Lennox G32V3-75, G32V5-100, G32V5-125 Installation Instructions Manual

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Page 1



INSTALLATION

 2002 Lennox Industries Inc.

Dallas, Texas, USA

RETAIN THESE INSTRUCTIONS

FOR FUTURE REFERENCE

INSTRUCTIONS

G32V SERIES UNITS

GAS UNITS

504,564M 5/2002

Supersedes 504,468M

Table of Contents

G32V Unit Dimensions- inches (mm) 2. . . . . . . . . . . .

G32V Parts Arrangement 3. . . . . . . . . . . . . . . . . . . . . .

Safety Instructions 4. . . . . . . . . . . . . . . . . . . . . . . . . . . .

General 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation - Setting Equipment 5. . . . . . . . . . . . . . . .

Return Air Opening Guidelines 5. . . . . . . . . . . . . . . . .

Filter & Filter Assembly 6. . . . . . . . . . . . . . . . . . . . . . .

Duct System 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pipe & Fittings Specifications 7. . . . . . . . . . . . . . . . . .

Vent Piping Guidelines 8. . . . . . . . . . . . . . . . . . . . . . . .

Joint Cementing Procedure 9. . . . . . . . . . . . . . . . . . . .

Venting Practices 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gas Piping 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Integrated Control Board Settings 23. . . . . . . . . . . . .

Unit Start-Up 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Heating Sequence of Operation 27. . . . . . . . . . . . . . .

Gas Pressure Adjustment 31. . . . . . . . . . . . . . . . . . . .

High Altitude Information 32. . . . . . . . . . . . . . . . . . . . .

Other Unit Adjustments 32. . . . . . . . . . . . . . . . . . . . . .

Service 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Repair Parts List 35. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Integrated Control Board Diagnostic Codes 35. . . . .

Troubleshooting 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Start-Up & Performance Check List 42. . . . . . . . . . . .

Litho U.S.A.

Do not store or use gasoline or other flamĆ mable vapors and liquids in the vicinity of this or any other appliance.

Installation and service must be performed by a qualified installer, service agency or the gas supplier.

05/02

*2P0502*

WARNING

If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or death.

WHAT TO DO IF YOU SMELL GAS:

 Do not try to light any appliance.  Extinguish any open flames.  Do not touch any electrical switch; do not use any

phone in your building.

 Leave the building immediately.  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.

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504,564M

*P504564M*

Page 2

G32V Unit Dimensions - inches (mm)

1 1/16

(41)

5/8

(16)

1 1/16

(41)

18 7/8

(479)

SUPPLY

AIR

OPENING

23 3/4 (603)

25 (635)

TOP VIEW

28 1/2

(724)

CONDENSATE

DRAIN

(Both Sides)

ELECTRICAL

INLETS

(Both Sides)

3 5/8

(92)

7 3/8 (187)

(51)

2 1/2 (64)

21 3/4

(552)

4 1/2 (114)

GAS PIPING

(Both Sides)

COMBUSTION

EXHAUST

AIR OUTLET

(584)

INLET

AIR INTAKE

(1168)

EXTERNAL

SIDE RETURN

AIR FILTER KIT

(Either Side)

(Optional)

23 (584)

RETURN AIR

KNOCKOUT (Either Side)

1-15/16 (49)

23 (584)

Return Air

Knockout (Bottom)

4 (102)

5/8 (16)

AIR FLOW

Return Air

Knockout (Bottom)

FRONT VIEWSIDE VIEW

Model No.

G32V3-75 16-1/4 413 14-1/8 359 12 305 12 305 2-1/8 54 7-5/8 194 14 356 12-3/4 324 G32V5–100 21-1/4 540 19-1/8 486 18 457 18 457 1-5/8 41 10-1/8 257 20 508 18-3/4 476 G32V5–125 26-1/4 667 24-1/8 613 18 457 18 457 4-1/8 105 12-5/8 321 20 508 18-3/4 476

A B C D E F G H

in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm

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G32V Parts Arrangement

FRESH AIR

INTAKE FITTING

BURNER BOX

ASSEMBLY

PATCH

PLATE

FLAME SIGHT

BURNER BOX

COVER

GLASS

TWOĆSTAGE

GAS VALVE AND

MANIFOLD

GLASS FIBER GASKET

LOW HEAT

DIFFERENTIAL

PRESSURE

SWITCH

HIGH HEAT

DIFFERENTIAL

PRESSURE

SWITCH

(-75 only)

WARM

HEADER

(COLLECTOR)

BOX

PATCH PLATE WITH

BARBED FITTING

AND FLAME

ROLL-OUT SWITCH

DuralokPlus

HEAT EXCHANGER

ASSEMBLY

FLUE COLLAR

TRANSITION

TOP CAP

CABINET

FLUE

SUPPLY

AIR

BLOWER

BURNER ACCESS

PANEL

BLOWER

ACCESS

DOOR

TWO-SPEED

COMBUSTION AIR

INDUCER

COMBUSTION

AIR

ORIFICE

COLD HEADER

(COLLECTOR)

BOX

SECONDARY COIL

PRIMARY LIMIT

(ALTERNATE STYLES)

TRANSFORMER

CONTROL VOLTAGE

CIRCUIT BREAKER

SURELIGHT TWO-STAGE,

VARIABLE-SPEED

INTEGRATED CONTROL BOARD

DOOR INTERLOCK SWITCH

FIGURE 1

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Safety Instructions

To combustible

Lennox G32V units are Category IV 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 curĆ rent National Fuel Gas Code (ANSI-Z223.1/NFPA 54) in the United States. The National Fuel Gas Code is availĆ able from the following address:

American National Standards Institute, Inc. 11 West 42nd Street New York, NY 10036

In Canada, installation must conform with current NationĆ al Standard of Canada CAN/CGAĆB149.1 Installation Code for Natural Gas Burning Appliances and EquipĆ ment" and CAN/CGA-B149.2 Installation Code for ProĆ pane Gas Burning Appliances and Equipment," local plumbing or waste water codes and other applicable local codes.

This furnace is CSA International certified for installation clearances to combustible material as listed on the unit rating plate and in table 1.

TABLE 1

Clearances Location Inches (mm)

Front 24 (610)

Service access

To combustible

materials

Condensate side

To p 1 (25)

Exhaust 0

Side, rear, and front 0

3 (76)

(from side of unit)

When the furnace is used with cooling units, it shall be installed in parallel with, or on the upstream side of, cooling units to avoid condensation in the heating compartĆ ment. With a parallel flow arrangement, a damper (or othĆ er means to control the flow of air) must adequately prevent chilled air from entering the furnace. If the dampĆ er is manually operated, it must be equipped to prevent operation of either the heating or the cooling unit, unless it is in the full HEAT" or COOL" setting.

When installed, the furnace must be electrically grounded according to local codes. In addition, in the United States, installation must conform with the current National ElecĆ tric Code, ANSI/NFPA No. 70. The National Electric Code (ANSI/NFPA No. 70) is available from the following adĆ dress:

National Fire Protection Association 1 Battery March Park Quincy, MA 02269

In Canada, all electrical wiring and grounding for the unit must be installed according to the current regulations of the Canadian Electrical Code Part I (CSA Standard C22.1) and/or local codes.

Field wiring connections must meet or exceed specificaĆ tions of type T wire and withstand a maximum temperaĆ ture rise of 180°F (82°C).

G32V unit must be installed so that electrical components are protected from water. When the furnace is installed so that supply ducts carry

air circulated by the furnace to areas outside of the space containing the furnace, return air shall be handled by a duct(s) sealed to the furnace casing and terminating outĆ side space containing furnace.

Floor 0

NOTE - For installation on combustible floors, the furnace shall not be installed directly on carpeting, tile, or other combustible material other than wood flooring.

Accessibility and service clearances must take preceĆ dence over fire protection clearances.

For installation in a residential garage, the furnace must be installed so that the burner(s) and the ignition source are located no less than 18 inches (457 mm) above the floor. The furnace must be located or protected to avoid physical damage by vehicles. When a furnace is installed in a public garage, hangar, or other building that has a hazardous atmosphere, the furnace must be installed acĆ cording to recommended good practice requirements and current National Fuel Gas Code or CAN/CGA B149.1 and B149.2 standards.

WARNING

Product contains fiberglass wool.

Disturbing the insulation in this product during installation, maintenance, or repair will expose you to fiberglass wool dust. Breathing this may cause lung cancer. (Fiberglass wool is known to the State of California to cause cancer.)

Fiberglass wool may also cause respiratory, skin, and eye irritation.

To reduce exposure to this substance or for further information, consult material safety data sheets available from address shown below, or contact your supervisor.

Lennox Industries Inc.

P.O. Box 799900 Dallas, TX 75379-9900

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NOTE - G32V series units must not be used as a construction heater during any phase of construction. Very low return air temperatures, harmful vapors and misĆ placement of the filters will damage the unit and lower its efficiency.

The G32V furnace may be installed in alcoves, closĆ ets, attics, basements, garages and utility rooms in the upflow position.

General

The G32V is an upflow gas furnace which is factoryequipped for use with natural gas. 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 local codes in any way. Consult authorities having jurisdiction before installation.

Shipping and Packing List

1 - Assembled G32V furnace

1 - 3 inch x 2 inch vent transition piece (-100, -125

units only)

1 - Bag assembly containing:

1 - Filter 1 - External filter rack for side return air application

1 - Bag assembly containing:

1 - Electrical make-up box with cover and grounding screw 4 - Thread-forming make-up box screws 1 - Green ground wire 1 - Wiring harness 1 - Snap bushing 2 - Filter clips 1 - Condensate drain pipe adapter 1 - Condensate plug 4 - Wire nuts 2 - Lockwashers and screws 8 - Self-tapping screws 2 - Filter door pins 1 - Grounding label 1 - Wire tie

Shipping Damage

Check equipment for shipping damage. If you find any damage, immediately contact the last carrier.

WARNING

Improper installation, adjustment, alteration, serĆ vice or maintenance can cause property damage, personal injury or loss of life. Installation and serĆ vice must be performed by a qualified installer, serĆ vice agency or the gas supplier.

CAUTION

As with any mechanical equipment, personal injuĆ ry can result from contact with sharp sheet metal edges. Be careful when you handle this equipment.

Installation - Setting Equipment

Select a location that allows for required clearances listed on the unit rating plate. Also consider gas supply connecĆ tions, electrical supply, vent connection and installation and service clearances [24 inches (610 mm) at unit front]. The furnace must be level.

CAUTION

G32V unit should not be installed in areas normally subject to freezing temperatures.

Return Air Opening Guidelines

WARNING

Improper installation of unit can result in personal injury or death. Combustion and flue products must never be allowed to enter the return air sysĆ tem or air in the living space. Use sheet metal screws and joint tape to seal return air system to furnace. In platform installations with furnace return, the furnace should be sealed airtight to the return air plenu m . A doo r mu s t never be us e d as a portion of the return air duct system. The base must provide a stable support and an airtight seal to the furnace. Allow absolutely no sagging, cracks, gaps, etc. For no reason should return and supply air duct systems ever be connected to or from other heatin g devices such as a fireplace or stove, etc. Fire, explosion, carbon monoxide poisoning, personal injury and/or property damage could result.

WARNING

The blower access panel must be securely in place when the blower and burners are operating. Gas fumes, which could contain carbon monoxide, can be drawn into living space resulting in personal inĆ jury or death.

Return air can be brought in either side or at the bottom of the unit. Scribe lines show the outline of each side and the bottom return air opening.

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Bottom Return Air Applications

If return air is to terminate through the floor under the furĆ 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

FIGURE 2

BOTTOM RETURN AIR APPLICATION

FILTER SIZE REQUIREMENTS

TABLE 2

UNIT MODEL

NUMBER

G32V-75 31J81

G32V-100 G32V-125

FILTER PART

NUMBER

P-8-7831

FILTER SIZE

14 inches x 25 inches

(356 x 635 mm)

20 inches x 25 inches

(508 x 635 mm)

Bottom 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.

BOTTOM RETURN FILTER INSTALLATION

REAR FILTER CLIP

FURNACE

SIDE FILTER CLIPS (2)

RETURN AIR OPENING

BACK

G32V UNIT

RETURN AIR

PLENUM

PROPERLY

SIZED FLOOR

OPENING

FIGURE 3

2 - Bend a flange on return air plenum and lower into

floor or platform opening. See figure 3.

3 - Position unit over return air opening. Seal unit air

tight with return air plenum.

NOTE - Be careful not to damage insulation. Check for tight seal.

Side Return Air Applications

For installations where the return air is taken from a return air drop, unit may be installed using either the left or right side of furnace.

For side return air applications, cut the furnace cabinet at the dimensions given in the unit dimensions graphic. EmĆ bossed corners are pro-vided on both cabinet sides for reĆ turn air opening location.

FURNACE

FRONT

FURNACE

BASE BOTTOM

FIGURE 4

3 - Place filter in bottom of blower compartment beneath

rear filter clip. Press down on filter sides. Filter clips flex allowing filter to snap into place.

4 - To remove filter, press clip and pull filter up and out.

Side Return Air Applications

1 - Align filter rack opening with the inside edge of the

side return opening. Bottom of rack should be approximately 1 inch (25 mm) from the bottom and 3 inches (76 mm) from the front of the unit.

2 - Screw filter rack into place with the eight self drill, self

tap screws provided. See figure 5.

3 - Push filter door pins through the two holes in filter

door from the inside of the uĆchannel. See figure 6.

SIDE RETURN FILTER INSTALLATION

in. (mm)

BLOWER DECK

RETURN AIR

RETURN

AIR

OPENING

12 in. (305) for

14 in. (356) Filter

18 in. (457) for

20 in. (508) Filter

PLENUM SIZE

12-3/4 in X 23-1/2 in (324 X

597) for 14 in (356) Filter 18-3/4 in. x 23-1/2 in.

(476 x 597)

for 20 in. (508) Filter

Filter & Filter Assembly

A filter and an external filter rack for use in side return air applications are shipped with the unit. A filter must be in place anytime the unit is in operation.

Page 6

1-15/16 in.

(49)

CABINET BASE BOTTOM

FIGURE 5

15/16 in

(24)

Page 7

4 - Position filter door on end of filter 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 filter rack until secure.

6 - To remove filter, pull filter door pins until door is re-

leased from filter rack.

FILTER DOOR ASSEMBLY

FILTER DOOR

TAB

FILTER

NO TE - For bot to m re tu r n air, ret ur n ai r du ct should be seĆ cured to the unit using rivets or S-locks. For side return air, secure return air duct to filter rack using screws. When using screws, take care to avoid interference with the filĆ ter which may cause improper filtration.

The ret urn ai r mu s t no t be draw n fro m a room where another gas appliance (ie., a water heater) is installed. Even though this furnace draws its combusĆ

tion air from outside of the structure, other gas apĆ pliances that share a utility room may not. When return air is drawn from a room, a negative pressure is created in the room. If 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.

