Allied 92G1UHE Service Manual Download

Page: 12 / 58

508107-01

Issue 2041

Page 12 of 58

Figure 3. Integrated Control

(Automatic Hot Surface Ignition System)

BLOWER OFF DELAY

RED LED RECALL BUTTON

Electronic Ignition

On a call for heat the integrated control monitors the

combustion air inducer pressure switch. The control board

will not begin the heating cycle if the pressure switch is

closed (by-passed). Once the pressure switch is determined

to be open, the combustion air inducer is energized. When

the differential in the pressure switch is great enough, the

pressure switch closes and a 15-second pre-purge begins.

If the pressure switch is not proven within 2-1/2 minutes,

the integrated control goes into Watchguard-Pressure

Switch mode for a 5-minute re-set period.

After the 15-second pre-purge period, the ignitor warms

up for 20 seconds during which the gas valve opens at

19 seconds for a 4-second trial for ignition. The ignitor

remains energized for the first 3 seconds during the 4

second trial. If ignition is not proved during the 4-second

period, the integrated control will try four more times with

an inter purge and warm-up time between trials of 35

seconds. After a total of five trials for ignition (including the

initial trial), the integrated control goes into Watchguard-

Flame Failure mode. After a 60-minute reset period, the

integrated control will begin the ignition sequence again.

Fan Time Control

Heating Fan On Time

The fan on time of 30 seconds is not adjustable.

Heating Fan Off Time

Fan off time (time that the blower operates after the heat

demand has been satisfied) can be adjusted by moving

the jumper to a different setting. The unit is shipped with

a factory fan off setting of 90 seconds. For customized

comfort, monitor the supply air temperature once the heat

demand is satisfied. Note the supply air temperature at the

instant the blower is de-energized.

Adjust the fan-off delay to achieve a supply air temperature

between 90° - 110° at the instant the blower is de-energized.

(Longer delay times allow for lower air temperature, shorter

delay times allow for higher air temperature). See Figure 4.

Cooling Fan On Time

The fan on time is 2 seconds and is not adjustable.

Cooling Fan Off Time

The control has a 45 second fan off delay after cooling

demand has been met. This delay is factory set and not

adjustable.

Figure 4.

Heating Components

Combustion air inducer (B6), primary limit control (S10),

ignitor, burners, flame rollout switch (S47), gas valve

(GV1), combustion air pressure switch (S18), and heat

exchangers are located in the heating compartment. The

heating compartment can be accessed by removing the

outer access panel.

Ignitor (Figure 5)

A93UH1E / 92G1UHE units use a nitride ignitor made from

a proprietary ceramic material. To check ignitor, measure

its resistance and voltage. A value of 39 to 70 ohms

indicates a good ignitor. Voltage to the ignitor should be

102 - 132VAC. See Figure 9 for resistance and voltage

checks.

Summary of Contents for 92G1UHE

Page 1: ...quence of Operation 58 This is a safety alert symbol and should never be ignored When you see this symbol on labels or in manuals be alert to the potential for personal injury or death Electric shock hazard Can cause injury or death Before attempting to perform any service or maintenance turn the electrical power to unit OFF at disconnect switch es Unit may have multiple power supplies WARNING As ...

Page 2: ...5 6 8 40 133 A93UH1E090C12A 88000 84000 93 0 1 5 3 1 2 120 60 1 15 6 8 40 147 A93UH1E090C16A 88000 84000 93 0 2 5 4 1 2 120 60 1 15 8 4 40 151 A93UH1E110C16A 110000 104000 93 0 2 5 4 1 2 120 60 1 15 8 4 40 163 A93UH1E110C20A 110000 105000 93 0 3 5 1 2 120 60 1 15 10 9 40 169 Note For vent length and clearances to combustibles please reference installation instructions MODEL NUMBER GUIDE Numeric Co...

Page 3: ...00 Low 705 655 600 550 505 455 405 355 A93UH1E090C12A 1 2 10 x 8 50 80 High 1375 1340 1310 1275 1240 1210 1170 1135 Med High 1315 1285 1260 1225 1190 1160 1130 1105 Med 1125 1090 1055 1015 965 920 885 855 Med Low 885 840 780 730 675 620 580 535 Low 730 685 645 590 535 495 455 405 A93UH1E090C16A 3 4 10 x 10 45 75 High 1675 1655 1615 1595 1560 1525 1490 1445 Med High 1475 1460 1410 1365 1335 1295 12...

