of the code
and the baud rate (speed) used. Typically
most Price Controls can be bootloaded in
approximately 1-2 minutes.
DDC Controller powers up
Run bootloader
Check EEPROM (run MAIN code or BOOT?)
Run Main program.
Normal operation
Stay in Bootloader mode and
wait for new code via PC
SYSTEM CONTROLS
Bootloading allows a user to re-program a
controller "remotely" through a thermostat
using a Laptop and interface cable. This
is a convenient way to update controls
without climbing ladders or moving
furniture. Bootloading a controller is
sometimes necessary to add a new feature
or change operations in the field. Price
offers bootloading on most of its latest
generation controls. Bootloading can be
done by trained Price representatives or
Price factory personel.
Technician with laptop bootloading
through the thermostat’s service port.
© Copyright Price Industries Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-97
System Controls
Field Service Tools
Price Controls Field Programmer
When bootloading a controller is not
possible it can still be re-programmed in
the field using a portable device. Price has
developed a small hand held programmer
that can load a new program into DDC
controls. This device must be plugged
directly into the FLASH programming jack
of the DDC controller.
Price Intelligent Controller (PIC)
Price Field Programmer
SYSTEM CONTROLS
The Price Field Programmer will typically
not require an external power source and
can liberate power from its target circuit
board. Indicator LED”s show the user the
status of the programming and whether it
was successful or not.
Most modern microcontrollers that run the
software program/code are good for several
thousand write or FLASH program cycles.
Therefore there is no concern of 'wearing'
out the main microcontroller with field
updates. Also the code is stored in non
volatile electrically erasable memory that
does not require power to maintain its state.
Therefore power failures will not affect any
code in the controller.
This service tool is available to Price
representatives when required to update
a jobsite. Please contact application
engineering to verify your jobsites
compatibility.
Interface cable
Price BACnet Commissiong Tool
BACnet MS/TP networks are often complex
and contain devices from multiple
manufacturers. Many hours of labour
are devoted to network startup, locating
problem devices, and pinpointing faulty
wiring.
The BACnet Commissioning Tool (BCT) is
comprised of two components: a software
suite that runs on a PC, and a hardware
adapter that connects to an MS/TP network
segment. Once connected, BCT monitors
BACnet traffic to determine the network’s
health. If needed, troubleshooting tactics
are suggested to the user to assist in quickly
determining the root cause of any network
issues.
BCT is able to diagnose multiple network
maladies including duplicate MAC
addresses, and heavy traffic causing slow
performance.
G-98
Service PC
PRICE Contoller
To rest of
MS/TP
segment
USB
MS/TP (RS-485)
BCT Adapter
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
System Controls
Controls Glossary
B.A.S. (Building Automation System)
EMC (Electronic Modulating Control)
PRTU
The Building automation system can be
used in place of a thermostat signal. It is an
input signal that is relayed to the controllers
and instructs them to control to a certain
temperature.
This type of heater control is similar to the
SCR except it has an additional air flow
sensor which can override the temperature
signal, to limit the amount of heat the heater
will create. (Allows heat to be supplied at
very low flows.)
The price digital rooftop controller, it
includes a fully programmable wallmounted controlling thermostat, and input/
output module for rooftop control.
Control main distribution duct/plenum static
pressure by relieving (bypassing) supply air
from the distribution duct/plenum back to
the rooftop unit to maintain system pressure
in a set range through the use of a control
valve or damper.
Control Point
The actual value of the controlled variable
(ex the room temperature).
Cooling Mode
A mode of operation for the rooftop
controller, during which 1 or 2 stages
of cooling are in operations i.e. the
compressors are energized and the rooftop
is supply cool conditioned air.
A mode of operation for the zone controllers,
during which the zone controller is calling
for percentage of cooling based on the
difference between the room temperature
set-point and the actual room temperature
air between min and max cooling.
The demand for cooling is created when the
room temperature is higher than the room
temperature set-point.
Dead Band
A range of values typically surrounding the
set-point in which no controller actions are
taken.
