Download troubleshooting guide

V3
TROUBLESHOOTING
GUIDE
FOR HEAT PUMP BOOSTERS
MODELS:
HPB11, HPB15, & HPB22
PREFACE
This guide contains instructions for troubleshooting the Steffes Corporation
room heating units: Models HPB 11, HPB 15, and HPB 22.
In compiling this guide, Steffes Corporation has used its best judgment based
upon information available but disclaims any responsibility or liability for any
errors or miscalculations, contained herein, or any revisions, hereof, or which
result, whole or in part, from the use of this guide, or any revision hereof.
If there are any questions, contact Steffes Corporation technical
support at 1-888-STEFFES (783-3337)
TABLE OF CONTENTS
FLOW CHARTS
Unit Will Not Charge (Unit Has No Core Charge) or Control Board Lights Are Off ............................... 1
Unit Undercharges ..................................................................................................................................... 3
Unit Overcharges On Warm Days ............................................................................................................. 4
Cool Discharge Air ...................................................................................................................................... 5
Blower Does Not Run ................................................................................................................................. 6
MISCELLANEOUS
Discharge Air Check-Out Procedure .......................................................................................................7-8
Exploded View Diagram of Heat Pump Booster ........................................................................................ 9
Heat Pump Booster Parts List ............................................................................................................ 10-11
Heat Pump Booster
Function: Core Charging
Problem: Unit will not charge (Unit has no core charge) or Control Board lights are off.
Before starting any of the procedures below, check voltage on load side of all HPB circuit breakers and
check low voltage fuses on charge control circuit board. Place unit in off-peak mode.
Check utility switch and HPB off-peak
light on charge control circuit board for
proper
operation.
Check utility
switch
and HPB off-peak
Lights Inoperable
Lights Inoperable
light on charge control
circuit
board
Lights
Operable
(51) for proper operation.
No
Lights
Check "Outdoor
Temperature Sensor"
lights on charge control
circuit board.
Check "ETS CHARGING"
On
indicator light on charge
control circuitLights
board.Operable
Off
One or more
No
Check "Outdoor Temperature
lights on
Lights
Off
Sensor" lights on charge
Jumper thermostat brown lead to
control
circuit
board
(51).
thermostat orange lead. (NOTE:
Check "ETS CHARGING"
indicator light on charge
control
circuit board (51).
Charge light on
Make sure thermostat shaft is in
One or more
full clockwise position.)
lights on
Replace charge
control thermostat.
Replace charge control
circuit
board (51).
Below 45º
refer to the Theory of Operation
in Appendix of the Owner's
Manual.
With charge control
circuit board switches in
"AUTO" and "WINTER" position:
Above 45º
Outdoor
Temperature
fuses
Check for 24Both
VAC
between each of
energized
the two bottom
low voltage fuses
and the "C" position (thermostat
Check line voltage supply
Replace
charge
control
connection),
on charge
control
to control transformer and
circuit
board.
circuit board's terminal block.
Voltageunit
notwiring.
present on one
Defective
or both
Both fuses
Ok
energized
or both
Above 45º
Outdoor
Temperature
Repair wiring.
Defective
Set the charge level selector switch on
Below 45º
1. Remove outdoor
sensor wire "G". Outdoor
the charge control circuit board
(51)
Replace
temperature light
#1 should be on.
Outdoor
to
the
"HIGH"
position
and
retest.
charge
control
Temperature
circuit board.
2. Remove outdoor sensor wire "B". Outdoor
temperature light indicator #2 should be on.
Okboard switches in
With charge control circuit
Defective
"AUTO" and "WINTER" position:
Replace outdoor air
temperature
sensor.
1. Remove outdoor sensor wire
"G". Outdoor
circuit board's terminal block.
Voltage not
Replace thermostat (53).
present on one
Set the charge level selector switch on
Outdoor
the charge control circuit board to the
Temperature
Check outdoor temperature
and
"HIGH" position and retest.
Held Shut
temperature light #1 should be on.