Page 4: ... C Width Downflow Combustible Flooring Base 11M60 17 5 B Width 11M61 21 0 C Width Night Service Kit 84W48 Single Stage Horizontal Suspension Kit 51W10 80 90 Kit Flush Mount Termination 90 Furnaces Only US Only 51W11 2 3 Vent Version Concentric Vent Kit 90 Furnaces Only US Only 71M80 1 1 2 Vent Version 69M29 2 Vent Version 60L46 3 Vent Version 2 Stage Compressor Kit 85W66 Blower Relay Kit Twinning ...

Page 5: ...3 1 2 120 60 1 15 6 8 40 128 5 92G1UH090BE12 88000 84000 92 1 1 5 3 1 2 120 60 1 15 6 8 40 145 0 92G1UH090CE16 88000 84000 92 1 2 5 4 1 2 120 60 1 15 8 4 40 145 0 92G1UH110CE16 110000 104000 92 1 2 5 4 1 2 120 60 1 15 8 4 40 157 0 92G1UH110CE20 110000 105000 92 1 3 5 1 2 120 60 1 15 10 9 40 159 0 Note For vent length and clearances to combustibles please reference installation instructions MODEL N...

Page 6: ...00 Low 705 655 600 550 505 455 405 355 92G1UH090BE12 1 2 10 x 8 50 80 High 1375 1340 1310 1275 1240 1210 1170 1135 Med High 1315 1285 1260 1225 1190 1160 1130 1105 Med 1125 1090 1055 1015 965 920 885 855 Med Low 885 840 780 730 675 620 580 535 Low 730 685 645 590 535 495 455 405 92G1UH090CE16 3 4 10 x 10 45 75 High 1675 1655 1615 1595 1560 1525 1490 1445 Med High 1475 1460 1410 1365 1335 1295 1260...

Page 7: ... C Width Downflow Combustible Flooring Base 11M60 17 5 B Width 11M61 21 0 C Width Night Service Kit 18F15 Single Stage Horizontal Suspension Kit 51W10 80 90 Kit Flush Mount Termination 90 Furnaces Only US Only 51W11 2 3 Vent Version Concentric Vent Kit 90 Furnaces Only US Only 71M80 1 1 2 Vent Version 69M29 2 Vent Version 60L46 3 Vent Version 2 Stage Compressor Kit 85W66 Blower Relay Kit Twinning ...

Page 8: ...alve Combustion Air Inducer Blower Access Door Combustion Air Pressure Prove Switch Cold End Header Box Control Box includes integrated ignition control transformer and interlock switch Blower Assembly Bag Assemblies Cabinet Top Cap Heat Exchanger Assembly Flexible No HJB Exhaust Collar ...

Page 9: ...on to the transformer T1 The breaker is rated at 3A at 32V If the current exceeds this limit the breaker will trip and all unit operation will shutdown The breaker can be manually reset by pressing the button on the face Integrated Ignition Control A92 Shock hazard Disconnect power before servicing Control is not field repairable If control is inoperable simply replace entire control Can cause inj...

Page 10: ...g heat demand 4 Low Flame Signal check flame sensor 5 Watchguard burner failed to light exceeded maximum number of retries or recycles 6 Not Used 7 Primary or Secondary Limit Open or Watchguard Mode Limit Switch Open longer than 3 minutes 8 Rollout Switch Open 9 Pressure Switch failed to close or opened during heat demand 10 Watchguard Pressure Switch opened 5 times during one heat demand 11 Press...

Page 11: ... Open 9 Pressure Switch failed to close or opened during heat demand 10 Watchguard Pressure Switch opened 5 times during one heat demand 11 Pressure Switch stuck closed prior to activation of combustion air inducer 12 Flame Sensed without gas valve energized 13 Low Line Voltage 1 A Heartbeat is indicated by a Slow Flash 1 sec on 1 sec off repeating 2 Error codes are indicated by a Rapid Flash the ...

