Download 263213 - engine generators

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PRODUCT MASTERSPEC LICENSED BY ARCOM TO GENERAC POWER SYSTEMS, INC.
This Product MasterSpec Section is licensed by ARCOM to Generac Power Systems, Inc. ("Licensee").
This Product MasterSpec Section modifies the original MasterSpec text, and does not include the
full content of the original MasterSpec Section.
Revisions made to the original MasterSpec text are made solely by the Licensee and are not endorsed by,
or representative of the opinions of, ARCOM or The American Institute of Architects (AIA). Neither
AIA nor ARCOM are liable in any way for such revisions or for the use of this Product MasterSpec
Section by any end user. A qualified design professional should review and edit the document to suit
project requirements.
For more information, contact Generac Power Systems, Inc., S45W29290 Wisconsin 59, Waukesha, WI
53189; Phone: (888) 436-4782; Website: www.generac.com.
For information about MasterSpec contact ARCOM at (800) 424-5080 or visit www.MasterSpec.com.
SECTION 263213 - ENGINE GENERATORS
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PART 1 - GENERAL
1.1
RELATED DOCUMENTS
A.
1.2
Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
SUMMARY
A.
Section includes packaged engine-generator sets for [emergency] [standby] [optional
standby] power supply with the following features:
1.
2.
3.
4.
5.
6.
7.
8.
[Gas] [Diesel] [Bifuel: combined diesel and natural gas] [Dual-Fuel natural-gas with
automatic LP backup] engine.
[Unit-mounted] [Remote-mounted] cooling system.
Unit-mounted control and monitoring.
Performance requirements for sensitive loads.
Fuel system.
Integrated Parallel of generator sets.
Load banks.
Outdoor enclosure.
ENGINE GENERATORS
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B.
Related Requirements:
1.
1.3
Section 263600 "Transfer Switches" for transfer switches including sensors and relays to
initiate automatic-starting and -stopping signals for engine-generator sets.
DEFINITIONS
A.
Operational Bandwidth: The total variation from the lowest to highest value of a parameter over
the range of conditions indicated, expressed as a percentage of the nominal value of the
parameter.
B.
LP: Liquid petroleum.
C.
EPS: Emergency power supply.
D.
EPSS: Emergency power supply system.
E.
Bifuel: Starting and pilot fuel as diesel, running fuel as natural gas.
F.
Dual-Fuel: Primary fuel as natural gas, backup onsite fuel as LP.
G.
Emergency Power Supply: NEC700, essential for life safety loads. Generator to meet NFPA
110 Level 1.
H.
Standby Power Supply: NEC701, legally required. Generator to meet NFPA 110 Level 2.
I.
Optional Standby Power Supply: NEC702, optional standby.
1.4
ACTION SUBMITTALS
A.
Product Data: For each type of product.
1.
2.
3.
4.
5.
6.
7.
B.
Include rated capacities, operating characteristics, electrical characteristics, and furnished
specialties and accessories.
Include thermal damage curve for generator.
Include time-current characteristic curves for generator protective device.
Include fuel consumption in [gallons per hour] [cubic feet per hour] at 0.8 power factor
at 0.5, 0.75 and 1.0 times generator capacity.
Include generator efficiency at 0.8 power factor at 0.5, 0.75 and 1.0 times generator
capacity.
Include air flow requirements for cooling and combustion air in cfm at 0.8 power factor
and rated load. Testing shall be performed per ISO3046 standards. Provide drawings
showing requirements and limitations for location of air intake and exhausts.
Include generator characteristics, including, but not limited to kw rating, efficiency,
reactances, and short-circuit current capability.
Shop Drawings:
ENGINE GENERATORS
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1.
2.
3.
4.
5.
6.
1.5
Include plans and elevations for engine-generator set and other components specified.
Indicate access requirements affected by height of subbase fuel tank.
Include details of equipment assemblies. Indicate dimensions, weights, center of gravity
of full assembly, loads, required clearances, method of field assembly, components, and
location and size of each field connection.
Identify fluid drain ports and clearance requirements for proper fluid drain.
Design calculations for selecting vibration isolators and seismic restraints and for
designing vibration isolation bases.
Vibration Isolation Base Details: Detail fabrication including anchorages and attachments
to structure and to supported equipment. Include base weights.
Include diagrams for power, signal, and control wiring. Complete schematic, wiring, and
interconnection diagrams showing terminal markings for EPS equipment and functional
relationship between all electrical components.
INFORMATIONAL SUBMITTALS
A.
Qualification Data: For [Installer] [manufacturer] [and] [testing agency].
1.
B.
Seismic Qualification Certificates: For engine-generator set, accessories, and components, from
manufacturer.
1.
2.
3.
C.
Statement of quality from manufacturer detailing acceptance as an ISO9001
manufacturer.
Basis for Certification: Indicate whether withstand certification is based on actual test of
assembled components or on calculation.
Dimensioned Outline Drawings of Equipment Unit: With engine and generator mounted
on rails identify center of gravity and total weight[ including full fuel tank], [supplied
enclosure,] [external silencer,] [subbase-mounted fuel tank,] [skid-mounted, free
standing load bank,] and each piece of equipment not integral to the engine-generator
set, and locate and describe mounting and anchorage provisions.
Detailed description of equipment anchorage devices on which the certification is based
and their installation requirements.
Source quality-control reports, including, but not limited to the following:
1.
2.
3.
4.
5.
6.
7.
Certified summary of prototype-unit test report.
Certified Test Reports: For components and accessories that are equivalent, but not
identical, to those tested on prototype unit.
Certified Summary of Performance Tests: Certify compliance with specified requirement
to meet performance criteria for sensitive loads.
Report of factory test on units to be shipped for this Project, showing evidence of
compliance with specified requirements.
Report of sound generation.
Report of exhaust emissions showing compliance with applicable regulations.
Certified Torsional Vibration Compatibility: Comply with NFPA 110.
D.
Field quality-control reports.
E.
Warranty: For special warranty.
ENGINE GENERATORS
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1.6
CLOSEOUT SUBMITTALS
A.
Operation and Maintenance Data: For packaged engine generators to include in emergency,
operation, and maintenance manuals.
1.
In addition to items specified in Section 017823 "Operation and Maintenance Data,"
include the following:
a.
b.
c.
1.7
List of tools and replacement items recommended to be stored at Project for ready
access. Include part and drawing numbers, current unit prices, and source of
supply.
Operating instructions laminated and mounted adjacent to generator location.
Training plan.
MAINTENANCE MATERIAL
A.
Furnish extra materials that match products installed and that are packaged with protective
covering for storage and identified with labels describing contents.
1.
2.
3.
4.
1.8
Fuses: One for every 10 of each type and rating but no fewer than one of each.
Indicator Lamps: Two for every six of each type used, but no fewer than two of each.
Filters: One set each of lubricating oil, fuel, and combustion-air filters.
Special Tools: Tools unique to the product for standard maintenance, listed by part
number in operations and maintenance manual.
QUALITY ASSURANCE
A.
Manufacturer Qualifications: Manufacturer accepted as an ISO9001 manufacturer.
B.
Installer Qualifications: Manufacturer's authorized representative who is trained and approved
by manufacturer.
C.
Third-Party Testing Agency Qualifications: Member company of NETA or an NRTL.
1.
1.9
Testing Agency's Field Supervisor: Certified by NETA to supervise on-site testing.
WARRANTY
A.
Manufacturer's Warranty: Manufacturer agrees to repair or replace components of packaged
engine generators and associated auxiliary components that fail in materials or workmanship
within specified warranty period.
1.
Warranty Period: [2] [5] [7] [10] years from date of Substantial Completion.
ENGINE GENERATORS
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PART 2 - PRODUCTS
2.1
MANUFACTURERS
A.
Basis-of-Design Product: Subject to compliance with requirements, provide Generac Power
Systems, Inc; [Diesel] [Natural Gas] [Liquified Propane] [Bifuel] model [SD] [SG] [SB]
[MD] [MG] [MB] ] <insert model number> generator set, rated <insert kW>, <insert
voltage>, [single][three] phase, 60 hz, or a comparable product by one of the following:
1.