Check line voltage supply to
Replace charge control
control
Check transformer
in-line fuse in(55) and Open
circuit board (51).
unitsecondary
wiring.
transformer
wiring if equipped.
Defective
Ok
Good
Repair wiring.
Look for a short circuit
in low voltage wiring
and replace transformer
if necessary.
Opens
Check slam
gate in-line fuse in
Check
Freely
Open
assembly behind
the
Check
slam
gate
transformer
secondary
Opens
units inlet/outlet
interlock
switch.
wiring.
Freely
ducting ports.
2. Remove outdoor sensor wire "B". Outdoor
temperature light indicator #2 should be
on. melt links and
Replace
Replace outdoor air
temperature sensor (61).
Check for defective
Check unit wiring
for 24 VAC between
each
of
charge Check
sequencers
and/or
replace
the two bottom low voltage fuses
(58) or defective
charge
control
and the "C" position (thermostat
heating elements
(18). on charge
circuit
board (51).
connection),
control
Charge light on
Check outdoor temperature
Charge light off
and refer to the Theory of
Operation.
Ok
Voltage
No Voltage
Check for 24 VAC on orange
Present
On
wire going to the top of the
Check for defective
staging sequencer
Check(50).
unit wiring
charge sequencers or
and/or replace
defective
heating
Voltage
charge
Nocontrol
Voltage
elements.
circuit board.
Present
Charge light off
Jumper thermostat (53) brown
lead to thermostat orange lead.
Replace
control
(NOTE:
Makecharge
sure thermostat
circuit board.
shaft is in full clockwise position.)
Check for 24 VAC between "C"
terminal on SFIII board and on
orange wire going to the top of
the staging sequencer.
Good
Closed
Open
Look for shorts in low
Check
secondary
voltage
wiring
and replace.
Adjust or replace. voltage
(approximately 24 VAC)
Flow chart
at the transformer.
complete discharge air
check-out procedure.
Replace charge control
circuit board (51).
continued on
next page.
No
Voltage
Replace
Transformer.
Page 1
Page 1
Proper voltage
present
Replace Charge
Control Circuit
Board.
Heat Pump Booster
Function: Core Charging
Problem: Unit undercharges
Before starting any of the procedures below, check voltage on load side of all HPB circuit
breakers. Check for 24 VAC between each of the 3-amp low voltage fuses and the "C" position
(thermostat connection) on the charge control circuit board's terminal block.
Unit undercharges
on cold days
thermostat
Check charge control thermostat
knob for proper position.
Lessthan
than
Less
Maxusage
usage
Max
Check daily kWh usage. (See
daily kWh
usage.
UnitCheck
Specifications
in Appendix
(See
Unit
Specifications.)
of the Owner's Manual.)
Proper
Proper
Maximum
Maximum
Usage
Usage
Ok
Unit undercharges
on warm days
selector switch
switch on
on the
the charge
charge
Set the charge level selector
controlboard
board(51)
to the
position.
Check
for
control
to "HIGH"
the "HIGH"
position.
Check
properamperage
amperagedraw
drawon
onheating
heatingelements
elements:(18):
for proper
slightly)
(Thiswill very slightly)
systems)
HPB11B = 46 AMPS (240V systems)
systems)
HPB15B = 61 AMPS (240V systems)
systems)
HPB22B = 92 AMPS (240V systems)
Ok
LessLess
thanthan
proper
amperage
proper
amperage
Check unit sizing.
No Voltage
Place the charge control
control circuit
circuit
board switches in
in "WINTER"
"WINTER"
and "AUTO". Disconnect
Disconnect
outdoor air sensor "W"
"W" wire.
wire.
AllThree
Three
All
Outdoor
Outdoor
Temperature
Temperature
Lights On
On
Lights
With the charge
charge level
level selector
selector
switch still
still in
in the
the "HIGH"
"HIGH"
position, check
check for
for zero
zero voltage
voltage
(49)
on charge control resistor from
fromthe
both
the center
to bottom
both
center
to bottom
and the
and center
the center
to top.
to top.
