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Lennox International Inc. G32Q4-125 - page 1
LENNOX _2001 Lennox Industt]e-_ _nc Dallas Texas USA INSTALLATION INSTRUCTIONS G32Q SERIES UNITS GAS UNITS 504,488M _[_2ech nical 11/2001 blications Supersedes 504,382M Litho U.S.A. RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE IT a hi6 of_ _ _ te:nts i :: Unit Dimensions ................................ 2 G32Q Parts Arrangement .................. ...
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Lennox International Inc. G32Q4-125 - page 2
1 1116 (41) _8 (16)'-IP 1 1116 3 5/8 ,o-o I • v 151 ) AIR OUTLET TOP VIEW "ql'-- 28 1/2 (724) I I ELECTRICA INLETS _ {Both Sides) m L _____(Either Side) J Lt:;:"ZtJ Return Air Knockout (Bottom) SIDE VIEW T 21 3/4 (552) GAS PIPING INLET (Both Sides) 91- 4(102) T 46 (1168) EXTERNAL SIDE RETURN /_R FIL'I1ER K]T (Either Side ...
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Lennox International Inc. G32Q4-125 - page 3
GLASS FIBER GASKET FRESH AIR INTAKE FITTING BURNERBOX ASSEMBLY PATCH FLUE COLLAR TOP CAP WARM HEADER _I (COLLECTORTH_ _ . BOX / / PATCH PLATE WITH l BARBED FITTING AND FLAME ROLL-OUT SWITCH FLUE DuralokPlus TM HEAT EXCHANGER ASSEMBLY CABINET RESSURE-. FLAME SIGHT p swrrcH GLASS / BURNER BOX / HIGH HEAT COVER ]3NO-STAGE PRESSURE GAS VALVE AND SWITCH ...
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Lennox International Inc. G32Q4-125 - page 4
Lennox G32Q units are CSA International certified to ANSI Z21.47 and CSA 2.3 standards. In the USA, installation of Lennox gas central furnaces must conform with local building codes. In the absence of local codes, units must be installed according to the cur- rent National Fuel Gas Code (ANSI-Z223.1) in the United States. The National Fuel Gas Cod ...
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Lennox International Inc. G32Q4-125 - page 5
NOTE - G32 senes units must not be used as a construc- tion heater dunng any phase of construction. Very low re. turn air temperatures, harmful vapors and misplacement of the filters will damage the unit and lower its efficiency. The G32Q is an upflow gas furnace. A changeover kit is necessary if the furnace is to be used with L.P. gas, These instr ...
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Lennox International Inc. G32Q4-125 - page 6
Bottom Return Air Applications If return air is to terminate through the floor under the fur- nace, a direct, airtight and sealed connection must be made to the bottom of the furnace, 1 - Cut opening in floor or platform. Using knockouts provided, cut bottom of base panel. See figure 2. KNOCKOUT PATTERN FOR BOTTOM RETURN AIR APPLICATION ,v vd iV Vd ...
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Lennox International Inc. G32Q4-125 - page 7
FILTER DOOR ASSEMBLY FILTER DO0_ _ PIN _T_ TAB FILTER DOOR I I I _'l]l FILTER FIGURE 6 4 - Position filter door on end offilter so that the thumb tab side of the filter door is away from the furnace. Squeeze thumb tabs to secure filter to door. 5 - Guide filter and filter door into the filter rack installed on side of furnace. Push door into f ...
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Lennox International Inc. G32Q4-125 - page 8
Lennox Part No. 60G77 33K97 15F75 22G44 15F74 44J41 44J40 30G28 30G79 LB-49107CE LB-87942 LB-49107CC LB-49107CD LB_9107CB LB-65678A LB-65701A WTK WTKX TABLE 3 TERMINATION KITS Kit LB# Description*Inches (ram) 1-1/2" (38) Concentric Termination Kit 3" (50,8) Low Pressure Drop Concentric Term Kit 2" (50,8) Roof Termination Kit 2" ...