FILTER DOOR

TAB

FIGURE 6

Duct System

Use industry-approved standards to size and install the supply and return air duct system. This will result in a quiet and low-static system that has uniform air distribution. If the G32V unit is being installed as a replacement for an existing furnace, the existing supply and return air duct system should be evaluated to make sure that it is approĆ priately sized.

The total external static pressure (ESP) should not exĆ ceed 0.8" w.c. The ESP calculation should include presĆ sure losses caused by electronic air cleaners, filters, cooling coils, the duct system, registers and grilles. A properly sized duct system will help to optimize efficiency and reliability and to minimize sound levels. Operation of a G32V unit outside of its specified static pressure range will result in poor performance and will reduce the useful life-expectancy of the product and its components.

Supply Air Plenum

Furnaces installed without a cooling coil require the installaĆ tion of a removable access panel in the supply air duct. The access panel should be large enough to permit inspection (either by smoke or reflected light) of the heat exchanger for leaks after installation. The furnace access panel must alĆ ways be in place when the furnace is operating and it must not allow leaks into the supply air duct system.

Return Air Plenum

See dimension illustration for proper return air duct size.

Pipe & Fittings Specifications

All pipe, fittings, primer and solvent cement must conform with American National Standard Institute and the AmeriĆ can Society for Testing and Materials (ANSI/ASTM) stanĆ dards. The solvent shall be free flowing and contain no lumps, undissolved particles or any foreign matter that adversely affects the joint strength or chemical resistance of the cement. The cement shall show no gelation, stratifiĆ cation, or separation that cannot be removed by stirring. Refer to table 3 for approved piping and fitting materials.

Primers and solvents must meet ASTM specifications. PVC primer is specified in ASTM F 656. Use PVC solvent cement as specified in ASTM D 2564 and ABS solvent cement as specified in ASTM D 2235. Low temperature solvent cement is recommended. Metal or plastic strapĆ ping may be used for vent pipe hangers.

Table 4 lists the available exhaust termination kits. All Lennox vent terminations are PVC.

TABLE 3

PIPING AND FITTINGS SPECIFICATIONS

PIPE & FITTING MATERIAL

Schedule 40 PVC (Pipe) D1785

Schedule 40 PVC (Cellular Core Pipe) F891

Schedule 40 PVC (Fittings) D2466

Schedule 40 CPVC (Pipe) F441

Schedule 40 CPVC (Fittings) F438

SDR-21 PVC (Pipe) or SDR-26 PVC (Pipe) D2241

SDR-21 CPVC (Pipe) or SDR-26 CPVC (Pipe) F442

Schedule 40 ABS (Pipe) D1527

Schedule 40 ABS (Fittings) D2468

ABS-DWV (Drain Waste & Vent) (Pipe & Fittings)

PVC-DWV (Drain Waste & Vent Pipe & Fittings)

ASTM

SPECIFICATION

D2661

D2665

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TABLE 4

TERMINATION KITS

Lennox Part

No.

60G77 LB-49107CE

33K97 LB-87942

15F75 LB-49107CC

22G44 LB-49107CD

15F74 LB-49107CB 2" (50.8) Wall Ring Kit

44J41 LB-65678A

44J40 LB-65701A

30G28 WTK

30G79 WTKX

Kit LB# Description-Inches (mm)

1-1/2" (50.8) Concentric

Termination Kit

3" (50.8) Low Pressure Drop ConĆ

centric Term. Kit

2" (50.8) Roof

Termination Kit

2" (50.8) Wall

Assembly Termination Kit

3" (76.2) Roof Termination Kit

3" (76.2) Wall

Assembly Termination Kit

2" (50.8) Wall

Termination Extended Vent

2" (50.8) Wall

Termination Extension Riser

CAUTION

Solvent cements for plastic pipe are flammable liqĆ uids and should be kept away from all sources of ignition. Do not use excessive amounts of solvent cement when making joints. Good ventilation should be maintained to reduce fire hazard and to minimize breathing of solvent vapors. Avoid conĆ tact of cement with skin and eyes.

When making ABS joints, pieces can be prepared with a cleaner. When joining ABS to PVC materials, use PVC solvent cement. Refer to this procedure as specified in ASTM D3138.

Vent Piping Guidelines

Pipe used for exhaust and intake lines should be sized acĆ cording to table 5. Note that maximum length of vent pipe is for one run; either intake or exhaust. Maximum vent length given is not the total length of intake plus exhaust vents.

Each 90° elbow is equivalent to 5 feet (1.52 m) of vent

pipe. Two 45° elbows are equivalent to one 90° elbow. One 45° elbow is equal to 2.5 feet (.76 m) of vent pipe. If intake and exhaust piping runs are not equal in length and number of elbows, the larger diameter pipe must be used for both runs.

TABLE 5

VENT PIPE SIZING TABLE FOR G32V FURNACES

MINIMUM DIAMETER OF INTAKE/EXHAUST PIPE

Vent Pipe

Equivalent Length

Max. Feet (Meters)

15 (4.57) 2" 2" 2" 20 (6.10) 2" 2" 3"

25 (7.62) 2" 2" 3"

30 (9.14) 2" 3" 3"

40 (12.19) 2" 3" 3"

50 (15.24) 2" 3" 3"

55 (16.76) 2" 3" 3"

60 (18.29) 3" 3" 3"

70 (21.34) 3" 3" 3"

80 (24.38) 3" 3" 3"

90 (27.43) 3" 3" 3"

100 (30.48) 3" 3" 3"

110 (33.53) 3" 3" 3"

120 (36.58) 3" 3" 3"

130 (39.62) 3" 3" --

NOTE - Minimum vent pipe for G32V-75, G32V-100, and G32V-125 is 5 feet with 2 elbows of 2-inch diameter pipe.

G32V-75

75,000

BTU

G32V-100

100,000

BTU

G32V-125

125,000

BTU

NOTE - When you install a WTKX termination kit as part of the intake and exhaust piping, the two 2-inch diameter 90° elbows and the 27 inch pipe (in the kit) should be inĆ cluded in the maximum vent pipe length for each run.

For 75 kBtuh units, connections are provided for 2-inch

diameter vent pipe which should satisfy most venting reĆ quirements. No transition pieces are provided or needed for use with 2-inch vent pipe.

For -100 and -125 kBtuh units, the intake connection is sized for 3-inch diameter pipe. The exhaust connection ha s a 2- inc h ni pp le . A pipe transition piece is shipped with the unit for use with 3-inch pipe. See figure 7 for 2-inch and 3-inch vent pipe applications. Most venting applications will require 3-inch vent pipe for proper unit operation. The intake and exhaust pipe

must never be constructed of different diameter pipes. Regardless of the diameter of pipe used, the stanĆ

dard roof and wall terminations described in section InĆ take and Exhaust Piping Terminations should be used.

Exhaust piping must terminate with 1-1/2 inch pipe for 1-1/2 inch or 2 inch vents and 2-inch vent pipe for 3-inch vents.

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Page 9

G32V-100 OR -125 WITH 2 IN. VENTING

2 IN. VENT PIPE

2 IN. OUT

3 IN. X 2 IN.

REDUCER

3 IN.

G32V-100 OR -125 WITH 3 IN. VENTING

3 IN. X 2 IN. REDUCER

2 IN. FIELD PROVIDED

NIPPLE

2 IN. OUT

3 IN.

3 IN. FIELD PROVIDED

NIPPLE

3 IN. VENT PIPE

into socket until it bottoms out. Turn pipe 1/4 turn durĆ ing assembly (but not after pipe is fully inserted) to distribute cement evenly.

NOTE - Assembly should be completed within 20 seĆ conds after last application of cement. Hammer blows should not be used when inserting pipe.

8 - After assembly, wipe excess cement from pipe at

end of fitting socket. A properly made joint will show a bead around its entire perimeter. Any gaps may indiĆ cate a defective assembly due to insufficient solvent.

9 - Handle joints carefully until completely set.

Venting Practices

FIGURE 7

Joint Cementing Procedure

All cementing of joints should be done according to the specifications outlined in ASTM D 2855.

WARNING

DANGER OF EXPLOSION! Fumes from PVC glue may ignite during system check. Disconnect wire from pressure switch terminal before 115 volt powĆ er is applied to unit. Reconnect wire after two minĆ utes of combustion air blower operation.

1 - Measure and cut vent pipe to desired length.

2 - Debur and chamfer end of pipe, removing any ridges

or rough edges. If end is not chamfered, edge of pipe may remove cement from fitting socket and result in a leaking joint.

3 - Clean and dry surfaces to be joined.

4 - Test fit joint and mark depth of fitting on outside of

pipe.

5 - Uniformly apply liberal coat of PVC primer for PVC or

ABS cleaner for ABS to inside socket surface of fitĆ ting and male end of pipe to depth of fitting socket.

6 - Promptly apply solvent cement to end of pipe and inĆ

side socket surface of fitting. Cement should be apĆ plied lightly but uniformly to inside of socket. Take care to keep excess cement out of socket. Apply second coat to end of pipe.

NOTE - Time is critical at this stage. Do not allow primer to dry before applying cement.

7 - Immediately after applying last coat of cement to

pipe, and while both inside socket surface and end of pipe are wet with cement, forcefully insert end of pipe

WARNING

Insufficient combustion air can cause headaches, nausea, dizziness or asphyxiation. It will also cause excess water in the heat exchanger resulting in rusting and premature heat exchanger failure. Excessive exposure to contaminated combustion air will result in safety and performance related problems. Avoid exposure to the following subĆ stances in the combustion air supply:

Permanent wave solutions Chlorinated waxes and cleaners Chlorine base swimming pool chemicals Water softening chemicals De-icing salts or chemicals Carbon tetrachloride Halogen type refrigerants Cleaning solvents (such as perchloroethylene) Printing inks, paint removers, varnishes, etc. Hydrochloric acid Cements and glues Antistatic fabric softeners for clothes dryers Masonry acid washing materials

The thickness of construction through which vent/air inĆ take pipes may be installed is a minimum of 3 inches (76 mm) and a maximum of 24 inches (610 mm). If a G32V 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. Without the heat of the original furnace flue products, the existing vent pipe is probably oversized for the single water heater or other appliance. The vent should be checked for proper draw with the remaining appliance.

Intake Piping

1 - Cement intake piping in slip connector located at top

of unit.

2 - Route piping to outside of structure. Continue with

installation following instructions given in exhaust and intake piping termination section.

Page 9

Page 10

Exhaust Piping

1 - Cement exhaust piping into flue collar socket located

on the left side of the top cap.

2 - All horizontal runs of exhaust pipe must slope back

toward the unit. A minimum of 1/4 inch (6 mm) drop for each 12 inches (305 mm) of horizontal run is manĆ datory for drainage. Horizontal runs of exhaust pipĆ ing must be supported every 5 feet (1.52 m) using hangers.

NOTE - Exhaust piping should be checked carefully to make sure there are no sags or low spots.

NOTE - Exhaust piping must be insulated with 1/2 inch (13 mm) Armaflex or equivalent when run through unheated space. Do not leave any area of exhaust pipe open to outside air; exterior exhaust must be insulated with 1/2 inch (13 mm) Armaflex or equivalent.

CAUTION

Do not discharge exhaust into an existing stack or stack that also serves another gas appliance. If verĆ tical discharge through an existing unused stack is required, insert PVC pipe inside the stack until the end is even with the top or outlet end of the metal stack.

CAUTION

The exhaust vent pipe operates under positive pressure and must be completely sealed to prevent leakage of combustion products into the livĆ ing space.

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 apĆ pliances, the venting system may be too large to properly vent the remaining attached appliances. The following test should be conducted while all appliances (both in opĆ eration and those not in operation) are connected to the common venting system. If the venting system has been installed improperly, corrections must be made as outĆ lined in the previous section.

1 - Seal any unused openings in the common venting

system.

2 - Visually inspect the venting system for proper size

and horizontal pitch and determine there is no blockĆ age or restriction, leakage, corrosion or other defiĆ ciencies which could cause an unsafe condition.

3 - Close all building doors and windows, and all doors

between the space in which the appliances remainĆ

ing connected to the common venting system are loĆ cated and other spaces of the building. Turn on clothes dryers and any appliances not connected to the common venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they will operate at maximum speed. Do not operĆ ate a summer exhaust fan. Close fireplace dampers.

4 - Follow the lighting instructions. Place the appliance

being inspected in operation. Adjust thermostat so appliance will operate continuously.

5 - Test for spillage at the draft hood relief opening after

5 minutes of main burner operation. Use the flame of match or candle, or smoke from a cigarette or cigar, or a draft gauge.

6 - After determining that each appliance remaining

connected to the common venting system properly vents when tested as indicated in step 3, return doors, windows, exhaust fans, fireplace dampers and any other gasĆburning appliance to their preĆ vious condition of use.

7 - If improper venting is observed during any of the

above tests, the common venting system must be corrected. The common venting system should be resized to approach the minimum size as deterĆ mined by using the appropriate tables in appendix G in the current standards of the National Fuel Gas Code ANSI Z223-1 in the USA, and the appropriate Category 1 Natural Gas appliances venting sizing tables in the current standard of the CAN/ CGA-B149.1 in the Natural Gas Installation Code in Canada.

Intake and Exhaust Piping Terminations

Intake and exhaust pipes may be routed either horizontalĆ ly through an outside wall or vertically through the roof. In attic or closet installations, vertical termination through the roof is preferred. Figures 8 through 20 show typical terminations.

1 - Use recommended piping materials for both intake

and exhaust piping.

2 - Secure all joints, including drain leg, gas-tight using

approved cement.

3 - Piping diameters should be determined according

to length of pipe run. See table 5. Locate intake pipĆ ing upwind (prevailing wind) from exhaust piping. To avoid recirculation of exhaust gas on roof terĆ minations, end of exhaust pipe must be higher than intake pipe.

Exhaust and intake exits must be in same pressure zone. Do not exit one through the roof and one on the side. Also, do not exit the intake on one side and the exhaust on another side of the house or structure.

Page 10

Page 11

4 - Intake and exhaust pipes should be placed as close

together as possible at termination end (refer to ilĆ lustrations). Maximum separation is 3 inches (76 mm) on roof terminations and 6 inches (152 mm) on side wall terminations.

5 - Exhaust piping must terminate straight out or up as

shown. In rooftop applications, a 2 inch X 1-1/2 inch reducer for 2 inch venting, 3 inch x 2 inch reducer for 3 inch venting must be used on the exhaust piping at the point where it exits the structure to improve the velocity of exhaust away from the intake piping.

On roof terminations, the intake piping should termiĆ

nate straight down using two 90° elbows. See figure 8.

Inches (mm)

8 (203) MIN

12 (305) ABOVE AVERAGE SNOW ACCUMULATION

3 (76) MAX.

3 x 2 (76 x 51) OR

2 x 1-1/2 (51 x 38)

PVC REDUCER

1/2 (13) FOAM

INSULATION IN

UNCONDITIONED

SPACE

NOTE - During extremely cold temperatures, below approximately 20°F (6.67°C), units with long runs of vent pipe through unconditioned space, even when inĆ sulated, may form ice in the exhaust termination that prevents the unit from operating properly. Longer run times of at least 5 minutes will alleviat e mos t icing probĆ lems. Also, a heatin g cable may be installed on exhaust piping and termination to prevent freezeĆups. Heating cable installation kit is available from Lennox. See ConĆ densate Piping section for part numbers.