Not
Not All
All
Outdoor
Outdoor
Temperature
Temperature
Lights
Lights On
On
Check outdoor air
temperature sensor
sensor in
in
cold
coldplace
place(less
(lessthan
than15
degrees
mercury
15 F).F).AllAll
mercury
bulbs should open.
Ok
Defective
Check
VAC on base
Check for
for 24
24VAC
terminals of all
all charging
charging
sequencers
(58).
sequencers.
Voltage
Voltage
Replace charge control
circuit board (51).
Replace charge
control circuit
board (51).
Replace charge control
circuit board.
Replace charge control
circuit board (51).
All bulbs closed
Open
Voltage
Check for
contact closure
on all charging
charging
sequencers
(58).
sequencers.
No
Voltage
Check unit
wiring and/or
replace charge
control circuit
board
(51).
board.
Ok
All bulbs
open
Replace charge control
thermostat
(53).
thermostat.
the outdoor
temperature
Check
the outdoor
temperature
DefectiveCheck
Ok
lights
on charge
control
circuit
lights
on charge
control
circuit
board (51).
board.All
Allthree
threemust
mustbebeon.
on.
Replace
Replace
sequencer (58).
sequencer(s).
Replace outdoor air
temperature
sensor
(61).
temperature
sensor.
Page 3
Page 2
Check heating
elements
and(18).
replace
elements
as necessary.
Heat Pump Booster
Function: Core Charging
Problem: Unit overcharges on warm days
Before starting any of the procedure below, check voltage on load side of all HPB circuit
breaker and check low voltage fuses on charge control circuit board.
Lights work Check operation of the three
operation
of the three
"Outdoor
Temperature
properly Check
All lights "ON" regardless of
"Outdoor
Temperature
Lights work properly
"ON"temperature
regardless of
Sensor" lights
on charge All lights
outdoor
Sensor"
lights
on charge
outdoor temperature
control
circuit
board.
control circuit board (51).
With wires disconnected, check
With wires disconnected, check
ohm values of the charge control Defective
Not
ohm values of the charge control Defective
Check the charge level selector Not
resistor. Must be 175 ohm center
Ok
Check
the
charge
level
selector
resistor (49). Must be 175 ohm
switch. Unit should not be in
Ok
Ok
to top and center to bottom.
switch.
Unit
should
not
be
in
center to top and center to bottom.
"HIGH" mode on warm days.
"HIGH" mode on warm days.
Replace resistor.
Ok
Ok
Ok
Replace resistor (49).
Fuse bad
Check top
Set to auto
Check
unitonwiring
and(66) from
Defective
Check
VAC
resistor
middle to top
Setposition.
to auto
(1Check
AMP)topfuse.
charge
control
circuit
and middle to bottom. Reults vary depending on
(1
AMP)
fuse.
position.
Check
outdoor
board
fuses.
number
of charging lights on:
Fuse bad
Fuse Ok
sensorCheck
wiringoutdoor
and
Fuse Ok
sensor
wiring
for
1 light on = 24 VAC middle to top and bottom
replace the fuse.
short to ground and
2 lights on = Ok
0 VAC middle to top;Repair
24 VAC
Check for 32 VDC between the "C" position
replace the fuse. If
middle to bottom
Check forconnection)
32 VDC between
the "C" control
positioncircuit
(thermostat
on the charge
fuse
continues
to
3 Replace
lights oncharge
= 0 VAC
middle to top and bottom
control
(thermostat
connection)
on the
charge
control
circuit
board's
terminal
block
and
the
top
low
voltage
fuse on
open, replace charge
circuit board (51).
board's terminal
block
and
the
top
low
voltage
fuse
on
the
charge
control
circuit
board.
Incorrect
Ok
control circuit
the charge control circuit board (51). Check fuse.
board.
Replace charge
No voltage present
Check unit wiring and
Ok
No voltage present
control thermostat.
charge control circuit
board fuses.