Demand
Demand is the call for one of the three types
of operation, Cooling, Heating, or Neutral
Mode.
Direct Acting
A device is said to be direct acting when
an increase in input signal results in an
increase in output signal.
Direct Digital Controls
Complex micro-processor based controls
that are capable of being networked.
Offer Proportional Integral control of the
air flow.
Economizer
Fresh air damper that works in conjunction
with the cooling signal and the outside air
temperature sensor, to provide cool outdoor
as a source of cooling when the outdoor air
temperature is in the allowable range.
Electronic Controls
Very simple devices that use Proportional
control to control air flow.
© Copyright Price Industries Limited 2014.
Error Signal
The differential between the set-point and
the actual point of control.
Heating Mode
A mode of operation for the rooftop
controller, during which 1 or 2 stages of
heating are in operations i.e. the heating
coil is energized and the rooftop unit is
supplying warm conditioned air.
A mode of operation for the zone controller,
during which a demand for heat is made.
Often the demand for heat is used to
energize reheat coils, and is created when
the room temperature is less than the room
temperature set-point.
Network
A network in the controlling sense is a
connection of all the controls for mechanical
equipment (in the case the HVAC equipment)
which allows for the transfer of data.
Neutral Mode
A mode of operation for the rooftop
controller, during which no actions (heating
or cooling) are taken i.e. the majority of the
space is satisfied (Fan is typically still in
operation for ventilation purposes).
A mode of operation for the zone controller,
during which it is completely satisfied i.e.
the room temperature is equal to the room
temperature set-point, or is in the dead
band.
Night Setback
The reduction of room set-points overnight
when the space becomes unoccupied
Typically there is no air (i.e. the rooftop fan
has shut down) since there are no people
that require ventilation.
Normally Open/Normally Closed
Refers to the fail safe position of the VAV
units damper.
Output Signal
A signal that the controller uses to change
the current situation, for example if the
controller is reading a temperature that is 3
degrees higher than the set-point it will send
out a OUTPUT signal to the damper to try
and change the current room temperature
(by opening the damper and allowing for
more cooling).
Pneumatic Controls
VAV controls that are typically powered
using 15-25 psi compressed air.
Very simple device that use proportional
control to control air flow.
Pressure Dependent
An air regulating device is considered
pressure dependent if its ability to regulate
air flow is dependent on the system static
pressure. For example a cooling damper
with no air flow sensor will open on an
increase in space temperature however
the air flow that is allowed to pass through
the damper will change if the static changes
(increase in static equals increase in flow).
Pressure Independent
An air regulating device is considered
pressure independent if it can control to a
specific air volume regardless of fluctuations
in system static pressure.
Primary Control Strategies
These are the first line of control, usually
polling, they are used in conjunction with
secondary strategies such as indoor air
quality control or supply air temperature
limiting to control the rooftops behavior.
Proportional Band
The range through which the output of
the controller spans from minimum to
maximum.
Often known as the Reset Range for
pneumatics.
Proportional Control
A type of control in which the Output Signal
is proportional to the Error Signal.
Proportional Integral Control
A combination of both proportional control,
and time dependent integral control.
Protocol Converter
A device which converts different network
languages so that equipment with different
network languages can communicate on the
same network.
Reverse Acting
A device is said to be direct acting when an
increase in input signal results in a decrease
in output signal.
Schedule
A time dependent way of automating the
controllers functions, such as night setback,
morning warm-up etc.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-99
SYSTEM CONTROLS
Bypass Pressure Control
System Controls
Controls Glossary
SCR (Silicon Control Rectifier)
SCR control is a type of modulating control
device that is used with electric heaters to
modulate the amount of heat by switching
solid state relays on and off very rapidly.
The frequency and time delay of switching
determine how much heat is provided.
Secondary Control Strategies
A means of control that works in conjunction
with the primary method.
A more advanced system of control which
offers more flexibility to the user.
Set Point
The desired value to which the controller is
trying to control to.
System Demand Total
The sum of each zone demand percentage.
