LENNOX INSTALLATION INSTRUCTIONS _2001 Lennox Industt]e-_ _nc Dallas Texas USA G32Q SERIES UNITS GAS UNITS 504,488M 11/2001 _[_2ech Supersedes504,382M ITahi6 of_ _ _te:nts RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE nical blications Litho U.S.A. i :: Unit Dimensions ................................ G32Q Parts Arrangement ....................... Requirements .................................. General ....................................... Installation - Setting Equipment ..................
1 1116 3 5/8 1 1116 (41) ,o-oI _8 (16)'-IP • v AIR OUTLET 151 ) TOP VIEW "ql'-- 28 1/2 (724) ,lira I I T T 21 3/4 (552) A_ I I m 46 (1168) ELECTRICA INLETS_ {BothSides) EXTERNAL SIDE RETURN /_R FIL'I1ERK]T (Either Side O_onal , GAS PIPING INLET (Both t Sides) AIR FLOW 91- 4(102) L _____(Either Side) J Lt:;:"ZtJ 4 (I02) E-IP Return Air Knockout (Bottom) Return Air Knockout (Bottom) SIDE VIEW FRONT VIEW A Model No. B C D E F G H in. I mm in. mm in.
GLASS FIBER GASKET FLUE COLLAR FRESH AIR INTAKE FITTING TOP CAP HEADER BURNERBOX ASSEMBLY . / / PATCH _I BOX (COLLECTORTH_ _ PATCH PLATE WITH l BARBED FITTING WARM AND FLAME ROLL-OUT SWITCH CABINET FLUE DuralokPlus TM HEAT EXCHANGER ASSEMBLY FLAME SIGHT p GLASS / BURNER BOX / COVER ]3NO-STAGE GAS VALVE AND MANIFOLD RESSURE-. swrrcH HIGH HEAT PRESSURE SWITCH (-75 only) 4.
Lennox G32Q units are CSA International ANSI Z21.47 and CSA 2.3 standards. In the USA, installation of Lennox certified to ing units to avoid condensation in the heating compartment. With a parallel flow arrangement, a damper (or oth- gas central furnaces must conform with local building codes. In the absence of local codes, units must be installed according to the current National Fuel Gas Code (ANSI-Z223.1) in the United States.
NOTE - G32 senes units must not be used as a construction 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 instructions are intended as a general guide and do not supersede Focal codes in any way. Consult authorities having jurisdiction before installation.
Bottom Return Air Applications If return air is to terminate Bottom through the floor under the fur- nace, a direct, airtight and sealed connection made to the bottom of the furnace, must be 1 - Cut opening in floor or platform. Using knockouts provided, cut bottom of base panel. See figure 2. Return Air Applications 1 - Remove blower access panel. 2- Install filter clips, provided with unit, by slipping folded section of clip on edge of bottom opening. See figure 4.
FILTER DOOR ASSEMBLY FILTER DO0_ PIN FILTER DOOR _ _T_ TAB a gas appliance is operating in a room with negative pressure, the flue products can be pulled back down the vent pipe and into the room. This reverse flow of the flue gas may result in incomplete combustion and the formation of carbon monoxide gas. This toxic gas might then be distributed through the house by the furnace duct system.
TABLE 3 TERMINATION KITS Lennox Part No. 60G77 33K97 15F75 22G44 Kit LB# LB-49107CE LB-87942 LB-49107CC LB-49107CD 15F74 LB_9107CB 44J41 LB-65678A 44J40 30G28 30G79 LB-65701A WTK WTKX Description*Inches TABLE 4 VENT PIPE SIZING TABLE FOR G32Q FURNACES MINIMUM DIAMETER OF INTAKE/EXHAUST PIPE (ram) 1-1/2" (38) Concentric Termination Kit 3" (50,8) Low Pressure Drop Concentric Term Kit 2" (50,8) Roof Termination Kit 2" (50.8) Well Assembly Termination Kit 2" (50.
Iventingractl es All cementing specifications of joints should be done according outlined in ASTM D 2855. The thickness of construction through which vent!air intake pipes may be installed is a minimum of 3 inches (76 mm) and a maximum of 24 inches (610 mm). If a G32 furnace replaces a furnace which was commonly vented with another gas appliance, the size of the existing vent pipe for that gas appliance must be checked.
5 - Test for spillage at the draft hood relief openingafter 5 minutes of main burner operation. Use the flame of NOTE - Exhaust piping should be checked carefully to make sure there are no sags or low spots. match or candle, or smoke from a cigarette or cigar, or a draft gauge. NOTE - Exhaust piping must be Insulated wffh 1/2 inch (13 ram) Armaflex or equivalent when nJn through unheated space. Do not leave any area of exhaust pipe open to outside air.
On roof terminations, the intake piping should terminate straight down using two 90 ° elbows. See figure 8. EXHAUST 12 (305) ABOVE AVERAGE SNOW ACCUMULATION INTAKE TERMINATION 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," exterior exhaust pipe must be insulated with 1/2 inch (13 ram) Armaflex or equivalent.
