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LENNOX
_2001 Lennox Industt]e-_ _nc
Dallas Texas USA
INSTALLATION
INSTRUCTIONS
G32Q SERIES
UNITS
GAS UNITS
504,488M
_[_2ech
nical
11/2001
blications
Supersedes504,382M
Litho U.S.A.
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
ITahi6 of_ _ _te:nts
i
::
Unit Dimensions ................................
2
G32Q Parts Arrangement
.......................
3
Requirements ..................................
4
General .......................................
5
Installation - Setting Equipment
..................
5
Return Air Opening Guidelines ...................
5
Filters & Optional Filter Assembly .................
6
Duct System ...................................
7
Pipe & Fittings Specifications ....................
7
Vent Piping L_uidelines..........................
8
Joint Cementing Procedure ......................
8
Venting Practices ...............................
9
Gas Piping ...................................
15
Electrical .....................................
16
Unit Start-Up .................................
21
Heating Sequence of Operation .................
22
Blower Operation ..............................
22
Gas Pressure Adjustment ......................
22
High Altitude Information .......................
23
Other Unit Adjustments ........................
23
Service ......................................
24
Repair Parts ..................................
27
Troubleshooting ...............................
27
Start-Up & Performance Checklist .
32
-AWARNING
Do not store or use gasoline or other
flammable vapors and liquids in the vi-
cinity of this or any other appliance.
Installation
and service
must
be per-
formed
by a qualified
installer,
service
agency
or the gas supplier,
WHAT TO DO IF YOU SMELL GAS:
• Do not by to light any appliance.
• Extinguish any open flames.
• Do not touch any electrical switch; do not use
any phone in your building.
• Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
• If you cannot reach your gas supplier, call the
fire department.
11101
504,488M
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Table of Contents
Related Manuals for Lennox G32Q4-100
Summary of Contents for Lennox G32Q4-100
- Page 1 LENNOX _2001 Lennox Industt]e-_ _nc Dallas Texas USA RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE Do not store or use gasoline or other flammable vapors and liquids in the vi- cinity of this or any other appliance. Installation and service must formed by a qualified installer,...
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Page 2: Side View
1 1116 3 5/8 1 1116 (41) ,o-oI (16)'-IP • TOP VIEW "ql'-- 28 1/2 (724) ELECTRICA INLETS_ {BothSides) _____(Either Side) J Lt:;:"ZtJ Return Air Knockout (Bottom) SIDE VIEW Model No. I mm G32Q3-75 16-1/4 14.1/8 G32Q3/4-100 G32(_4/5-100 21-1/4 19-1/8 G32Q4/5-125 26-1/4 24-1/8... - Page 3 GLASS FIBER GASKET FRESH AIR INTAKE FITTING BURNERBOX ASSEMBLY PATCH RESSURE-. FLAME SIGHT p swrrcH GLASS HIGH HEAT BURNER BOX COVER ]3NO-STAGE PRESSURE GAS VALVE AND SWITCH MANIFOLD (-75 only) BURNER ACCESS PANEL ORIFICE BLOWER ACCESS z-/" DOOR COLD HEADER (COLLECTOR) TWO-SPEED COMBUSTION AIR...
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Page 4: Requirements
National Fuel Gas Code or CAN/CGA B149.1 and B149.2 standards. When the furnace is used with cooling units, it shall be installed in parallel with, or on the upstream side of. cool- certified ing units to avoid condensation ment. -
Page 5: General
The G32Q is an upflow gas furnace. is necessary if the furnace is to be used with L.P. gas,... - Page 6 For installations where the return air is taken fl'oma retum air drop, unitmay be installed with mtum air entl_ through either the left or right side of the furnace. For side returnair applications,cut furnace cabinetat the dimensionsgiven on page 2. Embossedcomers are pro- vided on bothcabinet sidesfor returnair opening location.
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Page 7: Duct System
FIGURE 6 4 - Positionfilter 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. - Page 8 TABLE 3 TERMINATION KITS Lennox Part Kit LB# Description*Inches 60G77 LB-49107CE 3" (50,8) Low Pressure 33K97 LB-87942 15F75 LB-49107CC 22G44 LB-49107CD Assembly 15F74 LB_9107CB 44J41 LB-65678A 44J40 LB-65701A Assembly TerminationKit 30G28 Termination ExtendedVent 30G79 WTKX Termination ExtensionRiser When making ABS joints, pieces can be prepared with a cleaner.