SYSTEM CONTROLS
Represents the total demand of the space,
regardless of what type of demand it is.
System Demand Percentage
A numerical representation of the demand
per type of demand of the entire space.
Zone Demand
The demand in an individual zone.
If the room temperature is below the setpoint the Zone Demand is Heating.
If the room temperature is above the setpoint the Zone Demand is Cooling.
If the room temperature is equal to the setpoint the Zone Demand is Neutral.
Zone Demand Percentage
The amount of demand based on a
percentage scale, 100% is considered full
or max demand, 0% is considered min
demand –
Zone Reheat
One of many possible types of reheat, could
include:
• Duct heaters (Electric or Hot water)
• Perimeter reheat
• Radiant Panel
G-100
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright Price Industries Limited 2014.
Alphabetical Index by Product
F123-F129
Fume Hood
LDV, Digital Control............................................................................................................................................. F180-F181, F184-F187
LDVQ, Quiet Digital Control...................................................................................................................................................... F188-F195
LEV, Electronic Control........................................................................................................................................ F180-F181, F184-F187
LPV, Pneumatic Control....................................................................................................................................... F180-F181, F184-F187
LPVQ, Quiet Pneumatic Control............................................................................................................................................... F188-F195
General Exhaust
RDV, Digital Control................................................................................................................................................................... F182-F187
RDVQ, Quiet Digital Control...........................................................................................................................................F188, F196-F202
REV, Electronic Control.............................................................................................................................................................. F182-F187
RPV, Pneumatic Control............................................................................................................................................................ F182-F187
RPVQ, Quiet Pneumatic Control....................................................................................................................................F188, F196-F202
Laboratory
RDV/SS, Digital Control............................................................................................................................................................. F182-F187
RDVQ/SS, Quiet Digital Control............................................................................................................................................... F196-F202
REV/SS, Electronic Control........................................................................................................................................................ F182-F187
RPV/SS, Pneumatic Control...................................................................................................................................................... F182-F187
RPVQ/SS, Quiet Pneumatic Control......................................................................................................................................... F196-F202
Venturi Valves
VVA.............................................................................................................................................................................................. F178-F179
Blower Coils
F132-F157
Electric.................................................................................................................................................................................F1-174-F1-178
Horizontal
BCH....................................................................................................................................................................................... F1-132-F1-145
BCHQ, Quiet........................................................................................................................................................................ F1-146-F1-157
Vertical
BCV....................................................................................................................................................................................... F1-158-F1-168
BCVQ, Quiet........................................................................................................................................................................ F1-169-F1-173
Dual Duct Terminal Units
F132-F157
Controller Type Non-Mixing
DDV, Digital Control........................................................................................................................................... F205-F207, F212-F215
DEV, Electronic Control...................................................................................................................................... F205-F207, F212-F215
DPV, Pneumatic Control.................................................................................................................................... F205-F207, F212-F215
Standard
DDS, Digital Control............................................................ F205-F206, F208, F212-F215, 220-F222, F229-F230, F232-F233
DES, Electronic Control....................................................... F205-F206, F208, F212-F215, 220-F222, F229-F230, F232-F233
DPS, Pneumatic Control..................................................... F205-F206, F208, F212-F215, 220-F222, F229-F230, F232-F233
Quiet
DDQ, Digital Control.................................. F205-F206, F209, F212-F215, F217, F220, F223-F224, F229, F231, F234-F235