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Lennox International Inc. G32Q4-125 - page 9
All cementing of joints should be done according to the specifications outlined in ASTM D 2855. 1 - Measure and cut vent pipe to desired length. 2 - Debur and chamfer end of pipe, removing any ddges or rough edges. If end is not chamfered, edge of pipe may remove cement fTom fitting socket and result in a leaking joint. 3 - Clean and dry surfaces t ...
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Lennox International Inc. G32Q4-125 - page 10
{ NOTE - Exhaust piping should be checked carefully to make sure there are no sags or low spots. NOTE - Exhaust piping must be Insulated wffh 1/2 inch (13 ram) Armaflex or equivalent when nJn through un- heated space. Do not leave any area of exhaust pipe open to outside air. extenor exhaust must be insulated wrth 1/2 inch (13 ram) Armaflex or equi ...
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Lennox International Inc. G32Q4-125 - page 11
On roof terminations, the intake piping should termi- nate straight down using two 90 ° elbows. See figure 8. NOTE - If winter design temperature is below 32°F (O°C), exhaust piping must be insulated with 1/2 inch (13 mm) Armaflex or equivalent when run through unheated space. Do not leave any surface area of exhaust pipe open to outside air,&qu ...
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Lennox International Inc. G32Q4-125 - page 12
1/2 (12.7) FOAM INSULATION IN UNCONDITIONED SPACE Inches (mm) n OUTSIDE WALL qlp Optional Turndown Shown (Intake Onty) TOP VIEW WALL TERMINATION (22G44) LB-49107CD for 2 (50,8)Venting (44J40) LB-65701A for 3 (76.2) Venting FIGURE 11 EXHAUST INTAKE Inches (ram) EXHAUST TERMINATION abovegrade, CONCENTRIC WALL TERMINATION (60G77) LB-49107CE for G32-75 ...
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Lennox International Inc. G32Q4-125 - page 13
Inches(turn) 1/2 (13) 3 x 2 {76 x 51) OR FOAM 2 x 1 .t/2 (61 x 36) INSULATION REDUCER BUSHING LOCATION 3 (76) OR FOR OFFSET TERMINATION 2 (51) 90 _ ELBOW 3 (76) OR Optional Turndown _ _ 2 (5t) 90" ELBOW (Not Shown) May Be Used on Intake Only FRONT VIEW WALL TERMINATION (22G44) LB-49107CD for 2(51) Venting (44J40) LB-65701A for 3(76) Venting FI ...
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Lennox International Inc. G32Q4-125 - page 14
Inches (mm) Front View [ 34 9 _, EXHAUST I '10" VENT = _ NOTE - Enclosed ex_us_ pipe _s insuleted w;th _F2 i,_Ch (13 ram) INTAKE foam insu_abon If in_al(e ar_ ex- VENT hsusl I_pes am reversed, sl=l and r_move foam instJlat_ot_ and Ii teat)ply to OUmr vent Exhaust vent mr=st be insulated Side View 4 USTVENT o iNTAKE VENT E VENT TERMINATION ...
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Lennox International Inc. G32Q4-125 - page 15
CONDENSATE PLUMBING (Plumbing must be vented higher than coll.) FIGURE 22 6- Connect condensate drain line (1/2 inch [13 mm] SDR 11 plastic pipe or tubing) to condensate con- nection on condensate trap assembly and route to open drain. Condensate line must be sloped down- ward away from drip leg to drain. If the drain level is above condensate outl ...
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Lennox International Inc. G32Q4-125 - page 16
Nominal Iron Pipe Size -InchesImm) t/4 (635) 3/8 (6,53) (127) 314 (19.05) 1 (254) 1-1/4 (31.75) Io1/2 (381) 2 (5O.8) 2-112 (83.5) 3 (76.2) 4 (101.6) NOTE - Capacity j TABLE 5 GAS PIPE CAPACITY - ft.3/hr Im31hrl Internal Length of Pipe-Feet (m) Diameter 10 20 30 40 50 60 70 80 90 100 .InchesImm) (3.048) (6.096) (9.144) (12.192) 115.2401 (18.288) (21 ...