- Page 9 Without the heat of the original furnace flue products, the existing vent pipe is probably oversized for the single water heater or other appliance.
- Page 10 Zl, CAUTION CAUTION Removal of Unit from Common Venting System In the event that an existing furnace is removed from a venting system commonly run with separate gas ap- pliances, the venting system may be too largeto property vent the remaining attached appliances. The following...
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Page 11: Top View
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 through... - Page 12 Page 12 areas or other recessed areas. Do not ends directly below roof eaves Since the G32 is a certified di- iV gas furnace, the location is limited by local building codes. In of the Natural Gas vented, minimum clearance from electric meters, gas meters, regula- is 4 feet (1.2 m) for US...
- Page 13 LB-49107CD for 2(51) Venting (44J40) LB-65701A for 3(76) Venting FIGURE METALOR PLASTIC STRAPPING FIGURE 13 - When furnace is installed in a residence period of time, shut down for an extended vacation home, make provisions for draining trap densate collection and lines.
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Page 14: Joint Cementing Procedure
Inches (mm) _, EXHAUST I '10" NOTE - Enclosed ex_us_ pipe _s Front View insuleted w;th _F2 i,_Ch(13 ram) INTAKE foam insu_abon If in_al(ear_ ex- VENT hsusl I_pes am reversed, sl=land r_move vent mr=st be teat)ply to OUmr vent Exhaust Side View iNTAKE VENT... - Page 15 24. 2- When connecting the gas supply, factors such as length of run, number of fittings and furnace rating must be considered to avoid excessive pressure drop. Table 5 lists recommended pipe sizes for typi- cal applications.
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Page 16: Gas Pipe Capacity
Nominal Internal Iron Pipe Size Diameter -InchesImm) .InchesImm) (3.048) (635) (9 246) (1 13) (6,53) (12.5221 (269) (127) (17.799) (496) .824 (19.05) (20.930) (10.19) 1 049 (254) (26.645) (19,25) 1-1/4 1.380 1400 (31.75) (35.052) (39.64) Io1/2 1.610 21 O0 (381) (40.894) (59.46) 2.0_7... - Page 17 Wl terminal 9- Install room thermostat according to instructions provided with thermostat. See figure 28 for thermo- stat designations. If furnace is being used with heat pump refer to FM21 installation instruction. NOTE - W2 thermostat connection (pigtail) must be made at two-speed control board.
- Page 18 G32Q CONTROL DOOR INTERLOCK SWITCH ._,_ C=RCU_ TRANSFORMER '_1_ _BREA_ER SURELIGHT CONTROL TWO_TAGE _'--'-CONTROL FIGURE 29 SURELIGHT INTEGRATED CONTROL BOARD "_-III 0110 UIIO HOT :_(_ ÷ _.._, .. ÷ L_____J FANDELAY SFJ_-_E _.__ _--.-J ® ® Y G W R C Y Q W R BOARD TERMINAL DESIGNATION_...
- Page 19 G32Q TWO-STAGE CONTROL BOARD MODE OF OPERATION JUMPER (Factory at TWO STAGE) W2 TIMED ON DELAY JUMPER (Factoryset at 8 minutes.) FIGURE 31 TYPICAL G32Q FIELD WIRING DIAGRAM FIGURE 32 Page 19...
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Page 20: Wiring Diagram
TYPICAL G32Q SCHEMATIC F20M /_C 4.5 E]_(4 IJ_D] LIMIT Ll'_b_m r---n 2 I I I IIilll --_' WIRING DIAGRAM HION NEAT srj Ti_ SI]_ c_urr AiR Lml_ (ill FIGURE 33 Page 20... - Page 21 1 - STOPf Read the safety informationat the beginning of this section. 2 - Set thermostat to lowest setting, 3 - Turn off all electrical power to furnace, 4- This furnace is equipped with an ignition device which automatically lights the burner, Do not try to light the burner by hand.