Voltage present
Check control
Voltage present
Replace charge control
transformer(s)
and the
Ok
Defective
Check control
circuit board (51).
Ok
two
lower
3AMP
fuses.
transformer(s) (55) and
the
two lower 3AMP fuses.
Repair
Ok
1. With outdoor air temperature sensor
Defective
Defective
wiring disconnected and the selector switches
on the charge control circuit board set to
Replace charge
"WINTER" and "AUTO" positions, jumper
Replace fuse
control circuit
1. With outdoor air temperatureoutdoor
sensor wiring
disconnected
and
the
selector
air sensor terminals "W" and "R". The
Replace
fuse
and/or
board (51).
switches on the charge control circuit
set to
"WINTER"Sensor
and "AUTO"
bottomboard
Outdoor
Temperature
light on
and/or
transformer.
positions, jumper outdoor air sensor
terminals
andboard
"R". The
bottom
charge
control"W"
circuit
should
be off.
transformer
Outdoor Temperature Sensor light on charge control circuit board should be
(55).
off.
2. Jumper "W", "R", and "B" terminals. The
middle and bottom Outdoor Temperature
2. Jumper "W", "R", and "B" terminals.
The middle
and control
bottom circuit
Outdoor
Sensor lights
on charge
board
Temperature Sensor lights on charge
shouldcontrol
go off.circuit board should go off.
Defective
Replace charge control
circuit board (51).
Defective
Ok
Ok
Replace charge
Replace
Replace outdoor
air outdoor
control circuit
air temperature
temperature sensor(61).
board.
sensor.
Page 4
Page 3
Heat Pump Booster
Function: Air Delivery
Problem: Cool discharge air
Before starting any of the procedure below, check voltage on load side of all HPB circuit
breakers. Check for 24 VAC between each of the low voltage fuses the "C" position on the
charge control circuit board's terminal block..
Blower delivers cool
Cold All Stages
discharge air.
Blower deliversUncertain
cool
Cold Stage One
Cold All Stages
discharge air.
Now Warm
Still Cold
Does the charging system No/Uncertain
Iniate emergency
work correctly? Refer to
heat call.
Does the charging
system
work
the Theory
of Operation.
correctly? Refer to the Theory of
Initiate a Stage I heat call.
Not Ok
Operation in the Appendix of the
MakeInitiate
sure the
duct sensor
is positioned
Repair
a Stage
I heat call.
No
Owner's Manual.
properly
andduct
check
field (52)
wiring.
Not Ok
Make
sure the
sensor
is
Repair
Refer to the appropriate core
positioned properly and check field wiring.
charging sections:
Yes
Yes
Unit Undercharges
Ok
Refer to the on
appropriate
Unit Overcharges
Warm Days
coreNot
charging
sections
of no
Ok
Unit Will
Charge
(Unit has
Disconnect
the
yellow
wire
this
troubleshooting
guide.
Disconnect
the
red
wire
from
charge)
or
Control
Board
Lights
Damper doesn't
Damper
from
the damper
the
damper
motor. motor
Initiate(22).
a
are Off
open
With duct sensor (52) disconnected
doesn't
Initiate
a
heat
call,
check
heat call, check voltage
at With
interface
(21),
jumper theat
open
voltagethe
between
ductboard
sensor
disconnected
between
yellow the
wireyellow
and
0 VAC
red and board,
black terminal
block
wire
and
the
red
interface
jumper the
red and
0 VAC
the red wire. wire.
positions.
Watchblock
for damper
to open.
black terminal
positions.
Watch
for damper to open.
24 VAC24 VAC
Damper opens
Are the sensors on the duct
Damper opens
Check
voltage
between
sensor (52) and the air
Check
voltage
between
24 VAC
24 VAC
the yellow
wire and
Replace duct
COLD ALL
STAGES:
Are both of the
discharge
controller
(45) open.
the yellow
wire and
blue wire.
sensors on the air discharge controller open?
the bluethe
wire.
Replacesensor
duct (52).