Page 12: ...ain Fan Time Control Heating Fan On Time The fan on time of 30 seconds is not adjustable Heating Fan Off Time Fan off time time that the blower operates after the heat demand has been satisfied can be adjusted by moving the jumper to a different setting The unit is shipped with a factory fan off setting of 90 seconds For customized comfort monitor the supply air temperature once the heat demand is...

Page 13: ...y to clean without removing any part of the burners During operation flame is sensed by current passed through the flame and sensing electrode The ignition control allows the gas valve to remain open as long as flame signal is sensed NOTE The A93UH1E 92G1UHE is polarity sensitive Make sure that the furnace is wired correctly and is properly grounded A microamp DC meter is needed to check the flame...

Page 14: ...alve to assure safety shut off If the gas valve must be replaced the same type valve must be used 24VAC terminals and gas control switch are located on top of the valve All terminals on the gas valve are connected to wires from the ignition control 24V applied to the terminals opens the valve Inlet and outlet pressure taps are located on the valve A manifold adjustment screw is also located on the...

Page 15: ... 1 5 0 5 1 4 0 4 Set Dial to DC MicroAmps Multi Meter To Control Sensor Terminal To Flame Terminal Flame Sensor Terminal Flame Sensor Wire Intergrated Control Remove sensor from integrated control and connect alligator clip to flame sensor lead Remove sensor from integrated control and connect alligator clip to terminal on control ...

Page 16: ... the manifold and check resistance of ignitor at the plug Reading should be between 39 and 70 ohms If the reading is correct then the problem is with the wiring between the jack plug and the control If reading is not correct the issue is the ignitor Test 3 Check ignitor for correct voltage Insert meter probes into terminals 2 and 4 use small diameter probes in order not to damage plug Check voltag...

Page 17: ... monitors across the combustion air inducer orifice to insure proper flow through the heat exchanger The switch is a SPST N O pressure switch electrically connected to the integrated control The purpose of the switch is to prevent burner operation if the combustion air inducer is not moving enough air for proper combustion Figure 10 Pressure Switch On start up the switch monitors whether the combu...

Page 18: ...ine and with hose from the positive side of the manometer to the tee in the positive line NOTE tive However the port reads less negative pressure than the port 4 Operate unit and observe manometer reading Readings will change as heat exchanger warms a Take one reading immediately after start up b Take a second reading after unit has reached steady state approximately 5 minutes This will be the pre...

Page 19: ... through Table 12 Wrong pressure switch installed in the unit or pressure switch is out of calibration Check that the correct pressure switch is installed in the unit Replace pressure switch if necessary Miswiring of furnace or improper connections at pressure switch Check for correct wiring and loose connections Correct wiring and or replace any loose connections Pressure switch failure If all th...

Page 20: ...e is present in tests 1 and 2 and motor is not operating properly replace motor The motor is not field repairable If replacing the indoor blower motor or blower wheel is necessary placement is critical The blower wheel must be centered in the blower housing as shown in Figure 13 When replacing the indoor blower motor the set screw must be aligned and tightened with the motor shaft as shown in Figu...

Page 21: ...g P49 If 24 volts is not present problem may be up stream of plug P49 Proceed to test 4 Multi Meter set to VAC 12 0 12 0 24 Multi Meter set to VAC problem is with the harness If voltage is not present problem may be may be with the integrated control Check for 120 volts across terminals CIRC and Neutrals on the integrated control If voltage is present problem is with the harness If voltage is not ...

Page 22: ... 20 000 2 K two kilo ohms two thousand ohms 0 2 000 200 two hundred ohms 0 200 Motor Module Installation All replacement motor control modules look similar however each module is designed for a specific motor size It is very important to make sure that you are using the correct replacement motor control module USE OF THE WRONG MOTOR CONTROL MODULE MAY RESULT IN UNEXPECTED UNIT OPERATION 1 Verify e...

Page 23: ... or CPVC Low temperature solvent cement is recommended during cooler weather Metal or plastic strapping may be used for vent pipe hangers Uniformly apply a liberal coat of PVC primer for PVC or use a clean dry cloth for ABS to clean inside socket surface of fitting and male end of pipe to depth of fitting socket NOTE Canadian Applications Only Pipe fittings primer and solvent cement used to vent e...