<Insert manufacturer's name>.
B.
Source Limitations: Obtain packaged generator sets and auxiliary components through one
source from a single manufacturer. Generator set shall be standard offering from manufacturer.
No special ratings will be permitted.
C.
Engineering changes resulting from the substitution of another product will be the responsibility
of the electrical contractor.
2.2
PERFORMANCE REQUIREMENTS
A.
Seismic Performance: Engine-generator set housing, subbase fuel tank, engine-generator set,
batteries, battery racks, silencers, [load banks,] and sound attenuating equipment, accessories,
and components shall withstand the effects of earthquake motions determined according to
[ASCE/SEI 7] <Insert requirement>.
1.
2.
3.
B.
The term "withstand" means "the unit will remain in place without separation of any parts
when subjected to the seismic forces specified[ and the unit will be fully operational
after the seismic event]."
Shake-table testing shall comply with ICC-ES AC156. Testing shall be performed with
all fluids at worst case normal levels.[ Water shall be substituted for diesel fuel in fuel
tank during test.]
Component Importance Factor: [1.5] [1.0].
NFPA Compliance:
1.
2.
3.
4.
Comply with NFPA 37.
Comply with NFPA 70.
Comply with NFPA 99.
Comply with NFPA 110 requirements for Level [1] [2] emergency power supply system.
C.
UL Compliance: Comply with UL 2200/CSA.
D.
Engine Exhaust Emissions: Comply with EPA Tier requirements and applicable state and local
government requirements.
E.
Noise Emission: Comply with [applicable state and local government requirements] <Insert
Project criteria> for maximum noise level at [adjacent property boundaries] <Insert critical
locations> due to sound emitted by generator set including engine, engine exhaust, engine
cooling-air intake and discharge, and other components of installation.
ENGINE GENERATORS
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F.
Environmental Conditions: Engine-generator system shall withstand the following
environmental conditions without mechanical or electrical damage or degradation of
performance capability:
1.
2.
3.
G.
Unusual Service Conditions: Engine-generator equipment and installation are required to
operate under the following conditions:
1.
2.3
Ambient Temperature: [5 to 40 deg C for spark-ignited] [Minus 15 to plus 50 deg C
for diesel-fired and bifuel].
Relative Humidity: Zero to 95 percent.
Altitude: Sea level to [1000 feet (300 m)] <Insert altitude>.
[High salt-dust content in the air due to sea-spray evaporation] <Insert unusual
condition>.
ASSEMBLY DESCRIPTION
A.
Factory-assembled and -tested, water-cooled engine, with brushless generator and accessories.
B.
Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by
a testing agency acceptable to authorities having jurisdiction, and marked for intended location
and application.
C.
EPSS Class: Engine-generator set shall be classified as a [Class 2] [Class 6] [Class 48]
[Class 96] <Insert Classification> in accordance with NFPA 110.
D.
Governor: Adjustable isochronous, with speed sensing.
E.
Emissions: Comply with EPA Tier and local requirements for standby [or mission critical
continuous] generation.
F.
Mounting Frame: Structural steel framework to maintain alignment of mounted components
without depending on concrete foundation. Provide lifting attachments sized and spaced to
prevent deflection of base during lifting and moving.
1.
G.
Rigging Diagram: Inscribed on metal plate permanently attached to mounting frame to
indicate location and lifting capacity of each lifting attachment and generator-set center
of gravity.
Capacities and Characteristics:
1.
2.
3.
Power Output Ratings: Nominal ratings as indicated at 0.8 power factor excluding power
required for the continued and repeated operation of the unit and auxiliaries[, with
capacity as required to operate as a unit as evidenced by records of prototype
testing].
Output Connections: Three-phase, [three] [four] wire.
Nameplates: For each major system component to identify manufacturer's name and
address, and model and serial number of component. Nameplate shall be in accordance
with NFPA70.
ENGINE GENERATORS
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H.
Generator-Set Performance:
1.
Oversizing alternator compared with the rated power output of the engine is permissible
to meet specified performance.
a.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Steady-State Voltage Operational Bandwidth: 1 percent of rated output voltage from no
load to full load.
Transient Voltage Performance: Not more than 20 percent variation for 50 percent stepload increase or decrease. Voltage shall recover and remain within the steady-state
operating band within 5 seconds.
Steady-State Frequency Operational Bandwidth: Plus or minus 0.25 percent of rated
frequency from no load to full load.
Steady-State Frequency Stability: When system is operating at any constant load within
the rated load, there shall be no random speed variations outside the steady-state
operational band and no hunting or surging of speed.
Transient Frequency Performance: Less than 5-Hz variation for 50 percent step-load
increase or decrease. Frequency shall recover and remain within the steady-state
operating band within 5 seconds.
Output Waveform: At no load, harmonic content measured line to neutral shall not
exceed 2 percent total with no slot ripple. Telephone influence factor, determined
according to NEMA MG 1, shall not exceed 50 percent.
Sustained Short-Circuit Current: For a three-phase, bolted short circuit at system output
terminals, system shall supply a minimum of 300 percent of rated full-load current for not
less than 10 seconds and then clear the fault automatically, without damage to winding
insulation or other generator system components.
Block Load Performance: per NFPA110, the unit shall be able to fully recover from a
100% block load.
Excitation System: Performance shall be unaffected by 10% total voltage distortion
(THD) caused by nonlinear load.
a.
11.
I.
Nameplate Data for Oversized Generator: Show ratings required by the Contract
Documents rather than ratings that would normally be applied to generator size
installed.
Provide permanent magnet excitation (PMG) for power source to voltage
regulator.
Start Time: Comply with NFPA 110, Type 10, system requirements.
Parallel Engine Generators:
1.
2.
3.
4.
5.
6.
Automatic reactive output power control and load sharing between generator sets
operated in parallel.
Automatic regulation, automatic connection to a common bus, and automatic
synchronization, with manual controls and instruments to monitor and control paralleling
functions.
Secondary automatic paralleling functionality in case of loss of data communications
and/or load sharing lines.
Protective relays required for equipment and personnel safety.
Paralleling suppressors to protect excitation systems.
Reverse power protection.
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7.
2.4
Loss of field protection.
ENGINE
A.
Fuel: [Diesel Fuel oil, Grade DF-2, Ultra Low Sulfur] [Natural gas with automatic LP-gas
backup] [Combined diesel fuel oil, Grade DF-2and natural gas] [Natural gas] [LP gas].
1.
ASTM D 975 or ASTM D 396 for Ultra Lower Sulfur Diesel.
2.
Biodiesel fuel is not recommended.
B.
Engine Rating: Prime mover shall have adequate horsepower to meet the specified kW at the
specified site altitude and temperatures. Products that de-rate below specified kW for
temperature or altitude shall not be accepted.
C.
Maximum Piston Speed for Four-Cycle Engines: 2250 fpm (11.4 m/s).
D.
Lubrication System: The following items are mounted on engine or skid:
1.
2.
3.
Filter and Strainer: Per manufacturer recommendations.
Thermostatic Control Valve: Control flow in system to maintain optimum oil
temperature. Unit shall be capable of full flow and is designed to be fail-safe.
Crankcase Drain: Arranged for complete gravity drainage to an easily removable
container with no disassembly and without use of pumps, siphons, special tools, or
appliances.
E.
Jacket Coolant Heater: Electric-immersion type, factory installed in coolant jacket system.
Comply with NFPA 110 requirements for Level 1 equipment for heater capacity.
F.
Cooling System: Closed loop, liquid cooled, with radiator factory mounted on engine-generatorset mounting frame and integral engine-driven coolant pump.
1.
Coolant: Solution of 50 percent ethylene-glycol-based antifreeze and 50 percent water,
with anticorrosion additives as recommended by engine manufacturer.
2.
