Lennox G60UHX Series Service Manual Download Page 34 | Manualshive

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Page 34

Field Wiring Applications (Continued)

Jumper Settings (See figure 4)

Thermostat

E20

Term. Strip

Y1 to Y2

Wiring Connections

FM21 Heat Pump / 1
Cool

SINGLE

Leave Installed

CONTROL

TERM. STRIP

FM21

75VA, 24V

TRANSFORMER*

*Disconnect existing
furnace transformer and re-
place with 75VA, 24V trans-
former if defrost option to be
used.

NOTE − Wiring connections to
outdoor unit and thermostat
made at FM21 control board
per FM21 instructions.

NOTE −
Remove Y1/Y2
jumper for two−
stage cooling.

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Summary of Contents for G60UHX Series

Page 1: ...tion only and do not supersede or replace local or state codes In the absence of local or state codes the guidelines and procedures outlined in this manual except where noted are recommendations only...

Page 2: ...A 2F C33 38A 2F Horizontal CH33 18A 2F CH33 24 30A 2F CH33 36A 2F Electrical characteristics 120 volts 60 hertz 1 phase less than 12 amps OPTIONAL ACCESSORIES MUST BE ORDERED EXTRA Air Filter and Rack...

Page 3: ...tal CH33 36B 2F CH33 42B 2F CH33 44 48B 2F CH33 36C 2F CH33 48C 2F CH33 50 60C 2F Electrical characteristics 120 volts 60 hertz 1 phase less than 12 amps OPTIONAL ACCESSORIES MUST BE ORDERED EXTRA Air...

Page 4: ...f filters Horizontal end 87L97 1 20 x 25 x 1 in 508 x 635 x 25 mm 87L97 1 20 x 25 x 1 in 508 x 635 x 25 mm 87L98 1 25 x 25 x 1 in 635 x 635 x 25 mm Side Return Single 44J22 or Ten Pack 66K63 1 16 x 25...

Page 5: ...010 475 400 860 405 350 675 320 270 0 50 125 975 460 390 840 395 340 660 310 265 0 60 150 940 445 375 805 380 325 640 300 255 0 70 175 890 420 360 755 355 305 605 285 240 0 80 200 830 390 340 700 330...

Page 6: ...535 1070 505 430 910 430 350 0 20 50 1490 705 670 1295 610 525 1065 505 420 900 425 340 0 25 62 1465 690 655 1280 605 510 1060 500 415 890 420 335 0 30 75 1440 680 645 1260 595 495 1050 495 405 880 4...

Page 7: ...5 1150 545 520 0 30 75 1820 860 765 1580 745 675 1330 630 590 1145 540 515 0 40 100 1740 820 725 1530 720 635 1320 625 560 1140 540 490 0 50 125 1665 785 695 1475 695 600 1285 605 525 1120 530 470 0 6...

Page 8: ...15 37 2350 1110 1165 2230 1050 1025 2070 975 900 1830 865 755 0 20 50 2310 1090 1150 2195 1035 1010 2045 965 890 1805 850 745 0 25 62 2265 1070 1135 2155 1015 995 2010 950 875 1785 840 735 0 30 75 22...

Page 9: ...5 2330 1100 1274 2150 1015 961 1900 895 815 1635 770 677 20 50 2255 1065 1234 2095 990 930 1885 890 794 1625 765 664 30 75 2190 1035 1207 2035 960 902 1855 875 769 1620 765 651 40 100 2115 1000 1179 1...

Page 10: ...E HIGH ALTITUDE MANIFOLD PRESSURE INFORMATION Altitude Manifold Pressure t ll ltit d Model Input Gas 0 4500 ft 0 1372 m 4 501 7500 ft 1373 2286 m 7501 10 000 ft 2286 3048 m at all altitudes Input Size...

Page 11: ...Circuit Breaker Gasket Flue Box Gasket Limit Shield Secondary Limit s NOx Units Only Air Deflector G60UH 60C 110 Units Only Blower Motor Capacitor Flame Sensor Gas Valve Burners Ignitor Flame Rollout...

Page 12: ...R CB8 PRESS TO RESET WARNING Shock hazard Disconnect power before servicing Integrated Control Board is not field repairable If control is inoperable simply replace entire control Can cause injury or...

Page 13: ...Fan off Delay The fan on time of 45 seconds is not adjustable Fan off time time that the blower operates after the heat demand has been satis fied can be adjusted by flipping the dip switches 1 and 2...

Page 14: ...sformer LINE Line PARK For Unused Leads COOL Cooling Speed EAC Electronic Air Cleaner HI HEAT HIigh Heat Speed LO HEAT Low Heat Low Cool and Continuous Fan Speed TABLE 4 Integrated Control Board 5 Pin...

Page 15: ...to board OFF ON Circuit board failure or control wired incorrectly Check 24 and 115 volts to board FAST FLASH SLOW FLASH Main power polarity reversed Switch line and neutral SLOW FLASH FAST FLASH Low...

Page 16: ...ICROAMPS DROP OUT SIGNAL 0 16 MICROAMPS 5 16 7 Ignitor The SureLight ignitor is made of durable silicon nitride Ig nitor longevity is enhanced by controlling voltage to the ig nitor The board finds th...

Page 17: ...sket and combustion air inducer then reinstall the mounting screws See figure 8 Use the provided wire tie to bundle the pressure switch wires with the inducer motor power leads Route the wires away fr...