1/2 (12.7) FOAM INSULATION IN UNCONDITIONED SPACE courtyard areas or other recessed areas. Do not position termination ends directly below roof eaves or above a walkway. Since the G32 is a certified direct vent, Category iV gas furnace, the location of the termination is limited by local building codes. In the absence of local codes, refer to the current National Fuel Gas Code ANSI Z223-1 in USA, and current standard CAN/CGA-B149.1 of the Natural Gas Installation Instructions in Canada for details.
Inches(turn) 1/2 (13) FOAM INSULATION Front View EXHAUST 3 x 2 {76 x 51) OR 2 x 1.
freezing of the condensate, which would block the drainline. Use an electric heat cable if you route the condensate line through unconditioned areas. 9 Inches (mm) [ Front View I '10" _, EXHAUST = _ INTAKE NOTE - Enclosed ex_us_ pipe _s insuleted w;th _F2 i,_Ch(13 ram) foam insu_abon If in_al(ear_ ex- VENT hsusl I_pes am reversed, sl=land 34 VENT r_move foam vent mr=st be instJlat_ot_ A insulated 1 - Determine Ii CAUTION and which side condensate will exit the unit.
3 - The gas piping must not run in or through air ducts, clothes chutes, gas vents or chimneys, dumb waiters or elevator shafts. Center gas line through piping hole. Gas line should not touch side of unit. When left-hand gas plumbing is required, gas line should be installed in the lower half of knockout so that piping will clear combustion air inducer. See figure 24. 4 - The piping should be sloped 1/4 inch (6.4 mm) per 15 feet (4.57 m) upward toward the meter from the furnace.
TABLE 5 GAS PIPE CAPACITY Nominal Iron Pipe Size -InchesImm) NOTE - ft.3/hr Im31hrl Internal Length of Pipe-Feet (m) Diameter .InchesImm) 10 (3.048) 20 (6.096) 30 (9.144) 40 (12.192) 50 115.2401 60 (18.288) t/4 (635) 364 (9 246) 43 (1 13) 29 (.82) 24 (68) 29 (.57) 18 (81) 18 (45) 15 ( 401 14 (40} 19 (3?) 12 (.34) 3/8 (6,53) 493 (12.5221 95 (269) 65 (1.84) 52 (1 47) 45 (127) 40 (113) 36 (1.02) 33 (73) 31 (88) 29 (.82) 27 (75) (127) 622 (17.
3- Electrically ground unit in accordance with local codes or, in the absence of local codes, in accordance with the current National Electric Code (ANSI/ NFPA No. 70) and in Canada with the current Canadian Electric Code part 1 (CSA standard C22.1). The ground wire is provided in the field make-up box. EXTERIOR MAKE-UP BOX INSTALLATION BUSHING To ensure proper grounding of the furnace, two star washers are included in the electrical make-up box bag assembly.
G32Q CONTROL BOX DOOR INTERLOCK SWITCH ._,_ C=RCU_ TRANSFORMER '_1_ _BREA_ER SURELIGHT CONTROL / TWO_TAGE BOARD _'--'-CONTROL _ FIGURE 29 SURELIGHT INTEGRATED CONTROL BOARD "_-III IIZ II LO_ 0110 TX HOT :_(_ UIIO ,_ I -÷ _.._, .. _ ÷ L_____J FANDELAY o.P _ SFJ_-_E TERMINAL DESIGNATION_ Blower - Coollr_ Bleed {Line Volt) Blower- Heatina SPeed (Line Volt) AJtemateBlower SPeeds (Dead} ContinuousLow Speed Blower AccessoryTerminal (Line VoW4amp max.
G32Q TWO-STAGE CONTROL BOARD MODE OF OPERATION JUMPER (Factory set at TWO STAGE) W2 TIMED ON DELAY JUMPER (Factoryset at 8 minutes.
TYPICAL G32Q SCHEMATIC F20M /_C 4.
5 - Remove unit access panel. FOR YOUR SAFETY READ BEFORE 6 - Turn gas valve knob to OFF position. See figure 34. OPERATING 7 - Wait five (5) minutes to clear out any gas. If you then smell gas, STOP! Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions. If you do not smell gas go to next step.
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 second 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 the flame is not detected after the first ignition attempt, the control module de-energizes the gas valve and the prepurge / ignition sequence is repeated.
TABLE 6 Manifold Pressure (outlet) in. w.g (kPa) Model No. 0 to 4500 ft. (0 to 1372 m) above sea level 4501 to 5500 ft. (1373 to 1676 m) above sea level 5501 to 6500 ft. (1677 to 1981 m) above sea level 6501 to 7500ft, (1982to2286 m) above sea level 3.8 3,5 35 3.5 3.3 (0.82) 3.2 (0.80) G32-75 natura_ G32-100 natural 3.5 (0.87) G32-125 natural 34(0.85) 7.5 7.5 7.5 7.5 G32-100 L,P. 7.5 (1.90) 7.3 (1.81) 7.1 (1.80) 7.0 (1.74) G32-125 L,P. 7.5 11.90) 7.3 (1.81 } 7.1 (1.8o) 7.0 (1.