Page 24: ...fore applying cement Capacity VENT PIPE DIA in STANDARD CONCENTRIC Outdoor Exhaust Accelerator Dia X Length Outdoor Exhaust Accelerator Dia X Length Flush Mount Kit 1 1 2 Concentric Kit 2 Concentric Kit 3 Concentric Kit 1 1 2 X 12 2 X 12 51W11 71M80 or 44W92 69M29 or 44W92 60L46 or 44W93 030 1 1 2 YES YES YES 2 YES YES YES 2 1 2 YES YES YES 3 YES YES YES 045 1 1 2 YES YES YES 2 YES YES YES 2 1 2 Y...

Page 25: ...nes insulation if required In areas where piping penetrates joists or interior walls hole must be large enough to allow clearance on all sides of pipe through center of hole using a hanger When furnace is installed in a residence where unit is shut down for an extended period of time such as a vacation home make provisions for draining condensate collection trap and lines Figure 20 CHIMNEY OR GAS ...

Page 26: ...pe lengths permitted Regardless of the diameter of pipe used the standard roof and wall terminations described in section Exhaust Piping Terminations should be used Exhaust vent termination pipe is sized to optimize the velocity of the exhaust gas as it exits the termination Refer to Table 14 In some applications which permit the use of several different sizes of vent pipe a combination vent pipe ...

Page 27: ...045 070 090 110 135 Standard or Concentric See Table 3 Intake or Exhaust 1 1 2 2 2 1 2 or 3 Furnace capacity 1 Which termination 2 Which needs most elbows 3 How many 4 Desired pipe size 5 What is the altitude 6 Use Table 11 through Table 13 to find max pipe length 7 Figure 22 Vent Pipe Diameter Sizing ...

Page 28: ...5 60 28 n a 97 97 78 78 9 36 21 70 55 23 92 92 73 73 10 31 16 65 50 18 87 87 68 68 Concentric Termination Elevation 0 10 000 ft Number of 90 Elbows Used 1 1 2 Pipe 2 Pipe 2 1 2 Pipe 3 Pipe Capacity Capacity Capacity Capacity 030 045 070 090 110 030 045 070 090 110 030 045 070 090 110 030 045 070 090 110 1 20 15 n a n a 68 53 37 17 100 85 59 34 116 116 109 109 2 15 10 63 48 32 12 95 80 54 29 111 11...

Page 29: ... 030 045 070 090 110 030 045 070 090 110 030 045 070 090 110 1 20 15 n a n a 66 51 29 9 95 80 48 23 112 112 93 93 2 15 10 61 46 24 4 90 75 43 18 107 107 88 88 3 10 n a 56 41 19 n a 85 70 38 13 102 102 83 83 4 n a 51 36 14 80 65 33 8 97 97 78 78 5 46 31 9 75 60 28 3 92 92 73 73 6 41 26 4 70 55 23 n a 87 87 68 68 7 36 21 n a 65 50 18 82 82 63 63 8 31 16 60 45 13 77 77 58 58 9 26 11 55 40 8 72 72 53 ...

Page 30: ...aust pipe EXHAUST DO NOT transition from smaller to larger pipe in horizontal runs of exhaust pipe EXHAUST Figure 23 TYPICAL EXHAUST PIPE CONNECTIONS IN HORIZONTAL DIRECT OR NON DIRECT VENT APPLICATIONS RIGHT HAND DISCHARGE SHOWN SIDE VIEW 45 MAX 45 MAX 2 2 2 2 or 2 12 max EXHAUST TRANSITION 3 2 2 EXHAUST TRANSITION 1 1 2 2 2 EXHAUST or NOTE 1 1 2 Vent Pipe Diameter Allowed Only on 030 045 070 Uni...

Page 31: ...forward or to either side in the upflow position and either straight out or downward in the horizontal position The air intake piping must not terminate too close to the flooring or a platform Ensure that the intake air inlet will not be obstructed by loose insulation or other items that may clog the debris screen 2 If intake air is drawn from a ventilated attic Figure 27 or ventilated crawlspace ...