NOTE - Avoid recirculation of exhaust back into the inĆ take pipe.

6 - On field-supplied terminations for side wall exits, exĆ

haust piping should extend a maximum of 12 inches (305 mm) beyond the outside wall. Intake piping should be as short as possible. See figure 9.

1/2 (13) ARMAFLEX

INSULATION IN

UNCONDITIONED SPACE

2 (51) PVC 1-1/2 (38) PVC

12 (305) MIN.

2 X 1-1/2

(51 x 38)

PVC REDUCER

3 (76) OR

2 (51) PVC

PROVIDE SUPPORT

FOR INTAKE AND

EXHAUST LINES

ROOF TERMINATION KIT

(15F75) LB-49107CC for 2 (51) Venting

(44J41) LB-65678A for 3 (76) Venting

UNCONDITIONED

ATTIC SPACE

FIGURE 8

IMPORTANT

Do not use screens or perforated metal in intake and exhaust terminations. Doing so will cause freeze-ups and may block the terminations.

NOTE - If winter design temperature is below 32°F (0°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 insuĆ lated with 1/2 inch (13 mm) Armaflex or equivalent. In exĆ treme cold climate areas, 3/4 inch (19 mm) Armaflex or equivalent is recommended. Insulation on outside runs of exhaust pipe must be painted or wrapped to protect inĆ sulation from deterioration.

1/2 (13) ARMAFLEX

Inches (mm)

INSULATION

OUTSIDE

WALL

TOP VIEW

(15J74) LB-49107CB for 2 (50.8) Venting

WALL RING KIT

6 (152)

MAXIMUM

8 (203)

MINIMUM

2 (51) PVC

COUPLING

FIGURE 9

7 - On field-supplied terminations, a minimum separaĆ

tion distance between the end of the exhaust pipe and the end of the intake pipe is 8 inches (203 mm).

8 - If intake and exhaust piping must be run up a side

wall to position above snow accumulation or other obstructions, the piping must be supported every 3 fee t (.91 m) as shown in figure 14. Refer to figures 13 and 15 for proper piping method. WTK wall terminaĆ tion kit must be extended for use in this application. See figure 18 or use kit WTKX shown in figure 19. When exhaust and intake piping must be run up an outside wall, the exhaust piping is reduced to 1 1/2 inches (38 mm) after the final elbow. The intake pipĆ ing may be equ i p ped wit h a 90° elbow turndown. UsĆ in g tu rn- do wn wi ll ad d 5 fe et (1 . 5 m) to th e eq ui va len t length of the pipe.

Page 11

Page 12

1/2 (12.7) FOAM INSULATION

IN UNCONDITIONED SPACE

Inches (mm)

OUTSIDE WALL

Inches(mm)

UNCONDITIONED

SPACE

OUTSIDE WALL

12 (305) MIN. for 2 (51)

20 (508) MAX. for 3 (76)

8 (203)

MIN.

EXHAUST

INTAKE

PIPE

Optional Turndown

TOP VIEW

WALL TERMINATION

(22G44) LB-49107CD for 2 (50.8) Venting

(44J40) LB-65701A for 3 (76.2) Venting

(Intake Only)

FIGURE 10

EXHAUST

TERMINATION

INTAKE

TERMINATION

EXHAUST

CONCENTRIC ROOFTOP TERMINATION

(60G77) LB-49107CE for G32V-75 Units Only

(33K97) LB-87942 for G32V-100 & -125 Units Only

12 (305) ABOVE AVERAGE SNOW ACCUMULATION

INTAKE

Inches (mm)

FIGURE 11

OUTSIDE WALL

EXHAUST

INTAKE

Inches (mm)

CONCENTRIC WALL TERMINATION

(60G77) LB-49107CE for G32V-75 Units Only

(33K97) LB-87942 for G32V-100 & -125 Units Only

EXHAUST

TERMINATION

INTAKE

TERMINATION

12 (305) Min.

above grade.

Shown

PROVIDE SUPPORT

FOR INTAKE AND

EXHAUST LINES EVERY

36 (914)

1/2 (13) FOAM

INSULATION IN

UNCONDITIONED

SPACE

WALL RING TERMINATION

(15F74) LB-49107CB for 2 in. (51) Venting

See venting table 5 for maximum venting lengths with

SIDE VIEW

this arrangement.

12 (305) ABOVE AVERAGE SNOW ACCUMULATION

1/2 (13) FOAM

INSULATION

FIGURE 13

9 - Position termination ends so they are free from any

obstructions and above the level of snow accumulaĆ tion (where applicable). Termination ends must be a minimum of 12 inches (305 mm) above grade level. Do not point into window wells, stairwells, alcoves, courtyard areas or other recessed areas. Do not position termination ends directly below roof eaves or above a walkway. Since the G32V is a certified diĆ rect 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 NaĆ tional Fuel Gas Code ANSI Z223-1 in USA, and curĆ rent standard CAN/CGA-B149.1 of the Natural Gas Installation Instructions in Canada for details. The termination should be at least 12 inches (305 mm) from any opening through which flue products could enter the building.

When horizontally vented, minimum clearance for termination from electric meters, gas meters, regulaĆ tors and relief equipment is 4 feet (1.2 m) for US installations. Refer to the current CAN/CGA-B149.1 for installations in Canada or with authorities having local jurisdiction.

FIGURE 12

Page 12

Page 13

At vent termination, care must be taken to maintain protective coatings over building materials (proĆ longed exposure to exhaust condensate can destroy protective coatings). It is recommended that the exĆ haust outlet not be located within 6 feet (1.8 m) of a condensing unit because the condensate can damĆ age the painted coating.

METAL OR PLASTIC

STRAPPING

OR LARGE WIRE TIES

FIGURE 14

IMPORTANT

Combustion air intake inlet and exhaust outlet should not be located within 6 feet (1.8 m) of dryer vent or combustion air inlet or outlet of another apĆ pliance. Piping should not exit less than 3 feet (.91 m) from opening into another building.

IMPORTANT

For Canadian Installations Only: In accordance to CAN/CGA-B149.1 and .2, the miniĆ mum allowed distance between the combustion air intake inlet and the exhaust outlet of other apĆ pliances shall not be less than 12 inches (305 mm).

10 - Suspend piping using hangers at a minimum of every

5 feet (1.52 m) for schedule 40 PVC and every 3 feet (.91 m) for ABS-DWV, PVC-DWV, SDR-21 PVC, and SDRĆ26 PVC piping. A suitable hanger can be fabricated by using metal or plastic strapping or a large wire tie.

11 - In areas where piping penetrates joists or interior

walls, hole must be large enough to allow clearance on all sides of pipe as it passes through the center of the hole.

12 - Isolate piping at the point where it exits the outside

wall or roof.

13 - When furnace is installed in a residence where unit is

shut down for an extended period of time, such as a vacation home, make provisions for draining conĆ densate collection trap and lines.

14 - Based on the recommendation of the manufacturer,

a multiple furnace installation may use a group of up to four termination kits WTK assembled together horizontally, as shown in figure 17.

Inches(mm)

3 (76) OR

2 (51) 90_ ELBOW

Optional Turndown

(Not Shown)

May Be Used on

Intake Only

(22G44) LB-49107CD for 2(51) Venting

(44J40) LB-65701A for 3(76) Venting

Front View

INTAKE

VENT

1/2 (13) Foam

Insulation in

Unconditioned Space

Inches (mm)

WALL TERMINATION KIT (30G28) WTK

1/2 (13)

FOAM

INSULATION

FRONT VIEW

WALL TERMINATION

FIGURE 15

(305)

VENT TERMINATIONS

FIGURE 16

3 x 2 (76 x 51) OR 2 x 1-1/2 (51 x 38)

REDUCER BUSHING LOCAĆ

FOR OFFSET TERMINATION

TION

3 (76) OR

2 (51) 90_ ELBOW

EXHAUST VENT

(127)

Side View

EXHAUST VENT

INTAKE VENT

OUTSIDE WALL

Page 13

Page 14

Front View

INTAKE VENT

EXHAUST

VENT

18 MAX.

(457)

(127)

5-1/2 (140)

(305)

Inches (mm)

Front View

(864)

(229)

INTAKE

VENT

EXHAUST

VENT

NOTE - Enclosed exhaust pipe is insulated with 1/2 inch (13 mm) foam insulation. If intake and exĆ haust pipes are reversed, slit and remove foam insulation and reapply to other vent. Exhaust vent must be insulated.

Side View

EXHAUST VENT

Inches (mm)

OPTIONAL VENT TERMINATION FOR

MULTIPLE UNIT INSTALLATION

WALL TERMINATION KIT WTK

FIGURE 17

AIR

(305)

5Ć1/2 (140)

Minimum

8 (203)

Front View

INTAKE

AIR

(127)

EXHAUST

INTAKE

AIR

MODEL WTK WALL TERMINATION KIT (30G28)

EXTENDED VENT FOR GRADE CLEARANCE

VENT TERMINATIONS

FIGURE 18

INTAKE

VENT

COVER EXHAUST

VENT WITH

1/2 (13)

FOAM

INSULATION

EXHAUST

AIR

12 MIN.

(305)

Above Grade

GRADE

Side View

Inches (mm)

12 (305)

Minimum

ABOVE GRADE

GRADE

Side View

(102)

(305)

GRADE

EXHAUST VENT

8 MIN.

(203)

INTAKE

VENT

OUTSIDE WALL

GRADE

VENT TERMINATIONS

MODEL WTKX (30G79)

EXTENSION RISER FOR GRADE CLEARANCE

FIGURE 19

G32 VENTING IN EXISTING CHIMNEY

3 in. - 8 in.

8 in. - 12 in.

(203 mm - 305 mm)

INTAKE VENT

INSULATION

(OPTIONAL)

TOP PLATE

(18 GA. MIN.)

MIN. 12" (304 mm)

ABOVE ROOF

INSULATE

TO FORM

SEAL

NOTE - Do not discharge exhaust gases directly into any chimney or vent stack. If vertical discharge through an existing unused chimney or stack is required, insert piping inside chimney until the pipe open end is above top of chimney and terminate as illustrated. In any exterior portion of chimney, the exhaust vent must be insulated.

(76 mm203 mm)

STRAIGHT CUT OR

ANGLE CUT IN DIRECTION

OF ROOF SLOPE

EXHAUST VENT

1/2" (13 mm)

WEATHERPROOF

INSULATION

SHOULDERS OF FITTINGS

PROVIDE SUPPORT FOR

PIPE ON TOP PLATE

ALTERNATE

3 in. - 8 in.

(76 mm203 mm)

INTAKE VENT

EXTERIOR

PORTION

OF CHIMNEY

FIGURE 20

Page 14

Page 15

Condensate Piping

This unit is designed for either right- or left-side exit of condensate piping. Route the condensate drainline only within the conditioned space: this prevents possible freezing of the condensate, which would block the drainline. Use an electric heat cable if you route the condensate line through unconditioned areas.

CAUTION

Do not use copper tubing or existing copper conĆ densate lines for drain line.

1 - Determine which side of the unit that the condensate

will exit.

2 - Connect 1/2" (13 mm) plastic pipe plug (provided) in

the unused end of the condensate trap. Install plug so that it is sealed water tight yet able to be removed. Do not permanently seal the connection. Teflon tape is recommended to seal joint. See figure 21.

CONDENSATE ASSEMBLY

(For left or right installation)

COLD

COMBUSTION AIR

BLOWER BRACKET

HEADER

BOX

Right-Hand Side Condensate Exit:

Install the nipple/adapter assembly from the outĆ side of the cabinet and insert the adapter into the threaded opening in the condensate trap.

Left-Hand Side Condensate Exit:

Insert nipple/adapter assembly from the left-hand side of the cabinet and through the combustion air blower mounting structure into the threaded opening in the condensate trap.

5 - Connect field-supplied plumbing to nipple and route

to open drain. Plumbing should be vented to a point higher than the condensing coil. See figure 22.

CONDENSATE PLUMBING

(Plumbing must be vented higher than coil.)

NIPPLE

ADAPTER

ELBOW

CONDENSATE TRAP

NIPPLE

ADAPTER

PLUG

BOOT OR CAP

FIGURE 21

3 - Use the provided adapter (1/2" mpt X 3/4" PVC) and

a field-provided nipple to carry drainage outside the cabinet. A 1/2" CPVC x 1/2" MPT adapter and 1/2" CPVC is acceptable for use.

4 - Glue nipple to the adapter using the procedures out-

lined in the Joint Cementing Procedures" section. The nipple/adapter assembly should be connected in a non-permanent manner and must be water tight. Teflon tape is recommended to seal the joint.

FIGURE 22

6 - Connect condensate drain line [1/2" (13 mm) SDR 11

plastic pipe or tubing] to condensate connection on condensate trap assembly and route to open drain. Condensate line must be sloped downward away from condensate trap to the drain. If drain level is above condensate outlet, use a condensate pump to pump condensate to the higher level. Condensate drain line should be routed within the conditioned space to avoid freezing of condensate and blockage of drain line. If this is not possible, a heat cable kit may be used on the condensate trap and condenĆ sate line. Heating cable kit is available from Lennox in various lengths; 6 feet (1.8 m) - kit no. 26K68; 24 feet (7.3 m) - kit no. 26K99; and 50 feet (15.2 m) - kit no. 26K70. Also available from Lennox: 1/2" (12.7 mm) glass fiber tape - 39G04; 2" (50.8 mm) plum foil tape - 39G03.

Page 15

Page 16

Gas Piping

CAUTION

If a flexible gas connector is required or allowed by the authority that has jurisdiction, black iron pipe shall be installed at the gas valve and extend outĆ side the furnace cabinet.

1 - Gas piping may be routed into the unit through either

the left- or right-hand side. Supply piping enters into the gas valve from the bottom of the valve as shown in figure 23.

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 6 lists recommended pipe sizes for typiĆ cal applications.

NOTE - Use two wrenches when connecting gas pipĆ ing to avoid transferring torque to the manifold.

3 - The gas piping must not run in or through air ducts,

clothes chutes, gas vents or chimneys, dumb waitĆ ers, 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 blower. See figure 23.

LEFT SIDE PIPING

4 – The piping should be sloped 1/4 inch (6.4 mm) per 15

feet (4.57 m) upward toward the meter from the furĆ nace. The piping must be supported at proper interĆ vals [every 8 to 10 feet (2.44 to 3.01 m)] using suitĆ able hangers or straps. A drip leg should be installed in vertical pipe runs to the unit.

5 - In some localities, codes may require installation of a

manual main shutĆoff valve and union (furnished by the installer) external to the unit. Union must be of the ground joint type.

NOTE - Install a 1/8 inch NPT plugged tap in the field pipĆ ing upstream of the gas supply connection to the unit. The tap must be accessible for test gauge connection. See figure 24.

