ICP F9MES Series Service And Technical Support Manual Download Page 17

SERVICE AND TECHNICAL SUPPORT MANUAL

Gas Furnace: F9MES

Specifications  subject to change without notice.

440 04 4900 02

17

14. Reinstall 2 screws securing blower assembly to blower

deck.

15. Reconnect blower leads to furnace control. Refer to

furnace wiring diagram, and connect thermostat leads if

previously disconnected.

NOTE

:  Be sure to attach ground wire and reconnect blower

harness plugs to blower motor.

ELECTRICAL OPERATION HAZARD

Failure to follow this warning could result in personal

injury or death.
Blower door switch opens 220

V power to control. No

component operation can occur unless switch is closed.

Caution must be taken when manually closing this

switch for service purposes.

!

WARNING

16. Downflow or horizontal furnaces with vent pipe through

furnace only:
a. Install and connect short piece of vent pipe inside

furnace to existing vent.

b. Connect vent connector to vent elbow.

17. Turn on electrical supply. Manually close blower door

switch. Use a piece of tape to hold switch closed. Check

for proper rotation and speed changes between heating

and cooling by jumpering R to G and R to Y on furnace

control thermostat terminals. If outdoor temperature is

below 70

_

F (21

_

C), turn off circuit breaker to outdoor unit

before running furnace in the cooling cycle. Turn outdoor

circuit breaker on after completing cooling cycle. (See

Figure 4

)

NOTE

:  If R

W thermostat terminals are jumpered at the time

blower door switch is closed, blower will run for 108 sec before
beginning a heating cycle.

a. Perform component self

test as shown at the bottom

of the SERVICE label, located on the blower door.

b. Verify blower is rotating in the correct direction

18. If furnace is operating properly, RELEASE BLOWER

DOOR SWITCH. Remove any jumpers or reconnect any

disconnected thermostat leads. Replace blower door.

19. Turn on gas supply and cycle furnace through one

complete heating cycle. Verify the furnace temperature

rise as shown in Adjustments Section. Adjust

temperature rise as shown in Adjustments Section.

Cleaning Burners and Flame Sensor

The following items must be performed by a qualified service

technician. If the burners develop an accumulation of light dirt

or dust, they may be cleaned by using the following procedure:

NOTE

:  Use a back-up wrench on the gas valve to prevent the

valve from rotating on the manifold or damaging the mounting

to the burner assembly.

ELECTRICAL SHOCK AND FIRE HAZARD

Failure to follow this warning could result in personal

injury, death, and/or property damage.
Turn off the gas and electrical supplies to the furnace

and install lockout tag before performing any

maintenance or service. Follow the operating

instructions on the label attached to the furnace.

!

WARNING

Refer to 

Figure 9

.

1. Disconnect power at external disconnect, fuse or circuit

breaker.

2. Turn off gas at external shut-off or gas meter.
3. Remove control door and set aside.
4. Turn electric switch on gas valve to OFF.
5. Disconnect the gas pipe from gas valve and remove pipe

from the furnace casing.

6. Remove individual wires from terminals on gas valve.
7. Disconnect Hot Surface Igniter (HSI) wires from HSI.
8. Disconnect Flame Sensor wire from Flame Sensor.
9. Support the manifold and remove the 4 screws that

secure the manifold assembly to the burner assembly

and set aside. Note the location of the green/yellow wire

and ground terminal.

10. Inspect the orifices in the manifold assembly for

blockages or obstructions. Remove orifice and clean or

replace orifice.

11. Remove the four screws that attach the top plate of the

casing to the furnace.

12. Raise top plate up slightly and prop it up with a small

piece of wood or folded cardboard.

13. Support the burner assembly and remove the screws

that attach the burner assembly to the heat exchanger

cell panel.

14. Remove wires from both rollout switches.
15. Slide one

piece burner out of slots on sides of burner

assembly.

16. Remove the flame sensor from the burner assembly.
17. (Optional) Remove the Hot Surface Igniter (HSI) and

bracket from the burner assembly.

18. Check igniter resistance. Nominal resistance is 40 to 70

ohms at room temperature and is stable over the life of

the igniter.

19. Clean burner with a brush and a vacuum.
20. Clean the flame sensor with fine steel wool (0000 grade).

Do not use sand paper or emery cloth.

Figure 9

Burner Assembly

B

URNER

 A

SSY

F

LAME

 S

ENSOR

(

B

ELOW

 B

URNER)

F

LAME

 R

OLL

OUT

 S

WITCH

B

URNER

 S

UPT.

 A

SSY

L11F064

Representative drawing only, some models may vary in appearance.

To reinstall burner assembly:

1. Install the Hot Surface Igniter (HSI) and bracket in burner

assembly.

2. Install flame sensor on burner.
3. Align the edges of the one-piece burner with the slots in

the burner assembly and slide the burners forward until

they are fully seated in the burner assembly.

4. Align the orifices in the manifold assembly with the

support rings on the end of the burner.

Summary of Contents for F9MES Series

Page 1: ...this manual in the following manner CAUTION Signal Words on Product Labeling Signal words are used in combination with colors and or pictures or product labels The signal word WARNING is used through...

Page 2: ...d result in personal injury or death CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage NOTE is used to highlight suggestions which w...