Page 32: ...plications the vent termination is limited by local building codes In the absence of local codes refer to the current National Fuel Gas Code ANSI Z223 1 NFPA 54 in U S A and current CSA B149 Natural Gas and Propane Installation Codes in Canada for details Position termination according to location given in Figure 30 or Figure 39 In addition position termination so it is free from any obstructions ...

Page 33: ...A N A N A N A N A 2 in N A N A 5 3 12 10 22 19 30 27 2 1 2 in N A N A N A N A 7 N A 15 N A 22 N A 3 in N A N A N A N A N A N A 10 10 16 16 1 Refer to 99 Minimum Design Temperature table provided in the current edition of the ASHRAE Fundamentals Handbook 2 Poly Propylene vent pipe PP by Duravent and Centrotherm NOTE Concentric terminations are the equivalent of 5 and should be considered when measu...

Page 34: ...ches 152mm for appliances 10 000 pliances 10 000 Btuh 3kw and 50 000 pliances 50 000 Btuh 15kw 6 inches 152mm for appliances 10 000 Btuh 3kw 12 inches 305mm for appliances 10 000 Btuh 3kw and 100 000 Btuh 30kw 36 inches 9m for appliances 100 000 Btuh 30kw 3 feet 9m above if within 10 feet 3m horizontally 6 feet 1 8m 7 feet 2 1m 12 inches 305mm 1 In accordance with the current ANSI Z223 1 NFPA 54 N...

Page 35: ...ration is 3 76 mm on roof terminations and 6 152 mm on sidewall terminations 3 On roof terminations the intake piping should terminate straight down using two 90 elbows see Figure 31 4 Exhaust piping must terminate straight out or up as shown A reducer may be required on the exhaust piping at the point where it exits the structure to improve the velocity of exhaust away from the intake piping See ...

Page 36: ... 1 2 38mm accelerator provided on 71M80 44W92 kits for 045 and 070 models 12 305mm INTAKE AIR EXHAUST VENT Figure 37 Direct Vent Concentric Wall Termination 71M80 69M29 or 60L46 US 44W92 or 44W93 Canada 12 305mm Min above grade or average snow accumulation INTAKE AIR INTAKE AIR INTAKE AIR OUTSIDE WALL GRADE CLAMP Not Furnished FIELD PROVIDED REDUCER MAY BE REQUIRED TO ADAPT LARGER VENT PIPE SIZE T...

Page 37: ... Clearance under veranda porch deck or balcony 12 Equal to or greater than soffit depth 3 feet 9m 12 3 feet 9m within a height 15 feet 4 5m above the meter regulator assembly 3 feet 9m 6 inches 152mm for appliances 10 000 Btuh 3kw 12 inches 305mm for appliances 10 000 Btuh 3kw and 100 000 Btuh 30kw 36 inches 9m for appliances 100 000 Btuh 30kw 3 feet 9m above if within 10 feet 3m horizontally 6 fe...

Page 38: ...rect Vent Roof Termination Kit 15F75 or 44J41 UNCONDITIONED ATTIC SPACE 3 76MM OR 2 51MM PVC PROVIDE SUPPORT FOR EXHAUST LINES 12 305MM ABOVE AVE SNOW ACCUMULATION SIZE PER EXHAUST PIPE TERMINATION SIZE REDUCTION TABLE 3 If exhaust piping must be run up a side wall to position above snow accumulation or other obstructions piping must be supported every 24 inches 610mm When exhaust piping must be r...

Page 39: ...ance above grade or average snow accumulation B Horizontal separation between intake and exhaust C Minimum from end of exhaust to inlet of intake D Exhaust pipe length E Wall support distance from top of each pipe intake exhaust 12 305 mm Min 12 305 mm Min 6 152 mm Min 24 610 mm Max 9 227 mm Min 12 305 mm Min 16 405 mm Max 6 152 mm Max 6 152 mm Min 24 610 mm Max 9 227 mm Min 12 305 mm Min 20 508 m...