DDUQ, Ultra Quiet Digital Control......................................................................F204-F206, F211-F215, F219-F220, F227-F228
DEQ, Electronic Control............................ F205-F206, F209, F212-F215, F217, F220, F223-F224, F229, F231, F234-F235
DPQ, Pneumatic Control........................... F205-F206, F209, F212-F215, F217, F220, F223-F224, F229, F231, F234-F235
DPUQ, Ultra Quiet Pneumatic Control.......................................................................... F205-F206, F212-F215, F220, F227-F228
High-Mixing
DDM, Digital Control................................................................................F205-F206, F210, F212-F215, F218, F220, F225-F226
DEM, Electronic Control...........................................................................F205-F206, F210, F212-F215, F218, F220, F225-F226
DPM, Pneumatic Control.........................................................................F205-F206, F210, F212-F215, F218, F220, F225-F226
© Copyright E.H. Price Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-101
TERMINALS & CONTROLS
Air Volume Control Valves
Alphabetical Index by Product
Mechanical Type
DH, High Pressure, Constant Volume..................................................................................................................................... F236-F240
DHV, High Pressure, Variable Volume.................................................................................................................................... F236-F240
Electronic Controls
G-14-G-16
CTE-5100 ................................................................................................................................................................................ G-14 – G-15
Direct Digital Controls .................................................................................................................................................................... G-16
ECM Motor Option G92-G94
EMC Control ................................................................................................................................................................................ G92-G94
Electronic Heating Controls
G-46
TERMINALS & CONTROLS
Binary Control .................................................................................................................................................................................... G-46
SCR Control.......................................................................................................................................................................................... G-46
EMC Control ........................................................................................................................................................................................ G-46
Fan Coils
F1-4-F1-19
High Performance
FCHG Series..................................................................................................................................................F1-65-F1-81, F1-97-F1-100
FCHGQ Series, Quiet.............................................................................................................................................................. F1-82-F1-96
Horizontal Concealed Basic
FCHCB Series..............................................................................................F1-30, F1-32, F1-34, F1-35, F1-38-F1-40, F1-42, F1-44
Horizontal Concealed Plenum
FCHCP Series..............................................................................................F1-30, F1-32, F1-34, F1-36, F1-38-F1-40, F1-42, F1-44
Horizontal Exposed
FCHE Series............................................................................................................... F1-31, F1-33-F1-34, F1-37, F1-41, F1-43-F1-44
Vertical Concealed
FCVC.......................................................................................................................................................................................... F1-45-F1-54
Vertical Exposed
FCVE.......................................................................................................................................................................................... F1-45-F1-54
Fan Powered Terminal Units
F174-F290
Constant Volume/Acoustically Enhanced
FDCA, Digital Control........................................................................................................................................ F249-F251, F286-F313
FPCA, Pneumatic Control.................................................................................................................................. F249-F251, F286-F313
Constant Volume/Genesis
FDCG, Digital Control.........................................................................................................................................F249-F251, F314-F345
FECG, Electronic Control...................................................................................................................................F249-F251, F314-F345
FPCG, Pneumatic Control..................................................................................................................................F249-F251, F314-F345
Constant Volume/Genesis Quiet
FDCGQ, Digital Control..................................................................................................................................... F249-F251, F346-F365
FECGQ, Electronic Control............................................................................................................................... F249-F251, F346-F365
FPCGQ, Pneumatic Control.............................................................................................................................. F249-F251, F346-F365
Constant Volume/Series Flow
FDC, Digital Control.................................................................................................................................................................. F249-F285
G-102
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright E.H. Price Limited 2014.