Page 18: ...ustment screw is located on the valve LPG change over kit s are available from Lennox Kits include burner orifices and a gas valve regulator conversion kit 13 Combustion Air Inducer Prove Switch S18 G...

Page 19: ...Turn knob on gas valve clockwise to OFF Do not force See figure 11 7 Wait five minutes to clear out any gas If you then smell gas STOP Immediately call your gas supplier from a neighbor s phone Follow...

Page 20: ...s Leak Detector is strongly recommended It is available through Lennox under part number 31B2001 See Corp 8411 L10 for further details Do not use matches candles flame or any other source of ignition...

Page 21: ...Seconds for One Revolution G60UH Natural LP G60UH Unit 1 cu ft Dial 2 cu ft Dial 1 cu ft Dial 2 cu ft DIAL 45 82 164 205 410 70 55 110 136 272 90 41 82 102 204 110 33 66 82 164 135 27 54 68 136 Natur...

Page 22: ...perates continuously With fan switch in AUTO position blower cycles with demand or runs continuously while heating or cooling circuit cycles 3 Depending on the type of indoor thermostat blower and ent...

Page 23: ...elocity air flow C Flue And Chimney Check the flue pipe chimney and all connections for tight ness and to make sure there is no blockage D Electrical 1 Check all wiring for loose connections 2 Check f...

Page 24: ...er section Vacuum debris from bottom open ings 14 Replace collector box and combustion air inducer Check gaskets for damage Damaged gaskets must be replaced to avoid heat exchanger leaks Replace all s...

Page 25: ...Page 25 VII Wiring and Sequence of Operation G60UH 1 2 3...

Page 26: ...Page 26 G60UH 4 5...

Page 27: ...stage heat ignitor de energizes 5 After 45 second delay indoor blower B3 is energized on low heat speed The furnace will stay in this mode until first stage de mand is satified OR a second stage heat...

Page 28: ...PRIMARY AND SECONDARY LIMIT SWITCHES CLOSED YES NO COMBUSTION AIR INDUCER OFF INDOOR BLOWER ON HAS PRIMARY OR SECONDARY LIMIT RESET WITHIN 3 MINUTES DS1 SLOW FLASH DS2 ON ROLLOUT SWITCH CLOSED GAS VAL...

Page 29: ...PLACED OR RECONNECTED DS1 AND DS2 ALTERNATING FAST FLASH YES AT END OF IGNITOR 20 SECOND WARM UP PERIOD 4 SECOND TRIAL FOR IGNITION GAS VALVE OPENS IGNITOR ENERGIZED DURING 4 SECOND TRIAL UNTIL FLAME...

Page 30: ...FF AFTER DELAY DS1 OFF DS 2 SLOW FLASH NO YES C FIRST STAGE HEAT DEMAND SATISFIED DS1 AND DS2 SIMULTANEOUS SLOW FLASH GAS VALVE OFF COMBUSTION AIR INDUCER OFF FOLLOWING POST PURGE INDOOR BLOWER OFF WI...

Page 31: ...PERIOD IS INITIATED BEFORE RETRY WERE 5 ATTEMPTS MADE FOR SECOND STAGE HEAT YES NO SEE BOX C FIRST STAGE HEAT DEMAND SATISFIED HEAT DEMAND SATISFIED DS1 AND DS2 SIMULTANEOUS FAST FLASH YES TWO STAGE...

Page 32: ...FAN SELECTION MADE AT THERMOSTAT AFTER 2 SECOND DELAY INDOOR BLOWER IS ENERGIZED ON CONTINUOUS FAN SPEED LOW HEAT LOW COOL THERMOSTAT CALLS FOR FIRST STAGE HEAT THERMOSTAT CALLS FOR FIRST STAGE COOL...

Page 33: ...ON 10 minutes OFF 15 minutes SINGLE Leave Installed S1 T STAT CONTROL TERM STRIP OUTDOOR UNIT HSXB15 LSOM 1 Heat 2 Cool NOTE Use dip switch 3 to set second stage heat ON delay ON 10 minutes OFF 15 mi...

Page 34: ...ump 1 Cool SINGLE Leave Installed CONTROL TERM STRIP FM21 75VA 24V TRANSFORMER Disconnect existing furnace transformer and re place with 75VA 24V trans former if defrost option to be used NOTE Wiring...

Page 35: ...nsformer output is 24V Replace if defective 1 1 6 Failed control board ACTION 1 If all the above items have been checked replace board 1 2 Diagnostic lights flash the reverse ACTION 1 Check the 120V h...

Page 36: ...iagnostic lights flash the pressure 2 2 1 Miswiring of furnace or improper con nections to combustion air inducer ACTION 1 Check for correct wiring and loose connections Correct wiring and or replace...

Page 37: ...ired LED 2 Slow Flash 4 1 4 Condensate in pressure switch line ACTION 1 Check pressure switch line for con densate Remove condensate from line 4 1 5 Pressure switch does not close due to a low differe...

Page 38: ...ure switch code LED 1 Off LED 2 Slow Flash 6 1 1 Low pressure differential at the pres sure switch ACTION 1 Check for restricted exhaust vent Remove all blockage ACTION 2 Check for proper vent sizing...

Page 39: ...estrictions in the heat exchanger assembly Clean assembly as outlined in instruction manu al ACTION 2 Check for proper combustion See IV Heating System Service Checks section G 6 3 4 Burners are not p...

Page 40: ...improperly located on the burner ACTION 1 Check the sense rod for proper loca tion on the burner Properly locate the sense rod or replace if rod cannot be located correctly code LED 1 Slow Flash LED 2...

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