Cooling System Sizing: Sized to adequately cool the generator set, including aftercooler,
without de-rate to an ambient temperature of [122 deg F (50 deg C) for diesel] [104 deg
F (40 deg C) for gas]. Maximum external restriction shall be no greater than 0.5 inch
(12.7 mm) of water column.
Size of Radiator: Adequate to contain expansion of total system coolant from cold start to
110 percent load condition.
Expansion Tank: Constructed of welded steel plate and rated to withstand maximum
closed-loop coolant system pressure for engine used. Equip with gage glass and petcock.
Temperature Control: Self-contained, thermostatic-control valve modulates coolant flow
automatically to maintain optimum constant coolant temperature as recommended by
engine manufacturer.
Coolant Hose: Flexible assembly with inside surface of nonporous rubber and outer
covering of aging-, ultraviolet-, and abrasion-resistant fabric.
3.
4.
5.
6.
ENGINE GENERATORS
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a.
b.
G.
Cooling System: Closed loop, liquid cooled, with remote radiator and [integral engine-driven]
[auxiliary] coolant pump. Comply with requirements in Section 232113 "Hydronic Piping" for
coolant piping.
1.
2.
3.
4.
5.
6.
7.
H.
Minimum sound attenuation of 32 dB(A) at 500 Hz.
Sound level measured at a distance of 23 feet (7 m) from exhaust discharge after
installation is complete shall be [72] <Insert number> dB(A) or less.
Muffler/Silencer: Critical type, sized as recommended by engine manufacturer and selected
with exhaust piping system to not exceed engine manufacturer's engine backpressure
requirements.
1.
2.
J.
Configuration: [Vertical] [Horizontal] air discharge.
Radiator Core Tubes: [Aluminum] [Nonferrous-metal construction other than
aluminum].
Size of Radiator: Adequate to contain expansion of total system coolant from cold start to
110 percent load condition.
Expansion Tank: Constructed of welded steel plate and rated to withstand maximum
closed-loop coolant system pressure for engine used. Equip with gage glass and petcock.
Fan: Driven by [multiple belts from engine shaft] [totally enclosed electric motor
with sealed bearings].
Coolant: Solution of 50 percent ethylene-glycol-based antifreeze and 50 percent water,
with anticorrosion additives as recommended by engine manufacturer.
Temperature Control: Self-contained, thermostatic-control valve modulates coolant flow
automatically to maintain optimum constant coolant temperature as recommended by
engine manufacturer.
Muffler/Silencer: Hospital type, sized as recommended by engine manufacturer and selected
with exhaust piping system to not exceed engine manufacturer's engine backpressure
requirements.
1.
2.
I.
Rating: 50-psig (345-kPa) maximum working pressure with coolant at 180 deg F
(82 deg C), and noncollapsible under vacuum.
End Fittings: Flanges or steel pipe nipples with clamps to suit piping and
equipment connections.
Minimum sound attenuation of 25 dB(A) at 500 Hz.
Sound level measured at a distance of 23 feet (7 m) from exhaust discharge after
installation is complete shall be [78] <Insert number> dB(A) or less.
Muffler/Silencer: Semicritical type, sized as recommended by engine manufacturer and selected
with exhaust piping system to not exceed engine manufacturer's engine backpressure
requirements.
1.
2.
Minimum sound attenuation of 18 dB(A) at 500 Hz.
Sound level measured at a distance of 23 feet (7 m) from exhaust discharge after
installation is complete shall be [85] <Insert number> dB(A) or less.
K.
Air-Intake Filter: Engine-mounted air cleaner with replaceable dry-filter element.
L.
Starting System: [12] [24]-V electric, with negative ground.
ENGINE GENERATORS
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1.
2.
3.
4.
5.
6.
7.
8.
Components: Sized so they are not damaged during a full engine-cranking cycle with
ambient temperature at maximum specified in "Performance Requirements" Article.
Cranking Motor: Heavy-duty unit that automatically engages and releases from engine
flywheel without binding.
Cranking Cycle: As required by NFPA 110 for system level specified.
Battery: Lead acid, certified to meet NFPA110, with capacity within ambient temperature
range specified in "Performance Requirements" Article to provide specified cranking
cycle at least [twice] [three times] without recharging.
Battery Cable: Size as recommended by engine manufacturer for cable length indicated.
Include required interconnecting conductors and connection accessories.
Battery Compartment: Factory fabricated of metal with acid-resistant finish and thermal
insulation. Thermostatically controlled heater shall be arranged to maintain battery above
10 deg C regardless of external ambient temperature within range specified in
"Performance Requirements" Article. Include accessories required to support and fasten
batteries in place. Provide ventilation to exhaust battery gases.
Battery-Charging Alternator: Factory mounted on engine with solid-state voltage
regulation and continuous rating adequate for the batteries provided.
Battery Charger: Current-limiting, automatic-equalizing and float-charging type designed
for lead-acid batteries. Unit shall comply with UL 1236 and include the following
features:
a.
b.
c.
d.
e.
f.
g.
2.5
Operation: Equalizing-charging rate of 10 A shall be initiated automatically after
battery has lost charge until an adjustable equalizing voltage is achieved at battery
terminals. Unit shall then be automatically switched to a lower float-charging
mode and shall continue to operate in that mode until battery is discharged again.
Automatic Temperature Compensation: Adjust float and equalize voltages for
variations in ambient temperature from minus 40 deg F (minus 40 deg C) to 140
deg F (plus 60 deg C) to prevent overcharging at high temperatures and
undercharging at low temperatures.
Automatic Voltage Regulation: Maintain constant output voltage regardless of
input voltage variations up to plus or minus 10 percent.
Ammeter and Voltmeter: Flush mounted in door. Meters shall indicate charging
rates.
Safety Functions: Sense abnormally low battery voltage and close contacts
providing low battery voltage indication on control and monitoring panel. Sense
high battery voltage and loss of ac input or dc output of battery charger. Either
condition shall close contacts that provide a battery-charger malfunction indication
at system control and monitoring panel.
Enclosure and Mounting: NEMA 250, Type 1, wall-mounted cabinet with
adequate vibration isolation if mounted within the generator set.
Battery chargers mounted within the Automatic Transfer Switch are not
acceptable.
DIESEL FUEL-OIL SYSTEM
A.
Comply with NFPA 30.
B.
Piping: Fuel-oil piping shall be Schedule 40 black steel, complying with requirements in
Section 231113 "Facility Fuel-Oil Piping." Cast iron, aluminum, copper, and galvanizing shall
not be used in the fuel-oil system.
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C.
Main Fuel Pump: Mounted on engine to provide primary fuel flow under starting and load
conditions.
D.
Fuel Filtering: Primary fuel filter to remove water and contaminants larger than 10 micron.
Secondary filter to remove contaminants larger than 2 micron. .
E.
Relief-Bypass Valve: Automatically regulates pressure in fuel line and returns excess fuel to
source.
F.
Fuel-Oil Storage Tank: Comply with requirements in Section 231313 "Facility Underground
Fuel-Oil Storage Tanks" or Section 231323 "Facility Aboveground Fuel-Oil Storage Tanks."
1.
2.
G.
Fuel Tank Capacity: Minimum 133 percent of total fuel required for low-fuel level sensor
quantity or required for the indicated EPSS Class.
Duplex Fuel-Oil Transfer Pump: Comply with requirements in Section 231213 "Facility
Fuel-Oil Pumps."
Day Tank: Comply with UL 142, freestanding, factory-fabricated fuel tank assembly, with
integral, float-controlled transfer pump and the following features:
1.
Containment: Integral rupture basin with a capacity of 150 percent of nominal capacity of
day tank.
a.
2.
3.
4.
5.
6.
7.
H.
Leak Detector: Locate in rupture basin and connect to provide audible and visual
alarm in the event of day-tank leak.
Tank Capacity:[ As recommended by engine manufacturer for an uninterrupted
period of 4 hours' operation at 100 percent of rated power output of enginegenerator system without being refilled] <Insert gallons (liters)>.