FEC, Electronic Control............................................................................................................................................................ F249-F285
FPC, Pneumatic Control........................................................................................................................................................... F249-F285
Quiet/High Capacity
FPCQ2, Pneumatic Control...................................................................................................................................................... F232-F242
FECQ2, Electronic Control....................................................................................................................................................... F232-F242
FDCQ2, Digital Control............................................................................................................................................................ F232-F242
Constant Volume/Low Profile
FDCLP, Digital Control........................................................................................................................................F249-F251, F366-F381
FECLP, Electronic Control..................................................................................................................................F249-F251, F366-F381
FPCLP, Pneumatic Control.................................................................................................................................F249-F251, F366-F381
Variable Volume/Parallel Flow
FDV, Digital Control................................................................................................................................................................... F382-F409
FEV, Electronic Control............................................................................................................................................................. F382-F409
FPV, Pneumatic Control............................................................................................................................................................ F382-F409
Variable Volume/Low Profile
FDVLP, Digital Control...............................................................................................................................................................F410-F420
FEVLP, Electronic Control.........................................................................................................................................................F410-F420
FPVLP, Pneumatic Control........................................................................................................................................................F410-F420
Induction Terminals
F305-F318
Induction
IDV, Digital Control..................................................................................................................................................................... F432-F444
IEV, Electronic Control............................................................................................................................................................... F432-F444
IPV, Pneumatic Control.............................................................................................................................................................. F432-F444
TERMINALS & CONTROLS
Alphabetical Index by Product
NetworkingG-41-G-43
BACnet Protocol ................................................................................................................................................................................ G-41
Protocol Convertor ............................................................................................................................................................................ G-43
BACnet MS/TP Information ................................................................................................................................................... G-41-G-43
Pneumatic Controls
G-10-G-13
CP101........................................................................................................................................................................................... G-10-G-13
CP100........................................................................................................................................................................................... G-10-G-13
CP200.......................................................................................................................................................................................... G-10-G-13
Price Digital Rooftop Controller
G-22-G-39
PRTU ...........................................................................................................................................................................................G-22-G-39
Retrofit Terminal Units
F321-F324
External Complete Assembly
RDV, Digital Control................................................................................................................................................................... F445-F450
REV, Electronic Control.............................................................................................................................................................. F445-F450
RPV, Pneumatic Control............................................................................................................................................................ F445-F450
Short Unit
RDS, Digital Control................................................................................................................................................................... F445-F450
RES, Electronic Control.............................................................................................................................................................. F445-F450
RPS, Pneumatic Control............................................................................................................................................................. F445-F450
Without Damper
RDX, Digital Control................................................................................................................................................................... F445-F450
REX, Electronic Control.............................................................................................................................................................. F445-F450
RPX, Pneumatic Control............................................................................................................................................................ F445-F450
© Copyright E.H. Price Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-103
Alphabetical Index by Product
RMS Remote Measuring Station
F325-F343
Design 75 Regulator............................................................................................................................................................... F454-F462
Internal
IRDV, Digital Control.................................................................................................................................................................. F451-F453
IREV, Electronic Control............................................................................................................................................................. F451-F453
IRPV, Pneumatic Control........................................................................................................................................................... F451-F453
Slide-In
SRDV, Digital Control..................................................................................................................................................... F451, F463-F469
SREV, Electronic Control............................................................................................................................................... F451, F463-F469
SRPV, Pneumatic Control.............................................................................................................................................. F451, F463-F469
TERMINALS & CONTROLS
Single Duct Terminal Units
F10-F122
Controller Type
SDV, Digital Control........................................................................................................................................ F38, F45-F90, F139-F142
SEV, Electronic Control................................................................................................................................... F38, F45-F90, F139-F142
SPV, Pneumatic Control................................................................................................................................. F38, F45-F90, F139-F142
Quiet Controller Type
SDVQ, Digital Control..........................................................................................................................................................F38, F91-F117
SEVQ, Electronic Control.....................................................................................................................................................F38, F91-F117
SPVQ, Pneumatic Control...................................................................................................................................................F38, F91-F117
Controller Type Low Profile
SDVLP, Digital Control............................................................................................................................... F38, F118-F135, F139-F142
SEVLP, Electronic Control.......................................................................................................................... F38, F118-F135, F139-F142
SPVLP, Pneumatic Control......................................................................................................................... F38, F118-F135, F139-F142
Controller Type Quiet Exhaust
SDE, Digital Control.......................................................................................................................................................... F38, F143-F147
SEE, Electronic Control..................................................................................................................................................... F38, F143-F147
SPE, Pneumatic Control.................................................................................................................................................... F38, F143-F147
Controller Type Ultra Quiet Exhaust
SDEQ, Digital Control....................................................................................................................................................... F38, F148-F153
SPEQ, Pneumatic Control................................................................................................................................................. F38, F148-F153
Mechanical Type
SH, High Pressure, Constant Volume................................................................................................................... F38, F154-F162, F166
SHR, High Pressure, Constant Volume Hot Water Coil.................................................................................................F155, F159-F162
SHRE, High Pressure, Constant Volume Electric Coil...................................................................................................F155, F163-F165
SHV, High Pressure, Variable Volume.................................................................................................................. F38, F154-F162, F166
SHVR, High Pressure, Variable Volume Hot Water Coil................................................................................................F155, F159-F162
SHVRE, High Pressure, Variable Volume Electric Coil..................................................................................................F155, F163-F165
By-Pass
LGB, Low Pressure Gate By-Pass..................................................................................................................................... F38, F168-F177
Special Application Terminal Units
F345
Under Window Units .................................................................................................................................................................. F471-F472
Underfloor Controls Overview
G-44-G-45
UMC1/UMCB Overview ..............................................................................................................................................................G-44-G-45
G-104
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright E.H. Price Limited 2014.