MANUAL MAIN SHUT-OFF

VALVE WILL NOT HOLD

NORMAL TEST PRESSURE

1/8 in. (3.2 mm) NPT

PLUGGED TAP

CAP

FURNACE

ISOLATE

GAS VALVE

FIGURE 24

Leak Check

After gas piping is completed, carefully check all piping connections (factory- and field-installed) for gas leaks. Use a leak detecting solution or other preferred means.

MANUAL MAIN

SHUT-OFF

VALV E

1/8 in. NPT PLUGGED

TAP

GAS VALVE

RIGHT SIDE PIPING

(STANDARD)

FIGURE 23

MANUAL MAIN

SHUT-OFF

VALV E

1/8 in. NPT PLUGGED

TAP

IMPORTANT

Some soaps used for leak detection are corrosive to certain metals. Carefully rinse piping thoroughly after leak test has been completed. Do not use matches, candles, flame, or other sources of igniĆ tion to check for gas leaks.

IMPORTANT

The furnace must be isolated from the gas supply piping system by closing its individual manual shut-off valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psig (3.45 kPa). See figure 24.

The furnace and its individual shut-off valve must be disconnected from the gas supply piping sysĆ tem during any pressure testing of the system at test pressures greater than 1/2 psig (3.45 kPa).

Page 16

Page 17

Nominal Internal

Nominal

Internal

Iron Pipe Size

-Inches(mm)

1/4

(6.35)

3/8

(9.53)

1/2

(12.7)

3/4

(19.05)

(25.4)

1-1/4

(31.75)

1-1/2

(38.1)

(50.8)

2-1/2

(63.5)

(76.2)

(101.6)

Diameter

-Inches(mm)

.364

(9.246)

.493

(12.522)

.622

(17.799)

.824

(20.930)

1.049

(26.645)

1.380

(35.052)

1.610

(40.894)

2.067

(52.502)

2.469

(67.713)

3.068

(77.927)

4.026

(102.260)

NOTE - Capacity given in cubic feet (m

GAS PIPE CAPACITY - ft.3/hr (m3/hr)

TABLE 6

Length of Pipe-Feet (m)

(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)

(1.13)

(2.69)

175

(4.96)

360

(10.19)

680

(19.25)

1400

(39.64)

2100

(59.46)

3950

(111.85)

6300

(178.39)

11000

(311.48)

23000

(651.27)

) of gas per hour and based on 0.60 specific gravity gas.

(.82)

(1.84)

120

(3.40)

250

(7.08)

465

(13.17)

950

(26.90)

460

(41.34)

2750

(77.87)

4350

(123.17)

7700

(218.03)

15800

(447.39)

(.68)

(1.47)

(2.75)

200

(5.66)

375

(10.62)

770

(21.80)

1180

(33.41)

2200

(62.30)

3520

(99.67)

6250

(176.98)

12800

(362.44)

(.57)

(1.27)

(2.32)

170

(4.81)

320

(9.06)

660

(18.69)

990

(28.03)

1900

(53.80)

3000

(84.95)

5300

(150.07)

10900

(308.64)

(.51)

(1.13)36(1.02)

(2.07)66(1.87)

151

(4.28)

285

(8.07)

580

(16.42)

900

(25.48)

1680

(47.57)

2650

(75.04)

4750

(134.50)

9700

(274.67)

(3.91)

(7.36)

(15.01)

(22.94)

(43.04)

(67.96)

(121.76)

(249.18)

(.45)

138

260

530

810

1520

2400

4300

8800

(.42)

(.73)

(1.73)

125

(3.54)

240

(6.80)

490

(13.87)

750

(21.24)

1400

(39.64)

2250

(63.71)

3900

(110.43)

8100

(229.36)

(.40)

(.88)

(1.61)

118

(3.34)

220

(6.23)

460

(13.03)

690

(19.54)

1300

(36.81)

2050

(58.05)

3700

(104.77)

7500

(212.37)

(.37)

(.82)

(1.50)

110

(3.11)

205

(5.80)

430

(12.18)

650

(18.41)

1220

(34.55)

1950

(55.22)

3450

(97.69)

7200

(203.88)

100

(30.480)

(.34)

(.76)

(1.42)

103

(2.92)

195

(5.52)

400

(11.33)

620

(17.56)

1150

(32.56)

1850

(52.38)

3250

(92.03)

6700

(189.72)

Electrical

A field make-up box is provided for line voltage wiring. Line voltage wiring to unit is done through the J69 jack from the field make-up box to plug P69 from the control box. See figures 25 and 26 for make-up box installation.

Refer to figure 27 for schematic wiring diagram and trouĆ bleshooting, figure 28 for point-to-point field wiring and figure 29 for a detailed illustration of the Surelight inteĆ grated control.

ELECTROSTATIC DISCHARGE (ESD)

Precautions and Procedures

CAUTION

Electrostatic discharge can affect electronic comĆ ponents. Take precautions during furnace installaĆ tion and service to protect the furnace's electronic controls. Precautions will help to avoid control exĆ posure to electrostatic discharge by putting the furnace, the control and the technician at the same electrostatic potential. Neutralize electrostatic charge by touching hand and all tools on an unĆ painted unit surface, such as the gas valve or blowĆ er deck, before performing any service procedure.

1 - Select circuit protection and wire size according to

the unit nameplate. The power supply wiring must meet Class 1 restrictions.

2 - A snaphole bushing is provided to seal around the

wiring as it enters the cabinet. A snaphole plug is proĆ vided to seal the unused wire entry hole.

3 - Install a separate disconnect switch (protected by eiĆ

ther a fuse or circuit breaker) near the unit so that power can be turned off for servicing.

4 - Install field makeĆup box on either side, inside or out

of the cabinet. Knockouts are provided in box and cabinet to facilitate wiring. See figures 25 and 26.

To ensure proper grounding of the furnace, two lockĆ washers are included in the electrical make-up box bag assembly. Place each lockwasher on a securing screw before installing the make-up box. Make sure the lockwasher breaks the paint on the cabinet so that the washer is touching metal. Unit is not properly grounded if paint has not been removed by the lockĆ washer.

5 - Remove cap from knockout in blower deck on the

same side as the installed make-up box.

6 - Insert the three-pin (P69) plug from the control box

into the knockout provided in the blower deck.

7 - Connect jack (J69) from make-up box to jack plug in

blower deck.

8 - Before connecting the thermostat or the power wirĆ

ing, check to make sure the wires will be long enough for servicing at a later date. Remove the blower acĆ cess panel to check the length of the wire.

9 - Electrically ground unit in accordance with local

codes or, in the absence of local codes, according to 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.

Page 17

Page 18

IMPORTANT

Ignition control will not operate unless unit is propĆ erly grounded. 120V supply must be installed with correct polarity.

CAUTION

Bundle all wires connected to control board in such a way that drip loops are formed. Drip loops direct damaging moisture away from control board.

INTERIOR MAKE-UP BOX INSTALLATION

MAKE-UP

BOX

J69

BUSHING

FIGURE 25

EXTERIOR MAKEĆUP BOX INSTALLATION

MAKE-UP

BOX

J69

P69 from

Control Box

BUSHING

10 -One line voltage EAC" terminal is provided on the

furnace control board. Any electronic air cleaner rated up to one amp can be connected to this termiĆ nal with the neutral leg of the circuit being connected to the neutral EAC" terminal. See figure 29 for conĆ trol board configuration. This terminal is energized when the indoor blower is operating.

11 -One line voltage HUM" terminal is provided on the

furnace control board. Any humidifier rated up to one amp can be connected to this terminal with the neuĆ tral leg of the circuit being connected to the neutral HUM" terminal. See figure 29 for control board conĆ figuration. This terminal is energized in the heating mode whenever the combustion air inducer is operĆ ating.

12 - Install room thermostat according to instructions

provided with thermostat. The furnace may be conĆ trolled by either a single- or two-stage thermostat. If furnace is being used with heat pump refer to FM21 installation instruction.

13 - Complete wiring connections to equipment using

wiring diagrams provided with unit and figures 27 and 28. Use 18-gauge wire or larger that is suitable for Class II rating for thermostat connections. See table 7 for diagrams for specific applications.

Indoor Blower Speeds

1 - When the thermostat is set to FAN ON," the indoor

blower will run continuously at approximately 38% of the second-stage cooling speed when there is no cooling or heating demand.

2 - When the G32V unit is running in the heating mode,

the indoor blower will run on the heating speed desigĆ nated by the positions of dip switches 11 and 12.

3 - When there is a cooling demand, the indoor blower

will run on the cooling speed designated by the posiĆ tions of dip switches 5 and 6.

P69 from

Control Box

FIGURE 26

Page 18

Page 19

TYPICAL G32V SCHEMATIC WIRING DIAGRAM

FIGURE 27

Page 19

Page 20

TYPICAL G32V FIELD WIRING DIAGRAM

FIGURE 28

Thermostat

1 Heat / 1 Cool

NOTE - Use dip switch 3 to set second-stage heat ON delay. ON-10 minutes. OFF-15 minĆ utes.

1 Heat / 1 Cool with CCB1

NOTE - Use dip switch 3 to set second-stage heat ON delay. ON-10 minutes. OFF-15 minĆ utes.

TABLE 7

Field Wiring Applications

Jumper Settings (See figure 29)

E20

Term. Strip

Y1 to Y2

W914 W951

SINGLE Yes Intact Intact

SINGLE Yes Cut Intact

Wiring Connections

T'STAT

CONTROL

TERM. STRIP

CCB1

CONTROL

TERM. STRIP

OUTDOOR

UNIT

OUTDOOR

UNIT

Page 20

Page 21

Thermostat

1 Heat / 2 Cool

NOTE - Use dip switch 3 to set second-stage heat ON delay. ON-10 minutes. OFF-15 minĆ utes.

TABLE 7

Field Wiring Applications (Continued)

Jumper Settings (See figure 29)

E20

Term. Strip

Y1 to Y2

W914 W951

SINGLE No Intact Intact

Wiring Connections

T'STAT

CONTROL

TERM. STRIP

OUTDOOR

UNIT

1 Heat / 2 Cool

SINGLE No Cut Intact

with CCB1

NOTE - Use dip switch 3 to set second-stage heat ON delay. ON-10 minutes. OFF-15 minĆ utes.

2 Heat / 2 Cool TWO No Intact Intact

T'STAT

CCB1

CONTROL

TERM. STRIP

CONTROL

TERM. STRIP

OUTDOOR

UNIT

OUTDOOR

UNIT

2 Heat / 2 Cool

TWO No Cut Intact

with CCB1

Page 21

T'STAT

CCB1

CONTROL

TERM. STRIP

OUTDOOR

UNIT

Page 22

TABLE 7

Field Wiring Applications (Continued)

Jumper Settings (See figure 29)

Thermostat

E20

Term. Strip

Y1 to Y2

W914 W951

2 Heat / 1 Cool TWO Yes Intact Intact

Wiring Connections

T'STAT

CONTROL

TERM. STRIP

OUTDOOR

UNIT

FM21 Heat Pump / 1 Cool

Harmony Application* 2 Heat / 1 Cool

SINGLE Yes Intact Cut

TWO Yes Cut Intact

*Disconnect existing furnace transformer and replace with 75VA, 24V transformer if deĆ frost option to be used.

75VA, 24V

TRANSFORMER*

NOTE - Wiring connecĆ tions to outdoor unit and thermostat made at FM21 control board per FM21 instructions.

TEMP.

MOD.

SWITCH

FAN LO

FAN LINE

HARMONY

CONTROL

TERM. STRIP

CONTROL

TERM. STRIP

FM21

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

OUTĆ

DOOR

UNIT

Harmony

TWO No Cut Intact Application* 2 Heat / 2 Cool

*Cut wires at pin positions 2 and 13 of J/P46. Insulate ends to prevent a short. Blower operates on PWM signal generated by Harmony. Harmony overrides blower speed taps. Blower speed varies according to zone demand. Low and high-fire controlled by temperature modulating switch.

Page 22

TEMP.

MOD.

SWITCH

FAN LO

FAN LINE

HARMONY

CONTROL

TERM. STRIP

OUTĆ

DOOR

UNIT

Page 23

Integrated Control Board Settings

TWO-STAGE, VARIABLE SPEED INTEGRATED CONTROL BOARD

DIAGNOSTIC

LEDs

DIP

SWITCHES

1 - 3

E20

THERMOSTAT

SELECTION

JUMPER

1/4" QUICK CONNECT TERMINALS

THERMOSTAT CONNECTIONS (TB1)

LEDs

ON-BOARD

JUMPER W914

(cut when CCB1 or

Harmony II are used)

FACTORY-

INSTALLED

JUMPER

ON-BOARD

JUMPER W951

(cut when heat pump is

used with FM21)

DIP

SWITCHES

5 - 12

LED

FIGURE 29

G32V units are equipped with a two-stage, variable speed SureLight integrated control. This control manĆ ages ignition timing, heating mode fan off delays and inĆ door blower speeds based on selections made using the control dip switches and jumpers. The control includes an internal watchguard feature which automatically resets the ignition control when it has been locked out because the burner has failed to light. After one hour of continuous thermostat demand for heat, the watchguard will break and remake thermostat demand to the furnace and autoĆ matically reset the control to relight the furnace.

Thermostat Selection Jumper (E20)

This unit may be used with either a single-stage or twostage thermostat. The thermostat selection jumper, loĆ cated just below dip switches 1 through 3, must be propĆ erly positioned for the particular application. The jumper is factory positioned for use with a two-stage thermostat. If a single-stage thermostat is to be used, the jumper must be repositioned.

DIP SWITCH FUNCTIONS

DIP SWITCH(ES) FUNCTION

1 and 2 Blower Off Delay

3 Second Stage ON Delay (Single-stage t'stat)

4 Not used 5 and 6 Cooling Mode Blower Speed 7 and 8 Blower Speed Adjustment

9 and 10 Cooling Mode Blower Ramping Profile

11 and 12 Heating Mode Blower Speed

a - Select TWO" for two-stage heating operation conĆ

trolled by a two-stage heating thermostat (factory setting);

b - Select SINGLE" for two-stage heating operation

controlled by a single-stage heating thermostat. This setting provides a timed delay before secondstage heat is initiated.

Dip Switch Settings Switches 1 and 2 -- Blower Off Delay -- The blower-on

delay of 45 seconds is not adjustable. The blower-off deĆ lay (time that the blower operates after the heating deĆ mand has been satisfied) can be adjusted by moving switches 1 and 2 on the integrated control board. The unit is shipped from the factory with a blower-off delay of 90 seconds. The blower off delay affects comfort and is adĆ justable to satisfy individual applications. Adjust the blowĆ er off delay to achieve a supply air temperature between 90° and 110°F at the exact moment that the blower is de-

Page 23

Page 24

energized. Longer off delay settings provide lower supply air temperatures; shorter settings provide higher supply air temperatures.The table below provides the blower off timings that will result from different switch settings.