Pump Capacity: Exceeds maximum flow of fuel drawn by engine-mounted fuel supply
pump at 110 percent of rated capacity, including fuel returned from engine.
Low-Level Alarm Sensor: shall be provided, in accordance with NFPA110, to indicate
when less than the minimum fuel necessary for full load running, as required by the
specified EPSS class.
High-Level Alarm Sensor: Liquid-level device operates alarm and redundant fuel shutoff
contacts at midpoint between overflow level and 100 percent of normal fuel level.
Piping Connections: Factory-installed fuel supply and return lines from tank to engine;
local fuel fill, vent line, overflow line; and tank drain line with shutoff valve.
Redundant High-Level Fuel Shutoff: Actuated by high-level alarm sensor in day tank to
operate a separate motor control device that disconnects day-tank pump motor. Sensor
shall signal solenoid valve, located in fuel suction line between fuel storage tank and day
tank, to close. Both actions shall remain in shutoff state until manually reset. Shutoff
action shall initiate an alarm signal to control panel but shall not shut down enginegenerator set.
Subbase-Mounted, Double-Wall, Fuel-Oil Tank: Factory installed and piped, complying with
UL 142 fuel-oil tank. Features include the following:
1.
Tank Bottom: Sloped bottom to remove particulates and other fuel-borne contaminants
from the fuel intake to the engine.
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2.
Tank Top: Sloped top to prevent standing water.
3.
4.
Electric tank level indicator with digital readout on control panel.
Low Fuel Sensing Switch: shall be provided, in accordance with NFPA110, to indicate
when less than the minimum fuel necessary for full load running, as required by the
specified EPSS class.
Fuel-Tank Capacity: Minimum 133 percent of total fuel required for low-fuel sensor
quantity or for the hours of continuous operation for indicated EPSS class.
Leak detection in interstitial space.
Vandal-resistant fill cap.
Containment Provisions: Comply with requirements of authorities having jurisdiction.
Tank shall be production tested to 2 psi (13.8 kPa).
5.
6.
7.
8.
9.
2.6
GASEOUS FUEL SYSTEM
A.
Natural-Gas Piping: Comply with requirements in Section 231123 "Facility Natural-Gas
Piping" and with requirements of NFPA37 and 54.
1.
2.
3.
4.
Gas piping is the responsibility of the installing contractor.
Gas piping shall be sized to provide adequate fuel to the engine while allowing for no
greater than 1 inch (25 mm) water column pressure drop from no load to full load.
Natural gas piping will supply pressure to the generator set inlet per manufacturer's
recommendations, nominally 11 to 14 inches (279.4 to 356 mm) of water column.
Natural gas regulator shall be sized to provide 125 percent of full-load generator set
capacity.
B.
LP-Gas Piping: Comply with requirements in Section 231126 "Facility Liquefied-Petroleum
Gas Piping."
C.
Gas Train: Comply with NFPA 37.
D.
Engine Fuel System:
1.
[Dual Natural-Gas with LP-Gas Backup] [Natural-Gas] [LP-Gas], Vapor-Withdrawal
System:
a.
b.
c.
d.
e.
f.
g.
h.
Carburetor.
Secondary Gas Regulators: One for each fuel type, with atmospheric vents piped to
building exterior.
Fuel-Shutoff Solenoid Valves: NRTL-listed, normally closed, safety shutoff
valves; one for each fuel source.
Fuel Filters: One for each fuel type.
Manual Fuel Shutoff Valves: One for each fuel type.
Flexible Fuel Connectors: Minimum one for each fuel connection.
LP-gas flow adjusting valve.
Fuel change gas pressure switch.
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2.7
CONTROL AND MONITORING
A.
Automatic Starting System Sequence of Operation: When mode-selector switch on the control
and monitoring panel is in the automatic position, remote-control contacts in one or more
separate automatic transfer switches initiate starting and stopping of generator set. When modeselector switch is switched to the manual position, generator set starts. The off position of same
switch initiates generator-set shutdown. When generator set is running, specified system or
equipment failures or derangements automatically shut down generator set and initiate alarms.
B.
Manual Starting System Sequence of Operation: Switching on-off switch on the generator
control panel to the manual position starts generator set. The off position of same switch
initiates generator-set shutdown. When generator set is running, specified system or equipment
failures or derangements automatically shut down generator set and initiate alarms.
C.
Provide minimum run time control set for [15] [30] <Insert number> minutes with override
only by operation of a remote emergency-stop switch.
D.
Comply with UL 508A.
E.
Configuration: Operating and safety indications, protective devices, basic system controls, and
engine gages shall be grouped in a common control and monitoring panel mounted on the
generator set. Mounting method shall isolate the control panel from generator-set vibration.
Panel shall be powered from the engine-generator set battery.
1.
Engine and generator control wiring shall be multi-stranded annealed copper conductors
encased by cross-linked polyethylene insulation resistant to heat, abrasion, oil, water,
diesel fuel, and antifreeze. Wiring shall be suitable for continuous use at 250 deg F (121
deg C) with insulation not brittle at minus 60 deg F (minus 51 deg C). Cables shall be
enclosed in nylon flexible conduit, which is slotted to allow easy access and moisture to
escape.
a.
b.
2.
3.
Engines that are equipped with an electronic engine control module (ECM), shall
monitor and control engine functionality and seamlessly integrate with the
generator set controller through digital communications. ECM monitored
parameters shall be integrated into the genset controllers NFPA 110 alarm and
warning requirements.
For engines without ECM functionality or for any additional generator set
controller monitoring, sensors are to be conditioned to a 4 to 20 ma signal level to
enhance noise immunity and all sensor connections shall be sealed to prevent
corrosion.
Construction: All circuitry within the control panel shall be individually environmentally
sealed to prevent corrosion. Encapsulated circuit boards with surface mounted
components and sealed, automotive-style connectors for sensors and circuit board
connectors. Enclosed circuit boards and terminal strips that are susceptible to corrosion
are not acceptable.
Custom ladder logic functionality inside the generator controller shall be supported to
provide application support flexibility. The ladder logic function shall have access to all
the controller inputs and customer assignable outputs.
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F.
Indicating Devices: As required by NFPA 110 for Level [1] [2] system. All ECM fault codes
shall be displayed at the generator set controller in standard language; fault code numbers are
not acceptable. Utilizing a digital display, including the following:
1.
2.
3.
4.
5.
6.
7.
8.
9.
G.
AC voltage: True three-phase sensing.
AC current.
Frequency.
EPS supplying load indicator.
DC voltage (alternator battery charging).
Engine-coolant temperature.
Engine lubricating-oil pressure.
Running-time meter.
Current and Potential Transformers: Instrument accuracy class.
Protective Devices and Controls in Local Control Panel: Shutdown devices and common visual
alarm indication as required by NFPA 110 for Level [1] [2] system, including the following:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
Start-stop switch.
Overcrank shutdown device.
Overspeed shutdown device.
Coolant high-temperature shutdown device.
Coolant low-level shutdown device.
Low lube oil pressure shutdown device.
Overcrank alarm.
Overspeed alarm.
Coolant high-temperature alarm.
Coolant low-temperature alarm.
Coolant low-level alarm.
Low lube oil pressure alarm.
Lamp test.
Contacts for local and remote common alarm.
Coolant high-temperature prealarm.
Generator-voltage; digitally adjustable via controller, password protected.
Main fuel tank low-level alarm.
a.
18.
19.
20.
21.
22.
23.
24.
H.
Low fuel level alarm shall be initiated when the level falls below that required for
operation for the duration required in "Fuel Tank Capacity" Paragraph in "Diesel
Fuel-Oil System" Article.
Run-Off-Manual selector switch.
Control switch not in automatic position alarm.
Low cranking voltage alarm.
Battery-charger malfunction alarm.
Battery low-voltage alarm.
Battery high-voltage alarm.
Generator overcurrent protective device not closed alarm.