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Page 22: Gas Pressure Adjustment
4 - If the selected "W2 ON" delay ends and the demand for heat is still not satisfied, the two-stage control switches the furnace to secondstage operation(high heat). In second stage operation, the following oc- cur: combustion air inducer motor is energized at high speed;... - Page 23 Model No. 0 to 4500 ft. (0 to 1372 m) above sea level G32-75 natura_ G32-100 natural 3.5 (0.87) G32-125 natural G32-75 L.P G32-100 L,P. 7.5 (1.90) G32-125 L,P. 7.5 11.90) Manifold Pressure Measurement & Adjustment NOTE - Pressure test adaptor kit (10L34) from Lennox to facilitate...
- Page 24 Electrical 1 - Check all wiringfor loose connections. 2 - Check circuit breaker located on unit controlbox. 3 - Check for the correct voltage at the furnace (furnace operating). 4 - Check amp-draw on the blower motor. Motor Nameplate NOTE - Do not secure electrical conduit directly to duct- ing or structure.
- Page 25 1 while you disas- semble the furnace. Place papers or protective covering in front of the furnace while you remove the heat exchang- er assembly. 1 - Turn off electrical and gas power supplies to fumaea.
- Page 26 Cleaning the Bumer Assembly 1 - Turn off electrical and gas power supplies to furnace. Remove upper and lower furnace access panels. 2 - Disconnect the gas supply line to gas valve. Depend-...
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Page 27: Repair Parts
The following repair parts are available through independent furnace model number listed on the unit rating plate. Example: CABINET PARTS Cabinet Blower panel Upper access panel CONTROL PANEL PARTS Two-Stage control board Surelight integrated control board Transformer Circuit breaker Door interlock switch... -
Page 28: Heating Sequence
NORMAL HEATING POWER ON CONTROL SELF-CHECK OKAY? COMBUSTION AIR iNDUCER ON FOR 1 SECOND. I POLARITY OKAY? YES _ ROLLOUT SWITCH CLOSED? BURNER OFF? (CONTINUOUS FLAME CHECK) YES _ NORMAL OPERATION: LED #1 -- SIMULTANEOUS SLOW FLASH LED #2 - SIMULTANEOUS SLOW FLASH THERMOSTAT CALLS FOR HEAT: LED #1 -- FAST FLASH LED #2 - FAST FLASH... -
Page 29: Continued On Next Page
HEATING SEQUENCE CONTINUED NORMAL HEATING 15 SECONDS PREPURGE IGNITION SEQUENCE BEGINS (Ignition tfiatcounter initiated.) IGNITOR WARM-UP (20 SECONDS) J-lr "_- TWO-STAGE MODE | I WE TIMED M ODE CALLFOR Ist STAGEHEAT j L SINGLE STAGET'STAT j L MAIN GAS VALVE MAIN GAS VALVE OPEN... - Page 30 HEATING SEQUENCE CONTINUED NORMAL H EATING M ODE PRESSURESWtTCHCLOSED? L'WO'STAGE'OOE S,N";L;'S_;_%T CALLFOR 2ridSTAGE 2ridSTAGEON DELAY HEAT(HIGHHEAT) ON CONTROLBOARD FROM THERMOSTAT COMPLETE (B, 12 OR 15 MIN INDOOR BLOWER ON HIGH HEATING SPEED? COMBUSTION AIR BLOWER ON HIGH SPEED? HIGH HEAT PRESSURE SWITCH CLOSED? YES _ HIGH HEAT GAS VALVE OPEN? (8 SEC.
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Page 31: Cooling Sequence Of Operation
COOLING SEQUENCE OF OPERATION NORMAL COOLING POWER ON IGNITION CONTROL MAIN POWER ON. CONTROL SELF DIAGNOSTIC CHECK. IS CONTROL OPERATING NORMALLY? YES _1 TURN INDUCER ON FOR 1 SECOND. IS POLARITY REVERSED? SIGNAL HOLDS" PRo/SE THERo E I-_=-I UNTIL UNIT IS UND._ GPRRoOuPNEDRELY"... - Page 32 Blower Motor Amps Blower Motor HorsepowedkW Blower Motor LubricationOK?[] Gas PipingConnectionsTight & Leaks Tested?• Fuel Type: Natural Gas? [] Furnace Btu (kW) Input. Line Pressure Regulator Pressure w.c./Pa - Nat, Air Shutters Propedy Adjusted (If Installed)?• Connections "right?[] Proper Draft?