TABLE 8

Blower Off Delay Switch Settings

Blower Off Delay

(Seconds)

Switch 1 Switch 2

60 Off Off

90 Off On 120 On Off 180 On On

Switch 3 -- Second Stage Delay (Used with SingleStage Thermostat Only) -- This switch is used to deterĆ

mine the second stage on delay when a single-stage therĆ mostat is being used. The switch is factory-set in the ON position, which provides a 10-minute delay before secĆ ond-stage heat is initiated. If the switch is toggled to the OFF position, it will provide a 15-minute delay before secĆ ond-stage heat is initiated. This switch is only activated when the thermostat selector jumper is positioned for SINGLE-stage thermostat use.

Switch 4 -- Not used in G32V application.

Switches 5 and 6 -- Cooling Mode Blower Speed --

Switches 5 and 6 are used to select cooling blower motor speed. The unit is shipped from the factory with the dip switches positioned for high speed (4) indoor blower moĆ tor operation during the cooling mode. The table below provides the cooling mode blower speeds that will result from different switch settings. Refer to tables 13 through 13 for corresponding cfm values.

TABLE 9

Cooling Mode Blower Speeds

Speed Switch 5 Switch 6

1 - Low On On

2 - Medium Low Off On

3 - Medium High On Off

4 - High (Factory) Off Off

Switches 7 and 8 -- Blower Speed Adjustment --

Switches 7 and 8 are used to select blower speed adjustĆ ment settings. The unit is shipped from the factory with the dip switches positioned for NORMAL (no) adjustĆ ment. The dip switches may be positioned to adjust the blower speed by -15% to better suit the application. The table below provides blower speed adjustments that will result from different switch settings. Refer to tables 13 and14 for corresponding cfm values.

TABLE 10

Blower Speed Adjustment

Adjustment Switch 7 Switch 8

NORMAL (Factory) Off Off

-15% (approx.) Off On

Switches 9 and 10 -- Cooling Mode Blower Speed Ramping -- Switches 9 and 10 are used to select cooling

mode blower speed ramping options. Blower speed ramping may be used to enhance dehumidification perĆ formance. The switches are factory set at option A which has the greatest effect on blower motor performance. The table below provides the cooling mode blower speed ramping options that will result from different switch setĆ tings. The cooling mode blower speed ramping options are detailed below.

TABLE 11

Cooling Mode Blower Speed Ramping

Ramping Option Switch 9 Switch 10

A (Factory) Off Off

B On Off C Off On D On On

Ramping Option A (Factory Selection)

 Motor runs at 50% for 1/2 minute.  Motor then runs at 82% for approximately 7-1/2 miĆ

nutes.

 If demand has not been satisfied after 7-1/2 minutes,

motor runs at 100% until demand is satisfied.

 Once demand is met, motor runs at 50% for 1/2 minĆ

ute.

 Motor ramps down to off.

OFF

1/2 MIN

50% CFM

7-1/2 MIN 82% CFM

COOLING DEMAND

100% CFM

1/2 MIN 50% CFM

OFF

Ramping Option B

 Motor runs at 50% for 1/2 minute.  Motor then runs at 82% for approximately 7-1/2 miĆ

nutes.

 If demand has not been satisfied after 7-1/2 minutes,

motor runs at 100% until demand is satisfied.

 Once demand is met, motor ramps down to off.

OFF

1/2 MIN 50% CFM

7-1/2 MIN 82% CFM

COOLING DEMAND

100% CFM

OFF

Ramping Option C

 Motor runs at 82% for approximately 7-1/2 minutes.  If demand has not been satisfied after 7-1/2 minutes,

the motor runs at 100% until demand is satisfied.

 Once demand is met, motor ramps down to off.

OFF

7-1/2 MIN

82%CFM

COOLING DEMAND

100% CFM

OFF

Ramping Option D

 Motor runs at 100% until demand is satisfied.  Once demand is met, motor ramps down to off.

Page 24

Page 25

100% CFM

COOLING DEMAND

OFFOFF

Switches 11 and 12 -- Heating Mode Blower Speed --

Switches 11 and 12 are used to select heating mode blowĆ er motor speed. The unit is shipped from the factory with the dip switches positioned for medium low (2) speed inĆ door blower motor operation during the heating mode. The table below provides the heating mode blower speeds that will result from different switch settings. Refer to tables 13 and 14 for corresponding cfm values.

TABLE 12

Heating Mode Blower Speeds

Speed Switch 11 Switch 12

1 - Low On On

2 - Medium Low

(Factory)

Off On

3 - Medium High On Off

4 - High Off Off

On-Board Jumper W914

On-board jumper W914, which connects terminals DS and R on the integrated control board, must be cut when the furnace is installed with either the Harmony II zone control board or the CCB1 EfficiencyPlus humidity conĆ trol. Refer to table 15 for operation sequence in applicaĆ

tions including a G32V, CCB1 and single-speed outdoor unit. Table 16 gives the operation sequence in applicaĆ tions with a two-speed outdoor unit.

On-Board Jumper W951

On-board jumper W951, which connects terminals R and O on the integrated control board, must be cut when the furnace is installed in applications which include a heat pump unit and the FM21 FuelMaster control board.

Factory-Installed Jumper Y1 to Y2

A factory-installed jumper from Y1 to Y2 terminals on the integrated control board terminal strip must be removed if two-stage cooling will be used.

Diagnostic LEDs (DS1 and DS2)

Two diagnostic LEDs are located on the two-stage, variĆ able speed integrated control just to the left of the first bank of dip switches. The LED flashes correspond with diagnostic codes detailed on page 35.

Status LEDs (HEAT, HI/LO, ON/OFF and CFM)

The integrated control includes four LEDs which indicate operating status. The green ON/OFF LED is lit any time the blower is operating. The green CFM LED indicates the blower motor speed. Count the number of blinks beĆ tween the two-second pauses to determine the CFM. Each blink represents approximately 100 CFM. The yelĆ low HI/LO LED is lit when the W914 (DS to R) jumper has not been clipped for CCB1 or Harmony operation. The yellow HEAT LED is lit when the indoor blower is operatĆ ing at the HEATING speed.

Page 25

Page 26

TABLE 13

G32V3-75 BLOWER MOTOR PERFORMANCE

0.0" to 0.8" w.g. (0 through 200 Pa) External Static Pressure Range

Blower Speed Adjustment Settings (Switches 5 and 6)

Cool

Adjust"

Setting

1 2 3 4 1 2 3 4

cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s

Norm 880 415 930 440 980 465 1040 490 1060 500 1105 520 1260 595 1330 630



775 365 810 380 850 400 910 430 930 440 970 460 1070 505 1130 535

Low Speed High Speed

Blower Speed Adjustment Settings (Switches 7 and 8)

Heat

Adjust"

Setting

1 2 3 4 1 2 3 4

cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s

Norm 945 446 1025 484 1125 531 1270 599 1080 510 1172 533 1286 607 1452 685



803 379 871 411 956 451 1080 510 918 433 996 470 1093 516 1234 582

15% lower motor speed than NORM switch setting.

NOTE - The effect of static pressure and filter resistance is included in air volumes shown. NOTE - Continuous Fan only speed is approximately 800 cfm (380 L/s) - non adjustable. NOTE - Lennox Harmony IIt zone control applications - MAX CFM is determined by COOL switch setting with a minimum of approximately 850 cfm (400 L/s) for all positions.

Low Speed High Speed

TABLE 14

G32V5-100/125 BLOWER MOTOR PERFORMANCE

0.0" to 0.8" w.g. (0 through 200 Pa) External Static Pressure Range

Blower Speed Adjustment Settings (Switches 5 and 6)

Cool

Adjust"

Setting



cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s

Low Speed High Speed



3 4 1



3 4

Norm 1140 540 1250 590 1440 680 1550 730 1620 765 1820 860 2000 945 2100 990



970 455 1060 500 1280 605 1320 595 1380 650 1550 730 1700 800 1780 840

Blower Speed Adjustment Settings (Switches 7 and 8)

Heat

Adjust"

Setting

1 2 3 4 1 2 3 4

cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s

Norm 1140 540 1250 590 1440 680 1550 730 1560 735 1720 810 2030 960 2150 1015



15% lower motor speed than NORM switch setting. G32V5-125 Models Only - Do not set switches for position #1 (at NORM or ć" setting) or position #2 (at -" setting) for HEAT speed.

NOTE - The effect of static pressure and filter resistance is included in air volumes shown. NOTE - Continuous Fan only speed is approximately 1150 cfm (545 L/s) - non adjustable. NOTE - Lennox Harmony IIt zone control applications - MAX CFM is determined by COOL switch setting with a minimum of approximately 1140 cfm (540 L/s) for all positions.

970 455 1060 500 1280 605 1320 595 1330 660 1460 690 1730 815 1830 865

Low Speed High Speed

Page 26

Page 27

Unit Start-Up

FOR YOUR SAFETY READ BEFORE LIGHTING

WARNING

Do not use this furnace if any part has been underĆ water. Immediately call a qualified service techniĆ cian to inspect the furnace and to replace any part of the control system and any gas control which has been under water.

WARNING

If overheating occurs or if gas supply fails to shut off, shut off the manual gas valve to the appliance before shutting off electrical supply.

CAUTION

Before attempting to perform any service or mainĆ tenance, turn the electrical power to unit OFF at disconnect switch.

BEFORE LIGHTING 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 switch by hand, do not try to repair it. Call a qualified service technician. Force or attempted repair may result in a fire or explosion.

G32V units are equipped with a SureLight ignition sysĆ tem. Do not attempt to manually light burners on this furĆ nace. Each time the thermostat calls for heat, the burners will automatically light. The ignitor does not get hot when there is no call for heat on units with SureLight ignition system.

Gas Valve Operation

WARNING

If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury, or death.

1 - STOP! Read the safety information at 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.

5 - Remove unit access panel. 6 - Turn gas valve knob to OFF position. See figure 30. 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.

HONEYWELL VR8205 SERIES GAS VALVE

HIGH FIRE

ADJUSTING SCREW

(under cap)

MANIFOLD

PRESSURE

TAP

LOW FIRE

ADJUSTING SCREW

(under cap)

INLET PRESSURE

TAP

GAS VALVE SHOWN IN OFF POSITION

FIGURE 30

8 - Turn gas valve knob to ON position. 9 - Replace access panel. 10 - Turn on all electrical power to unit. 11 - Set thermostat to desired setting. 12 - If the appliance will not operate, follow the instrucĆ

tions given in the "Turning Off Gas To Unit" section and call your service technician or gas supplier.

Turning Off Gas To Unit

1 - Set thermostat to lowest setting. 2 - Turn off all electrical power to unit if service is to be

performed.

3 - Remove access panel. 4 - Turn gas valve knob to OFF position. Do not force. 5 - Replace access panel.

Heating Sequence of Operation

NOTE - The thermostat jumper on the control board is facĆ tory-set in the TWO-STAGE" position.

Applications Using a Two-Stage Thermostat A - Heating Sequence -- Control Board Thermostat Selection Jumper (E20) in Two-Stage" Position (Factory Setting)

1 - On a call for heat, thermostat first-stage contacts

close sending a signal to the integrated control. The integrated control runs a selfĆdiagnostic program and checks high temperature limit switch for normalĆ ly closed contacts and pressure switch(es) for norĆ mally open contacts.The combustion air inducer is energized at low speed and the humidifier terminal is energized.

2 - Once the control receives a signal that the low presĆ

sure switch has closed, the combustion air inducer begins a 15-second pre-purge in low speed.

Page 27

Page 28

3 - After the pre-purge is complete, a 20-second initial

ignitor warm-up period begins. The combustion air inducer continues to operate at low speed.

4 - After the 20-second warm-up period has ended, the

gas valve is energized on low fire (first stage) and igniĆ tion occurs. At the same time, the control module sends a signal to begin an indoor blower 45-second ON-delay. When the delay ends, the indoor blower motor is energized on the low-fire heating speed. The furnace will continue this operation as long as the thermostat has a first-stage heating demand.

5 - If second-stage heat is required, the thermostat secĆ

ond-stage heat contacts close and send a signal to the integrated control. The integrated control initiĆ ates a 30-second second-stage recognition delay.

6 - At the end of the recognition delay, the integrated

control energizes the combustion air inducer at high speed. The control also checks the high-fire (second stage) pressure switch to make sure it is closed.The high fire (second stage) gas valve is energized and the indoor blower motor is energized for operation at the high fire heating speed.

7 - When the demand for high fire (second stage) heat

is satisfied, thecombustion air inducer is switched to the low-fire heating speed and the high-fire (second stage) gas valve is de-energized. The low-fire (first stage) gas valve continues operation. The indoor blower motor is switched to the low-fire heating speed.

8 - When the thermostat demand for low-fire (first

stage) heat is satisfied, the gas valve is de-energized and the field-selected indoor blower off delay begins. The combustion air inducer begins a 5-second postpurge period.

9 - When the combustion air post-purge period is comĆ

plete, the inducer and humidifier terminal are de-enĆ ergized. The indoor blower is de-energized at the end of the off delay.

Applications Using A Single-Stage Thermostat

B - Heating Sequence -- Control Board Thermostat Selection Jumper (E20) in Single-Stage" Position

NOTE - In these applications, two-stage heat will be initiĆ

ated by the integrated control if heating demand has not been satisfied after the field adjustable period (10 or 15 minutes).

1 - On a call for heat, thermostat first-stage contacts

2 - Once the control receives a signal that the low presĆ

sure switch has closed, the combustion air inducer begins a 15-second pre-purge in low speed.

3 - After the pre-purge is complete, a 20-second initial

ignitor warm-up period begins. The combustion air inducer continues to operate at low speed.

4 - After the 20-second warm-up period has ended, the

gas valve is energized on low fire (first stage) and igniĆ tion occurs. At the same time, the control module sends a signal to begin an indoor blower 45-second ON-delay. When the delay ends, the indoor blower motor is energized on the low-fire heating speed. The integrated control also initiates a second-stage on delay (factory-set at 10 minutes; adjustable to 15 minutes).

5 - If the heating demand continues beyond the second-

stage on delay, the integrated control energizes the combustion air inducer at high speed. The control also checks the high-fire (second stage) pressure switch to make sure it is closed.The high-fire (second stage) gas valve is energized and the indoor blower motor is energized for operation at the high fire heatĆ ing speed.

6 - When the thermostat heating demand is satisfied,

thecombustion air inducer begins a 5-second low speed post-purge. The field-selected indoor blower off delay begins. The indoor blower operates at the low-fire heating speed.

7 - When the combustion air post-purge period is comĆ

plete, the inducer and humidifier terminal are de-enĆ ergized. The indoor blower is de-energized at the end of the off delay.

Page 28

Page 29

TABLE 15

Dehumidification mode begins when rela

satisfied between

lid

OPERATING SEQUENCE

G32V, CCB1 and Single-Speed Outdoor Unit

OPERATING MODE SYSTEM DEMAND SYSTEM RESPONSE

System Condition

Thermostat

Demand

Normal operation Y1

*Call for humidity

removal during

cooling demand

Dehumidification

demand satisfied during cooling deĆ

mand.