Supporting Items: Include sensors, transducers, terminals, relays, and other devices and include
wiring required to support specified items. Locate sensors and other supporting items on engine
or generator, unless otherwise indicated. Sensors are to be conditioned to a 4 to 20 mA signal
level to enhance noise immunity and all sensor connections shall be sealed to prevent corrosion.
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I.
Connection to Datalink: Provide connections for datalink transmission of indications to remote
data terminals via [ModBus RS232] [ModBus RS485] <Insert other data protocol>. Data
system connections to terminals are covered in Section 260913 "Electrical Power Monitoring
and Control."
J.
Remote Alarm Annunciator: Comply with NFPA 99. An LED labeled with proper alarm
conditions shall identify each alarm event, and a common audible signal shall sound for each
alarm condition. Silencing switch in face of panel shall silence signal without altering visual
indication. Connect so that after an alarm is silenced, clearing of initiating condition will
reactivate alarm until silencing switch is reset. Cabinet and faceplate are surface- or flushmounting type to suit mounting conditions indicated.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
Overcrank alarm.
Coolant low-temperature alarm.
High engine temperature prealarm.
High engine temperature alarm.
Low lube oil pressure alarm.
Overspeed alarm.
Low fuel main tank alarm.
Low coolant level alarm.
Low cranking voltage alarm.
Contacts for local and remote common alarm.
Audible-alarm silencing switch.
Control switch not in automatic position alarm.
Fuel tank derangement alarm.
Fuel tank high-level shutdown of fuel supply alarm.
Lamp test.
Low cranking voltage alarm.
Generator overcurrent protective device not closed.
K.
The control system shall provide pre-wired customer use I/O: 4 relay outputs (user definable
functions), 4 contact inputs, 2 analog inputs, communications support via RS232, RS485, or an
optional modem. Additional I/O must be an available option. Customer I/O shall be software
configurable providing full access to all alarm, event, data logging, and shutdown functionality.
L.
Supporting Items: Include sensors, transducers, terminals, relays, and other devices and include
wiring required to support specified items. Locate sensors and other supporting items on engine
or generator, unless otherwise indicated.
M.
Remote Emergency-Stop Switch: Flush; wall mounted, unless otherwise indicated; and labeled.
Push button shall be protected from accidental operation.
N.
Parallel Engine Generator Sets:
1.
The controller shall be integral to the generator set and capable of automatically
synchronizing and paralleling generator set to a common bus without use of external
controllers of operators. Paralleling controls shall be standard manufacturer controller,
factory tested prior to shipment to jobsite. Paralleling functions shall include:
a.
b.
Automatic paralleling via system controller.
Automatic paralleling via two-wire initiated start.
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c.
2.
Paralleling features include:
a.
b.
c.
d.
e.
f.
g.
3.
Dead bus arbitration.
Automatic synchronization at each generator.
Real and reactive load sharing.
Permissive/Load add relay function.
Load shed relay function.
Optional accessory controller providing redundant load sequencing (load/add/shed)
function.
Retain the ability parallel generators automatically with a loss of data
communication and/or load share lines.
Sequence of operation:
a.
b.
c.
O.
Manually initiated paralleling with automatic synchronization.
After loss of utility, the automatic transfer switch(es) (ATS) shall send a group
start signal to the generator set system. Each generator set in the system shall
automatically start and accelerate to rated speed and voltage. The first generator set
to reach rated speed and voltage shall automatically close its paralleling switch,
energizing the generator bus. At this point, the first priority permissive signal shall
be enabled, allowing generator loads to be energized. Each additional generator set
in the system shall automatically drive the output voltage, frequency, and phase to
match the bus, and close the generator paralleling switch once the conditions have
been met. As each subsequent generator is brought on-line, an additional
permissive signal shall be enabled, allowing additional loads to be added to the
bus.
Once all generator sets are on-line, the paralleling system controller shall actively
monitor real (kW) and reactive (kVA) load requirements of the system, and adjust
the generator set output to maintain balanced loading.
Once utility power has been restored, the ATS shall remove the group start signal.
The generator set will enter cooldown mode. At the expiration of the cooldown
timer, the generator set shall open the paralleling switch and automatically
shutdown.
Maintenance:
1.
All engine, voltage regulator, control panel, and accessory units shall be accessible
through a single electronic service tool. The following maintenance functionality shall be
integral to the generator set controls:
a.
b.
c.
d.
e.
f.
g.
Engine running hours.
Service maintenance interval (running hours, calendar days).
Engine crank attempt counter.
Engine successful starts counter.
20 events are stored in control panel memory.
Control panel shall time and date stamp all alarms and warnings. A snap shot of
key parameters shall be saved in the control panel for use in troubleshooting
alarms.
A predictive maintenance algorithm will determine the optimal time for
maintenance service based on the generator loading and operation.
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P.
Programmable Cycle Timer: To start and run the generator for a predetermined time. The timer
shall use 14 user-programmable sequences that are repeated in a 7-day cycle. Each sequence
shall have the following programmable set points:
1.
2.
3.
4.
Q.
Monitoring Software: Provide monitoring software capable of communicating to no less than 15
generator sets. Software shall be connectable via RS232 connection directly on the generator
control panel. Software functionality to include:
1.
2.
3.
4.
2.8
Day of the week.
Time of the day start.
Duration of cycle.
Option to exercise at reduced speed for quiet test mode.
Display generator set operating parameters including necessary pressures and
temperatures, electrical output, fuel level.
Ability to program custom I/O alarms as well as modify standard alarm settings for
applications (password protected).
Data logging and trending of up to 15 parameters, user selectable, for testing,
troubleshooting, and record keeping.
High speed data logging and trending of up to 0.2 millisecond providing sine wave
visibility for testing and identification of harmonic distortion levels.
GENERATOR OVERCURRENT AND FAULT PROTECTION
A.
Overcurrent protective devices for the entire EPSS shall be coordinated to optimize selective
tripping when a short circuit occurs. Coordination of protective devices shall consider both
utility and EPSS as the voltage source.
1.
B.
Generator Circuit Breaker: Molded-case, thermal-magnetic type; 80 percent rated; complying
with UL 489.
1.
2.
3.
4.
C.
Overcurrent protective devices for the EPSS shall be accessible only to authorized
personnel and each located in a separate box per NEC700 separation of circuits.
Tripping Characteristic: Designed specifically for generator protection.
Trip Rating: Matched to generator output rating.
Shunt Trip: Connected to trip breaker when generator set is shut down by other protective
devices.
Mounting: Each circuit breaker installed in separate box in accordance with NEC700
separation of circuits.
Generator Circuit Breaker: Molded-case, thermal-magnetic type; 100 percent rated; complying
with UL 489.
1.
2.
3.
4.
Tripping Characteristic: Designed specifically for generator protection.
Trip Rating: Matched to generator output rating.
Shunt Trip: Connected to trip breaker when generator set is shut down by other protective
devices.
Mounting: Each circuit breaker installed in separate box in accordance with NEC700
separation of circuits.
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D.
Generator Circuit Breaker: Molded-case, electronic-trip type; 100 percent rated; complying with
UL 489.
1.
2.
3.
4.
E.
Generator Circuit Breaker: Insulated-case, electronic-trip type; 100 percent rated; complying
with UL 489.
1.
2.
3.
4.
F.
Trip Rating: Matched to generator output rating.
Shunt Trip: Connected to trip switch when signaled by generator protector or by other
protective devices.
Generator Protector: Microprocessor-based unit shall continuously monitor current level in each
phase of generator output, integrate generator heating effect over time, and predict when
thermal damage of alternator will occur. When signaled by generator protector or other
generator-set protective devices, a shunt-trip device in the generator disconnect switch shall
open the switch to disconnect the generator from load circuits. Protector performs the following
functions:
1.
2.
3.
4.
H.
Tripping Characteristics: Adjustable long-time and short-time delay and instantaneous.
Trip Settings: Selected to coordinate with generator thermal damage curve.
