Lennox G24-200 - Manuals

Lennox G24-200 – Manual in PDF format online.

Manuals:

Manual

Manual Lennox G24-200

Summary

Page 2 - FRONT VIEW

Page 2 G24−200 Unit Dimensions − inches (mm) 10-1/2 (267) 17 (432) 52-1/2 (1334) 53 (1346) 9 (229) Either Side 29-1/4 (743) 17 (432) 4-1/4 (108) Either Side 5-1/2(140) VENT OUTLETS GAS PIPING INLET Either Side) HEAT EXCHANGER BLOWER MOTOR ELECTRICAL INLET (Either Side) FRONT VIEW SIDE VIEW VENT OUTL...

Page 3 - G24−200 Filter Box Dimensions − inches (mm); BACK VIEW

Page 3 G24−200 Filter Box Dimensions − inches (mm) *OPTIONAL FILTER BOX BACK VIEW SIDE VIEW 32 (813) 1 (25) 4-3/4(121) 26-1/4 (667) 1 (25) 1 (25) 50-1/2 (1283) OPENING SAME BOTH SIDES 5 (127) *NOTE Return air filter box may beinstalled at back or bottom of furnace. AIR FLOW AIR FLOW 5 (127) 32 (813)...

Page 5 - G24−200 Parts Arrangement Continued

Page 5 G24−200 Parts Arrangement Continued G24−200 BLOWER SECTION WHEEL BLOWER HOUSING CUT−OFF PLATE BEARING SHAFT BLOWER PULLEY MOTOR (Drive Kit) VIBRATION ISOLATOR BASE ASSEMBLY MOTOR BASE ADJUSTMENT ARM MOTOR BASE LOCATING ROD MOTOR PULLEY (Drive Kit) DRIVE BELT (Drive Kit)

Page 6 - WARNING

Page 6 G24−200 Gas Furnace The G24−200 upflow gas furnace is for use with naturalgas only. Each G24−200 requires the installation of a separately or-dered drive kit. The available drive kits are listed in tables 10and 15. Provided in each drive kit is the following: the fur-nace’s blower motor, its ...

Page 8 - General; Product contains fiberglass wool.; CAUTION; Combustion Air Requirements

Page 8 This furnace design has not been CSA international certi-fied for installation in mobile homes, recreational vehicles,or outdoors. WARNING The blower access panel must be securely in placewhen the blower and burners are operating. Gasfumes, which could contain carbon monoxide, canbe drawn int...

Page 9 - Unconfined Space

Page 9 CAUTION Insufficient combustion air can cause headaches,nausea, dizziness or asphyxiation. It will also causeexcess water in the heat exchanger resulting in rust-ing and premature heat exchanger failure. Excessiveexposure to contaminated combustion air will resultin safety and performance rel...

Page 11 - Setting Equipment; Return Air Plenum / Filter Box Installation

Page 11 EQUIPMENT IN CONFINED SPACE ALL AIR FROM OUTSIDE (All Air Through Ventilated Attic) CHIMNEY OR GAS VENT OUTLET AIR VENTILATION LOUVERS (Each end of attic) INLET AIR (Ends 12 in. above bottom) G24−200 FURNACE NOTE−The inlet and outlet air openings shall each have afree area of at least one sq...

Page 12 - − Install the filters and the filter access door.; SIDE VIEW; BOTTOM RETURN AIR FILTER BOX INSTALLATION; FIGURE 5

Page 12 7 − Install the filters and the filter access door. ÎÎ ÎÎ ÎÎ ÎÎÎÎ ÎÎÎÎ ÎÎÎÎ SIDE VIEW AIR FLOW 2-3/4 (70) 29-1/4 (743) 27-1/4 (692) Furnace Opening 26-1/8 (664) x 50-5/8 (1286) Floor Opening 1 (25) 1 (25) 26-1/4 (667) Filter Box Opening 4-3/4 (121) BOTTOM RETURN AIR FILTER BOX INSTALLATION A...