FAN*OFF DELAYADJUSTMENT 60sec, To adjust fan-off 90sec. 120sec, delay, flip dip switch FIGURE to desired 180sec. setting. 36 Temperature Rise Check temperature rise and, if necessary, adjust blower speed to maintain temperature rise within range shown on unit rating plate.
2 - Have a shallow pan ready to empty condensate water. Avoid spilling water into the control box. 17 - Disengage strain relief bushing from blower deck and pull bushing and wires into the blower section. 18 - Remove the limit switch and the pressure switch(es) from the vestibule panel. 19 - Remove two screws from the front cabinet flange at the blower deck. Remove front screws from cabinet at blower deck on left and right sides. Cabinet sides must be slightly spread to clear heat exchanger passage.
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. must be installed correctly 120V supply wiring 35 - Reconnect main gas line to gas valve. Use second wrench on gas valve to avoid transferring torque to the gas manifold. 36 - Reinstall field make-up box if removed. 37 - Reinstall exhaust pipe/flue collar and secure flue collar to the unit top cap using existing screw.
The following repair parts are available through independent furnace Lennox dealers. When ordering parts, include the complete model number listed on the unit rating plate. Example: CABINET Cabinet cap Blower panel Main burner orifices Main burners Upper access panel CONTROL PANEL PARTS Two-Stage Two-stage Ignitor control board Surelight TM integrated Transformer G32Q3-75-1.
HEATING SEQUENCE NORMAL I I HEATING POWER ON MODE ABNORMAL I_ COMBUSTION AIR iNDUCER ON FOR 1 SECOND. I HEATING MODE GAS VALVE OFF. COMBUSTION AIR INDUCER INDOOR BLOWER DELAY OFF, LED #1 ON LED #2 ON I CONTROL SELF-CHECK OKAY? (RESET CONTROL BY TURNING MAIN OFF. POWER OFF,) GAS VALVE OFE COMBUSTION AIRINDUCER INDOOR BLOWER OFF DELAY. LED #1- ON LED #2 - SLOW FLASH OFE POLARITY REVERSED.
HEATINGSEQUENCECONTINUED NORMAL J HEATING ABNORMAL MODE 15 PREPURGE SECONDS HEATING J_ l GAS VALVE OFF. COMBUSTION AIR AND INDOOR BLOWER OFF. j (s, GW'N_%_,%_0,0_',_",G%E // ALTER_"%_ _NL%t _F_SRES IGNITION SEQUENCE BEGINS (Ignition tfiatcounter initiated.) WATCHGUARD i IGNITOR (20 SECONDS) WARM-UP J-lr TWO-STAGE MODE "_- | I CALLFOR Ist STAGEHEAT j L _.
HEATINGSEQUENCE CONTINUED NORMAL HEATING MODE ABNORMAL HEATING MODE I I ! 11 L'WO'STAGE'OOE I S,N";L;'S_;_%T CALLFOR 2ridSTAGE HEAT(HIGHHEAT) FROM I GAS VALVE DE-ENERGIZED. INDOOR BLOWER DE-ENERGIZED, (See top of previous page.) COMBUSTION AIR INDUCER ON FOR 2.5 MINUTES, PRESSURESW,TC c 2ridSTAGEON DELAY ON CONTROLBOARD THERMOSTAT COMPLETE (B, 12 OR 15 MIN :_ _o PRESSURE SWITCH WATCHGUARD COMBUSTION AIR INDUCER DE-ENERGIZED.
COOLINGSEQUENCEOF OPERATION NORMAL I I COOLING MODE POWER ON ABNORMAL MODE I I IGNITION CONTROL MAIN POWER ON. I COOLING GAS VALVE OFF. COMBUSTION AIR BLOWER OFF, / INDOOR SLOWER OFF WITH NORMAL DELAY. SIGNAL CIRCUIT BOARD FAILURE AT LED. INTERRUPT MAIN POWER TO RESET CONTROL. J CONTROL IS CONTROLSELF OPERATING DIAGNOSTIC NORMALLY? CHECK. YES _1 I TURN INDUCER ON FOR 1 SECOND. I IS POLARITY REVERSED? SIGNAL HOLDS" UNTIL UNIT IS N_ I-_=-I I SIGNAL POLARITY REVERSED AT LED.
SURELIGHT CONTROL CONTINUOUS FANSEQUENCE OFOPERATION I LED: SLOW THROUGHOUT FLASH RATE REMAINS UNCHANGED SEQUENCE, MANUAL FAN SELECTION I 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 BLO RBW,TCHESTOAOB COOLSPE,D I i THERMOSTAT OPENS. COMBUSTION A]R INDUCER I THERMOSTAT OPENS. 1 I Job Name Job Location Installer Unit Model Number AND HTG ACC.