Page 40: ... glue all joints Glue the provided drain trap as shown in Figure 51 or Figure 52 Route the condensate line to an open drain Condensate line must maintain a 1 4 downward slope from the furnace to the drain 5 Figure 46 and Figure 47 show the furnace and evaporator coil using a separate drain If necessary the condensate line from the furnace and evaporator coil can drain together See Figure 48 throug...

Page 41: ...reezing of condensate and blockage of drain line If this is not possible a heat cable kit may be used on the condensate trap and line Heating cable kit is available from Allied in various lengths 6 ft 1 8m kit no 26K68 and 24 ft 7 3m kit no 26K69 Figure 45 Condensate Trap Locations Unit shown in upflow position with remote trap Piping from furnace must slope down a minimum of 1 4 per ft toward tra...

Page 42: ...l drains together the A C condensate drain outlet must be vented to relieve pressure in order for the furnace pressure switch to operate properly IMPORTANT Figure 49 Evaporator Coil Using a Common Drain Figure 50 Evaporator Coil Using a Common Drain Piping from furnace and evaporator coil must slope down a minimum 1 4 per ft toward trap ...

Page 43: ... 2 inch PVC Pipe Not Furnished Drain Assembly for 3 4 inch Drain Pipe Condensate Drain Connection In Unit Condensate Drain Connection In Unit Vent To Drain Condensate Drain Connection In Unit Optional Condensate Drain Connection OptionalDrainPipingFromTrap DrainTrapAssembly Furnished DrainTrap Assembly with 1 2 inch Piping DrainTrap Assembly with 3 4 inch Piping 1 2 inch 3 4 inch 1 25 mm Min 2 50 ...

Page 44: ...ow 1 2 inch PVC To Drain 90 Elbow 1 2 inch PVC Not Furnished 1 2 inch PVC Pipe Not Furnished Drain Assembly for 3 4 inch Drain Pipe 90 Street Elbow 1 2 inch PVC Not Furnished Condensate Drain Connection In Unit Adapter 1 2 inch slip X 1 2 inch mpt Not Furnished Condensate Drain Connection In Unit Vent To Drain Condensate Drain Connection In Unit Drain Trap Assembly with 3 4 inch Piping Vent To Dra...

Page 45: ...tivate the heating demand 5 Wait for the combustion air inducer to stop Set the thermostat to initiate a heating demand and again allow the burners to fire for approximately 3 minutes 6 Adjust the thermostat to deactivate the heating demand and again wait for the combustion air inducer to stop At this point the trap should be primed with sufficient water to ensure proper condensate drain operation...

Page 46: ...iping to the gas valve WARNING Gas supply piping should not allow more than 0 5 W C drop in pressure between gas meter and unit Supply gas pipe must not be smaller than unit gas connection Compounds used on gas piping threaded joints should be resistant to action of liquefied petroleum gases Testing Gas Piping In case emergency shutdown is required turn off the main shut off valve and disconnect t...

Page 47: ...ns each unit should be checked separately with and without other units operating Supply pressure must fall within range listed in Table 17 Manifold Pressure Measurement Follow the steps below and use Figure 55 as a reference Gas manifold Kit 10L34 provides additional components if needed 1 Connect the test gauge positive side to manifold pressure tap on gas valve 2 Tee into the gas valve regulator...

Page 48: ...e 10 0 11 0 13 0 NOTE A natural to L P propane gas changeover kit is necessary to convert this unit Refer to the changeover kit installation instruction for the conversion procedure Table 17 Supply Line and Manifold Pressure at All Altitudes inches w c for 1 Through 3 Units Capacity Gas Manifold Pressure in w g Supply Line Pressure in w g 0 10 000 ft 0 4500 ft 4501 5500 ft 5501 6500 ft 6501 7500 f...

Page 49: ...ltage terminal block on the integrated control See Figure 56 A wide variation in the voltage between Line Neutral and C as a function of load indicates a poor or partial ground Compare the readings to Table 20 If the readings exceed the maximum shown in Table 20 make repairs before operating the furnace 2 In addition measure the AC voltage from Line Hot to Line Neutral spade terminals on the integ...