No
sensor.
0
VAC
0 VAC
COLD STAGE
Yes ONE ONLY: Are both of the
sensors
on the duct sensor open?
Replacethe
the interface
Replace
(21).
Replace
Replace
interfaceboard
board.
Replace
thethe damper
Check unit
motor
appropriate
damper motor. (22).
No
wiring. Yes
sensors.
Correct
Cold Stage One Only
Incorrect
Correct
Check unit
Fix wiring.
unit
wiring.
Incorrect
Replace the interface
board.
Page 5
Page 4
Fix unit
wiring.
Replace the
interface
Replace
air
boarddischarge
(21).
controller or
duct sensor.
Heat Pump Booster
Function: Air Delivery
Problem: Blower does not run
Before starting any of the procedure below, check voltage on load side of all HPB circuit
breakers. Check for 24 VAC between each of the low voltage fuses and the "C" position on the
charge controls circuit board's terminal block. Put heater into peak mode.
Initiate a peak mode.
Initiate a peak mode.
Check for 24 VAC across "R" and "C"
terminals on booster interface board (21).
Check for 24 VAC across "R" and "C"
terminals on booster interface board.
Voltage present
Voltage present
Jumper terminal "R" to "W" on
the interface board (21).
Jumper terminal "R" to "W" on
Motor
does notboard.
run
the interface
No voltage
Replace interface
board (21).
Replace interface
board.
Troubleshoot and repair
field wiring.
Troubleshoot and repair
field wiring.
Motor runs
Check for operation
Relay closes
of fan relay (54).
Check for operation
Relay closes
of fan relay.
Relay will not operate
No voltage
No voltage
Motor runs
Motor does not run
Relay will not operate
Voltage
Check voltage at present
relay coil.
Voltage
Check voltage at present
relay coil.
No voltage
Check field wiring
and wall thermostat.
Check field wiring
and wall thermostat.
Proper
Voltage
Check supply voltage to
core blower motor (38).
Proper
Voltage
Check supply voltage to
core blower
motor.
Improper
Voltage
Improper
Check unit wiring Voltage
and
fan limits (44 & 27).
Closed
Check unit wiring and
fan limits.
Replace fan
relay (54).
Replace fan
relay.
Replace core
blower motor (38).
Replace core
blower motor.
Check system
wiring.
Open
Replace fan limit
switch(es).
Page 6
Page 5
DISCHARGE AIR
Check-Out Procedure
Models: HPB11B, HPB15B and HPB22B
CHECK OUT PROCEDURE:
The failure of the melt link is often the result of another problem that exists within the booster. Typically, the failure is a
direct result of the inability of the booster to regulate its output temperature. If the primary problem is not rectified, melt
link failure could occur again. Thus, after the failed melt link has been replaced, the booster MUST be tested to ensure
that failure will not reoccur.
1. Check for proper connection of the remote mounted duct sensor, “IF USED”.
CAUTION: Shorting of the duct sensor to the ductwork WILL cause a malfunction in the booster and result
in the melt link failing. An inspection of the duct sensor mounting and clearance must be
performed.
2. Remove the electrical panel cover on the front of the booster.
3. Disconnect blowers to test damper operation by removing the purple wire from the blower relay. Energize the
booster’s control circuit to observe the damper motor.
4. With no heat call to the booster, the damper motor should go to a fully closed
(CW) position. (See Figure 1)
Figure 1
5. Now, initiate a Stage 2 heat call from the booster’s room thermostat. The
damper motor should go to a fully open (CCW) position. (See Figure 2)
6. If the damper does not move to an opened and closed position as shown in
Figures 1 and 2, check the damper system for mechanical binding and/or for
CCW
damper motor malfunction.
7. De-energize the control circuit and remove the “RED” damper motor wire from
the CCW terminal.
8. Energize the control circuit again and initiate another heat call from the booster’s
CLOSED
room thermostat.