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Lennox International Inc. G32Q4-125 - page 17
3- Electrically ground unit in accordance with local codes or, in the absence of local codes, in accor- dance with the current National Electric Code (ANSI/ NFPA No. 70) and in Canada with the current Cana- dian Electric Code part 1 (CSA standard C22.1). The ground wire is provided in the field make-up box. To ensure proper grounding of the furnace ...
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Lennox International Inc. G32Q4-125 - page 18
G32Q CONTROL BOX DOOR INTERLOCK SWITCH SURELIGHT / CONTROL TRANSFORMER ._,_ C=RCU_ '_1_ _BREA_ER TWO_TAGE _ _'--'-CONTROL BOARD FIGURE 29 SURELIGHT INTEGRATED CONTROL BOARD IIZ II LO_ TX HOT :_(_ ,_ "_-III 0110 UIIO I -- ÷ _.._, .. _ ÷ L_____J _ FAN DELAY SFJ_-_E JI o.P -- I I i I I I I ........... J J _.__ _--.-J ® ® Y G W ...
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Lennox International Inc. G32Q4-125 - page 19
G32Q TWO-STAGE CONTROL BOARD 0 MODE OF OPERATION JUMPER (Factory set at TWO STAGE) FIGURE 31 TYPICAL G32Q FIELD WIRING DIAGRAM W2 TIMED ON DELAY JUMPER (Factoryset at 8 minutes.) FIGURE 32 Page 19 ...
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Lennox International Inc. G32Q4-125 - page 20
F20M /_C 4.5 E]_(4 I|F IJ_D] O Ll'_b_m II I I I I it i I i i IIilll I --_' TYPICAL G32Q SCHEMATIC WIRING DIAGRAM ,,o HION NEAT srj Ti_ IVI SlO Ul_ LIMIT SI]_ c_urr l_ AiR Lml_ W_ r---n 2 (ill FIGURE 33 Page 20 ...
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Lennox International Inc. G32Q4-125 - page 21
FOR YOUR SAFETY READ BEFORE OPERATING WARNING CAUTION BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor. This unit is equipped with a gas control knob. Use only your hand to turn the gas control knob. Never use tools. If knob will not tu ...
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Lennox International Inc. G32Q4-125 - page 22
4- After the prepurge is complete and the pressure switch is closed, a 20-second initial ignitor warm-up period begins. 5 - After warm-up period, gas valve is energized on sec- ond stage (high heat). 6 - Gas valve opens and gas is ignited. When flame is established, flame sensor sends signal to control module to de-energize the ignitor. NOTE - If t ...
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Lennox International Inc. G32Q4-125 - page 23
Model No. G32-75 natura_ G32-100 natural G32-125 natural G32-75 L.P G32-100 L,P. G32-125 L,P. 0 to 4500 ft. (0 to 1372 m) above sea level 3.8 3.5 (0.87) 7.5 7.5 (1.90) 7.5 11.90) TABLE 6 Manifold Pressure (outlet) in. w.g (kPa) 4501 to 5500 ft. (1373 to 1676 m) above sea level 3,5 34(0.85) 7.5 7.3 (1.81) 7.3 (1.81 } 5501 to 6500 ft. (1677 to 1981 m ...
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Lennox International Inc. G32Q4-125 - page 24
FAN*OFF DELAY ADJUSTMENT 60sec, 90sec. 120sec, 180sec. To adjust fan-off delay, flip dip switch to desired setting. FIGURE 36 Temperature Rise Check temperature rise and, if necessary, adjust blower speed to maintain temperature rise within range shown on unit rating plate. Two-Stage Control The two-stage control allows the field selection of one o ...
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Lennox International Inc. G32Q4-125 - page 25
2 - Have a shallow pan ready to empty condensate wa- ter. Avoid spilling water into the control box. 3 - Remove clamp from flue assembly and remove boot or cap. Empty water from cap. Visually inspect bot- tom of flue assembly. Replace boot and clamp. 4 - Remove boot from condensate trap and empty wa- ter. Inspect trap then replace boot. Cleaning Du ...