Shunt Trip: Connected to trip breaker when generator set is shut down by other protective
devices.
Mounting: Each circuit breaker installed in separate box in accordance with NEC700
separation of circuits.
Generator Disconnect Switch: Molded-case type, 100 percent rated.
1.
2.
G.
Tripping Characteristics: Adjustable long-time and short-time delay and instantaneous.
Trip Settings: Selected to coordinate with generator thermal damage curve.
Shunt Trip: Connected to trip breaker when generator set is shut down by other protective
devices.
Mounting: Each circuit breaker installed in separate box in accordance with NEC700
separation of circuits.
Initiates a generator overload alarm when generator has operated at an overload
equivalent to 110 percent of full-rated load for 60 seconds. Indication for this alarm is
integrated with other generator-set malfunction alarms. Contacts shall be available for
load shed functions.
Under single or three-phase fault conditions, regulates generator to 300 percent of rated
full-load current for up to 10 seconds.
As overcurrent heating effect on the generator approaches the thermal damage point of
the unit, protector switches the excitation system off, opens the generator disconnect
device, and shuts down the generator set.
Senses clearing of a fault by other overcurrent devices and controls recovery of rated
voltage to avoid overshoot.
Ground-Fault Indication: Comply with NFPA 70, "Emergency System" signals for ground fault.
1.
2.
Indicate ground fault with other generator-set alarm indications.
Trip generator protective device on ground fault.
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2.9
GENERATOR, EXCITER, AND VOLTAGE REGULATOR
A.
Comply with NEMA MG 1 and UL2200, sized for 248 deg F (120 deg C) temperature rise
above ambient at rated load.
B.
Drive: Generator shaft shall be directly connected to engine shaft. Exciter shall be rotated
integrally with generator rotor.
C.
Electrical Insulation: Class H.
D.
Stator-Winding Leads: Brought out to terminal box to permit future reconnection for other
voltages if required. Provide [six] [12] lead alternator.
E.
Winding Coils: Skewed to improve sine wave shape and eliminate ripple effects caused by air
gaps.
F.
Range: Provide broad range of output voltage by adjusting the excitation level.
G.
Construction shall prevent mechanical, electrical, and thermal damage due to vibration,
overspeed up to 125 percent of rated speed, and heat during operation at 110 percent of rated
capacity.
H.
Enclosure: Dripproof.
I.
Instrument Transformers: Mounted within generator enclosure.
J.
Voltage Regulator: Solid-state type on a sealed circuit board, separate from exciter, providing
performance as specified and as required by NFPA 110. Must be 3-phase sensing.
1.
2.
Voltage Adjustment on Control and Monitoring Panel: Provide plus or minus 5 percent
adjustment of output-voltage operating band.
Provide anti-hunt provision to stabilize voltage.
K.
Strip Heater: Thermostatically controlled unit arranged to maintain stator windings above dew
point.
L.
Windings: Two-thirds pitch stator winding and fully linked amortisseur winding.
M.
Subtransient Reactance: [15] <Insert number> percent, maximum.
N.
Excitation: Permanent magnet (PMG) type providing 300 percent current output for up to 10
seconds to a downstream breaker selective coordination and improved motor starting.
2.10
A.
LOAD BANK
Description: Permanent, outdoor, weatherproof, remote-controlled, forced-air-cooled,
[resistive] [resistive and reactive] unit capable of providing a balanced three-phase, deltaconnected load to generator set at [100] <Insert number> percent rated-system capacity, at
[80] <Insert number> percent power factor, lagging.[ Unit may contain separate resistive
and reactive load banks controlled by a common control panel.] Unit shall be capable of
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selective control of load in 25 percent steps and with minimum step changes of approximately 5
and 10 percent available.
B.
Resistive Load Elements: Corrosion-resistant chromium alloy with
supports. Elements shall be double insulated and designed for
Elements shall be mounted in removable aluminized-steel heater
prohibited. Element's maximum resistance shall be between 100
resistance.
C.
Reactive Load Elements: Epoxy-encapsulated reactor coils.
D.
Load-Bank Heat Dissipation: Integral fan with totally enclosed motor shall provide uniform
cooling airflow through load elements. Airflow and coil operating current shall be such that, at
maximum load, with ambient temperature at the upper end of specified range, load-bank
elements operate at not more than 50 percent of maximum continuous temperature rating of
resistance elements.
E.
Load-Element Switching: Remote-controlled contactors switch groups of load elements.
Contactor coils are rated 120 V. Contactors shall be located in a separate NEMA 250, Type 3R
enclosure within load-bank enclosure, accessible from exterior through hinged doors with
tumbler locks.
F.
Contactor Enclosures: Heated by thermostatically controlled strip heaters to prevent
condensation.
G.
Load-Bank Enclosures: NEMA 250, Type 3R, aluminized steel complying with NEMA ICS 6.
Louvers at cooling-air intake and discharge openings shall prevent entry of rain and snow.
Openings for airflow shall be screened with 1/2-inch- (13-mm-) square, galvanized-steel mesh.
Reactive load bank shall include automatic shutters at air intake and discharge. Components
other than resistive elements shall receive exterior epoxy coating with compatible primer.
Comply with requirements in Section 099600 "High Performance Coatings."
H.
Protective Devices: Power input circuits to load banks shall be fused, and fuses shall be selected
to coordinate with generator circuit breaker. Fuse blocks shall be located in contactor enclosure.
Cooling airflow and overtemperature sensors shall automatically shut down and lock out load
bank until manually reset. Safety interlocks on access panels and doors shall disconnect load
power, control, and heater circuits. Fan motor shall be separately protected by overload and
short-circuit devices. Short-circuit devices shall be noninterchangeable fuses with 200,000 A
interrupting capacity.
I.
Remote-Control Panel: Separate from load bank in NEMA 250, Type 1 enclosure with a control
power switch and pilot light, and switches controlling groups of load elements.
J.
Control Sequence: Control panel may be preset for adjustable single-step loading of generator
during automatic exercising.
2.11
A.
ceramic and stainless-steel
repetitive on-off cycling.
cases. Galvanized steel is
and 105 percent of rated
OUTDOOR GENERATOR-SET ENCLOSURE
Description: OEM Factory manufactured, vandal-resistant, sound-attenuating, weatherproof
steel housing, wind resistant up to 100 mph (160 km/h). Multiple panels shall be lockable and
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provide adequate access to components requiring maintenance. Panels shall be removable by
one person without tools. Instruments and control shall be mounted within enclosure.
1.
2.
3.
4.
5.
6.
7.
8.
9.
B.
Sound Attenuation: Factory enclosure, designed to meet the following design criteria:
1.
2.
3.
C.
Structural Design and Anchorage: Comply with ASCE 7 for wind loads up to [100 mph
(160 km/h)] [180 mph (290 km/h)].
Seismic Design: Comply with seismic requirements in Section 260548.16 "Seismic
Controls for Electrical Systems."
Fire Protection: Provide fire protection in accordance with [Section 211316 "Dry-Pipe
Sprinkler Systems."] [Section 211313 "Wet-Pipe Sprinkler Systems."] Provide
smoke detector in enclosure; mounted according to NFPA 72.
Hinged Doors:
a.
Door Panels: With integral stiffeners, and capable of being removed by one person
without tools.
b.
Slip-pin Hinges and Latches Stainless steel with nylon spacers.
c.
Gasketed for weather and rodent protection.
d.
Handles to have padlocking provisions.
Space Heater: Thermostatically controlled and sized to prevent condensation. Provide as
needed to meet NFPA110, Level 1 temperature levels.
Lighting: Provide weather resistant [fluorescent] [LED] lighting with [30 footcandles
((330 LUX))] [50 footcandles ((550 LUX))] average maintained.
Thermal Insulation: Manufacturer's standard materials and thickness selected in
coordination with space heater to maintain winter interior temperature within operating
limits required by engine-generator-set components.