9. Check voltage from the COM terminal and the now disconnected “RED” wire
Figure 2
on the damper motor. 24 VAC should be present. Also, check the voltage
between the COM and CW terminal. No voltage should be present.
10. Remove the air discharge sensor. Inspect the temperature sensing bulbs for
separations or breaks in the mercury columns at the center of the bulbs. It may
CCW
be necessary to warm the bulbs to fully view the mercury columns. In many
cases, if a separation exists, it can be removed by the heating of the sensor
causing the mercury to move to the top of the bulb.
CW
CW
OPEN
CAUTION: Overheating the bulb can cause it to burst. SAFETY GLASSES MUST BE WORN WHEN
HEATING THE BULBS.
NOTE: Early booster models incorporated an air discharge sensor that signaled the booster’s control system
directly. Newer models use triac controls. If the booster that is being serviced does not have the triac
switches on the air discharge sensor, it is recommended that the sensor be replaced.
11. De-energize the control circuit. Jumper between the upper and lower copper bulb mounting brackets of the 145
degree mercury bulb (inner bulb) on the air discharge sensor which is located in the base of the booster.
12. Energize the control circuit and check the status of the #4 LED Red light on the booster’s interface board. This
light must be energized (indicates the damper is satisfied).
13. Retest the voltage at the damper motor. (Refer to steps 7, 8 and 9.) If the booster does not respond correctly to the
voltage check, replace the air discharge sensor. Voltage should be zero between the COM terminal and “RED”
damper motor wire. It should also be zero between the COM terminal and the CW terminal.
14. De-energize the control circuit again. With the 145 degree sensing bulb jumper still in place on the air discharge
sensor, jumper between the upper and lower copper bulb mounting brackets of the 160 degree sensing bulb (outer
bulb).
Page 6
Discharge Air Check Out Procedure Continued…
15. Energize the control circuit and check the #4 yellow LED light on the interface board. It should remain on
(indicates the damper is satisfied), and there should be 24 VAC between the CW terminal and the COM terminal on
the damper motor.
16. If any of the voltage tests performed in this check-out procedure do not yield the correct results, check connections
from the booster’s interface board to the air discharge sensor.
17. If all systems check-out, de-energize all circuits and reconnect all wires, remove all jumpers, and reassemble the
booster by reversing the disassembly procedure.
18. Restore power to the booster.
Consult the factory with questions or if assistance is required with replacing the melt link
or checking any the systems described in this procedure.
THIS PROCEDURE MUST BE PERFORMED BY A QUALIFIED ELECTRICIAN
Page 7
EXPLODED VIEW DIAGRAM
Page 8
HPB PARTS LIST
NOTE: When ordering replacement parts, please include unit model number and serial number.
DWG.
REF.
NO.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
DESCRIPTION
Stainless Steel Panel, Back
Stainless Steel Panel, Front
Aluminized Steel Panel, Top
Aluminized Steel Panel, Right
Aluminized Steel Panel, Left
2" Blanket Insulation, Back & Sides (Outer)
2" Blanket Insulation, Back & Sides (Inner)
2" Blanket Insulation, Top & Front (Inner)
2" Blanket Insulation, Top & Front (Middle)
1" Blanket Insulation, Top & Front (Outer)
Galvanized Steel Panel, Back
Galvanized Steel Panel, Right
Galvanized Steel Panel, Left
Galvanized Steel Panel, Top
Galvanized Steel Panel, Front
Element Wiring Harness
Core Temperature Sensor
Main Wiring Harness
Element Jumpers
Heating Element (277 V, 1830W)
Heating Element (208V, 1830W)
Heating Element (240V, 1830W)
Heat Storage Brick
Control Board Mounting Plate
Relay Interface Board (SFIII)
Damper Motor
Leveling Legs
Fan Wiring Harness
Base Assembly
Core Charging High Limit Switch Assembly
130o F Low Core Temperature Switch
Limit Bar Channeling Plate
Limit Bar Louvre Panel
Painted Panel, Back
Painted Panel, Right
Painted Panel, Left
Painted Panel, Front
Painted Panel, Top
Electrical Panel Cover
Air Delivery Damper Assembly
Core Damper Linkage Assembly
Core Blower Motor (1/3 HP, 1625 RPM)
Page 9
HPB11
ITEM
NO.