Call for cooling after

call for humidity

removal.

None

*Relative Humidity

(EfficiencyPlus Lights)

No demand. Humidity

level is acceptable

Humidity level rises

above setpoint. Demand

initiated.

Humidity level falls below

setpoint. No demand

Humidity level above setĆ

point. Demand initiated.

Humidity level above setĆ

point. Demand initiated.

Blower

CFM

(COOL)

COOL

77%/74%

of COOL

COOL

Off

77%/74%

of COOL

Comments

Compressor demand and indoor blower speed controlled by thermostat demand.

Call for dehumidification initiated by CCB1 control. Indoor blower speed reduced by CCB1 control.

When humidity demand is satisfied, blowĆ er speed immediately increases to the COOL CFM to hasten the end of the cycle.

Dehumidification mode begins when relaĆ tive humidity is greater than setpoint.

Humidity demand

satisfied between

thermostat demands

(unit off cycle).

NOTE - When changing unit mode of operation from cooling to heating, indicating lights that are on will stay on until the first thermostat heating demand. * Reduced blower speed is 77% of COOL for V3 units and 74% of COOL for the V5 units.

None Over setpoint (1 or more) Off

Y1 Change to acceptable COOL

While unit is not operating (no thermostat

emand), s

e switch is moved down an

back up. Blower operates at COOL CFM.

Page 29

Page 30

TABLE 16

Normal operation

blower speed controlled by

removal during

until after initial thermostat demand is

humidity duri

point, or if slide switch is moved signifi

When humidity demand is satisfied,

isfied during

speed compressor operation at begin

compressor) begins with next thermo

isfied between thermo

OPERATING SEQUENCE

G32V, CCB1 and Two-Speed Outdoor Unit

OPERATING MODE SYSTEM DEMAND SYSTEM RESPONSE

System

Condition

Normal operation

Call for humidity

1st-stage cooling

demand

Significant increase in

thermostat cooling

demand.

Humidity demand satĆ

isfied durin

thermostat demand.

Call for humidity

removal during 2nd

stage thermostat

eman

*Call for 1st stage

cooling after call for

humidity removal.

Call for 2nd stage

cooling after call for

humidity removal

Call for cooling after

significant increase in

humidity

Humidity demand satĆ

isfied between thermoĆ

stat demands (unit off

cycle). Y1 or Y2

Note - During mode of operation change from cooling to heating, indicating lights will not change until the first thermostat heatĆ ing demand.

Thermostat

Demand

Y1 No demand. Acceptable Low

Y2 No demand. Acceptable High HIGH COOL

Y1 No demand. Acceptable Low

Demand satisfied

None

Y1 or Y2

None

*Relative Humidity

(EfficiencyPlus Lights)

Humidity level rises slightly

(1) above setpoint. Demand

initiated.

Humidity level remains slightĆ

ly (1) above setpoint. DeĆ

mand continues.

Humidity level remains slightĆ

ly (1) above setpoint. DeĆ

mand continues.

No demand. Acceptable

Humidity level rises signifiĆ

cantly (2 or more) above setĆ

point. Demand initiated.

Humidity level

above setpoint.

Humidity level falls below

setpoint. No demand.

No demand. Acceptable

Humidity level rises slightly

(1) above setpoint. Demand

initiated.

No demand. Acceptable

Humidity level is slightly (1)

above setpoint.

Humidity level is slightly (1)

above setpoint.

Humidity level is slightly (1)

above setpoint.

Humidity level is slightly (1)

above setpoint.

Humidity level is significantly

above setpoint (2 or more).

Humidity level is significantly

above setpoint (2 or more).

Humidity level is slightly (1)

above setpoint.

Humidity level falls below

setpoint. No demand.

****Compressor

Speed

Low

Off

High

Low

High

Off

Low

High

Off

Low

Off

High

Off

High

Off

High

Blower CFM

HIGH COOL

**77%/74% of

HIGH COOL

**77%/74% of

HIGH COOL

**77%/74% of

HIGH COOL

**77%/74% of

HIGH COOL

**77%/74% of

HIGH COOL

**77%/74% of

HIGH COOL

(COOL)

55% of

Off

55% of

Off

55% of

Off

55% of

Off

Comments

Compressor demand and indoor

blower speed controlled by

thermostat demand

Dehumidification mode does not begin

satisfied and new cooling demand is iniĆ

tiated.

If humidity rises significantly above setĆ point, or if slide switch is moved signifiĆ

cantly, unit will immediately go into deĆ

humidification mode (in presence of

thermostat demand).

When humidity demand is satisfied,

blower immediately shifts to the COOL

CFM in order to hasten the end of the

cycle. Unit can only shift out of high

speed compressor operation at beginĆ

ning of next cycle.

Blower immediately changes speed in

response to thermostat demand.

Dehumidification mode (high speed

compressor) begins with next thermoĆ

stat demand after initial demand is satĆ

isfied.

Reduced blower speed (dehumidificaĆ

tion speed) begins immediately with

thermostat demand

If humidity increases significantly over

setpoint, or if slide switch is moved, unit

immediately goes into dehumidification

mode (in presence of thermostat deĆ

mand).

While unit is not operating (no thermoĆ

stat demand), slide switch is moved

down and back up. Blower and comĆ

pressor operate at high speed until next

thermostat demand.

*IMPORTANT Ć If power to unit is turned on with CCB1 calling for humidity removal, outdoor unit may be locked into high speed indefinitely. To reset, move the humidity slide switch all the way down then back up to desired setpoint while the unit is running. ** Reduced blower speed is 77% of COOL for the V3 units; 74% of COOL for V5. ***If the two-speed control on a two-speed outdoor unit is set for LATCH 2 (15 minutes) or LATCH 3 (30 minutes), the compresĆ sor will latch into high speed after a Y1 demand has occurred for that period of time.

Page 30

Page 31

Gas Pressure Adjustment

TABLE 17

Manifold Pressure (Outlet) in. w.c. (kPa)

No gas pressure adjustment is needed when operating at altitudes from 0 to 4500 ft. (0 to 8 m). See below for correct manifold pressures

for altitudes greater than 4500 ft. (1372 m) for natural and L.P. gas.

Manifold Pressure (outlet) in. w.g. (kPa)

Model No.

G32V-75 natural 3.5 3.5 3.5 3.5

G32V-100 natural

G32V-125 natural

G32V-75L.P. 7.5 7.5 7.5 7.5

G32V-100 L.P. 7.5 (1.90) 7.3 (1.81) 7.1 (1.80) 7.0 (1.74)

G32V-125 L.P. 7.5 (1.90) 7.3 (1.81) 7.1 (1.80) 7.0 (1.74)

0 to 4500 ft. (0 to 1372 m)

above sea level

3.5 (0.87) 3.4 (0.85) 3.3 (0.82) 3.2 (0.80)

4501 to 5500 ft.

(1373 to 1676 m)

above sea level

5501 to 6500 ft.

(1677 to 1981 m)

above sea level

6501 to 7500 ft.

(1982 to 2286 m)

above sea level

Gas Flow

To check for proper gas flow to the combustion chamber, determine the Btu (kW) input from the unit rating plate. DiĆ vide this input rating by the Btu (kW) per cubic foot (cubic meter) of available gas. The result is the required number of cubic feet (cubic meter) per hour. Determine the flow of gas through the gas meter for two minutes and multiply by 30 to get the hourly flow of gas.

Gas Pressure

1 - Check gas line pressure with unit firing at maximum

rate. Maintain a minimum of 4.5 in. w.c. (1.12 kPa) for natural gas or 8.5 inches w.c. (2.11kPa) for LP/proĆ pane gas.

2 - After line pressure has been checked and adjusted,

check high heat regulator pressure. See figure30 for gas pressure adjustment screw location. High heat manifold pressure for natural and LP/propane gas is given in table 17.

Manifold Pressure Measurement & Adjustment

NOTE - Pressure test adaptor kit (10L34) is available from Lennox to facilitate manifold pressure measureĆ ment.

1 - Connect test gauge to outlet tap on gas valve. 2 - Disconnect pressure sensing hose from gas valve

and plug hose by covering opening with tape or equivalent. Leave barbed fitting on valve open to atĆ mosphere. See figure 31 for differential pressure switch circuitry on 75 kBtuh models. Only 75 kBtuh models are equipped with a second pressure switch. Other models have single pressure switch.

3 - Start unit on high heat and allow 5 minutes for unit to

reach steady state.

4 - While waiting for the unit to stabilize, notice the

flame. Flame should be stable and should not lift from burner. Natural gas should burn blue.

5 - After allowing unit to stabilize for 5 minutes, record

manifold pressure and compare to value given in table 17.

NOTE - Shut unit off and remove manometer as soon as an accurate reading has been obtained. Take care to replace pressure tap plug.

75 kBtuh DIFFERENTIAL PRESSURE SWITCH CIRCUITRY

LOW HEAT

DIFFERENTIAL

PRESSURE

SWITCH

TEE

HIGH HEAT

DIFFERENTIAL

PRESSURE

SWITCH

COMBUSTION

AIR PRESSURE

SENSING HOSE

COMBUSTION

AIR BLOWER

LEFT SIDE OF PRESSURE SWITCH = MORE NEGATIVE

RIGHT SIDE OF PRESSURE SWITCH = LESS NEGATIVE (Closer to Zero)

Honeywell PPS

Pressure Switch

Shown

BURNER

BOX

HOSE

BARB

BURNER

BOX

SENSING

HOSE

GAS

VALV E

SENSING

HOSE

GAS

VALV E

PRESSURE

SWITCH

SENSING

HOSE

FIGURE 31

NO T E - Dur ing this tes t procedure, the unit will be overĆ firing:

 Operate unit only long enough to obtain accurate

reading to prevent overheating heat exchanger.

 Attempts to clock gas valve during this procedure will

be inaccurate. Measure gas flow rate only during normal unit operation.

6 - When test is complete remove obstruction from hose

and return hose to gas valve barbed fitting.

Page 31

Page 32

High Altitude Information

Refer to table 17 for manifold pressure settings for instalĆ lations at altitudes from 0 to 7500 feet (0 to 2286 m).

NOTE - In Canada, certification for installations at elevaĆ tions over 4500 feet (1372 m) is the jurisdiction of local auĆ thorities.

The pressure switch(es) are factory-set and should not be adjusted. The -75 is equipped with both a high- and low-heat pressure switch. The -100 and -125 units have a single pressure switch.

Other Unit Adjustments

NOTE - Disconnect power to unit before making any adjustments.

Heat Anticipation Settings

Thermostat anticipator setting (if adjustable) should be set according to amps listed on wiring diagram on unit.

Flame Rollout Switch

Factory set: No adjustment necessary.

Limit Control

Factory set: No adjustment necessary.

Pressure Switches

Factory set: No adjustment is necessary.

Temperature Rise

Check temperature rise and, if necessary, adjust blower speed to maintain temperature rise within range shown on unit rating plate.

Electrical

1 - Check all wiring for loose connections.

2 - Check circuit breaker located on unit control box.

3 - Check for the correct voltage at the furnace (furnace

operating).

4 - Check amp-draw on the blower motor.

Motor Nameplate __________Actual__________.

NOTE - Do not secure electrical conduit directly to ductĆ ing or structure.

Electronic Ignition

The SureLight integrated control has an internal watchĆ guard feature. The feature serves as an automatic reset device for ignition controls locked out because the burner has failed to light. After one hour of continuous thermostat demand for heat, the watchguard will break and remake thermostat demand to the furnace and automatically reĆ set the control to relight the furnace.

Burner Flame

Start burner and allow to operate for a few minutes to esĆ tablish normal burning conditions. Check burner flame by observation. Flame should be predominantly blue and strong in appearance.

Check burner flame periodically to ensure proper operation.

Service

WARNING

Disconnect power before servicing unit.

CAUTION

Label all wires prior to disconnection when servicĆ ing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.

Annual Service

At the beginning of each heating season, system should be checked as follows by a qualified service technician:

Electrical

1 - Check all wiring for loose connections. 2 - Check circuit breaker located on unit control box. 3 - Check for the correct voltage at the furnace (furnace

operating).

4 - Check amp-draw on the blower motor.

Motor Nameplate_________Actual_________

5 - Check to see that heat (if applicable) is operating.

Blower

Check the blower wheels for debris and clean if necesĆ sary. The blower motors are prelubricated for extended bearing life. No further lubrication is needed.

Filters

1 - Filters must be cleaned or replaced when dirty to as-

sure proper furnace operation.

2 - Reusable foam filters used with the unit can be

washed with water and mild detergent.

3 - If replacement is necessary, order Lennox part no.

31J81 for 14 inches x 25 inches (356 x 635 mm) filĆ ter for G32V-75 units and P-8-7831 for 20 inches x 25 inches (508 x 635 mm) filter for G32V-100 and

-125 units.

Intake and Exhaust Lines

Check intake and exhaust lines and all connections for tightness and make sure there is no blockage. Also check condensate line for free flow during operation.

Insulation

Outdoor piping insulation should be inspected yearly for deterioration. If necessary, replace with same materials.

Winterizing and Condensate Trap Care

1 - Turn off power to unit. 2 - Have a shallow pan ready to empty condensate waĆ

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 botĆ tom of flue assembly. Replace boot and clamp.

4 - Remove boot from condensate trap and empty waĆ

ter. Inspect trap then replace boot.

Page 32

Page 33

Cleaning DuralokPlusTM Heat Exchanger

If cleaning the heat exchanger is necessary, follow the procedures below, and refer to figure 1 while you disasĆ semble the furnace. Place papers or protective covering in front of the furnace while you remove the heat exchangĆ er assembly.

1 - Turn off electrical and gas power supplies to furnace. 2 - Remove upper and lower furnace access panels. 3 - Remove four screws around air intake fitting and lift

intake pipe up and away.

4 - Loosen hose clamp securing top of flue transition to

bottom of flue collar. Remove screw securing flue collar to top cap and lift exhaust pipe and flue collar up and away.

5 - If electrical field makeĆup box is located inside the

unit, it must be removed. 6 - Remove gas supply line connected to gas valve. 7 - Mark all gas valve wires and disconnect them from

valve. Mark and remove wires from flame rollĆout

switch. 8 - Remove top cap of unit. 9 - Remove sensor wire from SureLight control. DisconĆ

nect 2Ćpin plug from the ignitor. 10 - Mark and disconnect pressure switch tubing from

both sides of the pressure switch(es). 11 - Loosen two screws holding gas manifold support at

vestibule panel. 12 - Remove four burner box screws at the vestibule panĆ

el and remove burner box and gas valve/manifold asĆ

sembly with bracket. 13 - Drain condensate trap. Disconnect condensate line

from the outside of unit. Remove condensate line

from condensate trap by turning the adapter fitting

counterclockwise. The fitting has standard right

hand threads. 14 - Disconnect the drain hose from the flue transition to

the elbow on the cold header (collector) box trap. 15 - Disconnect the 3Ćpin plug from the combustion air inĆ

ducer at the blower deck. Remove four screws from

combustion air inducer and remove flue transition

and inducer assembly from cabinet. Take care not to

lose the combustion air orifice. 16 - Mark and disconnect remaining wiring to heating

compartment components. 17 - Disengage strain relief bushing from blower deck.