Muffler Location: [Within] [External to] enclosure. All exhaust piping shall be wrapped
for personnel protection and to eliminate excessive heat build up during generator
operation.
Assembly Hardware (Nuts and Bolts): Use JS500 and nylon washers to prevent paint
deterioration.
Weather protective enclosure limiting sound emissions to 85 dB(A) at 23 ft (7 m) in a
free field environment
Sound Attenuated Level One enclosure designed to meet 80 dB(A) at 23 ft (7 m) in a free
field environment. Enclosure shall have intake and discharge hoods, as needed to reduce
the mechanical and exhaust noise to an acceptable level.
Sound Attenuated Level Two enclosure designed to meet 72 dB(A) in a free field
environment. Enclosure shall have intake and discharge hoods, as well as sound
insulating foam panels within; designed to meet the acceptable sound level. Foam shall
be UL listed for purpose and have a reflective coating allowing for better lighting within
the enclosure.
Engine Cooling Airflow through Enclosure: Maintain temperature rise of system components
within required limits when unit operates at 110 percent of rated load for 2 hours with ambient
temperature at top of range specified in system service conditions.
1.
2.
Louvers: Fixed-engine, cooling-air inlet and discharge. Storm-proof and drainable
louvers prevent entry of rain and snow.
Automatic Dampers: At engine cooling-air inlet and discharge. Dampers shall be closed
to reduce enclosure heat loss in cold weather when unit is not operating.
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D.
Interior Lights with Switch: Factory-wired, vapor-proof fixtures within housing; arranged to
illuminate controls and accessible interior. Arrange for external electrical connection.
1.
2.
E.
2.12
AC lighting system and connection point for operation when remote source is available.
DC lighting system for operation when remote source and generator are both unavailable.
Convenience Outlets: Factory wired, GFCI. Arrange for external electrical connection.
MOTORS
A.
Description: NEMA MG 1, Design B, medium induction random-wound, squirrel cage motor.
B.
Efficiency: Energy efficient, as defined in NEMA MG 1.
C.
Service Factor: 1.15.
D.
Bearings: Regreasable, shielded, antifriction ball bearings suitable for radial and thrust loading.
E.
Motor Sizes: Minimum size as indicated. If not indicated, large enough so driven load will not
require motor to operate in service factor range above 1.0.
F.
Temperature Rise: Match insulation rating.
G.
Code Letter Designation:
1.
2.
Motors [15] <Insert number> HP and Larger: NEMA starting Code F or Code G.
Motors Smaller than [15] <Insert number> HP: Manufacturer's standard starting
characteristic.
H.
Enclosure Material: Cast iron for motor frame sizes 324T and larger; rolled steel for motor
frame sizes smaller than 324T.
I.
Controllers, Electrical Devices, and Wiring: Electrical devices and connections are specified in
electrical Sections.
2.13
A.
VIBRATION ISOLATION DEVICES
Elastomeric Isolator Pads: Oil- and water-resistant elastomer or natural rubber, arranged in
single or multiple layers, molded with a nonslip pattern and galvanized-steel baseplates of
sufficient stiffness for uniform loading over pad area, and factory cut to sizes that match
requirements of supported equipment.
1.
2.
3.
4.
B.
Material: [Standard neoprene] [Natural rubber] [Bridge-bearing neoprene,
complying with AASHTO M 251] separated by steel shims.
Shore "A" Scale Durometer Rating: [30] [40] [45] [50] [60] [65] [70] <Insert number>.
Number of Layers: [One] [Two] [Three] [Four] <Insert number>.
Minimum Deflection: [1 inch (25 mm)] <Insert value>.
Restrained Spring Isolators: Freestanding, steel, open-spring isolators with seismic restraint.
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1.
2.
3.
4.
5.
6.
Housing: Steel with resilient vertical-limit stops to prevent spring extension due to wind
loads or if weight is removed; factory-drilled baseplate bonded to 1/4-inch- (6-mm-)
thick, elastomeric isolator pad attached to baseplate underside; and adjustable equipment
mounting and leveling bolt that acts as blocking during installation.
Outside Spring Diameter: Not less than 80 percent of compressed height of the spring at
rated load.
Minimum Additional Travel: 50 percent of required deflection at rated load.
Lateral Stiffness: More than 80 percent of rated vertical stiffness.
Overload Capacity: Support 200 percent of rated load, fully compressed, without
deformation or failure.
Minimum Deflection: [1 inch (25 mm)] <Insert value>.
C.
Comply with requirements in Section 232116 Hydronic Piping Specialties" for vibration
isolation and flexible connectors materials for steel piping.
D.
Comply with requirements in Section 233113 "Metal Ducts" for vibration isolation and flexible
connector materials for exhaust shroud and ductwork.
E.
Vibration isolation devices shall not be used to accommodate misalignments or to make bends.
2.14
FINISHES
A.
Outdoor Enclosures and Components: Electrostatically applied Rhino Coat finish over
corrosion-resistant pretreatment and compatible primer.
B.
Powdercoated paint surfaces, meeting the following applicable standards:
1.
2.
3.
4.
5.
6.
7.
8.
2.15
A.
SOURCE QUALITY CONTROL
Prototype Testing: Factory test engine-generator set using same engine model, constructed of
identical or equivalent components and equipped with identical or equivalent accessories.
1.
B.
Paint Thickness: More than 2.5 mil per ASTM D 1186-87.
Material Hardness: ASTM D 3363-92a.
Resistance to Cracking: ASTM D 522-B.
Paint Adhesion: ASTM D 3359-B.
Resistance to Salt Water Corrosion: ASTM B 117 or ASTM D 1654.
Resistance to Humidity: ASTM D 1735 or ASTM D 1654.
Impact Resistance: ASTM 2784.
UV Protection: SAE J1690.
Tests: Comply with NFPA 110, Level 1 Energy Converters and with IEEE 115.
Project-Specific Equipment Tests: Before shipment, factory test engine-generator set and other
system components and accessories manufactured specifically for this Project. Perform tests at
rated load and power factor. Include the following tests:
1.
Test components and accessories furnished with installed unit that are not identical to
those on tested prototype to demonstrate compatibility and reliability.
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2.
3.
4.
5.
6.
7.
8.
9.
10.
Test generator, exciter, and voltage regulator as a unit.
Full load run.
Maximum power.
Voltage regulation.
Transient and steady-state governing.
Single-step load pickup.
Safety shutdown.
Provide 14 days' advance notice of tests and opportunity for observation of tests by
Owner's representative.
Report factory test results within 10 days of completion of test.
PART 3 - EXECUTION
3.1
EXAMINATION
A.
Examine areas, equipment bases, and conditions, with Installer present, for compliance with
requirements for installation and other conditions affecting packaged engine-generator
performance.
B.
Examine roughing-in for piping systems and electrical connections. Verify actual locations of
connections before packaged engine-generator installation.
C.
Proceed with installation only after unsatisfactory conditions have been corrected.
3.2
PREPARATION
A.
Interruption of Existing Electrical Service: Do not interrupt electrical service to facilities
occupied by Owner or others unless permitted under the following conditions and then only
after arranging to provide temporary electrical service according to requirements indicated:
1.
2.
3.3
Notify Construction Manager no fewer than [two] <Insert number> working days in
advance of proposed interruption of electrical service.
Do not proceed with interruption of electrical service without Construction Manager's
written permission.
INSTALLATION
A.
Comply with packaged engine-generator manufacturers' written installation and alignment
instructions and with NFPA 110.
B.
Equipment Mounting:
1.
Install packaged engine generators on cast-in-place concrete equipment bases. Comply
with requirements for equipment bases and foundations specified in [Section 033000
"Cast-in-Place Concrete."] [Section 033053 "Miscellaneous Cast-in-Place
Concrete."]
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2.
3.
Coordinate size and location of concrete bases for packaged engine generators[ and
remote radiators mounted on grade]. Cast anchor-bolt inserts into bases. Concrete,
reinforcement, and formwork requirements are specified with concrete.