Page 14 - FORCE; Venting

Page 14 TYPICAL MOTOR/DRIVE INSTALLATION MOTOR PULLEY MOTOR MOTOR SECURINGHARDWARE BELT TENSION ADJUSTING HARDWARE PULLEY ALIGNMENT BLOWERPULLEY MOTORPULLEY MOTOR BASE FIGURE 7 B − Blower Belt Adjustment Maximum life and wear can be obtained from belts only ifthe proper pulley alignment and belt ten...

Page 15 - IMPORTANT; COMMON VENTING USING METAL−LINED MASONRY CHIMNEY; FIGURE 9

Page 15 Venting Using a Masonry Chimney The following additional requirements apply when a linedmasonry chimney is used to vent a G24−200 furnace: Masonry chimneys used to vent Category I central fur-naces must be either tile-lined or lined with a listed metallining system or dedicated gas vent. Unl...

Page 22 - CARBON MONOXIDE POISONING HAZARD!

Page 22 Testing for Proper Venting and Sufficient Combustion Air(Non−Direct Vent Applications Only) WARNING CARBON MONOXIDE POISONING HAZARD! Failure to follow the steps outlined below for eachappliance connected to the venting system beingplaced into operation could result in carbon monox-ide poiso...

Page 23 - for appliances

Page 23 FIGURE 11 VENT TERMINATION CLEARANCES FOR INSTALLATIONS IN THE USA AND CANADA* A − Clearance above grade − 12 in. (305mm) minimum. B − Clearance to window or door − for vent installations in USA − 48 in. (1219mm) minimum horizontal and below, 12 in. (305mm) minimum above. for vent installati...

Page 25 - Gas Piping; Left-Side Installation −; RIGHT SIDE GAS LINE INSTALLATION; (See item # 1 on previous page for installation instructions)

Page 25 Gas Piping NOTE − The flexible connector supplied with the unitmust not be modified and must be installed betweenthe two combination gas controls. 1 − Piping can be installed to enter either side of cabinet. Refer to figure 13 . Left-Side Installation − Install flexible connector (supplied w...

Page 26 - Leak Check; FIRE OR EXPLOSION HAZARD

Page 26 TABLE 9 GAS PIPE CAPACITY − FT 3 /HR (KL/HR) Nominal Internal Length of Pipe - Feet (m) Nominal Iron Pipe Size Inches(mm) Internal Diameter Inches(mm) 10 (3.048) 20 (6.096) 30 (9.144) 40 (12.192) 50 (15.240) 60 (18.288) 70 (21.336) 80 (24.384) 90 (27.432) 100 (30.480) 1/4 (6.35) .364 (9.246)...

Page 27 - Electrical; DRIVE KIT TRANSFORMER VOLTAGES AND PART NUMBERS

Page 27 Electrical CAUTION Electrostatic discharge can affect electronic com-ponents. Take precautions during furnace installa-tion and service to protect the furnace’s electroniccontrols. Precautions will help to avoid control ex-posure to electrostatic discharge by putting the fur-nace, the contro...

Page 31 - SCHEMATIC WIRING DIAGRAM FOR G24−200 UNITS (120V SINGLE PHASE 60HZ )

Page 31 SCHEMATIC WIRING DIAGRAM FOR G24−200 UNITS (120V SINGLE PHASE 60HZ ) FIGURE 18

Page 32 - WIRING SCHEMATIC DIAGRAM FOR G24−200

Page 32 WIRING SCHEMATIC DIAGRAM FOR G24−200 P UNITS − 208/230V 1PH 60 HZ G UNITS − 460V 3PH 60HZ Y UNITS − 208/230V 3PH 60HZ J UNITS − 575V 3PH 60HZ FIGURE 19

Page 33 - Unit Start−Up; SMOKE POTENTIAL

Page 33 Unit Start−Up FOR YOUR SAFETY READ BEFORE LIGHTING WARNING Do not use this furnace if any part has been underwater. A flood−damaged furnace is extremely dan-gerous. Attempts to use the furnace can result infire or explosion. A qualified service agencyshould be contacted to inspect the furnac...