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Lennox International Inc. G32Q4-125 - page 26
34 - Reconnect widng to gas valve. Brown wire to "HI," yellow wire to "C" and orange wire to "M." Reconnect wires to name roll-out switch. NOTE - Unit is polarity-sensitive. 120V supply wiring must be installed correctly 35 - Reconnect main gas line to gas valve. Use second wrench on gas valve to avoid transferring tor ...
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Lennox International Inc. G32Q4-125 - page 27
The following repair parts are available through independent Lennox dealers. When ordering parts, include the complete furnace model number listed on the unit rating plate. Example: G32Q3-75-1. CABINET PARTS Cabinet cap Blower panel Upper access panel CONTROL PANEL PARTS Two-Stage control board Surelight TM integrated control board Transformer Circ ...
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Lennox International Inc. G32Q4-125 - page 28
HEATING SEQUENCE OF OPERATION NORMAL HEATING MODE ABNORMAL HEATING MODE I I I I I I POWER ON I CONTROL SELF-CHECK OKAY? I _ COMBUSTION AIR iNDUCER ON FOR 1 SECOND. I POLARITY OKAY? YES _ ROLLOUT SWITCH CLOSED? YES BURNER OFF? (CONTINUOUS FLAME CHECK) YES _ NORMAL OPERATION: LED #1 -- SIMULTANEOUS SLOW FLASH LED #2 - SIMULTANEOUS SLOW FLASH THERMOST ...
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Lennox International Inc. G32Q4-125 - page 29
HEATING SEQUENCE CONTINUED NORMAL HEATING MODE J PREPURGE J_ 15 SECONDS l IGNITION SEQUENCE BEGINS (Ignition tfiatcounter initiated.) ABNORMAL HEATING MODE j (s, GW'N_%_,%_0,0_',_",G%EF%%%, / GAS VALVE OFF. COMBUSTION AIR AND INDOOR BLOWER OFF. J- ALTER_"%_ _NL%t _F_SRES / MAIN GAS VALVE OPEN LOW HEAT ONLY (Ignitorremains energi ...
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Lennox International Inc. G32Q4-125 - page 30
HEATING SEQUENCE CONTINUED NORMAL HEATING MODE ABNORMAL HEATING MODE I PRESSURE SWtTCH CLOSED? ! 11 L'WO'STAGE'OOE I S,N";L;'S_;_%T CALL FOR 2ridSTAGE 2ridSTAGEON DELAY HEAT (HIGH HEAT) ON CONTROL BOARD FROM THERMOSTAT COMPLETE (B, 12 OR 15 MIN I INDOOR BLOWER ON HIGH HEATING SPEED? 1 I COMBUSTION AIR BLOWER ON HIGH SPEED? ...
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Lennox International Inc. G32Q4-125 - page 31
COOLING SEQUENCE OF OPERATION NORMAL COOLING MODE ABNORMAL COOLING MODE I POWER ON I I IGNITION CONTROL MAIN POWER ON. I CONTROL SELF DIAGNOSTIC CHECK. IS CONTROL OPERATING NORMALLY? YES _1 I TURN INDUCER ON FOR 1 SECOND. I IS POLARITY REVERSED? SIGNAL HOLDS" N_ PRo/SE THERo E ._ I YEs-J UNTIL UNIT IS I-_=-I ERR UND._ GPRRoOuPNEDRELY" I I ...
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Lennox International Inc. G32Q4-125 - page 32
SURELIGHT CONTROL CONTINUOUS FAN SEQUENCE OF OPERATION I LED: SLOW FLASH RATE REMAINS I UNCHANGED THROUGHOUT SEQUENCE, MANUAL FAN SELECTION MADE AT THERMOSTAT, CONTROL (G) ENERGIZES INDOOR BLOWER AT ACB LOW SPEED. ACC. TERM. S ENERG ZED i T.ERMOSTATCA,LSFORHEAT_W_ i--'1%_O_"_%_g"_'_ S , _¥ES SPEED AFTER NORMAL DELAY. I,NDOOR BL ...
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