Page 50: ...ply and return air plenums Insert manometer hose flush with inside edge of hole or insulation Seal around the hose with permagum Connect the zero end of the manometer to the discharge supply side of the system On ducted systems connect the other end of manometer to the return duct as above 3 With only the blower motor running and the evaporator coil dry observe the manometer reading Adjust blower ...

Page 51: ...rd efficiency glass foam filters If the pressure drop is too great system capacity and performance may be reduced The pressure drop may also cause the limit to trip more frequently during the winter and the indoor coil to freeze in the summer resulting in an increase in the number of service calls Before using any filter with this system check the specifications provided by the filter manufacturer...

Page 52: ... may be necessary to cut the exiting exhaust pipe for removal of the fitting 12 Mark and disconnect all combustion air pressure tubing from cold end header collector box 13 Mark and remove wires from pressure switch assembly Remove the assembly Keep tubing attached to pressure switches 14 Disconnect the plug from the combustion air inducer Remove two screws which secure combustion air inducer to c...

Page 53: ...e to certain metals Carefully rinse piping thoroughly after leak test has been completed Do not use matches candles flame or other sources of ignition to check for gas leaks CAUTION Cleaning the Burner Assembly if needed 1 Turn off electrical and gas power supplies to furnace Remove upper and lower furnace access panels 2 Disconnect the wires from the gas valve 3 Remove the burner box cover if equ...

Page 54: ...508107 01 Issue 2041 Page 54 of 58 Wiring Diagram ...

Page 55: ...GIZED GAS VALVE OFF COMBUSTION AIR INDUCER ON INDOOR BLOWER ON HEATING SPEED LED FLASHES CODE 11 PRESSURE SWITCH CLOSED GAS VALVE OFF COMBUSTION AIR INDUCER OFF INDOOR BLOWER OFF WITH DELAY Sequence holds until pressure switch opens or thermostat resets control NO NO YES YES IS VOLTAGE ABOVE 70 VOLTS LED FLASHES CODE 13 LOW LINE VOLTAGE CONTROL WILL NOT RESPOND TO A CALL FOR HEATING UNTIL VOLTAGE ...

Page 56: ...FF WITH DELAY IS 60 MINUTE RESET PERIOD COMPLETE YES 4 SECONDS YES HAS CONTROL RESET IGNITION SEQUENCE FOUR TIMES FLAME SIGNAL 1 5 MICROAMPS OR GREATER YES YES YES ROLLOUT SWITCH CLOSED LED FLASHES CODE 8 ROLLOUT SWITCH OPEN GAS VALVE POWER OFF COMBUSTION AIR INDUCER POWER ON INDOOR BLOWER ON SEQUENCE HOLDS UNTIL ROLLOUT SWITCH IS RESET AND MAIN POWER IS INTERRUPTED OR THERMOSTAT IS CYCLED OFF ON ...

Page 57: ...ONITORED CONTINUOUSLY IS ROLLOUT SWITCH CLOSED LED SLOW FLASH RATE REMAINS UNCHANGED THROUGHOUT COOLING CYCLE THERMOSTAT CALLS FOR COOLING COMPRESSOR CONTACTOR AND SYSTEM FAN ENERGIZED WITH 2 SECOND DELAY COOLING SPEED COMPRESSOR OFF THERMOSTAT OPENS SYSTEM FAN AND EAC TERM OFF WITH 45 SECOND DELAY NO NO LED FLASHES CODE 8 ROLLOUT SWITCH OPEN GAS VALVE OFF COMBUSTION AIR INDUCER ON INDOOR BLOWER O...

Page 58: ...G THERMOSTAT OPENS SYSTEM FAN SWITCHED TO COOL SPEED EAC TERM REMAINS ON THERMOSTAT OPENS MANUAL FAN SELECTION MADE AT THERMOSTAT CONTROL G ENERGIZES SYSTEM FAN AT FAN SPEED EAC TERM ENERGIZED NO YES YES NO SYSTEM FAN SWITCHES TO HEAT SPEAD AFTER 30 SECOND DELAY EAC AND HUM TERMINALS REMAIN ON SYSTEM FAN CONTINUES FAN SPEED WITHOUT INTERRUPTION EAC TERMINAL REMAIN ON HUM TERMINALS ARE ENERGIZED WI...

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