Page 34 - Heating Sequence of Operation

Page 34 12 − If the furnace does not light the first time (the gas line may not be fully purged), it will attempt up to two moreignitions before locking out. 13 − If lockout occurs, repeat steps 1 through 10. 14 − If the appliance will not operate, follow the instructions Turning Off Gas To Unit"...

Page 35 - Gas Pressure Adjustment; corrections in altitudes above 2000 ft.; High Altitude Information

Page 35 Gas Pressure Adjustment Gas Flow (Approximate) 1− Operate unit at least 15 minutes before checking gas flow. Determine the time in seconds for two revolu- tions of gas through the meter. (Two revolutions as-sures a more accurate time.) A portable LP gas meter(17Y44) is available for LP appli...

Page 37 - Setting blower CFM; Blower RPM adjustment is accomplished by

Page 37 Setting blower CFM Note − Turn electrical power off when adjusting mo-tor pulley. Blower RPM adjustment is accomplished by changing the motor pulley opening. Loosen Allen screwand turn pulley clockwise to increase RPM or turn coun-terclockwise to decrease. Re-tighten Allen screw. (SeeBlower ...

Page 40 - Troubleshooting; HEATING SEQUENCE OF OPERATION WITH TWO-STAGE THERMOSTAT; NORMAL HEATING MODE

Page 40 Troubleshooting HEATING SEQUENCE OF OPERATION WITH TWO-STAGE THERMOSTAT NORMAL HEATING MODE ABNORMAL HEATING MODE YES YES POWER ON IS THE S47 (S69) ROLLOUT SWITCH CLOSED? B6 (B15) COMBUSTION AIR BLOWER PREPURGE FOR 30 SECS. DETERMINE WHY AUTOMATIC-RESET S10 (S99) HIGH LIMIT OPEN. YES NO NO 8...

Page 41 - LED CODES

Page 41 HEATING SEQUENCE OF OPERATION WITH TWO-STAGE THERMOSTAT CONTINUED NORMAL HEATING MODE ABNORMAL HEATING MODE YES HAS ROOM AIR TEMPERATURE CONTINUED TO DROP BELOW THE THERMOSTAT"S W2 SET POINT? DETERMINE WHY AUTOMATIC-RESET S10 (S99) HIGH LIMIT OPEN. K20, (K123), K36 RELAYS MAINTAIN BLOWER...

Page 42 - HEATING SEQUENCE OF OPERATION WITH SINGLE-STAGE THERMOSTAT

Page 42 HEATING SEQUENCE OF OPERATION WITH SINGLE-STAGE THERMOSTAT NORMAL HEATING MODE ABNORMAL HEATING MODE YES YES POWER ON IS THE S47 (S69) ROLLOUT SWITCH CLOSED? B6 (B15) COMBUSTION AIR BLOWER PREPURGE FOR 30 SECS. DETERMINE WHY AUTOMATIC-RESET S10 (S99) HIGH LIMIT OPEN. YES NO NO 8 SEC TRIAL FO...

Page 44 - FOR TWO CONDENSING UNITS; MANUAL FAN OPERATION

Page 44 THERMOSTAT CALLS FOR COOLING (Y1 POWERED) COOLING CONTACTOR OF FIRST-STAGE CONDENSING UNIT CLOSES AND SYSTEM BLOWERS START. YES HAS ROOM AIR TEMPERATURE CONTINUED TO RISE ABOVE THE THERMOSTAT"S Y2 SET POINT? COOLING CONTACTOR OF SECOND-STAGE CONDENSING UNIT CLOSES. IS Y2 DEMAND SATISFIED...