1140098
1140128
1140085
1140142
1140089
1050050
1050051
1050052
1050053
1050054
1140087
1140087
1140087
1140084
1140086
1040017
1040020
1040016
1040014
1014022R
1014013R
1014014R
1903004
1140140
1023007R
1021003R
1159004
1040013
1141132
1040011R
1040007R
HPB15
ITEM
NO.
1140099
1140129
1140085
1140141
1140088
1050055
1050056
1050057
1050058
1050059
1140097
1140097
1140097
1140084
1140093
1040019
1040020
1040018
1040015
1014022R
1014013R
1014014R
1903004
1140140
1023007R
1021003R
1159004
1040013
1141132
1040011R
1040007R
HPB22
ITEM
NO.
1140388
1140380
1140085
1140384
1140392
1050035
1050041
1050047
1040048
1050049
1140396
1190395
1140397
1140084
1140400
1040246
1040020
1040244
1040037
1014022R
1014013R
1014014R
1903004
1140140
1023007R
1021003R
1159004
1040013
1141132
1040011R
1040007R
1140070
1140077
1140100
1140147
1140081
1140090
1140074
1140095
1140111
1141129
1040084
1140070
1140136
1140101
1140148
1140137
1140102
1140074
1140080
1140111
1141129
1040084
1140070
1140136
1140364
1140356
1140376
1140372
1140074
1140080
1140111
1141129
1040084
DWG.
REF.
NO.
39.
40.
41.
42.
43.
44.
45.
46.
47.
48.
49.
50.
51.
52.
53.
54.
55.
56.
57.
58.
59.
60.
61.
62.
DESCRIPTION
Core Blower Wheel
Slam Gate Interlock Switch
Slam Gate Melt Link
Slam Gate Melt Link Linkage
Slam Gate Actuator Complete
Air Discharge High Limit
Air Discharge Controller
Inlet/Outlet Plenum Assembly
Motor Run Capacitor
Circuit Breaker Standoff
Charge Control Resistor
Hardboard Base Insulation
Charge Control Circuit Board (SFIII)
Low Temperature Duct Sensor
Charge Control Thermostat Assembly
Fan Relay
40VA Control Transformer
Electrical Panel
Stage 2 Time Delay Sequencer
Charging Sequencers
15 Amp Circuit Breaker – GE Brand*
15 Amp Circuit Breaker – Siemens Brand*
60 Amp Circuit Breaker (208/240V) – Siemens Brand*
60 Amp Circuit Breaker (208/240V) – GE Brand*
60 Amp Circuit Breaker (277V) – GE Brand*
Outdoor Air Temperature Sensor Assembly
285o Core Temperature Control
HPB11
ITEM
NO.
1020002R
1024004
1159005
1140236
1141131
1012012R
1040053R
1190004
1018017
1140139
1017027
1050060
1023005
1040054R
1040033R
1018008
1017034
1140072
1019000
1019002
1024012R
1024000R
1024002R
1024013R
1024014
1040032
N/A
HPB15
ITEM
NO.
1020002R
1024004
1159005
1140236
1141131
1012012R
1040053R
1190004
1018017
1140139
1017027
1050061
1023005
1040054R
1040033R
1018008
1017034
1140072
1019000
1019002
1024012R
1024000R
1024002R
1024013R
1024014
1040032
N/A
HPB22
ITEM
NO.
1020002R
1024004
1159005
1140236
1141131
1012012R
1040053R
1190004
1018017
1140139
1017027
1050061
1023005
1040054R
1040033R
1018008
1017034
1140072
1019000
1019002
1024012R
1024000R
1024002R
1024013R
1024014
1040032
1040039
* When replacing breakers in a Steffes heating system, it is important to replace with like brand heaters.
Page 10