Index by Product Code
B
BACnet MS/TP Information.................................................................................................................................................... G-41-G-43
BACnet Protocol................................................................................................................................................................................. G-41
Binary Control..................................................................................................................................................................................... G-46
C
CP100........................................................................................................................................................................................... G-10-G-13
CP101........................................................................................................................................................................................... G-10-G-13
CP200.......................................................................................................................................................................................... G-10-G-13
CTE-5100.................................................................................................................................................................................... G-14-G-15
DDM, Digital Control.................................................................................................................................................................. F132-F157
DDQ, Digital Control.................................................................................................................................................................. F132-F157
DDS, Digital Control................................................................................................................................................................... F132-F157
DDV, Digital Control................................................................................................................................................................... F132-F157
DEM, Electronic Control............................................................................................................................................................. F132-F157
DEQ, Electronic Control............................................................................................................................................................. F132-F157
DES, Electronic Control.............................................................................................................................................................. F132-F157
Design 75 Regulator............................................................................................................................................................... F326-F336
DEV, Electronic Control............................................................................................................................................................. F132-F157
DH, High Pressure....................................................................................................................................................................... F132-F157
Direct Digital Controls..................................................................................................................................................................... G-16
DL, Low Pressure........................................................................................................................................................................ F132-F157
DPM, Pneumatic Control........................................................................................................................................................... F132-F157
DPQ, Pneumatic Control............................................................................................................................................................ F132-F157
DPS, Pneumatic Control............................................................................................................................................................ F132-F157
DPV, Pneumatic Control............................................................................................................................................................ F132-F157
E
EMC Control............................................................................................................................................................... G-46 & F292-F294
© Copyright E.H. Price Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-105
TERMINALS & CONTROLS
D
Index by Product Code
F
TERMINALS & CONTROLS
FCHCB Series, Horizontal Concealed Basic.............................................................................................................................F1-4-F1-19
FCHCP Series, Horizontal Concealed Plenum.........................................................................................................................F1-4-F1-19
FDC, Digital Control................................................................................................................................................................... F209-F230
FDCG, Digital Control.................................................................................................................................................................F174-F198
FDCGQ, Digital Control.............................................................................................................................................................F200-F207
FDCLP, Digital Control............................................................................................................................................................... F243-F257
FDCQ2, Digital Control.............................................................................................................................................................. F232-F242
FDV, Digital Control.................................................................................................................................................................... F258-F279
FDVLP, Digital Control............................................................................................................................................................... F280-F290
FEC, Electronic Control.............................................................................................................................................................. F209-F230
FECG, Electronic Control............................................................................................................................................................F174-F198
FECGQ, Electronic Control........................................................................................................................................................F200-F207
FECLP, Electronic Control......................................................................................................................................................... F243-F257
FECQ2, Electronic Control......................................................................................................................................................... F232-F242
FEV, Electronic Control.............................................................................................................................................................. F258-F279
FEVLP, Electronic Control......................................................................................................................................................... F280-F290
FPC, Pneumatic Control............................................................................................................................................................. F209-F230
FPCG, Pneumatic Control...........................................................................................................................................................F174-F198
FPCGQ, Pneumatic Control.......................................................................................................................................................F200-F207
FPCLP, Pneumatic Control........................................................................................................................................................ F243-F257
FPCQ2, Pneumatic Control....................................................................................................................................................... F232-F242
FPV, Pneumatic Control............................................................................................................................................................. F258-F279
FPVLP, Pneumatic Control........................................................................................................................................................ F280-F290
I
IDV, Digital Control..................................................................................................................................................................... F305-F318