Coordinate size and location of roof curbs, equipment supports, and roof penetrations for
remote radiators. These items are specified in Section 077200 "Roof Accessories."
C.
Install packaged engine-generator to provide access, without removing connections or
accessories, for periodic maintenance.
D.
Install [packaged engine-generator] [engine-generator in a walk-in enclosure] with
[elastomeric isolator pads] [restrained spring isolators] having a minimum deflection of [1
inch (25 mm)] <Insert static deflection> on 4-inch- (100-mm-) high concrete base. Secure
[sets] [enclosure] to anchor bolts installed in concrete bases. Concrete base construction is
specified in Section 260548.16 "Seismic Controls for Electrical Systems."
E.
Install remote radiator with [elastomeric isolator pads] [restrained spring isolators] on
[concrete base on grade] [roof equipment supports on roof].
F.
Install Schedule 40, black steel piping with welded joints for cooling water piping between
engine-generator set and [heat exchanger] [remote radiator]. Piping materials and installation
requirements are specified in Section 232113 "Hydronic Piping."
1.
2.
G.
Install isolating thimbles where exhaust piping penetrates combustible surfaces. Provide a
minimum of 9 inches (225 mm) clearance from combustibles.
Insulate cooling system piping and components according to requirements in
Section 230719 "HVAC Piping Insulation."
Install Schedule 40, black steel piping with welded joints and connect to engine muffler. Install
thimble at wall. Piping shall be same diameter as muffler outlet.
1.
2.
3.
Install flexible connectors and steel piping materials according to requirements in
Section 232116 Hydronic Piping Specialties."
Insulate muffler/silencer and exhaust system components according to requirements in
Section 230719 "HVAC Piping Insulation."
Install isolating thimbles where exhaust piping penetrates combustible surfaces with a
minimum of 9 inches (225 mm) clearance from combustibles.
H.
Install condensate drain piping to muffler drain outlet full size of drain connection with a
shutoff valve, stainless-steel flexible connector, and Schedule 40, black steel pipe with welded
joints.
I.
Installation requirements for piping materials and flexible connectors are specified in
Section 232116 "Hydronic Piping Specialties." Copper and galvanized steel shall not be used in
the fuel-oil piping system.
J.
Electrical Wiring: Install electrical devices furnished by equipment manufacturers but not
specified to be factory mounted.
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3.4
CONNECTIONS
A.
Piping installation requirements are specified in other Sections. Drawings indicate general
arrangement of piping and specialties.
B.
Connect fuel, cooling-system, and exhaust-system piping adjacent to packaged engine-generator
to allow service and maintenance.
C.
Connect cooling-system water piping to engine-generator set and [remote radiator] [heat
exchanger] with flexible connectors.
D.
Connect engine exhaust pipe to engine with flexible connector.
E.
Connect fuel piping to engines with a gate valve and union and flexible connector.
1.
2.
3.
4.
5.
Diesel storage tanks, tank accessories, piping, valves, and specialties for fuel systems are
specified in Section 231113 "Facility Fuel-Oil Piping."
Natural-gas piping, valves, and specialties for gas distribution are specified in
Section 231123 "Facility Natural-Gas Piping."
LP-gas piping, valves, and specialties for gas piping are specified in Section 231126
"Facility Liquefied-Petroleum Gas Piping."
Install manual shutoff valve in a remote location to isolate [natural-gas] [LP-gas] supply
to the generator [enclosure] [room].
Vent gas pressure regulators outside building a minimum of 60 inches (1500 mm) from
building openings.
F.
Ground equipment according to Section 260526 "Grounding and Bonding for Electrical
Systems."
G.
Connect wiring according to Section 260519 "Low-Voltage Electrical Power Conductors and
Cables." Provide a minimum of one 90 degree bend in flexible conduit routed to the generator
set from a stationary element.
H.
Balance single-phase loads to obtain a maximum of 10 percent unbalance between any two
phases.
3.5
IDENTIFICATION
A.
Identify system components according to Section 230553 "Identification for HVAC Piping and
Equipment" and Section 260553 "Identification for Electrical Systems."
B.
Install a sign indicating the generator neutral is bonded to the main service neutral at the main
service location.
3.6
FIELD QUALITY CONTROL
A.
Testing Agency: At the owner’s request, the contractor shall engage a qualified, third-party,
testing agency to witness tests and inspections.
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B.
Manufacturer's Field Service: Engage a factory-authorized service representative to inspect, test,
and adjust components, assemblies, and equipment installations, including connections.
C.
Perform tests and inspections.
1.
D.
Manufacturer's Field Service: Engage a factory-authorized service representative to
inspect components, assemblies, and equipment installations, including connections.
Tests and Inspections:
1.
Perform tests recommended by manufacturer and each visual and mechanical inspection
and electrical and mechanical test listed in the first two subparagraphs as specified in
NETA Acceptance Testing Specification. Certify compliance with test parameters.
a.
Visual and Mechanical Inspection
1)
2)
3)
4)
b.
Electrical and Mechanical Tests
1)
2)
3)
4)
5)
2.
3.
b.
c.
d.
5.
Test protective relay devices per manufacturer recommendations.
Verify phase rotation, phasing, and synchronized operation as required by
the application.
Functionally test engine shutdown for low oil pressure, overtemperature,
overspeed, and other protection features as applicable.
Conduct performance test in accordance with NFPA 110.
Verify correct functioning of the governor and regulator.
NFPA 110 Acceptance Tests: Perform tests required by NFPA 110 that are additional to
those specified here including, but not limited to, single-step full-load pickup test.
Battery Tests: Equalize charging of battery cells according to manufacturer's written
instructions. Record individual cell voltages.
a.
4.
Compare equipment nameplate data with drawings and specifications.
Inspect physical and mechanical condition.
Inspect anchorage, alignment, and grounding.
Verify the unit is clean.
Measure charging voltage and voltages between available battery terminals for
full-charging and float-charging conditions. Check electrolyte level and specific
gravity under both conditions.
Test for contact integrity of all connectors. Perform an integrity load test and a
capacity load test for the battery.
Verify acceptance of charge for each element of the battery after discharge.
Verify that measurements are within manufacturer's specifications.
Battery-Charger Tests: Verify specified rates of charge for both equalizing and floatcharging conditions.
System Integrity Tests: Methodically verify proper installation, connection, and integrity
of each element of engine-generator system before and during system operation. Check
for air, exhaust, and fluid leaks.
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6.
Voltage and Frequency Transient Stability Tests: Use data capture from manufacturer
control panel and software to measure voltage and frequency transients for 50 and 100
percent step-load increases and decreases, and verify that performance is as specified.
E.
Coordinate tests with tests for transfer switches and run them concurrently.
F.
Operational Test: After electrical circuitry has been energized, start units to confirm proper
motor rotation and unit operation for generator and associated equipment.
G.
Test and adjust controls and safeties. Replace damaged and malfunctioning controls and
equipment.
H.
Remove and replace malfunctioning units and [retest] [reinspect] as specified above.
I.
Retest: Correct deficiencies identified by tests and observations and retest until specified
requirements are met.
J.
Report results of tests and inspections in writing. Record adjustable relay settings and measured
insulation resistances, time delays, and other values and observations. Attach a label or tag to
each tested component indicating satisfactory completion of tests.
3.7
MAINTENANCE SERVICE
A.
3.8
Initial Maintenance Service: Beginning at Substantial Completion, provide 60 months' full
maintenance by EGSA Certified employees of manufacturer's designated service organization.
Include quarterly exercising to check for proper starting, load transfer, and running under load.
Include routine preventive maintenance as recommended by manufacturer and adjusting as
required for proper operation. Provide parts and supplies same as those used in the manufacture
and installation of original equipment.
TRAINING
A.
The equipment supplier shall provide training for the facility operating personnel covering
operation and maintenance of the equipment provided. The training program shall be not less
than [4] hours in duration and the class size shall be limited to 5 persons. Training date shall be
coordinated with the facility owner.
END OF SECTION 263213
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