Page 3: ...d ON Type of Gas Natural Propane Filter Type and Size Check in box the Blower OFF Delay Jumper Heating Position for Fan Time OFF Setting 1 and 2 2 and 3 Position Time Off Position Time Off 90 108 120...

Page 4: ...ates HUM 220vac terminal is only energized when the draft inducer is energized in heating HUM 24vac terminal is only energized on a call for heat W and the LPS is closed Prime Condensate Trap with Wat...

Page 5: ...ific gravity of the gas To do this 1 Obtain average yearly gas heat value at installed altitude from local gas supplier 2 Obtain average yearly gas specific gravity from local gas supplier 3 Find inst...

Page 6: ...r natural gas If required manifold pressure is outside this range change main burner orifices h When correct input is obtained replace cap that conceal gas valve regulator adjustment screw Main burner...

Page 7: ...24 VAC CONNECTIONS P2 HOT SURFACE IGNITOR HSI INDUCER MOTOR IND CONNECTOR 220 VAC L1 LINE VOLTAGE CONNECTION SPARE1 COM BLUE 220 VAC L2 NEUTRAL CONNECTIONS 24 V THERMOSTAT TERMINALS HUMIDIFIER TERMINA...

Page 8: ...300 21 171 343 857 62 58 116 290 22 164 327 818 64 56 112 281 23 157 313 783 66 54 109 273 24 150 300 750 68 53 106 265 25 144 288 720 70 51 103 257 26 138 277 692 72 50 100 250 27 133 267 667 74 48 9...

Page 9: ...CE AND TECHNICAL SUPPORT MANUAL Gas Furnace F9MES Specifications subject to change without notice 440 04 4900 02 9 Table 3 Orifice Size and Manifold Pressure in w c for Gas Input Rate Single Stage L12...

Page 10: ...ometers in return and supply ducts as close to furnace as possible Be sure thermometers do not see heat exchangers so that radiant heat does not affect thermometer readings This is particularly import...

Page 11: ...sub base terminals or R and W wires at wall 3 Record amp draw across terminals when furnace is in low heat and after blower starts 4 Set heat anticipator on thermostat per thermostat instructions and...

Page 12: ...1955 1905 1850 1795 1740 1685 1630 1575 Yellow 4 0 1755 1710 1660 1610 1565 1515 1465 1415 1365 1310 Orange 5 3 5 1590 1540 1495 1450 1400 1355 1310 1260 1205 1145 Red 5 3 5 1450 1400 1355 1310 1265...

Page 13: ...t location accordingly Figure 6 Multipoise Orientations A93041 Electrical Controls and Wiring Pressure Switches Each pressure switch is labeled with the reference location noted as COLLECTOR BOX LPS o...

Page 14: ...interpret the LED 6 A component test sequence will follow 7 Reinstall the Main Control door Component Self Test NOTE The furnace control component test allows all components to run for a short time ex...

Page 15: ...connections for tightness and controls for proper operation each heating season Service as necessary 4 Inspect burner compartment before each heating season for rust corrosion soot or excessive dust I...

Page 16: ...t on blower wheel remove wheel from the blower housing and wash it with an appropriate degreaser To remove wheel a Mark blower wheel location on shaft before disassembly to ensure proper reassembly b...

Page 17: ...ld or damaging the mounting to the burner assembly ELECTRICAL SHOCK AND FIRE HAZARD Failure to follow this warning could result in personal injury death and or property damage Turn off the gas and ele...

Page 18: ...ontrol door when complete Servicing Hot Surface Igniter The igniter does NOT require annual inspection Check igniter resistance before removal Refer to Figure 9 Figure 10 and Figure 11 1 Turn off gas...

Page 19: ...to the condensate trap 7 Connect the leads of the condensate heat pad if used 8 Connect external drain piping to the condensate drain elbow or drain extension pipe 9 Turn gas on at electric switch on...

Page 20: ...C or lower freeze protection measures must be taken to prevent property or product damage CAUTION Since the furnace uses a condensing heat exchanger some water will accumulate in the unit as a result...

Page 21: ...SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace F9MES Specifications subject to change without notice 440 04 4900 02 21 Figure 14 Service Label 339462 2 Rev A...

Page 22: ...SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace F9MES Specifications subject to change without notice 22 440 04 4900 02 339542 2 Rev A...

Page 23: ...SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace F9MES Specifications subject to change without notice 440 04 4900 02 23 Figure 15 Wiring Diagram 339462 2 Rev A...

Page 24: ...SERVICE AND TECHNICAL SUPPORT MANUAL Gas Furnace F9MES Specifications subject to change without notice 24 440 04 4900 02 339542 2 Rev A...

Page 25: ...equence Gas valve and humidifier will not be turned on Inducer motor will start and remain on until the end of the blower test then off The following components are on for 10 15 seconds each individua...

Page 26: ...onent test Does the igniter glow orange white by the end of the 18 second warm up period Unplug igniter harness from control and repeat component test Check for 220V between connector P2 HSI and NEUTR...

Page 27: ...the gas valve GV is energized Simultaneously the electronic air cleaner terminal EAC is energized and remains energized as long as the blower motor BLWM is energized f Heat Off Delay When the thermos...

Page 28: ...injury death or property damage Improper installation adjustment alteration service maintenance or use can cause carbon monoxide poisoning explosion fire electrical shock or other conditions which may...

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