IEV, Electronic Control............................................................................................................................................................... F305-F318
IPV, Pneumatic Control.............................................................................................................................................................. F305-F318
IRDV, Digital Control.................................................................................................................................................................. F326-F336
IREV, Electronic Control............................................................................................................................................................. F326-F336
IRPV, Pneumatic Control........................................................................................................................................................... F326-F336
L
LDV, Digital Control.................................................................................................................................................................... F123-F129
LEV, Electronic Control.............................................................................................................................................................. F123-F129
LGB, Low Pressure Gate By-Pass.............................................................................................................................................. F133-F122
LPV, Pneumatic Control............................................................................................................................................................. F123-F129
P
PRTU............................................................................................................................................................................................G-22-G-39
Protocol Convertor............................................................................................................................................................................. G-43
G-106
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
© Copyright E.H. Price Limited 2014.
Index by Product Code
RDS, Digital Control...................................................................................................................................................................... F321-F324
RDV, Digital Control...................................................................................................................................................................... F123-F129
RDV, Digital Control...................................................................................................................................................................... F321-F324
RDV/SS, Digital Control................................................................................................................................................................ F123-F129
RDX, Digital Control...................................................................................................................................................................... F321-F324
RES, Electronic Control................................................................................................................................................................. F321-F324
REV, Electronic Control................................................................................................................................................................. F123-F129
REV, Electronic Control................................................................................................................................................................. F321-F324
REV/SS, Electronic Control........................................................................................................................................................... F123-F129
REX, Electronic Control................................................................................................................................................................. F321-F324
RPS, Pneumatic Control................................................................................................................................................................ F321-F324
RPV, Pneumatic Control............................................................................................................................................................... F123-F129
RPV, Pneumatic Control............................................................................................................................................................... F321-F324
RPV/SS, Pneumatic Control......................................................................................................................................................... F123-F129
RPX, Pneumatic Control............................................................................................................................................................... F321-F324
S
SCR Control........................................................................................................................................................................................... G-46
SDE, Digital Control..........................................................................................................................................................................F85-F91
SDV, Digital Control.......................................................................................................................................................................... F10-F51
SDVLP, Digital Control.....................................................................................................................................................................F59-F84
SDVQ, Digital Control.......................................................................................................................................................................F53-F58
SEE, Electronic Control.....................................................................................................................................................................F85-F91
SEV, Electronic Control..................................................................................................................................................................... F10-F51
SEVLP, Electronic Control................................................................................................................................................................F59-F84
SEVQ, Electronic Control..................................................................................................................................................................F53-F58
SH, High Pressure.............................................................................................................................................................................F94-F111
SL, Low Pressure..............................................................................................................................................................................F94-F111
SPE, Pneumatic Control....................................................................................................................................................................F85-F91
SPV, Pneumatic Control................................................................................................................................................................... F10-F51
SPVLP, Pneumatic Control...............................................................................................................................................................F59-F84
SPVQ, Pneumatic Control................................................................................................................................................................F53-F58
SRDV, Digital Control.................................................................................................................................................................... F337-F343
SREV, Electronic Control.............................................................................................................................................................. F337-F343
SRPV, Pneumatic Control............................................................................................................................................................. F337-F343
U
UMC1/UMCB Overview.............................................................................................................................................................G-44-G-45
Under Window Units........................................................................................................................................................................... F345
© Copyright E.H. Price Limited 2014.
All Metric dimensions ( ) are soft conversion.
Imperial dimensions are converted to metric and rounded to the nearest millimetre.
G-107
TERMINALS & CONTROLS
R