Pull bushing and wiring into blower compartment. 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 pasĆ

sage. 20 - Remove screws along vestibule sides and bottom

which secure vestibule panel and heat exchanger

assembly to cabinet. Remove heat exchanger.

21 - Back wash heat exchanger with soapy water soluĆ

tion or steam. If steam is used it must be below

275°F (135°C).

22 - Thoroughly rinse and drain the heat exchanger.

Soap solution can be corrosive so take care that enĆ tire assembly is completely rinsed.

23 - Reinstall heat exchanger in the cabinet making sure

that the clamshells of the heat exchanger assembly are resting in the notches of the support located at the rear of the cabinet. This can be viewed by removĆ ing the indoor blower and examining through the blower opening.

24 - Resecure the supporting screws along the vestibule

sides and bottom to the cabinet.

25 - Reinstall cabinet screws on sides and front flange at

blower deck.

26- Reinstall the limit switch and pressure switches on

the vestibule panel.

27 - Route heating component wires through hole in

blower deck. Reinsert strain relief bushing. ReconĆ nect wires.

28 - Reinstall the combustion air inducer. Check to enĆ

sure that the plastic orifice in the inducer inlet has not fallen out. See figure 1. Reconnect the 3Ćpin plug to the wire harness. Reinstall the flue transition in the cabinet and reattach the drain tube. Route the drain tube below the combustion air inducer housing and to the elbow on the cold header (collector) box trap. See figure 31.

29 - Reconnect condensate line with adapter to condenĆ

sate trap. Use fresh Teflon tape to ensure a leak-free joint. Reconnect to condensate line outside of the unit.

30 - Reinstall the burner box. Tighten the screws holding

the support bracket. It is important that the glass fiber gasket not be damaged so it will provide a continuĆ ous seal between the burner box and the vestibule panel.

31 - Reconnect pressure switch tubing by connecting the

tubing from the burner box to the barbed fitting on the bottom and the tubing from the combustion air inducĆ

er to the barbed fitting on the top. See figure 31. 32 - Reconnect the sensor and ignitor wires. 33 - Reinstall top cap on unit. 34 - Reconnect wiring to gas valve. Brown wire to HI, yelĆ

low wire to C and orange wire to M. Reconnect wires

to flame rollĆout switch.

NOTE - Unit is polarityĆsensitive. 120V supply wiring

must be installed correctly.

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 makeĆup box if removed. 37 - Reinstall exhaust pipe/flue collar and secure flue colĆ

lar on the unit top cap using existing screw. Insert the

bottom of the flue collar into the top of the flue transiĆ

tion and tighten hose clamp.

Page 33

Page 34

38 - Reinstall intake pipe fitting on burner box with

screws. 39 - Replace both upper and lower access panels. 40 - Refer to instruction on verifying gas and electrical

connections when reĆestablishing supply. 41 - Following lighting instructions from installation

manual, light and operate unit for 5 minutes to ensure

heat exchanger is clean, dry and operating safely.

Cleaning the Burner Assembly

1 - Turn off electrical and gas power supplies to furnace.

Remove upper and lower furnace access panels. 2 - Disconnect the gas supply line from gas valve. DeĆ

pending on gas plumbing installation, the gas manĆ

ifold may move aside enough that breaking the union

may not be necessary. 3 - Remove five screws from edges of burner box cover. 4 - Loosen two screws on bottom of burner box front.

The cover has a key hole on each side, so screws do

not need to be removed. Remove the cover and set it

aside. 6 - Mark all gas valve wires and disconnect them from

valve. 7 - Mark and disconnect sensor wires from the burner

box at the ignition control. Disconnect 2-pin plug

from the ignitor at the burner box. 8 - Loosen two screws at the gas manifold support

bracket. 9 - Pull on the left side of the gas manifold and follow

with tension to the right side. The manifold support

bracket will be free of the mounting screws on the

vestibule panel. Set the gas manifold/gas valve asĆ

sembly aside. Take care not to damage foam gasĆ

kets on each end of the gas manifold. 10 - Using a 1/4 inch nut driver, remove the burner

mounting screws from underneath the burners. 11 - While supporting ignitor and sensor lines at the

grommet, grasp burners and simultaneously pull

burners and grommet out of the burner box. 12 - Remove ignitor and sensor bracket assemblies from

burners using a 1/4 inch nut driver to remove two

screws from each bracket. 13 - Clean burner by running a vacuum with a soft brush

attachment over face of burners. Use burner brush

to clean inside of burners. Visually inspect inside of

burners and crossovers for any blockage caused by

foreign matter. Remove any blockage.

14 - Reinstall ignitor and sensor bracket assemblies on

burners.

NOTE - Install the ignitor on the opposite side of the burner from the metal button protrusions. Screws that attached the ignitor bracket must be installed from the same side as the ignitor and through the bracket to engage in the smaller holes located in the burner. The correct burner orientation is with metal button protrusions always pointing up.

15 - Reinstall the burner ignitor assembly in the burner

box so that grommet groove fits back into sheet metĆ al notch and makes a good seal. The burners sit on top of the burner box flanges. Make certain that the screws underneath the box pass through the larger holes in the flange and engage in the smaller holes in the burner. Reinstall the two screws.

16 - Reinstall the gas manifold/gas valve assembly by

first inserting the right hand side of the gas manifold into the burner box. Swing left side of manifold into box while engaging support bracket to vestibule panĆ el screws. Make sure the foam gaskets are providing a seal around each end of the gas manifold. All gas orifices should be engaged. If at this point the burnĆ ers were mounted in the wrong holes, this needs to be corrected. The saddle brackets on the gas manĆ ifold should be flush with the front surfaces on the burner box sides.

17 - Inspect the dual layered metal pieces at the front lip

of the cover. These pieces must form a sandwich around the lip. Reinstall burner box cover.

18 - Reinstall the screws to secure the burner box cover.

Make sure screws are tight to ensure a leak tight burner box. Tighten the two screws underneath the box. Again, inspect the grommet to ensure a tight seal.

19 - Tighten the two screws holding the manifold bracket

to the vestibule panel.

20 - Reconnect gas valve wiring. Brown wire to HI yellow

wire to C and orange wire to M.

21 - Reinstall the 2Ćpin ignitor plug at the burner box. ReĆ

install sensor line to ignition control spade connector. 22 - Reconnect gas line to gas valve. 23 - Replace lower access panel. 24 - Following lighting instructions and gas line connecĆ

tion test procedures from installation manual. 25 - Replace upper access panel.

Page 34

Page 35

Repair Parts List

ONONON

Circuit board failure or control wired incorrectly. Check 24 and 115 volts to board.

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: G32VQ3-75-5.

Cabinet Parts

Cabinet cap Blower panel Upper access panel

Control Panel Parts

TwoĆstage, variable-speed SureLight control board Transformer

Circuit breaker Door interlock switch

Blower Parts

Blower wheel Motor Belly-band assembly Power choke Blower housing cutĆoff plate Blower housing

Heating Parts

Heat exchanger/coil assembly Gas manifold Main burner orifices Main burners TwoĆstage gas valve Ignitor Primary limit control Flame rollout switch Filter and filter rack assembly Flue transition Pressure switch - high fire (-75 only) Pressure switch - low fire Flame sensor Sight glass and grommet Rubber boot trap Foam manifold gaskets TwoĆspeed combustion air blower Condensate pipe plug and adapter Cold end header (collector) box

Integrated Control Board Diagnostic Codes

DIAGNOSTIC CODES

Diagnostic LEDs are labeled DS1 and DS2. See figure 29 for location of diagnostic LEDs.

DS1 DS2 DESCRIPTION

SIMULTANEOUS

SLOW FLASH

SIMULTANEOUS

FAST FLASH

SLOW FLASH ON

OFF SLOW FLASH

OFF FAST FLASH

ALTERNATING

SLOW FLASH

SLOW FLASH OFF Flame sensed without gas valve energized.

ON ON

OFF ON

FAST FLASH SLOW FLASH Main power polarity reversed. Switch line and neutral.

SLOW FLASH FAST FLASH Low flame signal. Measures below .7 microAmps. Replace flame sense rod.

ALTERNATING

FAST FLASH

NOTE - Slow flash rate equals 1 Hz (one flash per second). Fast flash rate equals 3 Hz (three flashes per second). Minimum flame sense current = 0.15-0.17 microAmps.

SIMULTANEOUS

SLOW FLASH

SIMULTANEOUS

FAST FLASH

ALTERNATING

SLOW FLASH

OFF

ALTERNATING

FAST FLASH

Power on - Normal operation. Also signaled during cooling and continuous fan.

Normal operation - signaled when heating demand initiated at thermostat.

Primary limit or rollout limit switch open. Limits must close within 3 minutes or unit goes into 1 hour Watchguard. Low-fire pressure switch open; OR: Blocked inlet/exhaust vent; OR: Low-fire pressure switch closed prior to activation of combustion air inducer.

High-fire pressure switch open (G32V-75 only); OR: Blocked inlet/exhaust vent; OR: High-fire pressure switch closed prior to activation of combustion air inducer.

Watchguard -- burners failed to ignite; OR limit open more than 3 minutes; OR lost flame sense 5 times in one heating cycle; OR pressure switch opened 5 times in one heating cycle.

Circuit board failure or control wired incorrectly. Check 24 and 115 volts to board.

The following conditions are sensed during the ignitor warm-up period only:

1) Improper main ground;

2) Broken ignitor; OR: Open ignitor circuit;

3) Line voltage below 75 volts. (If voltage lower than 75 volts prior to ignitor warmĆup, control will signal waiting on call from thermostat, and will not respond.

Page 35

Page 36

SureLight Troubleshooting: Heating Sequence of Operation

HEATING SEQUENCE OF OPERATION

NORMAL AND ABNORMAL HEATING MODE

POWER ON

CONTROL SELF-CHECK OKAY?

GAS VALVE OFF. COMBUSTION AIR INDUCER OFF. INDOOR BLOWER OFF. CHECK FOR BROKEN IGNITOR OR OPEN IGNITER CIRCUIT. DS 1 AND DS 2 ALTERNATING FAST FLASH.

GAS VALVE OFF. COMBUSTION AIR INDUCER OFF.

INDOOR BLOWER OFF. (RESET CONTROL BY

TURNING MAIN POWER OFF.) DS1 ON, DS2 ON

POLARITY OKAY?

YES

IS THERE A

PROPER GROUND?

YES

IS VOLTAGE

ABOVE 75 VOLTS?

YES

BURNER OFF?

(CONTINUOUS FLAME CHECK)

YES

NORMAL OPERATION:

DS 1 -- SIMULTANEOUS SLOW FLASH DS 2 -- SIMULTANEOUS SLOW FLASH

THERMOSTAT CALLS FOR HEAT:

DS 1 -- SIMULTANEOUS FAST FLASH DS 2 -- SIMULTANEOUS FAST FLASH

YES

PRIMARY LIMIT

SWITCH CLOSED?

YES

ROLLOUT SWITCH CLOSED?

YES

FIRST (LOW) STAGE PRESSURE SWITCH

CONTACTS OPEN?

YES

SECOND (HIGH) STAGE PRESSURE SWITCH

CONTACTS OPEN?

SIGNAL HOLDS UNTIL UNIT IS PROPERLY GROUNDED.

DS1 AND DS2 ALTERNATING FAST FLASH.

SIGNAL HOLDS UNTIL VOLTAGE RISES ABOVE 75 VOLTS.

DS1 AND DS2 ALTERNATING FAST FLASH.

GAS VALVE OFF. COMBUSTION AIR INDUCER ON.

INDOOR BLOWER ON HEATING SPEED.

INDOOR BLOWER ON. HAS PRIMARY LIMIT

60-MINUTE LIMIT WATCHGUARD MODE.

GAS VALVE OFF, COMBUSTION AIR INDUCER

OFF, INDOOR BLOWER OFF WITH DELAY.

DS1 AND DS2 ALTERNATING SLOW FLASH,

GAS VALVE OFF. COMBUSTION AIR INDUCER OFF.

HAS MANUAL ROLLOUT SWITCH(ES) BEEN

RESET (CLOSED) WITHIN 3 MINUTES?

GAS VALVE OFF. COMBUSTION AIR INDUCER OFF. INDOOR BLOWER OFF. CONTROL REMAINS UNTIL

PRESSURE SWITCH IS DETECTED OPEN.

ON/OFF LED OFF, HEAT LED OFF.

POLARITY REVERSED.

DS 1 -- FAST FLASH

DS 2 -- SLOW FLASH

DS1 SLOW FLASH, DS2 OFF,

ON/OFF LED OFF

COMBUSTION AIR INDUCER OFF.

RESET WITHIN 3 MINUTES?

DS1 SLOW FLASH, DS2 ON,

ON/OFF LED ON, HEAT LED ON.

ON/OFF LED OFF, HEAT LED ON.

DS1 SLOW FLASH, DS2 ON,

ON/OFF LED ON, HEAT LED ON.

DS1 OFF, DS2 SLOW FLASH,

YES

TWO-STAGE OR SINGLE-STAGE THERMOSTAT

CALL FOR HEAT

COMBUSTION AIR INDUCER ON LOW SPEED.

DS1 AND DS2 SIMULTANEOUS FAST FLASH

CONTINUED ON NEXT PAGE

COMBUSTION AIR INDUCER OFF.

GAS VALVE OFF.

INDOOR BLOWER OFF.

CONTROL WILL NOT ATTEMPT SECOND-STAGE

OPERATION DURING THIS HEAT DEMAND.

FIRST-STAGE OPERATION WILL BE ATTEMPTED.

DS1 OFF, DS2 FAST FLASH,

ON/OFF LED OFF, HEAT LED ON.

Page 36

Page 37

SureLight Troubleshooting: Heating Sequence of Operation (Continued)

HEATING SEQUENCE OF OPERATION

CONTINUED

FIRST-STAGE (LOW-FIRE) PRESSURE

SWITCH CLOSED WITHIN 2.5 MINUTES?

YES

15-SECOND COMBUSTION AIR INDUCER

PRE-PURGE INITIATED BY CLOSED FIRST-STAGE

PRESSURE SWITCH (or 15 SECOND

INTER-PURGE PERIOD.)

DS1 AND DS2 SIMULTANEOUS FAST FLASH.

IGNITOR WARM-UP (20 SECONDS)

DS1 AND DS2 SIMULTANEOUS FAST FLASH

IS VOLTAGE ABOVE 75 VOLTS?

YES

IS THERE A PROPER GROUND?

IS IGNITOR INTACT AND CONNECTED?

YES

THERMOSTAT CALLS FOR HEAT

DS1 AND DS2 SIMULTANEOUS FAST FLASH

(Refer to box A on previous page)

GAS VALVE OFF. COMBUSTION AIR INDUCER OFF.

INDOOR BLOWER OFF. UNIT WILL RETRY AFTER

5-MINUTE WAIT PERIOD.

DS1 OFF, DS2 SLOW FLASH,

ON/OFF LED OFF, HEAT LED OFF.

COMBUSTION AIR INDUCER OFF, IGNITER OFF.

SIGNAL HOLDS UNTIL VOLTAGE RISES ABOVE 75 VOLTS.

DS1 AND DS2 ALTERNATING FAST FLASH.

COMBUSTION AIR INDUCER OFF, IGNITER OFF.

SIGNAL HOLDS UNTIL UNIT IS PROPERLY GROUNDED.

DS1 AND DS2 ALTERNATING FAST FLASH.

COMBUSTION AIR INDUCER OFF, IGNITOR OFF.

SIGNAL HOLDS UNTIL IGNITOR IS REPLACED

OR RECONNECTED.

DS1 AND DS2 ALTERNATING FAST FLASH.

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 SENSED.

DS1 AND DS2 SIMULTANEOUS FAST FLASH.

YES

4-SECOND FLAME STABILIZATION PERIOD.

DS1 AND DS2 SIMULTANEOUS FAST FLASH.

FLAME RECTIFICATION CURRENT CHECK

CAN FLAME BE PROVEN WITHIN 4

SECONDS AFTER GAS VALVE OPENS?

(u0.15 microamps)

FLAME PRESENT?

YES

CONTINUED ON NEXT PAGE

GAS VALVE OFF. COMBUSTION AIR

INDUCER ON. INDOOR BLOWER OFF.

HAS CONTROL RESET IGNITION SEQUENCE

DS1 SLOW FLASH, DS2 FAST FLASH,

ON/OFF LED OFF, HEAT LED 0N.

HAS CONTROL FAILED TO SENSE

FLAME FOR FIVE CONSECUTIVE TRIES

DURING A SINGLE HEAT DEMAND?

YES

WATCHGUARD MODE. GAS VALVE OFF,

COMBUSTION AIR INDUCER OFF.

INDOOR BLOWER OFF.

DS1 AND DS2 ALTERNATING SLOW FLASH.

ON/OFF LED 0FF, HEAT LED OFF.

IS 60-MINUTE RESET PERIOD COMPLETE?

YES

FOUR (4) TIMES?

DS1 SLOW FLASH, DS2 FAST FLASH,

ON/OFF LED OFF, HEAT LED ON .

YES

Page 37

Page 38

SureLight Troubleshooting: Heating Sequence of Operation (Continued)

HEATING SEQUENCE OF OPERATION

CONTINUED

FLAME SIGNAL ABOVE

(u0.2 microamps)

YES

THERMOSTAT CALLS FOR HEAT.

DS1 AND DS2 SIMULTANEOUS FAST FLASH.

SEE BOX A.

LOW FLAME SIGNAL

(Does not affect control operation)

DS1 SLOW FLASH, DS2 FAST FLASH.

SINGLE-STAGE THERMOSTAT MODE

(E20 SET AT SINGLE")

YES

START SECOND-STAGE RECOGNITION

ON DELAY (10 OR 15 MINUTES).

DS1 AND DS2 SIMULTANEOUS FAST FLASH.

FIRST-STAGE (LOW FIRE)

PRESSURE SWITCH CLOSED?

YES

FIRST-STAGE HEAT DEMAND SATISFIED?

DS1 AND DS2 SIMULTANEOUS SLOW FLASH.

GAS VALVE OFF, COMBUSTION AIR INDUCER

OFF FOLLOWING POST PURGE.

INDOOR BLOWER OFF WITH DELAY

DS1 AND DS2 SIMULTANEOUS SLOW FLASH

SECOND-STAGE HEAT DEMAND.

SECOND-STAGE HEAT DEMAND REQUIRED?

DS1 AND DS2 SIMUTANEOUS SLOW FLASH.

SECOND STAGE PRESSURE SWITCH CLOSED?

ABNORMAL FLASH CODE.

NOTE - IF SECOND-STAGE PRESSURE SWITCH

WAS ORIGINALLY FOUND CLOSED,

ABNORMAL CODE WILL FLASH.

SECOND-STAGE 30-SECOND DELAY ON BEGINS.

DS1 AND DS2 SIMULTANEOUS FAST FLASH

SECOND-STAGE COMBUSTION AIR INDUCER

ON. SECOND-STAGE GAS VALVE ON. HIGH

HEAT INDOOR BLOWER SPEED ON.

DS1 AND DS2 SIMULTANEOUS FAST FLASH.

SECOND-STAGE PRESSURE SWITCH CLOSED

IN LESS THAN TEN (10) SECONDS?

DS1 AND DS2 SIMULTANEOUS FAST FLASH.

YES

ON/OFF LED ON.

YES

CONTINUED ON NEXT PAGE

YES

TWO STAGE THERMOSTAT MODE

(E20 SET AT TWO")

YES

45-SECOND INDOOR BLOWER ON DELAY BEGINS.

DS1 AND DS2 SIMULTANEOUS FAST FLASH.

YES

GAS VALVE OFF, COMBUSTION AIR INDUCER OFF, INDOOR BLOWER ON. DS1 SLOW FLASH, DS2 ON,

(Indoor blower on low speed during 3-minute period)

GAS VALVE OFF, COMBUSTION AIR INDUCER OFF,

DS1 AND DS2 ALTERNATING SLOW FLASH,

IS 60-MINUTE RESET PERIOD COMPLETE?

GAS VALVE OFF. COMBUSTION AIR INDUCER ON.

SECOND-STAGE PRESSURE SWITCH CLOSED

DS1 AND DS2 SIMULTANEOUS SLOW FLASH.

RETURNS TO FIRST-STAGE HEAT MODE WHICH CONTINUES UNTIL SECOND-STAGE PRESSURE

SWITCH CAN BE PROVEN or HEAT DEMAND IS

SATISFIED. FIVE (5) MINUTE WAIT PERIOD

INITIATED BEFORE RETRY. WERE 5 ATTEMPTS

DS1 AND DS2 SIMULTANEOUS SLOW FLASH.

YES

PRIMARY LIMIT AND

ROLLOUT SWITCH CLOSED?

ON/OFF LED ON, HEAT LED ON.

HAS PRIMARY LIMIT OR ROLLOUT

SWITCH CLOSED WITHIN 3 MINUTES?

LIMIT SWITCH WATCHGUARD MODE.

INDOOR BLOWER OFF WITH DELAY.

ON/OFF LED OFF, HEAT LED OFF.

INDOOR BLOWER OFF AFTER DELAY.

DS1 OFF, DS 2 SLOW FLASH,

ON/OFF LED OFF, HEAT LED ON.

AT BEGINNING OF HEAT DEMAND?

DS1 OFF, DS2 SLOW FLASH,

ON/OFF LED ON, HEAT LED ON.

SECOND STAGE HEAT DEMAND

MADE FOR SECOND-STAGE HEAT?

YES

NORMAL OPERATION.

YES

Page 38

Page 39

SureLight Troubleshooting: Heating Sequence of Operation (Continued)

HEATING SEQUENCE OF OPERATION

CONTINUED

DS1 AND DS2 SIMULTANEOUS SLOW FLASH.

SEE BOX A

NORMAL OPERATION

ARE PRIMARY LIMIT AND ROLLOUT

SECOND-STAGE (HIGH FIRE) HEAT

DS1 AND DS2 SIMULTANEOUS FAST FLASH.

SWITCH CLOSED?

YES

FIRST-STAGE (LOW FIRE) HEAT

PRESSURE SWITCH CLOSED?

YES

HEAT DEMAND SATISFIED?

YES

THERMOSTAT CALLS FOR HEAT

SEE BOX B

DS 1 AND DS 2 SIMULTANEOUS FAST FLASH.

GAS VALVE OFF. COMBUSTION AIR INDUCER OFF.

INDOOR BLOWER ON.

DS1 SLOW FLASH, DS2 ON,

ON/OFF LED ON, HEAT LED 0N.

HAS PRIMARY LIMIT OR ROLLOUT SWITCH

CLOSED WITHIN 3 MINUTES?

LIMIT SWITCH WATCHGUARD MODE. GAS VALVE

OFF. COMBUSTION AIR INDUCER OFF. INDOOR

BLOWER OFF WITH DELAY. IS 60-MINUTE RESET

PERIOD COMPLETE? DS SLOW FLASH, DS2 ON,

ON/OFF LED OFF, HEAT LED OFF.

GAS VALVE OFF, COMBUSTION AIR INDUCER

OFF AFTER 15 SECOND POST PURGE, INDOOR

BLOWER OFF AFTER DELAY.

DS1 OFF, DS2 FAST FLASH,

ON/OFF LED ON, HEAT LED ON.

RETURN TO HEAT DEMAND?

RETURN TO FIRST-STAGE HEAT MODE.

FIRST-STAGE CONTINUES UNTIL SECOND-

STAGE PRESSURE SWITCH CAN BE PROVEN

or HEAT DEMAND IS SATISFIED. A FIVE (5)

MINUTE WAIT PERIOD IS INITIATED BEFORE

RETRY. WERE 5 ATTEMPTS MADE FOR

SECOND-STAGE HEAT?

SEE BOX C

FIRST-STAGE HEAT DEMAND SATISFIED?

YES

SINGLE-STAGE THERMOSTAT MODE

(E20 SET AT SINGLE")

YES

HEAT DEMAND SATISFIED?

DS1 AND DS2

SIMULTANEOUS FAST FLASH.

YES

GAS VALVE OFF, COMBUSTION AIR

INDUCER OFF AFTER 5-SECOND LOW

SPEED POST PURGE PERIOD, INĆ

DOOR BLOWER OFF DELAY

INITIATED ON LOW HEAT SPEED.

DS1 AND DS2

SIMULTANEOUS FAST FLASH

DEMAND FOR HEAT SATISFIED.

POWER ON STAND BY.

DS1 AND DS2

SIMULTANEOUS SLOW FLASH

TWO STAGE THERMOSTAT MODE?

(E20 SET AT TWO")

YES

FIRST AND SECOND STAGE HEAT

DEMAND SATISFIED SIMULTANEOUSLY.

DS1 & DS2 SIMULTANEOUS FAST FLASH.

YES

GAS VALVE, COMBUSTION AIR INDUCER

AND INDOOR BLOWER RETURN TO FIRST-

DS1 AND DS2 SIMULTANEOUS FAST FLASH.

FIRST STAGE HEAT DEMAND SATISFIED?

GAS VALVE OFF. COMBUSTION AIR INDUCER

OFF AFTER 5-SECOND LOW SPEED POST-

PURGE PERIOD. INDOOR BLOWER OFF. DELAY INITIATED ON LOW HEAT SPEED.

DS1 & DS2 SIMULTANEOUS FAST FLASH.

Page 39

SECOND STAGE HEAT

DEMAND SASTISFIED?

DS1 AND DS2

SIMULTANEOUS FAST FLASH.

YES

STAGE OPERATION.

YES

Page 40

SureLight Troubleshooting: Cooling Sequence of Operation

COOLING SEQUENCE OF OPERATION

POWER ON

SIGNAL IMPROPER

GROUND AT DS.

SIGNAL HOLDS

UNTIL UNIT IS

PROPERLY

GROUNDED.

THERMOSTAT CALLS FOR FIRST-STAGE COOL.

INDOOR BLOWER ENERGIZED ON FIRST STAGE

FIRST-STAGE DEMAND FOR COOL SATISFIED?

THERMOSTAT CALLS FOR SECOND-STAGE COOL.

IS POLARITY REVERSED?

COMPRESSOR AND CONDENSER FAN

COOL SPEED AFTER 2 SECOND DELAY.

IS THERE

PROPER GROUND?

ENERGIZED.

YES

IS VOLTAGE

ABOVE 75 VOLTS?

YES

SIGNAL POLARITY REVERSED.

DS1 FAST FLASH, DS2 SLOW FLASH.

COMPRESSOR AND CONDENSER FAN DE-ENERGIZED.

LOW VOLTAGE SIGNAL AT DS HOLDS

UNTIL VOLTAGE RISES ABOVE 75 VOLTS.

INDOOR BLOWER DE-ENEGIZED.

INDOOR BLOWER RAMPS UP TO SECOND-STAGE COOL SPEED.

SECOND-STAGE DEMAND FOR COOL SATISFIED?

YES

UNIT RETURNS TO FIRST STAGE COOL

Page 40

Page 41

SureLight Troubleshooting: Continuous Fan Sequence of Operation

CONTINUOUS LOW SPEED FAN SEQUENCE OF OPERATION

MANUAL FAN SELECTION MADE AT THERMOSTAT.

AFTER 2 SECOND DELAY, INDOOR BLOWER IS

ENERGIZED ON CONTINUOUS FAN SPEED.

YES YES

THERMOSTAT CALLS FOR FIRST-STAGE HEAT.THERMOSTAT CALLS FOR FIRST STAGE COOL.

YES

INDOOR BLOWER RAMPS TO FIRST STAGE

COOLING SPEED AFTER A 2-SECOND DELAY.

AFTER 45-SECOND DELAY, INDOOR BLOWER

SWITCHES TO LOW HEAT SPEED.

YES

FIRST-STAGE COOL DEMAND SATISFIED?

SECOND STAGE COOL DEMAND

INDOOR BLOWER RAMPS TO SECOND

STAGE COOL SPEED

SECOND STAGE COOL DEMAND SATISFIED?

YES

INDOOR BLOWER RAMPS DOWN TO FIRST STAGE

COOL SPEED.

FIRST-STAGE HEAT DEMAND SATISFIED.

THERMOSTAT CALLS FOR SECOND-STAGE HEAT.

YES

INDOOR BLOWER SWITCHES TO HIGH HEAT SPEED

AFTER 30-SECOND RECOGNITION PERIOD.

YES

SECOND-STAGE HEAT DEMAND SATISFIED.

YES

INDOOR BLOWER RAMPS DOWN TO LOW

HEAT SPEED.

YES

Page 41

Page 42

G32V Start-Up & Performance Check List

Job Name

Job Location

Installer

Unit Model No.

Serial No.

Heating Section

Electrical Connections Tight?

Line Voltage

Blower Motor Amps

Fuel Type: Natural Gas?

Job No.

City

Technician

Blower Motor H.P.

Gas Piping Connections Tight & Leak-Tested?

LP/Propane Gas?

Date

State

Furnace Btu Input (High fire) Line Pressure

Low Fire Manifold Pressure

High Fire Manifold Pressure

Flue Connections Tight?

Combustion Gas Tested (high fire and low fire)?

Blower ON delay confirmed? (45 Seconds Fixed On)

Blower OFF Delay Setting (60, 90, 120 or 180)?

Filter Clean & Secure?

w.c. - Nat.:

External Static Pressure? (0.8 maximum)

w.c. - LP/Propane

Proper Draft?

Temperature Rise

Thermostat

Heat Anticipator Setting? Thermostat Level?

Page 42

Lennox G32V3-75, G32V5-100, G32V5-125 Installation Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual