Lennox G43UF−36C−090, G43UF−24B−045, G43UF−36C−090H, G43UF−48C−090, G43UF−48C−110 Installation Instructions Manual

...

Download

Page 1

03/10

*2P0310*

506497−01

*P506497-01*

E 2010 Lennox Industries Inc.

Dallas, Texas, USA

UPFLOW

INSTALLATION INSTRUCTIONS G43UF

MERIT SERIES GAS FURNACE UPFLOW AIR DISCHARGE

506497−01 03/2010 Supersedes 505,064M

THIS MANUAL MUST BE LEFT WITH THE

HOMEOWNER FOR FUTURE REFERENCE

This a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be alert to the potential for personal injury or death.

CAUTION

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

WARNING

Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation and service must be performed by a licensed professional installer (or equivalent), service agency or the gas supplier.

Table of Contents

Unit Dimensions 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts Identification 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Shipping and Packing List 4. . . . . . . . . . . . . . . . . . . . . . .

Safety Information 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Use of Furnace as Constrction Heater 5. . . . . . . . . . . .

General 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Combustion, Dilution & Ventilation Air 6. . . . . . . . . . . . .

Installation − Setting Equipment 8. . . . . . . . . . . . . . . . . .

Filters 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Duct System 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pipe & Fittings Specifications 12. . . . . . . . . . . . . . . . . . .

Vent Piping Guidelines 14. . . . . . . . . . . . . . . . . . . . . . . . .

Joint Cementing Procedure 15. . . . . . . . . . . . . . . . . . . . .

Venting Practices 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gas Piping 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Unit Start−Up 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Gas Pressure Adjustment 35. . . . . . . . . . . . . . . . . . . . . .

High Altitude Information 36. . . . . . . . . . . . . . . . . . . . . . .

Testing for Venting and Combustion Air 37. . . . . . . . . .

Other Unit Adjustments 38. . . . . . . . . . . . . . . . . . . . . . . .

Blower Performance Data 39. . . . . . . . . . . . . . . . . . . . . .

Service 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Planned Service 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Ignition Control Board Diagnostic Codes 43. . . . . . . . .

Troubleshooting 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Repair Parts List 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Vent Pipe Sizing Worksheet 48. . . . . . . . . . . . . . . . . . . .

Start−Up & Performance Check List 49. . . . . . . . . . . . . .

Litho U.S.A.

Page 2

Unit Dimensions − inches (mm)

*Bottom Return

Air Opening

*Bottom Return

Air Opening

ELECTRICAL INLET

(Either Side)

SUPPLY AIR

OPENING

AIR FLOW

FRONT VIEW SIDE VIEW

TOP VIEW

B 9/16 (14)

3/4 (19)

28−1/2

(724)

19−7/16

(494)

23−1/2

(597) 4−1/4 (108)

11−5/8 (295)

Right

9−3/4 (248)

Left

4−7/8 (124) Right

2−1/4 (57) Left

(1016)

(102)

1−15/16 (49)

(584)

14**

(356)

9/16

(14)

(406)

14−3/4

(375)

5/8 (16)

23-3/4 (603)

25 (635)

GAS PIPING INLET

(Either Side)

EXHAUST AIR OUTLET

(Either Side)

CONDENSATE

TRAP CONNECTION

(Either Side)

2−1/2

(64)

18-3/4 (476)

OPTIONAL

EXTERNAL

SIDE RETURN

AIR FILTER KIT

(Either Side)

OPTIONAL

EXTERNAL

SIDE RETURN

AIR FILTER KIT

(Either Side)

*OPTIONAL

RETURN CUTOUT

(Either Side)

Optional External Side Return Air Filter Kit is not for use

with the optional RAB Return Air Base.

*NOTE − 60C and 60D size units installed in upflow applications that require air volumes over 1800 cfm (850 L/s) must have one of the following:

1. Single side return air with transition, to accommodate 20 x 25 x 1 in. (508 x 635 x 25 mm) air filter. Required to maintain proper air velocity.

2. Single side return air with optional RAB Return Air Base

3. Bottom return air.

4. Return air from both sides.

5. Bottom and

one side return air.

Refer to Engineering Handbook for additional information.

**Consider sizing requirements for optional IAQ equipment before cutting side return opening.

COMBUSTION AIR INTAKE

(Either Side)

6−1/2 (165)

4−1/8 (103)

6−3/4 (171)

3−1/8

(79)

Model No.

A B C

in. mm in. mm in. mm

G43UF−24B−045 G43UF−24B−070 G43UF−36B−070

17−1/2 446 16−3/8 416 16 406

G43UF−36C−090 G43UF−36C−090H G43UF−48C−090 G43UF−48C−110 G43UF−48C−110H G43UF−60C−110

21 533 19−7/8 504 19−1/2 495

G43UF−60D−135 24−1/2 622 23−3/8 546 23 584

Page 3

Parts Arrangement

G43UF PARTS IDENTIFICATION

FIGURE 1

TOP CAP

CABINET

BURNER BOX

ASSEMBLY

SIGHT

GLASS

DuralokPlus

HEAT EXCHANGER

ASSEMBLY

CONDENSER COIL

CONTROL BOX

DOOR

INTERLOCK

SWITCH

COLD HEADER

(COLLECTOR)

BOX

COMBUSTION AIR

INDUCER

BLOWER

ACCESS

DOOR

BURNER ACCESS

PANEL

FLUE

COLLAR

COMBUSTION

AIR PRESSURE

PROVE SWITCH

PRIMARY LIMIT

WARM HEADER

(COLLECTOR)

BOX

GAS VALVE

AND MANIFOLD

BLOWER

ASSEMBLY

Page 4

G43UF Gas Furnace

The G43UF Category IV gas furnace is shipped ready for installation in the upflow position. The furnace is shipped with the bottom panel in place. The bottom panel must be removed if the unit is to be installed in upflow applications with bottom return air.

The G43UF can be installed as either a Direct Vent or a Non−Direct Vent gas central furnace.

The furnace is equipped for installation in natural gas applications. A conversion kit (ordered separately) is required for use in propane/LP gas applications.

NOTE − In Direct Vent installations, combustion air is taken from outdoors and flue gases are discharged outdoors. In Non−Direct Vent installations, combustion air is taken from indoors and flue gases are discharged outdoors. See figure 2 for applications involving roof termination.

FIGURE 2

DIRECT VENT INSTALLATION NON−DIRECT VENT

INSTALLATION

EXHAUST OUTLET

COMBUSTION AIR INTAKE OUTSIDE OF HOUSE

CONDENSATE

DRAIN

EXHAUST OUTLET

G43UF

COMBUSTION

AIR INTAKE INSIDE

OF HOUSE

G43UF

CONDENSATE

DRAIN

Shipping and Packing List

Package 1 of 1 contains

1 − Assembled G43UF unit

1 − Bag assembly containing the following:

3 − Screws

3 − Wire nuts

1 − Snap bushing

1 − Snap plug

1 − Wire tie

1 − Condensate trap

1 − Condensate trap cap

2 − 2" diameter vent / intake plugs

1 − 3" diameter cabinet plug (intake)

1 − 2" diameter debris screen

NOTE − G43UF−48C−110, G43UF−110H and G43UF−60C−110 units also include a 2" diameter PVC street elbow, which is shipped on the blower deck in the heating compartment. G43UF−60D−135 units are shipped with a 3" to 2" PVC reducing elbow.

Canadian Installations Only − Replace the provided 2" street elbow shipped with the G43UF−110, G43UF−110H and G43UF−60C−110 units with 2" street elbow Y0162. Replace the provided 3" X 2" reducing elbow shipped with the G43UF−60D−135 units with 3" X 2" reducing elbow 40W22. Y0162 and 40W22 meet B149 vent requirements.

DANGER

Danger of explosion.

There are circumstances in which odorant used with LP/propane gas can lose its scent. In case of a leak, LP/propane gas will settle close to the floor and may be difficult to smell. An LP/propane leak detector should be installed in all LP applications.

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

The following items may also be ordered separately: 1 − Thermostat 1 − Propane/LP changeover kit

Safety Information

WARNING

CAUTION

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

Use only the type of gas approved for use with this furnace. Refer to unit nameplate.

G43UF units are CSA International certified to ANSI Z21.47 and CSA 2.3 standards.

In the USA, installation of gas furnaces must conform with local building codes. In the absence of local codes, units must be installed according to the current National Fuel Gas Code (ANSI-Z223.1/NFPA 54). The National Fuel Gas Code is available from the following address:

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

In Canada, installation must conform with current National Standard of Canada CSA-B149 Natural Gas and Propane Installation Codes, local plumbing or waste water codes and other applicable local codes.

Page 5

In order to ensure proper unit operation in non−direct vent applications, combustion and ventilation air supply must be provided according to the current National Fuel Gas Code or CSA-B149 standard.

This furnace is CSA International certified for installation clearances to combustible material as listed on the unit nameplate and in the table in figure 8. Accessibility and service clearances must take precedence over fire protection clearances.

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

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 according to recommended good practice requirements and current National Fuel Gas Code or CSA B149 standards.

NOTE − Furnace must be adjusted to obtain a temperature rise within the range specified on the unit nameplate. Failure to do so may cause erratic limit operation and premature heat exchanger failure.

This G43UF furnace must be installed so that its electrical components are protected from water.

When this 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 compartment. With a parallel flow arrangement, a damper (or other means to control the flow of air) must adequately prevent chilled air from entering the furnace. If the damper 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, this furnace must be electrically grounded according to local codes. In addition, in the United States, installation must conform with the current National Electric Code, ANSI/NFPA No. 70. The National Electric Code (ANSI/NFPA No. 70) is available from the following address:

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.

NOTE − This furnace is designed for a minimum continuous return air temperature of 60°F (16°C) or an intermit-

tent operation down to 55°F (13°C) dry bulb for cases where a night setback thermostat is used. Return air temperature must not exceed 85°F (29°C) dry bulb.

The G43UF furnace may be installed in alcoves, closets, attics, basements, garages, and utility rooms in the upflow position.

This furnace design has not been CSA certified for installation in mobile homes, recreational vehicles, or outdoors.

Never use an open flame to test for gas leaks. Check all connections using a commercially available soap solution made specifically for leak detection.

Use of Furnace as Construction Heater

Lennox does not recommend the use of G43UF units as a construction heater during any phase of construction. Very low return air temperatures, harmful vapors and operation of the unit with clogged or misplaced filters will damage the unit.

G43UF units may be used for heating of buildings or structures under construction, if the following conditions are met:

D The vent system must be permanently installed per

these installation instructions.

D A room thermostat must control the furnace. The use of

fixed jumpers that will provide continuous heating is not allowed.

D The return air duct must be provided and sealed to the

furnace.

D Return air temperature range between 60°F (16°C) and

80°F (27°C) must be maintained.

D Air filters must be installed in the system and must be

maintained during construction.

D Air filters must be replaced upon construction comple-

tion.

D The input rate and temperature rise must be set per the

furnace rating plate.

D One hundred percent (100%) outdoor air must be pro-

vided for combustion air requirements during construction. Temporary ducting may supply outdoor air to the furnace. Do not connect duct directly to the furnace. Size the temporary duct following these instructions in section for Combustion, Dilution and Ventilation Air in a confined space with air from outside.

D The furnace heat exchanger, components, duct system,

air filters and evaporator coils must be thoroughly cleaned following final construction clean−up.

D All furnace operating conditions (including ignition, in-

put rate, temperature rise and venting) must be verified according to these installation instructions.

Page 6

General

These instructions are intended as a general guide and do not supersede local codes in any way. Consult authorities having jurisdiction before installation.

In addition to the requirements outlined previously, the following general recommendations must be considered when installing a G43UF furnace:

• Place the furnace as close to the center of the air distribution system as possible. The furnace should also be located close to the chimney or vent termination point.

• When the furnace is installed in non−direct vent applications, do not install the furnace where drafts might blow directly into it. This could cause improper combustion and unsafe operation.

• When the furnace is installed in non−direct vent applications, do not block the furnace combustion air opening with clothing, boxes, doors, etc. Air is needed for proper combustion and safe unit operation.

• When the furnace is installed in an attic or other insulated space, keep insulation away from the furnace.

• When the furnace is installed in an unconditioned space, consider provisions required to prevent freezing of condensate drain system.

CAUTION

G43UF unit should not be installed in areas normally subject to freezing temperatures.

WARNING

Product contains fiberglass wool.

Disturbing the insulation in this product during installation, maintenance, or repair will expose you to fiberglass wool. 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

Combustion, Dilution & Ventilation Air

If the G43UF is installed as a Non−Direct Vent Furnace, follow the guidelines in this section.

NOTE − In Non−Direct Vent installations, combustion air is taken from indoors and flue gases are discharged out− doors.

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 substances 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

In the past, there was no problem in bringing in sufficient outdoor air for combustion. Infiltration provided all the air that was needed. In today’s homes, tight construction practices make it necessary to bring in air from outside for combustion. Take into account that exhaust fans, appliance vents, chimneys, and fireplaces force additional air that could be used for combustion out of the house. Unless outside air is brought into the house for combustion, negative pressure (outside pressure is greater than inside pressure) will build to the point that a downdraft can occur in the furnace vent pipe or chimney. As a result, combustion gases enter the living space creating a potentially dangerous situation.

In the absence of local codes concerning air for combus− tion and ventilation, use the guidelines and procedures in this section to install G43UF furnaces to ensure efficient and safe operation. You must consider combustion air needs and requirements for exhaust vents and gas pip− ing. A portion of this information has been reprinted with permission from the National Fuel Gas Code (ANSI− Z223.1/NFPA 54). This reprinted material is not the complete and official position of the ANSI on the referenced subject, which is represented only by the standard in its entirety.

In Canada, refer to the CSA B149 installation codes.

CAUTION

Do not install the furnace in a corrosive or contaminated atmosphere. Meet all combustion and ventilation air requirements, as well as all local codes.

Page 7

All gas-fired appliances require air for the combustion process. If sufficient combustion air is not available, the furnace or other appliance will operate inefficiently and unsafely. Enough air must be provided to meet the needs of all fuel−burning appliances and appliances such as exhaust fans which force air out of the house. When fireplaces, exhaust fans, or clothes dryers are used at the same time as the furnace, much more air is required to ensure proper combustion and to prevent a downdraft. Insufficient air causes incomplete combustion which can result in carbon monoxide.

In addition to providing combustion air, fresh outdoor air dilutes contaminants in the indoor air. These contaminants may include bleaches, adhesives, detergents, solvents and other contaminants which can corrode furnace components.

The requirements for providing air for combustion and ventilation depend largely on whether the furnace is installed in an unconfined or a confined space.

Unconfined Space

An unconfined space is an area such as a basement or large equipment room with a volume greater than 50 cubic feet (1.42 m

) per 1,000 Btu (.29 kW) per hour of the combined input rating of all appliances installed in that space. This space also includes adjacent rooms which are not separated by a door. Though an area may appear to be unconfined, it might be necessary to bring in outdoor air for combustion if the structure does not provide enough air by infiltration. If the furnace is located in a building of tight construction with weather stripping and caulking around the windows and doors, follow the procedures in the air from outside section.

Confined Space

A confined space is an area with a volume less than 50 cubic feet (1.42 m

) per 1,000 Btu (.29 kW) per hour of the com− bined input rating of all appliances installed in that space. This definition includes furnace closets or small equipment rooms.

When the furnace is installed so that supply ducts carry air circulated by the furnace to areas outside the space containing the furnace, the return air must be handled by ducts which are sealed to the furnace casing and which terminate outside the space containing the furnace. This is especially important when the furnace is mounted on a platform in a confined space such as a closet or small equipment room. Even a small leak around the base of the unit at the platform or at the return air duct connection can cause a potentially

dangerous negative pressure condition. Air for combustion and ventilation can be brought into the confined space either from inside the building or from outside.

Air from Inside

If the confined space that houses the furnace adjoins a space categorized as unconfined, air can be brought in by providing two permanent openings between the two spaces. Each opening must have a minimum free area of 1 square inch (645 mm

) per 1,000 Btu (.29 kW) per hour of total input rating of all gas−fired equipment in the confined space. Each opening must be at least 100 square inches (64516 mm

). One opening shall be within 12 inches (305 mm) of the top of the enclosure and one opening within 12 inches (305 mm) of the bottom. See figure 3.

FIGURE 3

EQUIPMENT IN CONFINED SPACE − ALL AIR FROM INSIDE

OPENINGS

(To Adjacent

Unconfined

Space)

NOTE − Each opening shall have a free area of at least one square inch per 1,000 Btu (645mm

per .29kW) per hour of the total input rating of all equipment in the enclosure, but not less than 100 square inches (64516mm.

2).

ROOF TERMINATED

EXHAUST PIPE

SIDE WALL

TERMINATED EX-

HAUST PIPE (ALTER-

NATE LOCATION)

G43UF

Air from Outside

If air from outside is brought in for combustion and ventilation, the confined space shall be provided with two permanent openings. One opening shall be within 12" (305mm) of the top of the enclosure and one within 12" (305mm) of the bottom. These openings must communicate directly or by ducts with the outdoors or spaces (crawl or attic) that freely communicate with the outdoors or indirectly through vertical ducts. Each opening shall have a minimum free area of 1 square inch per 4,000 Btu (645mm

per 1.17kW) per hour of total input rating of all equipment in the enclosure. When communicating with the outdoors through horizontal ducts, each opening shall have a minimum free area of 1 square inch per 2,000 Btu (645mm

per .59kW) per total input rating of all equipment in the enclosure (See figure 4).

Page 8

FIGURE 4

EQUIPMENT IN CONFINED SPACE − ALL AIR FROM OUTSIDE

(Inlet Air from Crawl Space and Outlet Air to Ventilated Attic)

NOTE−The inlet and outlet air openings shall each have a free area of at least one square inch per 4,000 Btu (645mm

per 1.17kW) per

hour of the total input rating of all equipment in the enclosure.

OUTLET

AIR

INLET

AIR

VENTILATION

LOUVERS

(For unheated

crawl space)

G43UF

ROOF TERMINATED

EXHAUST PIPE

VENTILATION LOUVERS

(Each end of attic)

SIDE WALL

TERMINATED

EXHAUST PIPE

(ALTERNATE

LOCATION)

If air from outside is brought in for combustion and ventilation, the confined space must have two permanent openings. One opening shall be within 12 inches (305 mm) of the top of the enclosure and one opening within 12 inches (305 mm) of the bottom. These openings must communicate directly or by ducts with the outdoors or spaces (crawl or attic) that freely communicate with the outdoors or indirectly through vertical ducts. Each opening shall have a minimum free area of 1 square inch (645 mm

) per 4,000 Btu (1.17 kW) per hour of total input rating of all equipment in the enclosure. See figures 4 and 5. When communicating with the outdoors through horizontal ducts, each opening shall have a minimum free area of 1 square inch (645 mm

) per 2,000 Btu (.56 kW) per total input rating of all

equipment in the enclosure. See figure 6. When ducts are used, they shall be of the same cross−sec-

tional area as the free area of the openings to which they connect. The minimum dimension of rectangular air ducts shall be no less than 3 inches (75 mm). In calculating free area, the blocking effect of louvers, grilles, or screens must be considered. If the design and free area of protective covering is not known for calculating the size opening required, it may be assumed that wood louvers will have 20 to 25 percent free area and metal louvers and grilles will have 60 to 75 percent free area. Louvers and grilles must be fixed in the open position or interlocked with the equipment so that they are opened automatically during equipment operation.

FIGURE 5

EQUIPMENT IN CONFINED SPACE − ALL AIR FROM OUTSIDE

(All Air Through Ventilated Attic)

NOTE−The inlet and outlet air openings shall each have a free area of at least one square inch per 4,000 Btu (645mm

per 1.17kW) per hour

of the total input rating of all equipment in the enclosure.

OUTLET

AIR

VENTILATION LOUVERS

(Each end of attic)

INLET AIR

(Ends 12" above

bottom)

ROOF TERMINATED

EXHAUST PIPE

SIDE WALL

TERMINATED

EXHAUST PIPE

(ALTERNATE

LOCATION)

G43UF

FIGURE 6

EQUIPMENT IN CONFINED SPACE −

ALL AIR FROM OUTSIDE

OUTLET AIR

INLET AIR

NOTE−Each air duct opening shall have a free area of at least one square inch per 2,000 Btu (645mm

per .59kW) per hour of the total

input rating of all equipment in the enclosure. If the equipment room is located against an outside wall and the air openings communicate directly with the outdoors, each opening shall have a free area of at least 1 square inch per 4,000 Btu (645mm

per 1.17kW) per

hour of the total input rating of all other equipment in the enclosure.

ROOF TERMINATED

EXHAUST PIPE

SIDE WALL

TERMINATED

EXHAUST PIPE

(ALTERNATE

LOCATION)

G43UF

Installation − Setting Equipment

WARNING

Do not install the furnace on its front or its back. Do not connect the return air ducts to the back of the furnace. Doing so will adversely affect the operation of the safety control devices, which could result in personal injury or death.

Page 9

The G43UF gas furnace can be installed as shipped in the upflow position only. Refer to figure 8 for clearances. Select a location that allows for the required clearances that are listed on the unit nameplate. Also consider gas supply connections, electrical supply, vent connection, condensate trap and drain connections, and installation and service clearances [24 inches (610 mm) at unit front]. The unit must be level from front to back and side

to side. The unit may be tilted slightly (maximum 1/2 in.) from back to front to aid in the draining of the heat exchanger. See figure 7.

FIGURE 7

FRONT VIEW SIDE VIEW

AIR FLOW

UNIT

FRONT

1/2"

max.

UNIT SHOULD BE LEVEL FROM LEFT TO RIGHT BUT MAY BE

TILTED SLIGHTLY (MAX. 1/2") FROM BACK TO FRONT TO AID IN THE DRAINING OF THE HEAT EXCHANGER.

NOTE − 1/3 hp blower motors are equipped with four flexible mounting legs, and 1/2 hp blower motors are equipped with three flexible legs and one rigid leg. The rigid leg is equipped with a shipping bolt and a flat white plastic washer (rather than the rubber mounting grommet used with a flexible mounting leg). The bolt and washer must be re- moved before the furnace is placed into operation. After the bolt and washer have been removed, the rigid leg will not touch the blower housing.

NOTE − G43UF−60D−135 units are equipped with a shipping pad under the blower housing. Remove the shipping pad prior to operation.

Allow for clearances to combustible materials as indicated on the unit nameplate. Minimum clearances for closet or alcove installations are shown in figure 8.

WARNING

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

WARNING

Improper installation of the furnace can result in personal injury or death. Combustion and flue products must never be allowed to enter the return air system 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 plenum. A door must never be used 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 heating devices such as a fireplace or stove, etc. Fire, explosion, carbon monoxide poisoning, personal injury and/or property damage could result.

Installation Clearances

Top

Bottom (Floor)

Left Side

Right Side

Top/Plenum 1 in. (25 mm)

*Front 0

Back 0

Sides 0†

Vent 0

Floor 0‡

*Front clearance in alcove installation must be 24 in. (610 mm). Maintain a minimum of 24 in. (610 mm) for front service access. †Allow proper clearances to accommodate condensate trap and vent pipe installation. ‡For installations on a combustible floor, do not install the furnace directly on carpeting, tile or other combustible materials other than wood flooring.

FIGURE 8

Return Air Guidelines

Return air can be brought in through the bottom or either side of the furnace installed in an upflow application. If the furnace is installed on a platform with bottom return, make an airtight seal between the bottom of the furnace and the platform to ensure that the furnace operates properly and safely. The furnace is equipped with a removable bottom panel to facilitate installation.

Page 10

Markings are provided on both sides of the furnace cabinet for installations that require side return air. Cut the furnace cabinet at the maximum dimensions shown on page 2.

NOTE − When air volumes over 1800 cfm (850 L/s) are required with 60C or 60D models in an upflow application, the following return air options are available:

1 − Return air from single side with transition which will

accommodate 20 x 25 x 1 in. (508 x 635 x 25 mm) air filter. (Required to maintain proper air velocity.) See figure 9.

2 − Return air from single side with optional RAB Return

Air Base. See figure 10.

3 − Return air from bottom.

4 − Return air from both sides.

5 − Return air from bottom and

one side.

Refer to Engineering Handbook for additional information.

G43UF applications which include side return air and a condensate trap installed on the same side of the cabinet require either a return air base or field−fabricated transition to accommodate an optional IAQ accessory taller than 14−1/2".

Side Return Air

(with transition and filter)

FIGURE 9

Return Air

Plenum

Transition

20" X 25" X 1"

(508mm X635mm X 25mm)

Air Filter

FIGURE 10

Optional Return Air Base

NOTE− Optional Side Return Air Filter Kits are not for use with RAB Return Air Base.

Both the unit return air opening and the base return air opening must be covered by a single plenum or IAQ cabinet. Minimum unit side return air opening dimensions for units requiring 1800 cfm or more of air (W x H): 23 x 11 in. (584 x 279 mm). The opening can be cut as needed to accommodate plenum or IAQ cabinet while maintaining dimensions shown. Side return air openings must be cut in the field. There are cutting guides stenciled on the cabinet for the side return air opening. The size of the opening must not extend beyond the markings on the furnace cabinet.

To minimize pressure drop, the largest opening height possible (up to 14 inches) is preferred.

NOTE− Optional Side Return Air Filter Kits are not for use with RAB Return Air Base.

Unit side return air

Opening

FRONT VIEW

SIDE VIEW

27−5/8 (702)

(102)

23 (584) Overall

(Maximum)

OPTIONAL RAB

RETURN AIR BASE

23 (584)

7−1/4 (184)

7/8

(22)

3/4

(19)

22−7−16

(570)

Overall

(Maximum)

SIDE RETURN

AIR OPENINGS

(Either Side)

FURNACE

FRONT

(356)

AIR FLOW

5−5/8 (143)

Minimum 11 (279)

Maximum

14 (356)

21 (533) RAB−C (98M58)

24−1/2 (622) RAB−D (98M59)

17−1/2 (446) RAB−B (98M60)

Page 11

Removing the Bottom Panel

FIGURE 11

Screw

Bottom Panel

Bottom Cap

Removing the Bottom Panel

Remove the two screws that secure the bottom cap to the furnace. Pivot the bottom cap down to release the bottom panel. Once the bottom panel has been removed, reinstall the bottom cap. See figure 11.

FIGURE 12

1−3/4

(44)

1−3/4

(44)

3/8

(10)

1−3/4 (44)

3/8

(10)

3/8

(10)

3/8

(10)

1−3/4

(44)

Leveling Bolt Installation

Leveling Bolt

Locations

Leveling Bolt

Locations

Inches (mm)

Furnace Front

Furnace

Bottom

Leveling an Upflow Unit

When the side return air inlets are used in an upflow application, it may be necessary to install leveling bolts on the bottom of the furnace. Use field−supplied corrosion−resistant 5/16 inch machine bolts (4) and nuts (8). See figure 12.

NOTE − The maximum length of the bolt is 1−1/2 inches.

1 − Lay the furnace on its back and drill a 5/16 inch diame-

ter hole in each corner of the furnace’s bottom. See figure 12 for the correct location of the holes. Drill through the bottom panel and the bottom flange of the cabinet.

2 − Install one bolt and two nuts into each hole. Screw the

first nut onto a bolt and then insert the bolt into a hole. A flat washer may be added between the nut and the bottom of the unit.

3 − Screw another nut onto the bolt on the inside of the fur-

nace base. A flat washer may be added between the nut and the bottom of the unit.

4 − Adjust the outside nut to the appropriate height and

tighten the inside nut to secure the arrangement.

NOTE − The unit may be tilted back−to−front a maximum of 1/2". This will ensure proper draining of the heat exchanger.

Filters

This unit is not equipped with a filter or rack. A field−provided filter is required for the unit to operate properly. Table 1 lists recommended filter sizes. A filter must be in place whenever the unit is operating.

TABLE 1

Furnace

Cabinet Width

Filter Size

Side Return Bottom Return

17−1/2" 16 X 25 X 1 (1) 16 X 25 X 1 (1)

21" 16 X 25 X 1 (1) 20 X 25 X 1 (1)

24−1/2" 16 X 25 X 1 (2) 24 X 25 X 1 (1)

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.

NOTE − Operation of this furnace in heating mode (indoor blower operating at selected heating speed) with an external static pressure which exceeds 0.5 inches w.c. may result in erratic limit operation.

Supply Air Plenum

If the furnace is installed without a cooling coil, a removable access panel should be installed in the supply air duct. The access panel should be large enough to permit inspection (by reflected light) of the heat exchanger for leaks after the furnace is installed. The furnace access panel must always be in place when the furnace is operating and it must not allow leaks into the supply air duct system.

Page 12

Return Air Plenum

NOTE − Return air must not be drawn from a room where this furnace, or any other gas−fueled appliance (i.e., water heater), or carbon monoxide− producing device (i.e., wood fireplace) is installed.

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 throughout the house by the furnace duct system.

Return air can be brought in through the bottom or either side of the furnace. If a furnace with bottom return air is installed on a platform, make an airtight seal between the bottom of the furnace and the platform to ensure that the unit operates properly and safely. Use fiberglass sealing strips, caulking, or equivalent sealing method between the plenum and the furnace cabinet to ensure a tight seal. If a filter is installed, size the return air duct to fit the filter frame.

Pipe & Fittings Specifications

All pipe, fittings, primer and solvent cement must conform with American National Standard Institute and the American Society for Testing and Materials (ANSI/ASTM) standards. 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, stratification, or separation that cannot be removed by stirring. Refer to the table 2 below for approved piping and fitting materials.

CAUTION

Solvent cements for plastic pipe are flammable liquids 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 contact of cement with skin and eyes.

TABLE 2

PIPING AND FITTINGS SPECIFICATIONS

PIPE & FITTING MATERIAL

ASTM

SPECIFICATION

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 or SDR−26 PVC (Pipe) D2241

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

Schedule 40 ABS Cellular Core DWV (Pipe) F628

Schedule 40 ABS (Pipe) D1527

Schedule 40 ABS (Fittings) D2468

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

D2661

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

D2665

PRIMER & SOLVENT CEMENT

ASTM

SPECIFICATION

PVC & CPVC Primer F656 PVC Solvent Cement D2564

CPVC Solvent Cement F493

ABS Solvent Cement D2235

PVC/CPVC/ABS All Purpose Cement For Fittings & Pipe of the same material

D2564, D2235,

F493 ABS to PVC or CPVC Transition Solvent Cement

D3138

CANADA PIPE & FITTING & SOLVENT

CEMENT

MARKING

PVC & CPVC Pipe and Fittings

ULCS636

PVC & CPVC Solvent Cement

ABS to PVC or CPVC Transition Cement

Use PVC primer and solvent cement or ABS solvent cement meeting ASTM specifications, refer to Table 2. As an alternate, use all purpose cement, to bond ABS, PVC, or CPVC pipe when using fittings and pipe made of the same materials. Use transition solvent cement when bonding ABS to either PVC or CPVC.

Low temperature solvent cement is recommended. Metal or plastic strapping may be used for vent pipe hangers. Uniformly apply a liberal coat of PVC primer for PVC or use a clean dry cloth for ABS to clean inside socket surface of fitting and male end of pipe to depth of fitting socket.

Canadian Applications Only − Pipe, fittings, primer and solvent cement used to vent (exhaust) this appliance must be certified to ULC S636 and supplied by a single manufacturer as part of an approved vent (exhaust) system. When bonding the vent system to the furnace, use ULC S636 approved One−Step Transition Cement to bond the pipe to the flue collar, or to bond the 90° elbow or reducing 90° elbow to the flue collar. In addition, the first three feet of vent pipe from the furnace flue collar must be accessible for inspection.

Table 3 lists the available exhaust termination kits, as well as vent pipe equivalencies which must be used when sizing vent pipe. All Lennox vent terminations are PVC.

Page 13

TABLE 3

OUTDOOR TERMINATION KITS AND CORRESPONDING EQUIVALENCIES

UNIT

MODEL

VENT

PIPE

DIA.

(in.)

Vent Pipe Length Equivalency (feet)

Outdoor

Exhaust

Accelerator

(Dia. X

Length)

Outdoor

Exhaust

Accelerator

(Dia. X

Length)

1−1/2" Con-

centric Kit

Concentric

Kit

Concentric

Kit

2" Wall Plate

Kit

3" Wall

Plate Kit

2" Wall

Ring Kit

1−1/2" X 12"

2" X 12"

71M80

44W92

69M29

44W92

60L46

44W93

22G44

or 30G28

44J40

or 81J20

15F74

24B−045

2 4

Not

Allowed

Not

Allowed

Not

Allowed

4 4* 4

2−1/2 5

Not

Allowed

Not

Allowed

Not

Allowed

5 5* 5

3 7

Not

Allowed

Not

Allowed

Not

Allowed

7 7* 7

4 14

Not

Allowed

Not

Allowed

Not

Allowed

14 14* 14

24B−070 36B−070

2 4

Not

Allowed

Not

Allowed

Not

Allowed

4 4* 4

2−1/2 5

Not

Allowed

Not

Allowed

Not

Allowed

5 5* 5

3 8

Not

Allowed

Not

Allowed

Not

Allowed

8 8* 8

4 14

Not

Allowed

Not

Allowed

Not

Allowed

14 14* 14

36C−090

36C−090H

48C−090

Not

Allowed

Not

Allowed

3 3

Not

Allowed

1 1**

2−1/2

Not

Allowed

Not

Allowed

6 6

Not

Allowed

2 2**

Not

Allowed

Not

Allowed

6 6

Not

Allowed

2 2**

Not

Allowed

Not

Allowed

12 12

Not

Allowed

4 4**

48C−110

48C−110H

60C−110

Not

Allowed

Not

Allowed

3 3

Not

Allowed

1 1**

2−1/2

Not

Allowed

Not

Allowed

6 6

Not

Allowed

2 2***

Not

Allowed

Not

Allowed

6 6

Not

Allowed

2 2***

Not

Allowed

Not

Allowed

12 12

Not

Allowed

4 4***

60D−135

Not

Allowed

Not

Allowed

Not

Allowed

Not

Allowed

6 6***

Not

Allowed

Not

Allowed

Not

Allowed

Not

Allowed

10 10***

*Requires field−provided and installed 1−1/2" exhaust accelerator. **Requires field−provided and installed 2" exhaust accelerator. ***For use only in non−direct vent applications, when snow riser is

not required. Requires field−provided and installed 2" exhaust accelerator.

 Termination kits 44W92, 44W93, 30G28 & 81J20 are ULC−636 approved for Canadian Installation.  The 44W92 Concentric kit is provided with a 1−1/2" accelerator which must be installed on the exhaust outlet when this kit is used with the G43UF−24B−045, G43UF−24B−070 and G43UF−36B−070 furnaces.

Page 14

Vent Piping Guidelines

The G43UF can be installed as either a Non−Direct Vent or a Direct Vent gas central furnace.

NOTE − In Non-Direct Vent installations, combustion air is taken from indoors and flue gases are discharged outdoors. In Direct Vent installations, combustion air is taken from outdoors and flue gases are discharged outdoors.

Intake and exhaust pipe sizing in Direct Vent applications and exhaust pipe sizing in Non-Direct Vent applications −−

Size pipe according to tables 4 and 5. Table 4 lists the minimum equivalent vent pipe lengths permitted. Table 5 lists the maximum equivalent pipe lengths permitted.

Maximum vent length is defined as:

Total length (linear feet) of pipe,

Plus Equivalent length (feet) of fittings, Plus Equivalent length (feet) of termination. NOTE − Include ALL pipe and ALL fittings, both indoors and outdoors.

Regardless of the diameter of pipe used, the standard roof and wall terminations described in section Exhaust Piping Terminations should be used. Exhaust vent termination pipe is sized to optimize the velocity of the exhaust gas as it exits the termination. Refer to table 6.

NOTE − The exhaust pipe should be offset a minimum of 12 inches to avoid the possibility of water droplets being released from the exhaust termination. The minimum exhaust vent length is 15 ft. Shorter exhaust vent lengths may result in the discharge of water droplets from the exhaust termination, in spite of the 12−inch vertical offset.

Each 90° elbow (including those provided with the furnace) of any diameter is equivalent to 5 feet (1.52m) of vent pipe of the same diameter. Two 45° elbows are equivalent to one 90° elbow of the same diameter. One 45° elbow is equal to 2.5 feet (.76m) of vent pipe of the same diameter.

In some applications which permit the use of several different sizes of vent pipe, a combination vent pipe may be used. Contact the Application Department for assistance in sizing vent pipe in these applications.

NOTE − The flue collar on all models is sized to accommodate 2" Schedule 40 flue pipe. When vent pipe which is larger than 2" must be used in an upflow application, a 2" elbow must be applied at the flue collar in order to properly transition to the larger diameter flue pipe. This elbow must be added to the elbow count used to determine acceptable vent lengths. Assign an equivalent feet value to this elbow according to the larger size pipe being used. Contact the Application Department for more information concerning sizing of vent systems which include multiple pipe sizes.

Use the following steps to correctly size vent pipe diameter.

Refer to Vent Pipe Size Determination Worksheet on Page 48.

1 − Determine the vent termination and its corresponding

equivalent feet value according to table 3.

2 − Determine the number of 90° elbows required for both

indoor and outdoor (e.g. snow riser) use. Calculate the corresponding equivalent feet of vent pipe.

3 − Determine the number of 45° elbows required for both

indoor and outdoor use. Calculate the corresponding

equivalent feet of vent pipe. 4 − Determine the length of straight pipe required. 5 − Add the total equivalent feet calculated in steps 1

through 4 and compare that length to the maximum

values given in table 5 for the proposed vent pipe di-

ameter. If the total equivalent length required exceeds

the maximum equivalent length listed in the appropri-

ate table, evaluate the next larger size pipe.

IMPORTANT

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

TABLE 4

MINIMUM VENT PIPE LENGTHS

G43UF

MODEL

MIN. EQUIV.

VENT LENGTH

EXAMPLE

045, 070,

090

15 ft.*

5 ft. plus 2 elbows of 2", 2−1/2", 3"

or 4" diameter pipe

110**

5 ft. plus 2 elbows of 2", 2−1/2", 3" or

4" diameter pipe

135***

5 ft. plus 2 elbows of 3" or 4"

diameter pipe

*Any approved termination may be added to the minimum equivalent length listed. **G43UF−48C−110, G43UF−110H and G43UF−60C−110 must have 90° street ell (supplied or field replacement Canadian kit) installed directly into unit flue collar. ***G43UF−60D−135 must have 3" to 2" reducing ell (supplied or field replacement Canadian kit) installed directly into unit flue collar.

TABLE 5

MAXIMUM VENT PIPE LENGTHS

DIRECT (2 PIPE) AND NON−DIRECT (1 PIPE) APPLICATIONS

ALTITUDE

G43UF

MODEL

MAXIMUM EQUIVALENT VENT

LENGTH FEET

2" dia. 2−1/2" dia. 3" dia. 4" dia.

0 − 2000

(0 − 609 m)

045 110 135 160 250 070 70 135 160 250 090 50 100 125 225

110* 30 70 125 200

135** n/a n/a ***125 180

2001 − 4500

(610 − 1371 m)

045 110 135 160 250 070 70 135 160 250 090 50 100 125 225

110* 20 70 125 200

135** n/a n/a ***90 180

4501−7500

(1372−2286 m)

045 110 135 160 250 070 70 135 160 250 090 30 100 125 225

110* n/a 70 125 200

135** n/a n/a ***90 180

7501 − 10000

(2287 − 3048 m)

045 110 135 160 250 070 70 135 160 250 090 n/a 100 125 225

110* n/a 70 125 200

135** n/a n/a ***90 180

n/a −− Not allowed. *G43UF−48C−110 and G43UF−60C−110 must have 90° street ell (supplied) installed directly into unit flue collar. **G43UF−60D−135 must have 3" to 2" reducing ell (supplied) installed directly into unit flue collar. ***90° elbows used in configuration of G43UF−60D−135 vent, must be limited to 3" sweep elbows.

Page 15

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. Allow fumes to dissipate for at least 5 minutes before placing unit into 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 a liberal coat of PVC primer for PVC or

use a clean dry cloth for ABS to clean inside socket surface of fitting and male end of pipe to depth of fitting socket.

NOTE − Furnace flue collar and air inlet fitting are both made of ABS material. Use transition solvent cement when joining ABS fittings to PVC pipe.

6 − Promptly apply solvent cement to end of pipe and in-

side socket surface of fitting. Cement should be applied 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 into socket until it bottoms out. Turn PVC pipe 1/4 turn during assembly (but not after pipe is fully inserted) to distribute cement evenly. DO NOT turn ABS or cellular core pipe.

NOTE − Assembly should be completed within 20 seconds 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 indicate a defective assembly due to insufficient solvent.

9 − Handle joints carefully until completely set.

Venting Practices

The thickness of construction through which vent pipes may be installed is 24" (610mm) maximum and 3/4" (19mm) minimum.

1 − Use recommended piping materials for exhaust pip-

ing.

2 − Secure all joints, including drip leg, gas-tight using ap-

proved cement.

Suspend piping using hangers at a minimum of every 5 feet (1.52m) for schedule 40 PVC and every 3 feet (.91m) for ABS−DWV, PVC− DWV, SPR−21 PVC, and SDR−26 PVC piping. A suitable hanger can be fabricated by using metal or plastic strapping or a large wire tie.

3 − In areas where piping penetrates joists or interior

walls, hole must be large enough to allow clearance on all sides of pipe through center of hole using a hanger.

4 − Secure piping at the point where it exits the outside

wall or roof in order to prevent transmission of vibration to the structure.

5 − 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 condensate collection trap and lines.

Exhaust Piping

NOTE − A 2" diameter PVC street ell is located on the blower deck of 48C−110, 48C−110H and 60C−110 units (or use field replacement Canadian Kit). In upflow ap- plications, the street ell must be

glued using transition solvent cement directly into the unit flue collar (or use field replacement Canadian Kit). See figure 14. A 3" to 2" PVC reducing ell is located on the blower deck of the 60D−135 units. In upflow applications, the reducing ell

must be

glued using transition solvent cement directly

into the unit flue collar.

1 − Choose the appropriate side for venting. Glue the

field−provided exhaust vent pipe (or provided street ell) to the flue collar. All cement joints should be made according to the specifications outlined in ASTM D

2855. Refer to pipe and fittings specifications and gluing procedures.

IMPORTANT

Exhaust piping and condensate trap must be installed on the same side of the unit in upflow and dowflow applications or use alternate drain kit 76M20.

FIGURE 13

STRAPPING (metal, plastic

or large wire

ties)

Page 16

FIGURE 14

TYPICAL EXHAUST PIPE CONNECTIONS AND CONDENSATE TRAP INSTALLATION

IN UPFLOW DIRECT OR NON−DIRECT VENT APPLICATIONS

(Right−Hand Exit)

VENT PLUG

(Must be

glued in

place)

PLUG

*2" diameter street elbow provided.

CONDENSATE

TRAP

(Must be installed

on same side as

exhaust piping)

−135 with

3" OR 4" vent pipe

3" to 2" REDUCING ELBOW

(provided)

−045, −070, or

−090 with

2−1/2", 3", or 4"

vent pipe

TRANSITION

(use only if 4"

pipe is

required)

2−1/2",

3", OR

TRANSITION

−110 with

2−1/2", 3", OR 4"

vent pipe

*2"

TRANSITION

2−1/2",

3", OR

**2

45°

MAX

45°

MAX

SIDE VIEW

** Street elbow may be used on −045, −070 and −090.

−045, −070 or

−090 ONLY

−110 with 2" vent pipe

2 − All horizontal runs of exhaust pipe must slope back to-

ward unit. A minimum of 1/4" (6mm) drop for each 12" (305mm) of horizontal run is mandatory for drainage. Horizontal runs of exhaust piping must be supported every 5 feet (1.52m) using hangers.

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

3 − On the opposite side of the cabinet, glue the provided

2" ABS vent plug into the unused ABS flue collar with ABS or all purpose solvent cement.

4 − Route piping to outside of structure. Continue with

installation following instructions given in piping termination section.

CAUTION

Do not discharge exhaust into an existing stack or stack that also serves another gas appliance. If vertical 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 living space.

FIGURE 15

Exhaust Pipe Offset

12" Min.*

12" Min.

Upflow Application

Rooftop Termination

Upflow Application

Side Wall Termination

*A minimum of 1/4" (6mm) drop for each 12" (305mm) of horizontal run is mandatory for drainage

Page 17

TYPICAL AIR INTAKE PIPE CONNECTIONS

UPFLOW DIRECT VENT APPLICATIONS

(Right−Hand Exit Shown)

FIGURE 16

PLUG

(Must be

glued in

place)

2*

2

*Pipe length must be limited to 4" in −135 applications.

−24B−045

−24B−070

−36B−070

−36C−090

−36C−090H

−48C−090

−48C−110 48C−110H

−60C−110

−24B−045

−24B−070

−36B−070

−36C−090

−36C−090H

−48C−090

−48C−110*

−48C−110H*

−60C−110*

−24B−045

−24B−070

−36B−070

−36C−090

−36C−090H

−48C−090

−48C−110

−48C−110H

−60C−110

−60D−135*

2

*2"

*2

TRANSITION

2−1/2",

3" OR

4

TRANSITION

2−1/2",

3" OR

4

Intake Piping

The G43UF furnace may be installed in either direct vent or non−direct vent applications. In non−direct vent applications, when intake air will be drawn into the furnace from the surrounding space, the indoor air quality must be considered and guidelines listed in Combustion, Dilution and Ventilation Air section must be followed. The G43UF unit is designed for either left−side or right−side air intake connections. Intake air piping is independent of exhaust piping.

Follow the next four steps when installing the unit in Direct Vent applications, where combustion air is taken from outdoors and flue gases are discharged outdoors. The

provided air intake screen must not be used in direct vent applications.

1 − Use transition solvent cement to connect PVC pipe to

the ABS slip connector located on the side of the burner box.

2 − Use a sheet metal screw to secure the intake pipe to

the connector, if desired. A pilot indentation is provided in the slip connector to assist in locating and starting the fastener.

3 − Glue the provided 2" ABS plug into the unused ABS air

intake connector on the opposite side of the cabinet with ABS all pupose cement.

4 − Route piping to outside of structure. Continue with

installation following instructions given in general

guide lines for piping terminations and in intake and exhaust piping terminations for direct vent sections. Refer to figure 16 for pipe sizes.

FIGURE 17

PLUG

(Must be

glued in

place)

TYPICAL AIR INTAKE PIPE CONNECTIONS

UPFLOW NON−DIRECT

VENT APPLICATIONS

(Right−Hand Exit Shown)

6 in. Max.

INTAKE

DEBRIS

SCREEN

(Provided)

NOTE − Debris screen and elbow may be rotated, so that screen may be positioned to face forward, backward or downward.

Page 18

Follow the next three steps when installing the unit in Non- Direct Vent applications where combustion air is taken from indoors and flue gases are discharged outdoors.

1 − Use field−provided materials and the factory−provided

air intake screen to route the intake piping as shown in figure 17. Maintain a minimum clearance of 3" (76mm) around the air intake opening. The air intake opening (with the protective screen) should always be directed either downward or straight out. Use 2" pipe and fittings only and make sure that the air intake does not extend more than 6" beyond the G43UF cabinet.

The air intake connector must not be located near the floor.

2 − Use a sheet metal screw to secure the intake pipe to

the connector, if desired. A pilot indentation is provided in the slip connector to assist in locating and starting the fastener.

3 − Glue the provided 2" plug into the unused air intake

connector on the opposite side of the cabinet.

General Guidelines for Vent Terminations

In Non-Direct Vent applications, combustion air is taken from indoors and the flue gases are discharged to the outdoors. The G43UF is then classified as a non-direct vent, Category IV gas furnace.

In Direct Vent applications, combustion air is taken from outdoors and the flue gases are discharged to the outdoors. The G43UF is then classified as a direct vent, Category IV gas furnace.

In both Non-Direct Vent and Direct Vent applications, the vent termination is limited by local building codes. In the absence of local codes, refer to the current National Fuel Gas Code ANSI Z223−1/NFPA 54 in U.S.A., and current CSA−B149 Natural Gas and Propane Installation Codes in Canada for details.

Position termination according to location given in figure 18 or 19. In addition, position termination so it is free from any obstructions and 12" above the average snow accumulation.

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

NOTE − If winter design temperature is below 32°F (0°C), exhaust piping should be insulated with 1/2" (13mm), Armaflex or equivalent when run through unheated space. Do not leave any surface area of exhaust pipe open to outside air; exterior exhaust pipe should be insulated with 1/2" (13mm) Armaflex or equivalent. In extreme cold climate areas, 3/4" (19mm) Armaflex or equivalent may be necessary. Insulation on outside runs of exhaust pipe must be painted or wrapped to protect insulation from deterioration. Exhaust pipe insulation may not be necessary in some specific applications.

NOTE − During extremely cold temperatures, below approximately 20°F (6.7°C), units with long runs of vent pipe through unconditioned space, even when insulated, may form ice in the exhaust termination that prevents the unit from operating properly. Longer run times of at least 5 minutes will alleviate most icing problems. Also, a heating cable may be installed on exhaust piping and termination to prevent freeze−ups. Heating cable installation kit is available from Lennox. See Condensate Piping section for part numbers.

IMPORTANT

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

IMPORTANT

For Canadian Installations Only: In accordance to CSA International B149 installation codes, the minimum allowed distance between the combustion air intake inlet and the exhaust outlet of other appliances shall not be less than 12 inches (305mm).

Page 19

FIGURE 18

VENT TERMINATION CLEARANCES

FOR NON−DIRECT VENT INSTALLATIONS IN THE USA AND CANADA

INSIDE CORNER

DETAIL

VENT TERMINAL

AIR SUPPLY INLET

AREA WHERE TERMINAL IS NOT PERMITTED

Fixed

Closed

Operable

Fixed

Closed

Operable

A =

B =

C =

D =

E =

F =

G =

H =

I =

J =

K =

L =

M =

US Installations

Canadian Installations

12 inches (305mm) or 12 in. 305mm)

above average snow accumulation.

12 inches (305mm) or 12 in. 305mm)

above average snow accumulation.

Clearance above grade, veranda,

porch, deck or balcony

Clearance to window or

door that may be opened

4 feet (1.2 m) below or to side of opening;

1 foot (30 cm) above opening

6 inches (152mm) for appliances <10,000

Btuh (3kw), 12 inches (305mm) for

appliances > 10,000 Btuh (3kw) and

<100,000 Btuh (30kw), 36 inches (.9m)

for appliances > 100,000 Btuh (30kw)

Clearance to permanently

closed window

Vertical clearance to ventilated soffit

located above the terminal within a

horizontal distance of 2 feet (mm)

from the center line of the terminal

Clearance to unventilated soffit

Clearance to outside corner

Clearance to inside corner

Clearance to each side of center line ex-

tended above meter / regulator assembly

Clearance to service regulator

vent outlet

Clearance to non−mechanical air

supply inlet to building or the com-

bustion air inlet to any other ap-

pliance

Clearance to mechanical air sup-

ply inlet

Clearance above paved sidewalk or

paved driveway located on public property

Clearance under veranda, porch,

deck or balcony

* 12"

* Equal to or greater than soffit depth.

* 3 feet (.9m)

* 12"

3 feet (.9m) within a height 15 feet (4.5m)

above the meter / regulator assembly

3 feet (.9m)

6 inches (152mm) for appliances <10,000

Btuh (3kw), 12 inches (305mm) for

appliances > 10,000 Btuh (3kw) and

<100,000 Btuh (30kw), 36 inches (.9m)

for appliances > 100,000 Btuh (30kw)

3 feet (.9m) above if within 10 feet

(3m) horizontally

6 feet (1.8m)

7 feet (2.1m)

12 inches (305mm)

In accordance with the current ANSI Z223.1/NFPA 54 Natural Fuel Gas Code

In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code

 A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.

 Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor. Lennox recommends avoiding this location if possible.

4 feet (1.2 m) below or to side of opening;

1 foot (30 cm) above opening

7 feet (2.1m)

* Equal to or greater than soffit depth.

* No minimum to outside corner * No minimum to outside corner

3 feet (.9m) within a height 15 feet (4.5m)

above the meter / regulator assembly

*12 inches (305mm)

* 3 feet (.9m) * 3 feet (.9m)

*For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B149.1, clearance will be in accordance with local installation codes and the requirements of the gas supplier and these installation instructions."

Page 20

FIGURE 19

VENT TERMINATION CLEARANCES

FOR DIRECT VENT INSTALLATIONS IN THE USA AND CANADA

INSIDE CORNER

DETAIL

VENT TERMINAL

AIR SUPPLY INLET

AREA WHERE TERMINAL IS NOT PERMITTED

Fixed

Closed

Operable

Fixed

Closed

Operable

A =

B =

C =

D =

E =

F =

G =

H =

I =

J =

K =

L =

M =

US Installations

Canadian Installations

12 inches (305mm) or 12 in. 305mm)

above average snow accumulation.

12 inches (305mm) or 12 in. 305mm)

above average snow accumulation.

Clearance above grade, veranda,

porch, deck or balcony

Clearance to window or

door that may be opened

6 inches (152mm) for appliances <10,000

Btuh (3kw), 9 inches (mm) for appliances

> 10,000 Btuh (3kw) and <50,000 Btuh

(15 kw), 12 inches (305mm) for ap-

pliances > 50,000 Btuh (15kw)

6 inches (152mm) for appliances <10,000

Btuh (3kw), 12 inches (305mm) for

appliances > 10,000 Btuh (3kw) and

<100,000 Btuh (30kw), 36 inches (.9m)

for appliances > 100,000 Btuh (30kw)

Clearance to permanently

closed window

Vertical clearance to ventilated soffit

located above the terminal within a

horizontal distance of 2 feet (mm)

from the center line of the terminal

Clearance to unventilated soffit

Clearance to outside corner

Clearance to inside corner

Clearance to each side of center line extended above meter / regulator assembly

Clearance to service regulator

vent outlet

Clearance to non−mechanical air

supply inlet to building or the com-

bustion air inlet to any other ap-

pliance

Clearance to mechanical air sup-

ply inlet

Clearance above paved sidewalk or

paved driveway located on public property

Clearance under veranda, porch,

deck or balcony

* 12"

* 3 feet (.9m)

* 7 feet (2.1m)

3 feet (.9m) within a height 15 feet (4.5m)

above the meter / regulator assembly

3 feet (.9m)

6 inches (152mm) for appliances <10,000

Btuh (3kw), 9 inches (mm) for appliances

> 10,000 Btuh (3kw) and <50,000 Btuh

(15 kw), 12 inches (305mm) for ap-

pliances > 50,000 Btuh (15kw)

6 inches (152mm) for appliances <10,000

Btuh (3kw), 12 inches (305mm) for

appliances > 10,000 Btuh (3kw) and

<100,000 Btuh (30kw), 36 inches (.9m)

for appliances > 100,000 Btuh (30kw)

3 feet (.9m) above if within 10 feet

(3m) horizontally

6 feet (1.8m)

7 feet (2.1m)

12 inches (305mm)

In accordance with the current ANSI Z223.1/NFPA 54 Natural Fuel Gas Code

In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code

 A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.

 Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor. Lennox recommends avoiding this location if possible.

* 12"

* Equal to or greater than soffit depth

* Equal to or greater than soffit depth* Equal to or greater than soffit depth

* Equal to or greater than soffit depth * Equal to or greater than soffit depth

* No minimum to outside corner

3 feet (.9m) within a height 15 feet (4.5m)

above the meter / regulator assembly

3 feet (.9m)

* 3 feet (.9m)

*12 inches (305mm)

Page 21

Details of Intake and Exhaust Piping Terminations for Direct Vent Installation

NOTE − In Direct Vent installations, combustion air is taken from outdoors and flue gases are discharged to outdoors.

Intake and exhaust pipes may be routed either horizontally through an outside wall or vertically through the roof. In attic or closet installations, vertical termination through the roof is preferred. Figures 20 through 30 show typical terminations.

1 − 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.

2 − Intake and exhaust pipes should be placed as close

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

3 − On roof terminations, the intake piping should termi-

nate straight down using two 90° elbows (See figure

20).

4 − Exhaust piping must terminate straight out or up as

shown. A reducer may be required on the exhaust piping at the point where it exits the structure to improve the velocity of exhaust away from the intake piping. See table 6.

NOTE − Care must be taken to avoid recirculation of exhaust back into intake pipe.

FIGURE 20

UNCONDITIONED

ATTIC SPACE

1/2" (13mm) FOAM

INSULATION IN

UNCONDITIONED

SPACE

SIZE TERMINATION PIPE PER TABLE 6.

3"(76mm) MAX.

12" (305mm) ABOVE

AVERAGE SNOW ACCUMULATION

3" (76mm) OR

2" (51mm) PVC

PROVIDE SUPPORT

FOR INTAKE AND

EXHAUST LINES

8" (203mm) MIN

Inches(mm)

DIRECT VENT ROOF TERMINATION KIT

(15F75 or 44J41)

FIGURE 21

FIELD SUPPLIED WALL TERMINATION OR

(15F74) WALL RING TERMINATION KIT

See venting table 5 for maximum venting lengths with this arrangement.

* Use wall support every 24" (610 mm). Use two wall supports if extension is greater than 24" (610 mm) but less than 48" (1219 mm). NOTE − One wall support must be 6" (152 mm) from top of each pipe (intake and exhaust)

2" (51mm)

Vent Pipe

3" (76mm)

Vent Pipe

A−Minimum clearance

above grade or average

snow accumulation

B−Maximum horizontal separation between

intake and exhaust

C−Minimum from

end of exhaust to

inlet of intake

D−Maximum exhaust

pipe length

E−Maximum wall support

distance from top of each

pipe (intake/exhaust)

12" (508MM) 12" (508MM)

6" (152MM) 6" (152MM)

8" (203MM) 8" (203MM)

12" (305MM) 20" (508MM)

6" (152MM) 6" (152MM)

NOTE − FIELD PROVIDED

REDUCER MAY BE

REQUIRED TO ADAPT

LARGER VENT PIPE SIZE

TO TERMINATION

SIZE TERMINATION

PER TABLE 6

1/2" (13mm) ARMAFLEX

INSULATION IN UN-

CONDITIONED SPACE

STRAIGHT

APPPLICATION

* WALL

SUPPORT

1/2" (13mm) ARMAFLEX INSULATION

IN UNCONDITIONED SPACE

EXTENDED

APPLICATION

Page 22

FIGURE 22

FIELD SUPPLIED WALL TERMINATION OR

(15F74) WALL RING TERMINATION KIT

With INTAKE ELBOW

See venting table 5 for maximum venting lengths with this arrangement.

2" (51mm)

Vent Pipe

3" (76mm)

Vent Pipe

12" (508MM) 12" (508MM)

6" (152MM) 6" (152MM)

6" (152MM)

12" (305MM) 20" (508MM)

6" (152MM) 6" (152MM)

6" (152MM)

A−Minimum clearance

above grade or average

snow accumulation

B−Maximum horizontal

separation between

intake and exhaust

C−Minimum from

end of exhaust to

inlet of intake

D−Maximum exhaust

pipe length

E−Maximum wall support

distance from top of each

pipe (intake/exhaust)

NOTE − FIELD PROVIDED

REDUCER MAY BE

REQUIRED TO ADAPT

LARGER VENT PIPE SIZE

TO TERMINATION

SIZE TERMINATION

PER TABLE 6

1/2" (13mm) ARMAFLEX

INSULATION IN UN-

CONDITIONED SPACE

STRAIGHT

APPPLICATION

* WALL

SUPPORT

1/2" (13mm) ARMAFLEX INSULATION

IN UNCONDITIONED SPACE

EXTENDED

APPLICATION

TABLE 6

EXHAUST PIPE TERMINATION SIZE REDUCTION

G43UF

MODEL

Exhaust Pipe Size

Termination

Pipe Size

045 and 070

2" (51mm), 2−1/2" (64mm),

3" (76mm) or 4" (102mm)

1−1/2" (38mm)

090 2" (51mm) 110 2" (51mm)

135

3" (76mm) or 4" (102mm)

2" (51mm)

5 − On field supplied terminations for side wall exit, ex-

haust piping may extend a maximum of 12 inches (305mm) for 2" PVC and 20 inches (508mm) for 3" (76mm) PVC beyond the outside wall. Intake piping should be as short as possible. See figures 21 and 22.

6 − On field supplied terminations, a minimum distance

between the end of the exhaust pipe and the end of the intake pipe without a termination elbow is 8" and a minimum distance of 6" with a termination elbow. See figures 21 and 22.

7 − If intake and exhaust piping must be run up a side wall

to position above snow accumulation or other obstructions, piping must be supported every 24" (610mm) as shown in figures 21 and 22. In addition, close coupled wall termination kits must be extended for use in this application. See figures 28 and 29. When exhaust and intake piping must be run up an outside wall, the exhaust piping must be terminated with pipe sized per table 6.The intake piping may be equipped with a 90° elbow turndown. Using turndown will add 5 feet (1.5m) to the equivalent length of the pipe.

8 − Based on the recommendation of the manufacturer, a

multiple furnace installation may use a group of up to four terminations assembled together horizontally, as shown in figure 25.

Page 23

FIGURE 23

DIRECT VENT CONCENTRIC ROOFTOP TERMINATION

71M80, 69M29 or 60L46 (US)

41W92 or 41W93 (Canada)

Minimum

Above Average

Snow

Accumulation

SHEET METAL STRAP

(Clamp and sheet metal strap must be field installed to support the weight of the termination kit.)

FLASHING

(Not Furnished)

CLAMP

FIELD−PROVIDED

REDUCER MAY BE REQUIRED

TO ADAPT LARGER VENT

PIPE SIZE TO TERMINATION

INTAKE

1 1/2" (38mm) accelerator

provided on 71M80 &

44W92 kits for

G43UF−24B−045, 070 &

36B−070

12” (305mm)

12" (305mm) Min.

above grade or

average snow ac-

cumulation.

FIGURE 24

DIRECT VENT CONCENTRIC WALL TERMINATION

71M80, 69M29 or 60L46 (US)

41W92 or 41W93 (Canada)

INTAKE

AIR

EXHAUST

AIR

INTAKE

AIR

INTAKE

AIR

EXHAUST

AIR

OUTSIDE

WALL

GRADE

CLAMP

(Not Furnished)

FIELD−PROVIDED

REDUCER MAY BE

REQUIRED TO ADAPT

LARGER VENT PIPE

SIZE TO TERMINATION

1 1/2" (38mm) accelerator

provided on 71M80 &

44W92 kits for

G43UF−24B−045, 070 &

36B−070

FIGURE 25

EXHAUST

VENT

INTAKE

AIR

5−1/2"

(140mm)

Front View

12"

(305mm)

(127mm)

18" MAX.

(457mm)

EXHAUST VENT

INTAKE

AIR

OPTIONAL VENT TERMINATION FOR MULTIPLE UNIT

INSTALLATION OF DIRECT VENT WALL TERMINATION KIT

(22G44, 44J40, 30G28 or 81J20)

Inches (mm)

Side View

12" (305mm) Min.

above grade or

average snow ac-

cumulation.

optional intake elbow

FIGURE 26

1/2" (13mm) Foam Insulation

in Unconditioned Space

EXHAUST VENT

INTAKE AIR

OUTSIDE WALL

EXHAUST VENT

INTAKE

AIR

Front View

Top View

DIRECT VENT WALL TERMINATION KIT

(30G28 or 81J20)

6 (152mm) MIN.

SIZE

TERMINATION

PIPE PER TABLE 6.

FIELD−PROVIDED

REDUCER MAY

BE REQUIRED TO

ADAPT LARGER

VENT PIPE SIZE

TO TERMINATION

FIGURE 27

1/2" (13mm) Foam Insulation

in Unconditioned Space

EXHAUST VENT

INTAKE AIR

OUTSIDE WALL

EXHAUST VENT

INTAKE

AIR

Front View

Top View

DIRECT VENT WALL TERMINATION KIT

(22G44 or 44J40)

8" (206mm) MIN.

SIZE

TERMINATION

PIPE PER TABLE 6.

FIELD−PROVIDED

REDUCER MAY

BE REQUIRED TO

ADAPT LARGER

VENT PIPE SIZE

TO TERMINATION

Page 24

FIGURE 28

12” (305 mm) Minimum

Above Grade or Average

Snow Accumulation

1/2” (13 mm)

FOAM INSULATION

(Field Furnished)

5” (127 mm)

5−1/2”

(140 mm)

EXHAUST

AIR

INTAKE

AIR

GRADE

12”

(305 mm)

INTAKE

AIR

EXHAUST

AIR

GRADE

12” (305 mm) Max. for 2” (51 mm) Dia. Exhaust 20” (508 mm) Max. for 3” (76 mm) Dia. Exhaust

WALL SUPPORT*

12” (305 mm) Max. for 2” (51 mm) Dia. Exhaust 20” (508 mm) Max. for 3” (76 mm) Dia. Exhaust

12” (305 mm) Minimum

Above Grade or Average

Snow Accumulation

WALL TERMINATION KITS (CLOSE−COUPLE)

EXTENDED VENT FOR GRADE CLEARANCE

2 inch (51 mm) 22G44 (US)

3 inch (76 mm) 44J40 (US)

6” (152 mm)

Maximum

If Intake and Exhaust Pipe is less than 12 in. (305 mm)

above snow accumulation or other obstructions, field fabricated piping must be installed.

8” (203 mm) Min. for 2” (51 mm) & 3” (76 mm) DIA. pipe

between the end of the exhaust pipe and intake pipe

8” (203 mm) Min.

*Use wall support every 24" (610). Use two supports if

extension is greater than 24" but less than 48".

FIELD−PROVIDED

REDUCER MAY BE REQUIRED TO ADAPT

LARGER VENT PIPE SIZE TO TERMINATION

FIGURE 29

12” (305 mm) Minimum

Above Grade or Average

Snow Accumulation

1/2” (13 mm)

FOAM INSULATION

(Field Furnished)

5” (127 mm)

5−1/2”

(140 mm)

EXHAUST

AIR

INTAKE

AIR

GRADE

12”

(305 mm)

INTAKE

AIR

EXHAUST

AIR

GRADE

WALL SUPPORT*

12” (305 mm) Minimum

Above Grade or Average

Snow Accumulation

WALL TERMINATION KITS (CLOSE−COUPLE)

EXTENDED VENT FOR GRADE CLEARANCE

2 inch (51 mm) 30G28 (WTK Canada)

3 inch (76 mm) 81J20 (WTK Canada)

See Installation Instructions for additional information.

6” (152 mm)

Maximum

If Intake and Exhaust Pipe is less than 12 in. (305 mm) above snow accumulation or other obstructions, field fabricated piping must be installed.

12” (305 mm) Max. for 2” (51 mm) Dia. Exhaust 20” (508 mm) Max. for 3” (76 mm) Dia. Exhaust

6” (152 mm)

Minimum

6” (152 mm)

Minimum

*Use wall support every 24" (610). Use two supports if

extension is greater than 24" but less than 48".

FIELD−PROVIDED

REDUCER MAY BE REQUIRED TO ADAPT

LARGER VENT PIPE SIZE TO TERMINATION

Page 25

G43MP DIRECT VENT APPLICATION

USING EXISTING CHIMNEY

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.

FIGURE 30

8" − 12"

(203mm − 305mm)

3" − 8" (76mm− 203mm)

3" − 8"

(76mm−

203mm)

STRAIGHT−CUT OR

ANGLE−CUT IN DIRECTION

OF ROOF SLOPE *

EXHAUST VENT

1/2" (13mm)

WEATHERPROOF

INSULATION

SHOULDER OF FITTINGS

PROVIDE SUPPORT

OF PIPE ON TOP PLATE

ALTERNATE

INTAKE PIPE

INSULATION (optional)

EXTERIOR

PORTION OF

CHIMNEY

INSULATE TO FORM

SEAL

SHEET

METAL TOP

PLATE

*SIZE TERMINATION

PIPE PER TABLE 6.

Minimum 12" (305MM)

above chimney top

plate or average snow

accumulation

Details of Exhaust Piping Terminations for Non-Direct Vent Applications

Exhaust pipes may be routed either horizontally through an outside wall or vertically through the roof. In attic or closet installations, vertical termination through the roof is preferred. Figures 31 through 34 show typical terminations.

1 − Exhaust piping must terminate straight out or up as

shown. The termination pipe must be sized as listed in table 6.The specified pipe size ensures proper velocity required to move the exhaust gases away from the building.

2 − On field supplied terminations for side wall exit, ex-

haust piping may extend a maximum of 12 inches (305mm) for 2" PVC and 20 inches (508mm) for 3" (76mm) PVC beyond the outside wall. See figure 32.

FIGURE 31

NON−DIRECT VENT ROOF TERMINATION KIT

(15F75 or 44J41)

UNCONDITIONED

ATTIC SPACE

3" (76mm) OR

2" (51mm) PVC

PROVIDE SUPPORT

FOR EXHAUST LINES

12" (305mm)

ABOVE AVE.

SNOW

ACCUMULATION

SIZE TERMINATION PIPE PER TABLE 6.

1/2" (13mm) FOAM

INSULATION

FIGURE 32

1/2" (13mm) ARMAFLEX

INSULATION IN

UNCONDITIONED SPACE

PVC REDUCER

1/2" (13mm)

ARMAFLEX

INSULATION

NON−DIRECT VENT FIELD SUPPLIED WALL TERMINATION OR

(15F74) WALL TERMINATION KIT

SIZE TERMINATION PIPE PER TABLE 6.

FIELD−PROVIDED

REDUCER MAY

BE REQUIRED TO

ADAPT LARGER VENT PIPE SIZE

TO TERMINATION

12" MIN. (305mm)

Above Grade or

average snow accumulation

12" (305mm) MAX. for 2" (51mm) 20" (508mm) MAX. for 3" (76mm)

3 − If exhaust piping must be run up a side wall to position

above snow accumulation or other obstructions, piping must be supported every 24 inches (610mm) as shown in figure 33. When exhaust piping must be run up an outside wall, any reduction in exhaust pipe size must be done after the final elbow.

Page 26

FIGURE 33

12" (305mm)

ABOVE GRADE OR

AVERAGE SNOW

ACCUMULATION

UNCONDITIONED

SPACE

1/2" (13mm) FOAM

INSULATION

1/2" (13mm) FOAM

INSULATION IN

UNCONDITIONED

SPACE

*WALL SUPPORT

OUTSIDE WALL

SIZE TERMINATION PIPE PER

TABLE 6.

FIELD−PROVIDED

REDUCER MAY BE

REQUIRED TO

ADAPT LARGER

VENT PIPE SIZE TO

TERMINATION

*Use wall support every 24" (610). Use two supports if extension is

greater than 24" but less than 48".

12" (305mm) MAX. for 2" (51mm) 20" (508mm) MAX. for 3" (76mm)

NON−DIRECT VENT FIELD SUPPLIED WALL TERMINATION

EXTENDED OR (15F74) WALL TERMINATION VENT PIPE

EXTENDED

6" (152mm)

Max

FIGURE 34

3" − 8"

(76mm−

203mm)

3" − 8"

(76mm−

203mm)

STRAIGHT−CUT OR

ANGLE−CUT IN DIRECTION

OF ROOF SLOPE

EXHAUST VENT

1/2" (13mm)

WEATHERPROOF

INSULATION

SHOULDER OF FITTINGS

PROVIDE SUPPORT

OF PIPE ON TOP PLATE

EXTERIOR

PORTION OF

CHIMNEY

INSULATE TO FORM

SEAL

SHEET

METAL TOP

PLATE

SIZE TERMINATION PIPE PER TABLE 6.

G43UF NON−DIRECT VENT APPLICATION

USING EXISTING CHIMNEY

Minimum 12" (305MM)

above chimney top

plate or average snow

accumulation

Condensate Piping

This unit is designed for either right- or left-side exit of condensate piping; however, it must be installed on the same side of the unit as the exhaust piping. A 5−1/2" service clearance is required for the condensate trap. Refer to figure 35 for condensate trap locations.

When possible, the condensate drain lines should be routed within the conditioned space to avoid freezing of condensate and blockage of the drain line. When condensate drain line must be routed through unconditioned space, use an electric heat cable to prevent freezing of condensate.

FIGURE 35

CONDENSATE TRAP LOCATIONS

Optional

upflow

Optional

upflow

NOTE − When side return air filter is installed on same side as the condensate trap, filter rack must be installed beyond condensate trap to avoid interference.

1 − Determine which side condensate piping will exit the

unit. Remove plugs from the condensate collar at the appropriate location on the side of the unit.

NOTE − The condensate trap is factory−shipped with two rubber O−rings and two rubber clean−out caps installed. Check to make sure that these items are in place before installing the trap assembly. O−rings must be properly positioned between trap and cabinet to ensure seal between the condensate trap and the cabinet. It is not necessary to apply glue or sealant.

2 − Install condensate trap onto the condensate collar.

Use provided HI/LO screws to secure two upper flanges of the trap to the collar. Use provided sheet metal screw to secure bottom trap flange to side of unit. DO NOT apply glue to secure condensate trap to cabinet. All other joints must be glued. See figure

36.

NOTE − Condensate trap must be installed on the same side as exhaust piping.

CAUTION

DO NOT use a power driver to tighten screws which secure condensate trap to cabinet. Screws should be hand−tightened using a screw driver to avoid the possibility of damage to the trap assembly.

Page 27

CONDENSATE ASSEMBLY

FIGURE 36

COUPLING

CAP

CONDENSATE TRAP

NIPPLE

TEE

VENT

CLEAN−OUT ACCESS

(both sides)

HI/LO SCREWS (DO NOT use power driver. Hand−tighten using screw driver.)

SCREW

O−RINGS

NOTE − Use screws to secure condensate trap to cabinet. DO NOT apply glue to this joint. All other joints must be glued.

3 − The condensate trap provided with the unit is

manufactured using ABS material. Use ABS to PVC transition solvent cement to glue a field−provided PVC coupling or PVC pipe to the trap. Install a tee and vent pipe near the trap.

NOTE − The condensate trap drain stubs (both sides) have an outer diameter which will accept a standard 3/4" PVC coupling. The inner diameter of each stub will accept standard 1/2" diameter PVC pipe.

NOTE − Vinyl tubing may be used for condensate drain. Tubing must be 1−1/4" OD X 1" ID and should be attached to the drain stubs on the trap using a hose clamp.

4 − Glue the field−provided drain line to the tee. Route the

drain line to an open drain. As an alternate, clear vinyl tubing may be used to drain condensate away from the trap. Secure the vinyl tubing to the drain stubs on the trap using a hose clamp. Do not overtighten the hose clamp. Condensate line must be sloped downward away from condensate trap to drain. If drain level is above condensate trap, condensate pump must be used. 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 line. Heating cable kit is available from Lennox in various lengths; 6 ft. (1.8m) − kit no. 26K68; 24 ft. (7.3m) − kit no. 26K69; and 50 ft. (15.2m) − kit no. 26K70.

CAUTION

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

5 − If unit will be started immediately upon completion of

installation, prime trap per procedure outlined in Unit Start−Up section.

6 − Glue the provided cap onto the unused condensate

drain line stub.

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 outside the furnace cabinet.

WARNING

Do not exceed 600 in−lbs (50 ft−lbs) torque when attaching the gas piping to the gas valve.

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 side of the valve as shown in figure 38.

IMPORTANT

The Honeywell VR8205 gas valve requires a low inlet pressure switch in LP/propane applications. A 4" BIP nipple must be installed in the gas valve inlet when right−side gas entry is used in LP/propane applications. See figure 38.

2 − When connecting gas supply, factors such as length of

run, number of fittings and furnace rating must be considered to avoid excessive pressure drop. Table 7 lists recommended pipe sizes for typical applications.

NOTE − Use two wrenches when connecting gas piping to avoid transferring torque to the manifold.

3 − Gas piping must not run in or through air ducts, clothes

chutes, chimneys or gas vents, dumb waiters or elevator shafts. Center gas line through piping hole. Gas line should not touch side of unit. See figure 38.

Page 28

4 − Piping should be sloped 1/4 inch per 15 feet (6mm per

5.6m) upward toward the gas meter from the furnace. The piping must be supported at proper intervals, every 8 to 10 feet (2.44 to 3.05m), using suitable hangers or straps. Install a drip leg in vertical pipe runs to serve as a trap for sediment or condensate.

5 − A 1/8" N.P.T. plugged tap or pressure post is located

on the gas valve to facilitate test gauge connection. See figures 45 and 46.

6 − In some localities, codes may require installation of a

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

IMPORTANT

Compounds used on threaded joints of gas piping must be resistant to the actions of liquified petroleum gases.

FIGURE 37

MANUAL MAIN SHUT−OFF

VALVE WILL NOT HOLD

NORMAL TEST PRESSURE

CAP

FURNACE

ISOLATE

GAS VALVE

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.

The furnace must be isolated from the gas supply system by closing its individual manual shut-off valve during any pressure testing of the gas supply system at pressures less than or equal to 1/2 psig (3.48 kPa, 14 inches w.c.).

IMPORTANT

When testing pressure of gas lines, gas valve must be disconnected and isolated. See figure 37. Gas valves can be damaged if subjected to pressures greater than 1/2 psig (3.48 kPa).

WARNING

FIRE OR EXPLOSION HAZARD Failure to follow the safety warnings exactly could result in serious injury, death, or property damage. Never use an open flame to test for gas leaks. Check all connections using a commercially available soap solution made specifically for leak detection.Some soaps used for leak detection are corrosive to certain metals. Carefully rinse piping thoroughly after leak test has been completed.

GROUND

JOINT

UNION

AUTOMATIC

GAS VALVE

(with manual

shut−off valve)

FIELD

PROVIDED

AND INSTALLED

Left Side Piping

(Standard)

DRIP LEG

MANUAL

MAIN SHUT−OFF

VALV E

GROUND

JOINT

UNION

DRIP LEG

MANUAL

MAIN SHUT−OFF

VALV E

Right Side Piping

(Alternate)

In LP/propane applications using a Honeywell VR8205 gas valve, a 4" BIP nipple must be installed to accommodate the low inlet pressure switch.

FIGURE 38

Page 29

TABLE 7

GAS PIPE CAPACITY − FT

/HR (kL/HR)

Nominal

Iron Pipe Size

−Inches(mm)

Internal

Diameter

−Inches(mm)

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)

100

(30.480)

1/4

(6.35)

.364

(9.246)

(1.13)

(.82)

(.68)

(.57)

(.51)

(.45)

(.42)

(.40)

(.37)

(.34)

3/8

(9.53)

.493

(12.522)

(2.69)

(1.84)

(1.47)

(1.27)

(1.13)

(1.02)

(.73)

(.88)

(.82)

(.76)

1/2

(12.7)

.622

(17.799)

175

(4.96)

120

(3.40)

(2.75)

(2.32)

(2.07)

(1.87)

(1.73)

(1.61)

(1.50)

(1.42)

3/4

(19.05)

.824

(20.930)

360

(10.19)

250

(7.08)

200

(5.66)

170

(4.81)

151

(4.28)

138

(3.91)

125

(3.54)

118

(3.34)

110

(3.11)

103

(2.92)

(25.4)

1.049

(26.645)

680

(19.25)

465

(13.17)

375

(10.62)

320

(9.06)

285

(8.07)

260

(7.36)

240

(6.80)

220

(6.23)

205

(5.80)

195

(5.52)

1−1/4

(31.75)

1.380

(35.052)

1400

(39.64)

950

(26.90)

770

(21.80)

660

(18.69)

580

(16.42)

530

(15.01)

490

(13.87)

460

(13.03)

430

(12.18)

400

(11.33)

1−1/2

(38.1)

1.610

(40.894)

2100

(59.46)

460

(41.34)

1180

(33.41)

990

(28.03)

900

(25.48)

810

(22.94)

750

(21.24)

690

(19.54)

650

(18.41)

620

(17.56)

(50.8)

2.067

(52.502)

3950

(111.85)

2750

(77.87)

2200

(62.30)

1900

(53.80)

1680

(47.57)

1520

(43.04)

1400

(39.64)

1300

(36.81)

1220

(34.55)

1150

(32.56)

2−1/2

(63.5)

2.469

(67.713)

6300

(178.39)

4350

(123.17)

3520

(99.67)

3000

(84.95)

2650

(75.04)

2400

(67.96)

2250

(63.71)

2050

(58.05)

1950

(55.22)

1850

(52.38)

(76.2)

3.068

(77.927)

11000

(311.48)

7700

(218.03)

6250

(176.98)

5300

(150.07)

4750

(134.50)

4300

(121.76)

3900

(110.43)

3700

(104.77)

3450

(97.69)

3250

(92.03)

(101.6)

4.026

(102.260)

23000

(651.27)

15800

(447.39)

12800

(362.44)

10900

(308.64)

9700

(274.67)

8800

(249.18)

8100

(229.36)

7500

(212.37)

7200

(203.88)

6700

(189.72)

NOTE − Capacity given in cubic feet of gas per hour (kilo liters of gas per hour) and based on 0.60 specific gravity gas.

Page 30

Electrical

ELECTROSTATIC DISCHARGE (ESD)

Precautions and Procedures

CAUTION

Electrostatic discharge can affect electronic components. Take precautions during furnace installation and service to protect the furnace’s electronic controls. Precautions will help to avoid control exposure 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 unpainted unit surface, such as the gas valve or blower deck, before performing any service procedure.

INTERIOR MAKE−UP BOX INSTALLATION

MAKE−UP

BOX

Right Side

FIGURE 39

INTERIOR MAKE−UP BOX INSTALLATION

MAKE−UP

BOX

Left side

FIGURE 40

The unit is equipped with a field make−up box. The make− up box may be moved to the right side of the furnace to facilitate installation. If the make−up box is moved to the right side, the excess wire must be pulled into the blower compartment. Secure the excess wire to the existing harness to protect it from damage.

Refer to figure 42 for field wiring and figure 43 for schematic wiring diagram and troubleshooting.

Select circuit protection and wire size according to the

unit nameplate. The power supply wiring must meet Class I restrictions.

Holes are on both sides of the furnace cabinet to facili-

tate wiring.

Install a separate disconnect switch (protected by ei-

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

Before connecting the thermostat or the power wiring,

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

Complete the wiring connections to the equipment.

Use the provided unit wiring diagram and the field wiring diagram shown in figure 42. Use 18−gauge wire or larger that is suitable for Class II rating for thermostat connections.

Electrically ground the unit according to local codes or,

in the absence of local codes, according to the current National Electric Code (ANSI/NFPA No. 70) for the USA and current Canadian Electric Code part 1 (CSA standard C22.1) for Canada. A green ground wire is provided in the field make−up box.

NOTE − The G43UF furnace contains electronic components that are polarity sensitive. Make sure that the furnace is wired correctly and is properly grounded.

One line voltage EAC" accessory terminal is provided

on the furnace control board. Any electronic air cleaner rated up to one amp can be connected to this terminal with the neutral leg of the circuit being connected to the any of the NEUTRAL" terminals. See figure 44 for control board configuration. This terminal is energized whenever the blower is operating.

One line voltage HUM" accessory terminal is provided

on the furnace control board. Any humidifier rated up to one amp can be connected to this terminal with the neutral leg of the circuit being connected to any of the NEUTRAL" terminals. See figure 44 for control board configuration. This terminal is energized in the heating mode whenever the combustion air inducer is operating.

Page 31

Thermostat

G43UF

Furnace

Condensing

Unit

G43UF and CONDENSING UNIT

THERMOSTAT DESIGNATIONS

(Refer to specific thermostat and outdoor unit.)

COMMON

POWER

HEAT

INDOOR BLOWER

COOLING

FIGURE 41

CONDENSING

UNIT

CONDENSING

UNIT COMMON

Install the room thermostat according to the instruc-

tions provided with the thermostat. See figure 41 for thermostat designations. If the furnace is being matched with a heat pump, refer to the FM21 installation instruction.

Indoor Blower Speeds

1 − When the thermostat is set to FAN ON," the indoor

blower will run continuously on the heating speed when there is no cooling or heating demand.

2 − When the G43UF is running in the heating mode, the

indoor blower will run on the heating speed.

3 − When there is a cooling demand, the indoor blower will

run on the cooling speed.

TYPICAL G43UF FIELD WIRING DIAGRAM

FIGURE 42

Page 32

TYPICAL G43UF WIRING DIAGRAM

FIGURE 43

Page 33

FIGURE 44

INTEGRATED CONTROL BOARD

(Automatic Hot Surface Ignition System)

TERMINAL DESIGNATIONS

HUM LINE XFMR EAC COOL HEAT PARK FLAME NEUTRALS

Humidifier (120VAC) Input (120VAC) Transformer (120VAC) Electronic Air Cleaner (120VAC) Blower − Cooling Speed (120VAC) Blower − Heating Speed (120VAC) Dead terminals to park alternate spd taps Flame senser Neutral terminals (120VAC)

3 AMP, 32 VAC FUSE

BLOWER OFF

DELAY JUMPER

Unit Start−Up

FOR YOUR SAFETY READ BEFORE OPERATING

WARNING

Do not use this furnace if any part has been underwater. A flood−damaged furnace is extremely dangerous. Attempts to use the furnace can result in fire or explosion. Immediately call a qualified service technician to inspect the furnace and to replace all gas controls, control system parts, and electrical parts that have been wet or to replace the furnace, if deemed necessary.

WARNING

Danger of explosion. Can cause injury or product or property damage. Should the gas supply fail to shut off or if overheating occurs, shut off the gas valve to the furnace before shutting off the electrical supply.

CAUTION

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

Priming Condensate Trap

The condensate trap should be primed with water prior to start−up to ensure proper condensate drainage. Either pour 10 fl. oz. (300 ml) of water into the trap, or follow these steps to prime the trap:

1 − Follow the lighting instructions to place the unit into op-

eration.

2 − Set the thermostat to initiate a heating demand.

3 − Allow the burners to fire for approximately 3 minutes.

4 − Adjust the thermostat to deactivate the heating de-

mand.

5 − Wait for the combustion air inducer to stop. Set the

thermostat to initiate a heating demand and again allow the burners to fire for approximately 3 minutes.

Page 34

6 − Adjust the thermostat to deactivate the heating de-

mand and wait for the combustion air inducer to stop. At this point, the trap should be primed with sufficient water to ensure proper condensate drain operation.

BEFORE LIGHTING the unit, smell all around the furnace area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.

The gas valve on the G43UF is equipped with a gas control switch (lever). Use only your hand to move switch. Never use tools. If the the switch will not move by hand, do not try to repair it. Force or attempted repair may result in a fire or explosion.

Placing the furnace into operation:

G43UF units are equipped with an automatic hot surface ignition system. Do not

attempt to manually light burners on this furnace. 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 these units.

WARNING

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

Gas Valve Operation (Figures 45 and 46)

1 − STOP! Read the safety information at the beginning of

this section.

2 − Set the thermostat to the lowest setting.

3 − Turn off all electrical power to the unit.

4 − This furnace is equipped with an ignition device which

automatically lights the burners. Do not try to light the burners by hand.

5 − Remove the upper access panel.

6 − White Rodgers 36G Gas Valve − Move gas valve

switch to OFF. See figure 45 for White Rodgers 36G valve. Honeywell VR8205 Gas Valve − Move gas valve switch to OFF. See figure 46 for Honeywell VR8205 valve.

7 − Wait five 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.

8 − White Rodgers 36G Gas Valve − Move gas valve

switch to ON. See figure 45 for White Rodgers 36G valve. Honeywell VR8205 Gas Valve − Move gas valve switch to ON. See figure 46 for Honeywell VR8205 valve.

White Rodgers 36G Series Gas Valve

GAS VALVE SHOWN IN OFF POSITION

MANIFOLD PRESSURE

ADJUSTMENT

SCREW

(under cap)

OUTLET

PRESSURE

POST

INLET

PRESSURE

POST

FIGURE 45

GAS VALVE SHOWN IN ON POSITION

Honeywell VR8205 Gas Valve

MANIFOLD

PRESSURE

OUTLET

INLET

PRESSURE

PORT

MANIFOLD

PRESSURE

ADJUSTMENT

SCREW

(under

barbed

fitting)

FIGURE 46

9 − Replace the upper access panel.

10− Turn on all electrical power to to the unit.

11− Set the thermostat to desired setting.

NOTE − When unit is initially started, steps 1 through 11 may need to be repeated to purge air from gas line.

12− If the appliance will not operate, follow the instructions

Turning Off Gas to Unit" and call your service technician or gas supplier.

Turning Off Gas to Unit

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

performed. 3 − Remove the upper access panel. 4 − White Rodgers 36G Gas Valve − Move gas valve

switch to OFF.

Honeywell VR8205 Gas Valve − Move gas valve

switch to OFF. 5 − Replace the upper access panel.

Page 35

Heating Sequence Of Operation

When thermostat calls for heat, combustion air inducer

starts.

Combustion air pressure switch proves blower opera-

tion. Switch is factory set and requires no adjustment.

After a 15−second prepurge, the hot surface ignitor en-

ergizes.

After a 20−second ignitor warm−up period, the gas

valve solenoid opens.

Gas is ignited, flame sensor proves the flame, and the

combustion process continues.

If flame is not detected after first ignition trial, the igni-

tion control will repeat steps 3 and 4 four more times before locking out the gas valve (WATCHGUARD" flame failure mode). The ignition control will then automatically repeat steps 1 through 6 after 60 minutes.

To interrupt the 60−minute WATCHGUARD" period,

move thermostat from Heat" to OFF" then back to Heat". Heating sequence then restarts at step 1.

Gas Pressure Adjustment

Gas Flow (Approximate)

1 − Operate unit at least 15 minutes before checking gas

flow. Determine the time in seconds for one revolutions of gas through the meter. A portable LP gas meter (17Y44) is available for LP applications.

TABLE 8

Gas Flow Rate (Ft.

/Hr.)

Seconds for 1

Revolution

Gas Meter Size

1/2 cu ft Dial 1 cu ft Dial

10 180 360 12 150 300 14 129 257 16 113 225 18 100 200 20 90 180 22 82 164 24 75 150 26 69 138 28 64 129 30 60 120 32 56 113 34 53 106 36 50 100 38 47 95 40 45 90 42 43 86 44 41 82 46 39 78 48 38 75 50 36 72 52 35 69 54 33 67 56 32 64 58 31 62 60 30 60

2 − Compare the number of seconds and the gas meter

size in table 8 to determine the gas flow rate. Multiply the gas flow rate by the heating value to determine the unit input rate. If manifold pressure is correct and the unit input rate is incorrect, check gas orifices for proper size and restriction.

3 − Remove temporary gas meter if installed.

NOTE − To obtain accurate reading, shut off all other gas appliances connected to meter.

Gas Supply Pressure Measurement

A threaded plug on the inlet side of the gas valve provides access to the supply pressure tap. Remove the threaded plug, install a field−provided barbed fitting and connect a manometer to measure supply pressure. Replace the threaded plug after measurements have been taken.

Manifold Pressure Measurement

To correctly measure manifold pressure, the differential pressure between the positive gas manifold and the negative burner box must be considered. Use pressure test

adapter kit (available as Lennox part 10L34) to assist in measurement.

1 − Remove the threaded plug from the outlet side of the

gas valve and install a field−provided barbed fitting. Connect test gauge +" connection to barbed fitting to measure manifold pressure.

2 − Tee into the gas valve regulator vent hose and connect

test gauge −" connection.

3 − Start unit 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

NOTE − Shut unit off and remove manometer as soon as an accurate reading has been obtained. Take care to remove barbed fitting and replace threaded plug.

IMPORTANT

The White Rodgers 36G gas valve (figure 45) is equipped with pressure posts for measuring supply and manifold pressures. The posts provide built−in hose connections and have an integral 3/32" Allen− head screw. Rotate the screw counterclockwise one full turn to permit pressure measurement. Reseat the screw (rotate one full turn clockwise) after measurements have been taken to prevent gas leakage.

Page 36

High Altitude Information

NOTE − In Canada, certification for installations at elevations over 4500 feet (1372 m) is the jurisdiction of local authorities.

The manifold pressure may require adjustment to ensure proper operation at higher altitudes. Refer to table 9 for proper manifold pressure settings at varying altitudes. Table 10 lists required pressure switch changes and conversion kits at varying altitudes.

The combustion air pressure switches are factory−set and require no adjustment.

TABLE 9

Manifold Pressure (Outlet) inches w.c.

Fuel

Model

Input

Sizes

Altitude (feet)

0−

4500

4501−

5500

5501−

6500

6501−

7500

7501−

10,000

Nat. Gas

All

sizes

3.5 3.5 3.5 3.5 3.5*

L.P. Gas

All

sizes

10.0** 10.0** 10.0** 10.0** 10.0**

*Conversion kit required for applications at altitudes above 7501 ft. above sea level. **Conversion kit required for applications at all altitudes.

NOTE − A natural to L.P. propane gas changeover kit is necessary to convert this unit. Refer to the changeover kit installation instruction for the conversion procedure.

TABLE 10

Conversion Kit and Pressure Switch Requirements at Varying Altitudes

Input

High Altitude

Orifice Kit

Natural Gas Only

High Altitude Pressure

Switch Kit

LPG/Propane Kit

7501−10,000 ft. 4501−7500 ft. 7501−10,000 ft. 0−7500 ft. 7501−10,000 ft.

−045 44W51 − − − 95M22 83M74 83M75

−070 44W51 56M05 56M06 83M74 83M75

−090 44W51 75M20 56M07 83M74 83M75

−110 44W51 75M20 56M07 83M74 83M75

−135 44W51 56M04 60M35 83M74 83M75

Pressure switch is factory set. No adjustment necessary. All models use the factory installed pressure switch from 0−4500 feet (0−1370 m).

Page 37

Testing for Proper Venting and Sufficient Combustion Air for Non−Direct Vent Applications

WARNING

CARBON MONOXIDE POISONING HAZARD!

Failure to follow the steps outlined below for each appliance connected to the venting system being placed into operation could result in carbon monoxide poisoning or death. The following steps shall be followed for each appliance connected to the venting system being placed into operation, while all other appliances connected to the venting system are not in operation.

After the G43UF gas furnace has been started, the following test should be conducted to ensure proper venting and sufficient combustion air has been provided to the G43UF as well as to other gas-fired appliances which are separately vented.

If a G43UF furnace replaces a Category I 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.

The test should be conducted while all appliances (both in operation and those not in operation) are connected to the venting system being tested. If the venting system has been installed improperly, or if provisions have not been made for sufficient amounts of combustion air, corrections must be made as outlined in the previous section.

1 − Seal any unused openings in the venting system.

2 − Visually inspect the venting system for proper size and

horizontal pitch. Determine there is no blockage or restriction, leakage, corrosion, or other deficiencies which could cause an unsafe condition.

3 − To the extent that it is practical, close all building doors

and windows and all doors between the space in which the appliances connected to the venting system are lo-

cated and other spaces of the building. 4 − Close fireplace dampers. 5 − Turn on clothes dryers and any appliances not con-

nected to the venting system. Turn on any exhaust

fans, such as range hoods and bathroom exhausts, so

they will operate at maximum speed. Do not operate a

summer exhaust fan. 6 − Follow the lighting instruction to place the appliance

being inspected into operation. Adjust thermostat so

appliance will operate continuously. 7 − Use the flame of match or candle to test for spillage of

flue gases at the draft hood relief opening after 5 min-

utes of main burner operation. 8 − If improper venting is observed during any of the

above tests, the venting system must be corrected or

sufficient combustion/make-up air must be provided.

The venting system should be re-sized to approach

the minimum size as determined by using the ap-

propriate tables in appendix G in the current standards

of the National Fuel Gas Code ANSI−Z223.1/NPFA 54

in the U.S.A., and the appropriate Natural Gas and

Propane appliances venting sizing tables in the cur-

rent standard of the CSA−B149 Natural Gas and Pro-

pane Installation Codes in Canada. 9 − 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 gas-burning appliance to their previous

condition of use.

Page 38

Other Unit Adjustments

Primary Limit

The primary limit is located on the heating compartment vestibule panel. This limit is factory set and requires no adjustment.

Flame Rollout Switches (Two)

These manually reset switches are located on the burner box. If tripped, check for adequate combustion air before resetting.

Pressure Switch

The pressure switch is located in the heating compartment on the combustion air inducer. This switch checks for proper combustion air inducer operation before allowing ignition trial. The switch is factory−set and requires no adjustment.

Temperature Rise

After the furnace has been started and supply and return air temperatures have been allowed to stabilize, check the temperature rise. If necessary, adjust the blower speed to maintain the temperature rise within the range shown on the unit nameplate. Increase the blower speed to decrease the temperature. Decrease the blower speed to increase the temperature rise. Failure to adjust the temperature rise may cause erratic limit operation.

Fan Control

The fan on time of 45 seconds is not adjustable. The fan off delay(amount of time that the blower operates after the heat demand has been satisfied) may be adjusted by changing the jumper position across the five pins on the integrated control. The unit is shipped with a factory fan off setting of 90 seconds. The fan off delay affects comfort and is adjustable to satisfy individual applications. Adjust the fan off delay to achieve a supply air temperature between 90° and 110°F at the exact moment that the blower is de− energized. Longer off delay settings provide lower return air temperatures; shorter settings provide higher return air temperatures. See figure 47.

FAN-OFF TIME ADJUSTMENT

To adjust fan−off timing, reposition jumper across pins to

achieve desired setting.

FIGURE 47

Thermostat Heat Anticipation

Set the heat anticipator setting (if adjustable) according to the amp draw listed on the wiring diagram that is attached to the unit.

Electrical

1 − Check all wiring for loose connections. 2 − Check for the correct voltage at the furnace (furnace

operating).

3 − Check amp-draw on the blower motor.

Motor Nameplate__________Actual__________

NOTE − Do not secure the electrical conduit directly to the air ducts or structure.

Blower Speeds

NOTE − CFM readings are taken external to unit with a dry evaporator coil and without accessories.

Turn off electrical power to furnace. Remove blower access panel. Disconnect existing speed tap at control board speed

terminal.

NOTE − Termination of any unused motor leads must be insulated.

Refer to blower speed selection chart on unit wiring dia-

gram for desired heating or cooling speed. See Blower performance data beginning on Page 39.

Connect selected speed tap at control board speed

terminal. Resecure blower access panel. Turn on electrical power to furnace.

Electronic Ignition

The integrated control has an added feature of an internal Watchguard control. The feature serves as an automatic reset device for ignition control lockout caused by ignition failure. This type of lockout is usually due to low gas line pressure. After one hour of continuous thermostat demand for heat, the Watchguard will break and remake thermostat demand to the furnace and automatically reset the control to begin the ignition sequence.

Exhaust and Air Intake Pipe

1 − Check exhaust and air intake connections for tightness

and to make sure there is no blockage. 2 − Is pressure switch closed? Obstructed exhaust pipe

will cause unit to shut off at pressure switch. Check ter-

mination for blockages. 3 − Reset manual flame rollout switches on burner box

cover.

Failure To Operate

If the unit fails to operate, check the following: 1 − Is the thermostat calling for heat? 2 − Are access panels securely in place? 3 − Is the main disconnect switch closed? 4 − Is there a blown fuse? 5 − Is the filter dirty or plugged? Dirty or plugged filters will

cause the limit control to shut the unit off. 6 − Is gas turned on at the meter? 7 − Is the manual main shut-off valve open? 8 − Is the internal manual shut-off valve open? 9 − Is the unit ignition system in lock out? If the unit locks out

again, inspect the unit for blockages.

Page 39

Blower Motor Performance

G43UF−24B−045 PERFORMANCE (Less Filter)

External

Static

Pressure

in. w.g.

Air Volume / Watts at Different Blower Speeds

High

Medium−

High

Medium−

Low

cfm Watts cfm Watts cfm Watts cfm Watts

0.00

1125 425 900 360 745 295 690 265

0.10 1115 410 905 350 760 285 695 260

0.20 1090

395 895 335 755 280 685 255

0.30

1060 380 880 325 740 270 675 250

0.40 1020 365 860 315 720 260 665 240

0.50 970

345 835 300 700 255 640 230

0.60

920 335 795 290 665 240 600 220

0.70 860 315 730 270 620 230 565 215

0.80 760

295 665 250 560 215 510 200

0.90

675 275 585 230 495 200 465 175

G43UF−24B−070 PERFORMANCE (Less Filter)

External

Static

Pressure

in. w.g.

Air Volume / Watts at Different Blower Speeds

High

Medium−

High

Medium−

Low

cfm Watts cfm Watts cfm Watts cfm Watts

0.00

1115 435 875 360 720 290 665 255

0.10 1115 425 865 350 725 285 670 255

0.20 1100

415 870 335 730 280 665 250

0.30

1080 400 870 330 725 270 655 240

0.40 1050 385 855 320 715 265 645 240

0.50 1010

365 835 310 695 255 625 230

0.60

980 355 810 295 675 250 600 225

0.70 930 340 770 285 640 235 565 215

0.80 855

320 720 270 585 220 520 200

0.90

770 295 650 250 525 205 465 190

NOTES − All air data is measured external to unit without filter (not furnished − field provided).

G43UF−36B−070 PERFORMANCE (Less Filter)

External

Static

Pressure

in. w.g.

Air Volume / Watts at Different Blower Speeds

High

Medium−

High

Medium−

Low

cfm Watts cfm Watts cfm Watts cfm Watts

0.00

1640 660 1415 575 1160 485 1005 410

0.10 1600 635 1395 550 1160 460 1000 385

0.20 1540

605 1370 525 1160 445 995 375

0.30

1495 580 1345 505 1145 425 990 365

0.40 1420 545 1275 480 1125 395 965 345

0.50 1360

525 1245 450 1080 375 945 325

0.60

1275 490 1165 410 1025 350 900 305

0.70 1170 465 1085 385 965 335 860 295

0.80 1080

440 1010 360 865 310 775 270

0.90

945 400 840 320 765 275 710 245

G43UF−36C−090(H) PERFORMANCE (Less Filter)

External

Static

Pressure

Air Volume / Watts at Different Blower Speeds

High

Medium−

High

Medium−

Low

in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts

0.00

1630 745 1360 635 1125 540 975 440

0.10 1620 715 1365 610 1160 515 1000 430

0.20 1590

680 1365 580 1160 495 990 405

0.30

1550 655 1355 565 1170 475 985 395

0.40 1520 630 1330 545 1160 460 980 380

0.50 1465

605 1300 515 1140 440 960 360

0.60

1415 570 1250 490 1095 420 940 350

0.70 1350 545 1215 470 1065 400 905 335

0.80 1260

510 1140 440 1005 375 850 310

0.90

1165 475 1035 395 900 335 730 285

NOTES − All air data is measured external to unit without filter (not furnished − field provided).

Air volume based on bottom air return air. Actual air volume may vary on side return air applications.

G43UF−48C−090 PERFORMANCE (Less Filter)

External

Static

Pressure

in. w.g.

Air Volume / Watts at Different Blower Speeds

High

Medium−

High

Medium−

Low

cfm Watts cfm Watts cfm Watts cfm Watts

0.00

2180 930 1835 790 1520 630 1280 510

0.10 2135 885 1825 750 1510 610 1275 495

0.20 2085

840 1810 720 1505 580 1270 475

0.30

2030 800 1775 685 1500 565 1265 460

0.40 1940 760 1735 650 1480 535 1250 440

0.50 1865

725 1660 600 1430 505 1215 425

0.60

1740 670 1590 575 1380 475 1175 410

0.70 1645 640 1475 520 1290 450 1105 375

0.80 1540

600 1340 465 1175 405 1020 355

0.90

1335 540 1170 440 1070 375 950 330

G43UF−48C−110(H) PERFORMANCE (Less Filter)

External

Static

Pressure

in. w.g.

Air Volume / Watts at Different Blower Speeds

High

Medium−

High

Medium−

Low

cfm Watts cfm Watts cfm Watts cfm Watts

0.00

2160 880 1880 755 1490 602 1235 485

0.10 2100 850 1855 730 1480 585 1230 475

0.20 2035

805 1815 690 1475 560 1225 460

0.30

1965 750 1755 650 1475 545 1220 445

0.40 1885 725 1715 625 1465 510 1215 430

0.50 1780

680 1630 580 1420 490 1150 400

0.60

1690 660 1550 550 1360 460 1110 380

0.70 1575 620 1410 505 1210 405 1035 350

0.80 1375

550 1230 450 1125 380 970 325

0.90

1225 520 1120 415 1050 365 885 310

NOTES − All air data is measured external to unit without filter (not furnished − field provided).

Air volume based on bottom air return air. Actual air volume may vary on side return air applications.

Page 40

G43UF−60C−110 PERFORMANCE (Less Filter)

External

Static

Pressure

in. w.g.

Bottom Return Air, Side Return Air with Optional RAB Return Air Base, Return Air from Both Sides or Return Air from Bottom and One Side.

Single Side Return Air − Air volumes in bold require field

fabricated transition to accommodate 20 x 25 x 1 in. air filter in order to maintain proper air velocity.

Air Volume / Watts at Different Blower Speeds Air Volume / Watts at Different Blower Speeds

High Medium−High Medium−Low Low High Medium−High Medium−Low Low

cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts

0.00

2720 1385 2410 1090 2055 935 1620 710 2625 1350 2310 1080 1885 885 1515 700

0.10 2665 1355 2385 1075 2025 885 1730 735 2570 1330 2325 1060 1910 865 1575 700

0.20 2585

1315 2350 1015 2030 865 1680 690 2410 1305 2285 1035 1930 845 1620 690

0.30

2505 1275 2290 990 2025 840 1695 675 2425 1265 2230 990 1925 825 1635 675

0.40 2435 1250 2235 940 2030 830 1695 660 2335 1220 2175 950 1910 810 1640 660

0.50 2350

1205 2170 930 1975 790 1735 665 2270 1195 2120 935 1895 785 1640 640

0.60

2255 1185 2100 895 1915 765 1720 650 2170 1155 2045 885 1860 765 1630 630

0.70 2160 1150 2005 840 1865 730 1680 635 2110 1130 1950 855 1795 730 1590 610

0.80 2020

1090 1905 825 1810 710 1625 610 2035 1090 1885 820 1745 705 1540 580

0.90

1910 1050 1820 795 1705 675 1540 590 1900 1055 1760 780 1665 680 1470 565

G43UF−60D−135 PERFORMANCE (Less Filter)

External

Static

Pressure

in. w.g.

Bottom Return Air, Side Return Air with Optional RAB Return Air Base, Return Air from Both Sides or Return Air from Bottom and One Side.

Single Side Return Air − Air volumes in bold require field

fabricated transition to accommodate 20 x 25 x 1 in. air filter in order to maintain proper air velocity.

Air Volume / Watts at Different Blower Speeds Air Volume / Watts at Different Blower Speeds

High Medium−High Medium−Low Low High Medium−High Medium−Low Low

cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts

0.00

2730 1465 2425 1125 2055 915 1560 680 2665 1440 2325 1100 1865 890 1410 690

0.10 2670 1440 2400 1100 2065 890 1590 675 2615 1405 2310 1065 1915 865 1465 685

0.20 2600

1400 2365 1070 2045 865 1620 665 2530 1370 2280 1055 1925 850 1570 675

0.30

2525 1360 2315 1045 2035 845 1615 655 2470 1330 2235 1015 1920 825 1590 670

0.40 2445 1325 2260 1015 2020 820 1615 645 2380 1290 2175 985 1910 805 1590 655

0.50 2360

1280 2195 985 1960 790 1610 635 2310 1265 2120 965 1890 790 1595 645

0.60

2290 1255 2130 965 1900 755 1600 615 2200 1230 2055 935 1835 765 1580 630

0.70 2205 1220 2035 910 1825 730 1570 600 2120 1190 1970 900 1790 740 1545 605

0.80 2110

1195 1945 880 1765 710 1540 580 2025 1160 1890 875 1720 710 1515 590

0.90

1970 1120 1835 830 1680 690 1540 545 1930 1110 1800 835 1655 685 1440 570

Page 41

Service

WARNING

ELECTRICAL SHOCK, FIRE,

OR EXPLOSION HAZARD.

Failure to follow safety warnings exactly could result in dangerous operation, serious injury, death or property damage. Improper servicing could result in dangerous operation, serious injury, death, or property damage. Before servicing, disconnect all electrical power to furnace. When servicing controls, label all wires prior to disconnecting. Take care to reconnect wires correctly. Verify proper operation after servicing.

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

Blower

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

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 injury or death.

Filters

All G43UF filters are installed external to the unit. Filters should be inspected monthly. Clean or replace the filters when necessary to ensure proper furnace operation. Table 1 lists recommended filter sizes.

Exhaust and air intake pipes

Check the exhaust and air intake pipes and all connections for tightness and to make sure there is no blockage.

NOTE − After any heavy snow, ice or frozen fog event the furnace vent pipes may become restricted. Always check the vent system and remove any snow or ice that may be obstructing the plastic intake or exhaust pipes.

Electrical

1 − Check all wiring for loose connections. 2 − Check for the correct voltage at the furnace (furnace

operating).

3 − Check amp−draw on the blower motor.

Motor Nameplate__________Actual__________

Winterizing and Condensate Trap Care

1 − Turn off power to the unit.

2 − Have a shallow pan ready to empty condensate water.

3 − Remove the drain plug from the condensate trap and

empty water. Inspect the trap then reinstall the drain plug.

Cleaning Heat Exchanger

If cleaning the heat exchanger becomes necessary, follow the below procedures and refer to figure 1 when disassembling unit. Use papers or protective covering in front of furnace while removing heat exchanger assembly.

1 − Turn off electrical and gas supplies to the furnace. 2 − Remove the upper and lower furnace access panels. 3 − Mark all gas valve wires and disconnect them from

valve.

4 − Remove gas supply line connected to gas valve. Re-

move gas valve/manifold assembly.

5 − Remove sensor wire from sensor. Disconnect 2-pin

plug from the ignitor. 6 − Disconnect wires from flame roll−out switches. 7 − Remove burner box cover and remove four burner box

screws at the vestibule panel and remove burner box.

Set burner box assembly aside.

NOTE − If necessary, clean burners at this time. Follow

procedures outlined in Burner Cleaning section.

8 − Loosen three clamps and remove flexible exhaust tee. 9 − Remove 3/8 inch rubber cap from condensate drain

trap and drain. Replace cap after draining. 10 − Disconnect condensate drain line from the conden-

sate trap. Remove condensate trap (it may be neces-

sary to cut drain pipe). Remove screws that secure

condensate collars to either side of the furnace and re-

move collars. Remove drain tubes from cold end

header collector box. 11 − Disconnect condensate drain tubing from flue collar.

Remove screws that secure both flue collars into

place. Remove flue collars. It may be necessary to cut

the exiting exhaust pipe for removal of the fittings. 12 − Disconnect the 2-pin plug from the combustion air in-

ducer. Remove four screws which secure combustion

air inducer to collector box Remove combustion air in-

ducer assembly. Remove ground wire. 13 − Mark and disconnect all combustion air pressure tub-

ing from cold end header collector box. 14 − Mark and remove wires from pressure switch. Re-

move pressure switch. Keep tubing attached to pres-

sure switch. 15 − Remove electrical junction box from the side of the fur-

nace. 16 − Mark and disconnect any remaining wiring to heating

compartment components. Disengage strain relief

bushing and pull wiring and bushing through the hole in

the blower deck. 17 − Remove the primary limit from the vestibule panel. 18 − Remove two screws from the front cabinet flange at

the blower deck. Spread cabinet sides slightly to allow

clearance for removal of heat exchanger.

Page 42

19 − Remove screws along vestibule sides and bottom

which secure vestibule panel and heat exchanger assembly to cabinet. Remove two screws from blower rail which secure bottom heat exchanger flange. Remove heat exchanger from furnace cabinet.

20 − Back wash heat exchanger with soapy water solution

or steam. If steam is used it must be below 275°F

(135°C) .

21 − Thoroughly rinse and drain the heat exchanger. Soap

solutions can be corrosive. Take care to rinse entire assembly.

22 − Reinstall heat exchanger into cabinet making sure that

the clamshells of the heat exchanger assembly are resting on the support located at the rear of the cabinet. Remove the indoor blower to view this area through the blower opening.

23 − Re-secure the supporting screws along the vestibule

sides and bottom to the cabinet.

24 − Reinstall cabinet screws on front flange at blower

deck. 25 − Reinstall the primary limit on the vestibule panel. 26 − Route heating component wiring through hole in blow-

er deck and reinsert strain relief bushing. 27 − Reinstall pressure switch and reconnect pressure

switch wiring. 28 − Carefully connect combustion air pressure switch

hosing from pressure switch to proper stubs on cold

end header collector box. 29 − Reinstall condensate collars on each side of the fur-

nace. Reconnect drain tubing to collector box. 30 − Reinstall condensate trap on same side as exhaust

pipe. Reconnect condensate drain line to the conden-

sate trap. 31 − Reinstall electrical junction box. 32 − Reinstall the combustion air inducer. Reconnect the

2−pin plug to the wire harness. 33 − Use securing screws to reinstall flue collars to either

side of the furnace. Reconnect exhaust piping and ex-

haust drain tubing. 34 − Replace flexible exhaust tee on combustion air induc-

er and flue collars. Secure using three existing hose

clamps. 35 − Reinstall burner box assembly in vestibule area. 36 − Reconnect flame roll−out switch wires. 37 − Reconnect sensor wire and reconnect 2−pin plug from

ignitor.

38 − Secure burner box assembly to vestibule panel using

four existing screws. Make sure burners line up in

center of burner ports.

39 − Reinstall gas valve manifold assembly. Reconnect

gas supply line to gas valve. 40 − Reinstall burner box cover. 41 − Reconnect wires to gas valve. 42 − Replace the blower compartment access panel. 43 − Refer to instruction on verifying gas and electrical con-

nections when re−establishing supplies. 44 − Follow lighting instructions to light and operate fur-

nace for 5 minutes to ensure that heat exchanger is

clean and dry and that furnace is operating properly. 45 − Replace heating compartment access panel.

Cleaning the Burner Assembly

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

Remove upper and lower furnace access panels. 2 − Mark all gas valve wires and disconnect them from the

valve. 3 − Disconnect the gas supply line from the gas valve. Re-

move gas valve/manifold assembly. 4 − Mark and disconnect sensor wire from the sensor. Dis-

connect 2-pin plug from the ignitor at the burner box. 5 − Remove burner box cover and remove four screws

which secure burner box assembly to vest panel. Re-

move burner box from the unit. 6 − Use the soft brush attachment on a vacuum cleaner to

gently clean the face of the burners. Visually inspect

the inside of the burners and crossovers for any block-

age caused by foreign matter. Remove any blockage. 7 − Reconnect the sensor wire and reconnect the 2−pin

plug to the ignitor wiring harness. 8 − Reinstall the burner box assembly using the existing

four screws. Make sure that the burners line up in the

center of the burner ports. 9 − Reinstall the gas valve manifold assembly. Reconnect

the gas supply line to the gas valve. Reinstall the burn-

er box cover. 10 − Reconnect the gas valve wires to the gas valve. 11 − Replace the blower compartment access panel. 12 − Refer to instruction on verifying gas and electrical con-

nections when re−establishing supplies. 13 − Follow lighting instructions to light and operate fur-

nace for 5 minutes to ensure that heat exchanger is

clean and dry and that furnace is operating properly. 14 − Replace heating compartment access panel.

Page 43

Planned Service

A service technician should check the following items during an annual inspection. Power to the unit must be shut off for safety.

Fresh air grilles and louvers (on the unit and in the room where the furnace is installed) − Must be open and unobstructed to provide combustion air.

Burners − Must be inspected for rust, dirt, or signs of water.

Vent pipe − Must be inspected for signs of water, cracked,

damaged or sagging pipe, or disconnected joints.

Unit appearance − Must be inspected for rust, dirt, signs of water, burnt or damaged wires, or components.

Blower access door − Must be properly in place and provide a seal between the return air and the room where the furnace is installed.

Return air duct − Must be properly attached and provide an air seal to the unit.

Operating performance − Unit must be observed during operation to monitor proper performance of the unit and the vent system.

Combustion gases − Flue products must be analyzed and compared to the unit specifications.

Problems detected during the inspection may make it necessary to temporarily shut down the furnace until the items can be repaired or replaced.

Instruct the homeowners to pay attention to their furnace. Situations can arise between annual furnace in-

spections that may result in unsafe operation. For instance, items innocently stored next to the furnace may obstruct the combustion air supply. This could cause incomplete combustion and the production of carbon monoxide gas.

Ignition Control Board Diagnostic Codes

DIAGNOSTIC CODES

Make sure to Identify LED’S Correctly.

LED #1 (Red) LED #2 (Green) DESCRIPTION

SIMULTANEOUS

SLOW FLASH

SIMULTANEOUS

SLOW FLASH

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

SIMULTANEOUS

FAST FLASH

SIMULTANEOUS

FAST FLASH

Normal operation − signaled when heating demand initiated at thermostat.

SLOW FLASH ON

Primary or secondary limit switch open. Limit must close within 3 minutes or unit goes into 1 hour Watchguard.

OFF SLOW FLASH

Pressure prove switch open. OR: Blocked inlet/exhaust vent; OR: Pressure switch closed prior to activation of combustion air inducer.

ALTERNATING

SLOW FLASH

ALTERNATING

SLOW FLASH

Watchguard −− burners failed to ignite or lost flame 5 times during single heating demand.

SLOW FLASH OFF Flame sensed without gas valve energized.

ON SLOW FLASH Rollout switch open. OR: 12-pin connector improperly attached.

OFF

Circuit board failure or control wired incorrectly.

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

SLOW FLASH FAST FLASH Low flame signal. Measures below 1.5 microamps. Replace flame sense rod.

ALTERNATING

FAST FLASH

ALTERNATING

FAST FLASH

Improper main ground. OR: Line voltage below 90 volts.

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 = 0.5 microAmps.

Page 44

Troubleshooting: Heating Sequence of Operation

HEATING SEQUENCE OF OPERATION

NORMAL HEATING MODE

ABNORMAL HEATING MODE

CONTROL SELF−CHECK OKAY?

BURNER OFF?

(CONTINUOUS FLAME CHECK)

NORMAL OPERATION:

LED #1 −− SLOW FLASH LED #2 −− SLOW FLASH

YES

GAS VALVE OFF. COMBUSTION AIR INDUCER OFF.

INDOOR BLOWER DELAY OFF.

LED #1 ON LED #2 ON

(RESET CONTROL BY TURNING MAIN POWER OFF.)

POLARITY REVERSED.

LED #1 −− FAST FLASH

LED #2 −− SLOW FLASH

POWER ON

IS POLARITY CORRECT?

ROLLOUT SWITCH CLOSED?

THERMOSTAT CALLS FOR HEAT:

LED #1 −− FAST FLASH LED #2 −− FAST FLASH

IS COMBUSTION AIR

PRESSURE SWITCH OPEN?

GAS VALVE OFF. COMBUSTION AIR INDUCER ON.

INDOOR BLOWER ON.

LED #1 −− ON. LED #2 −− SLOW FLASH.

SEQUENCE HOLDS UNTIL ROLLOUT SWITCH CLOSES

AND POWER IS RESET OR T’STAT IS INTERRUPTED

FOR MINIMUM OF 1 SECOND.

GAS VALVE OFF. COMBUSTION AIR INDUCER ON.

INDOOR BLOWER ON HEATING SPEED.

LED #1 −− SLOW FLASH

LED #2 −− OFF

GAS VALVE OFF.

COMBUSTION AIR INDUCER OFF.

INDOOR BLOWER OFF WITH DELAY.

LED #1 OFF

LED #2 SLOW FLASH

(Sequence holds until pressure switch

opens or thermostat resets control.)

YES

IS VOLTAGE

ABOVE 90 VOLTS?

LEDs SIGNAL FAST ALTERNATING FLASH.

CONTROL WILL NOT RESPOND TO A CALL FOR

HEATING UNTIL VOLTAGE RISES ABOVE 95 VOLTS.

IS COMBUSTION AIR INDUCER

ENERGIZED?

HAS COMBUSTION AIR PRESSURE

SWITCH CLOSED IN 2.5 MINUTES?

YES

PRESSURE SWITCH IS IN WATCHGUARD MODE.

GAS VALVE OFF. COMBUSTION AIR INDUCER OFF.

INDOOR BLOWER OFF WITH DELAY.

LED #1 −− OFF. LED #2 −− SLOW FLASH.

IS 5-MINUTE RESET PERIOD COMPLETE?

PRIMARY AND SECONDARY LIMIT SWITCH.

CLOSED?

YES

CONTINUED NEXT PAGE

COMBUSTION AIR INDUCER OFF.

INDOOR BLOWER ON

LED #1 SLOW FLASH RATE

LED #2 −− ON

YES

IS THERE A PROPER GROUND?

YES

IMPROPER GROUND. LED #1 −− ALTERNATING FAST FLASH LED #2 −− ALTERNATING FAST FLASH

YES

Page 45

Troubleshooting: Heating Sequence of Operation (Continued)

HEATING SEQUENCE CONTINUED

NORMAL HEATING MODE ABNORMAL HEATING MODE

FLAME RECTIFICATION CURRENT

CHECK. CAN FLAME BE PROVEN WITHIN

4 SECONDS AFTER GAS VALVE OPENS?

(0.5 microamps)

FLAME PRESENT?

INDOOR BLOWER ON

AFTER 45−SECOND DELAY

PRIMARY AND SECONDARY LIMIT

SWITCHES CLOSED?

COMBUSTION AIR PRESSURE

SWITCH CLOSED?

LOW FLAME SIGNAL

(Does not affect operation of control)

LED #1 −− SLOW FLASH

LED #2 −− FAST FLASH

GAS VALVE DE−ENERGIZED.

COMBUSTION AIR INDUCER DE−ENERGIZED.

INDOOR BLOWER ON UNTIL SWITCH CLOSES.

LED #1 −− SLOW FLASH. LED #2 −− ON.

IS LIMIT SWITCH CLOSED?

GAS VALVE DE−ENERGIZED.

COMBUSTION AIR INDUCER ON.

INDOOR BLOWER OFF WITH DELAY

LED #1 −− OFF. LED #2 −− SLOW FLASH.

HAS CAB SWITCH CLOSED IN 2.5 MINUTES?

15-SECOND COMBUSTION AIR INDUCER PREPURGE

INITIATED BY CLOSED PRESSURE SWITCH.

YES

IGNITOR WARM-UP −− 20 SECONDS.

YES

4-SECOND TRIAL FOR IGNITION.

GAS VALVE OPENS. IGNITOR ENERGIZED FOR

UP TO 4 SECONDS.

YES

FLAME STABILIZATION PERIOD.

GAS VALVE OFF. COMBUSTION AIR INDUCER ON.

INDOOR BLOWER OFF. HAS CONTROL FAILED TO SENSE FLAME FOR FIVE CONSECUTIVE TRIES DURING A SINGLE

HEAT DEMAND?

WATCHGUARD MODE. GAS VALVE OFF.

COMBUSTION AIR INDUCER OFF.

INDOOR BLOWER OFF WITH DELAY

LEDs SIGNAL WATCHGUARD FAILURE CODE.

IS 60-MINUTE RESET PERIOD COMPLETE?

YES

4 SECONDS

YES

HAS CONTROL RESET IGNITION

SEQUENCE FOUR TIMES?

FLAME SIGNAL 1.5 MICROAMPS OR GREATER?

YES

ROLLOUT SWITCH CLOSED?

GAS VALVE POWER OFF.

COMBUSTION AIR INDUCER POWER ON.

INDOOR BLOWER ON

LED #1 −− ON. LED #2 −− SLOW FLASH.

SEQUENCE HOLDS UNTIL ROLLOUT SWITCH IS RESET

AND MAIN POWER IS INTERRUPTED OR

THERMOSTAT IS CYCLED OFF/ON FOR 1 SEC. MINIMUM.

YES

THERMOSTAT DEMAND SATISFIED.

LED #1 & #2 SIMULTANEOUS SLOW FLASHES.

COMB. AIR INDUCER CONTINUES 5-SECOND

POST PURGE AFTER T’STAT DEMAND IS SATISFIED.

INDOOR AIR BLOWER COMPLETES SELECTED OFF"

DELAY BEFORE SHUTTING OFF.

YES

5-MINUTE PRESSURE SWITCH

WATCHGUARD MODE.

YES

IS VOLTAGE ABOVE 90 VOLTS?

LEDS SIGNAL

ALTERNATING

FAST FLASH UNTIL

VOLTAGE IS ABOVE

95 VOLTS, THEN

RESTARTS HEATING

SEQUENCE.

YES

HAS PRIMARY / SECONDARY

LIMIT RESET TIME

EXCEEDED 3 MINUTES?

LIMIT SWITCH WATCHGUARD MODE. GAS VALVE, COMB. AIR INDUCER AND INDOOR BLOW-

ER OFF. LEDs SIGNAL LIMIT SWITCH OPEN UNTIL MAIN

POWER IS

INTERRUPTED OR

T’STAT IS CYCLED

OFF/ON FOR 1 SEC.

MINIMUM. 60−MINUTE

WATCHGUARD PE-

RIOD STARTS AT

TIME LIMIT CLOSES.

IS 60−MIN. PERIOD

COMPLETE?

YES

Page 46

Troubleshooting: Cooling Sequence of Operation

COOLING SEQUENCE OF OPERATION

NORMAL COOLING MODE ABNORMAL COOLING MODE

IGNITION CONTROL MAIN POWER ON.

CONTROL SELF DIAGNOSTIC CHECK.

IS CONTROL OPERATING NORMALLY?

YES

SIGNAL POLARITY REVERSED AT LED. CONTROL

WILL CONTINUE TO CALL FOR COOLING IN THIS

CONDITION.

POWER ON

GAS VALVE OFF. COMBUSTION AIR INDUCER OFF.

INDOOR BLOWER OFF WITH NORMAL DELAY.

SIGNAL CIRCUIT BOARD FAILURE AT LED.

INTERRUPT MAIN POWER TO RESET CONTROL.

YES

IS POLARITY CORRECT?

ROLLOUT SWITCH MONITORED CONTINUOUSLY.

IS ROLLOUT SWITCH CLOSED?

LED: SLOW FLASH RATE REMAINS UNCHANGED

THROUGHOUT COOLING CYCLE.

THERMOSTAT CALLS FOR COOLING.

COMPRESSOR CONTACTOR AND SYSTEM FAN

ENERGIZED WITH 2-SECOND DELAY

(COOLING SPEED). EAC TERM. ENERGIZED.

COMPRESSOR OFF.

THERMOSTAT OPENS.

SYSTEM FAN AND EAC TERM. OFF

WITH 0-SECOND DELAY.

GAS VALVE OFF. COMBUSTION AIR INDUCER ON.

INDOOR BLOWER ON.

SIGNAL ROLL-OUT SWITCH OPEN AT LED.

SEQUENCE HOLDS UNTIL ROLLOUT SWITCH CLOSES

AND MAIN POWER IS INTERRUPTED OR THERMOSTAT

IS CYCLED OFF/ON FOR 1 SEC. MINIMUM.

IS VOLTAGE

ABOVE 90 VOLTS?

LED SIGNALS LOW VOLTAGE. CONTROL WILL

CONTINUE TO CALL FOR COOLING

IN THIS CONDITION.

YES

IS THERE A PROPER GROUND?

YES

SIGNAL IMPROPER GROUND AT LED.

CONTROL WILL CONTINUE TO CALL FOR COOLING

IN THIS CONDITION.

Page 47

Troubleshooting: Continuous Fan Sequence of Operation

CONTINUOUS HEAT SPEED FAN SEQUENCE OF OPERATION

LED: SLOW FLASH RATE REMAINS

UNCHANGED THROUGHOUT SEQUENCE.

MANUAL FAN SELECTION MADE AT THERMOSTAT.

CONTROL (G) ENERGIZES SYSTEM FAN AT HEAT

SPEED. EAC TERMINAL IS ENERGIZED.

THERMOSTAT CALLS FOR HEAT (W).

THERMOSTAT CALLS FOR COOLING.

THERMOSTAT OPENS.

SYSTEM FAN SWITCHED TO COOL SPEED.

EAC TERM. REMAINS ON.

THERMOSTAT OPENS.

MANUAL FAN SELECTION MADE AT THERMOSTAT.

CONTROL (G) ENERGIZES SYSTEM FAN AT HEAT

SPEED. EAC TERM. ENERGIZED.

YES

HUM TERM. ENERGIZES

WITH COMB. AIR INDUCER.

SYSTEM FAN REMAINS ON

HEATING SPEED.

SYSTEM FAN REMAINS ON

HEATING SPEED.

HUM TERM. DE−ENERGIZES

WITH COMB. AIR INDUCER

Repair Parts List

The following repair parts are available through Lennox dealers. When ordering parts, include the complete furnace model number listed on the CSA nameplate −− Example: G43UF−24B−045−3. All service must be performed by a licensed pro-

fessional installer (or equivalent), service agency, or gas supplier.

Cabinet Parts

Upper access panel Blower access panel Top Cap

Control Panel Parts

Transformer Integrated control board Door interlock switch

Blower Parts

Blower wheel Motor Motor mounting frame Motor capacitor Blower housing cutoff plate

Heating Parts

Flame Sensor

Heat exchanger assembly Gas manifold Combustion air inducer Gas valve Main burner cluster Main burner orifices Pressure switch Ignitor Primary limit control Flame rollout switches Combustion air inducer auxiliary limit

Page 48

Vent Pipe Sizing Worksheet

Proposed vent pipe size : ______

Termination kit catalog number : _____________ Vent pipe equivalency value from table 3 : ______

Total number of 90° elbows required (indoors and outdoors) ______ X 5 = ______ equivalent feet of pipe

Total number of 45° elbows required (indoors and outdoors) ______ X 2.5 = ______ equivalent feet of pipe

Linear feet of straight pipe required : ______

Add equivalent feet of vent pipe listed in steps 2 through 5.

Step 1

Step 2

Step 3

Step 4

Step 5

Step 6

If the total is equal to, or less than, the allowable maximum given in table 5, the proposed pipe size is acceptable. If the total exceeds the maximum allowed vent pipe length, repeat the process above using the next larger diameter pipe until an acceptable total is achieved.

NOTE − In Direct Vent systems, total the equivalent length of either the exhaust OR intake piping run, depending upon which will be LONGER. Intake and exhaust pipe diameter must be the same size and must be terminated in the same pressure zone. Intake and exhaust pipe should be roughly the same length.

Equivalent Feet

TOTAL

Page 49

Start−Up & Performance Check List

Gas Supply Pressure

SUPPLY

AIR

Line Voltage

GAS SUPPLY

Natural Gas

LP Propane Gas

Piping Connections Tight

Leak Tested

Supply Line Pressure W.C.________

INTAKE / EXHAUST PIPE

All Joints Primed and Glued

Terminations Installed Properly

Pipes Supported

Condensate Trap Primed / Line Sloped

Heat Cable Installed and Operable (if applicable)

Horizontal Pipes Sloped (if applicable)

UNIT SET UP

Flter

RETURN AIR

Furnace: Model Number_______________

Serial Number_________________

DUCT SYSTEM

SUPPLY AIR DUCT

Sealed

Insulated (if necessary)

RETURN DUCT

Sealed

Filter Installed and Clean

Grilles Unobstructed

CONTROL BOARD

DIP Switches Set

Appropriate Links in Place

VOLTAGE CHECK

Supply Voltage _____

Electrical Connections Tight

Page 50

Contractor’s: Name_________________________Telephone_____________Checklist Completed____________________

Job Address_____−________________________________Technician’s Name___________________________________

HEATING MODE

GAS MANIFOLD PRESSURE W.C._____

COMBUSTION SAMPLE CO

2%______

CO PPM_______

INDOOR BLOWER AMPS______

TEMPERATURE RISE

Supply Duct Temperature ________ Return Duct Temperature

_____

Temperature Rise = ________

TOTAL DUCT STATIC

Supply Duct Static _______

Return Duct Static + ______

Total Static = _______

CONDENSATE LINE

Leak Free

VENT PIPE

Leak Free

COOLING MODE

INDOOR BLOWER AMPS______

TEMPERATURE DROP

Return Duct Temperature _________ Supply Duct Temperature

_ _______

Temperature Drop = _________

TOTAL DUCT STATIC (dry coil)

Total Static = ________

DRAIN LINE

Leak Free

THERMOSTAT

Adjusted and Programmed

Explained Operation to Owner

SUPPLY

AIR

Blower Motor Amps

Duct Static

Thermostat

Gas Manifold Pressure

Temperatures

RETURN AIR

Combustion CO

UNIT OPERATION

Page 51

Requirements for Commonwealth of Massachusetts

Modifications to NFPA−54, Chapter 10

Revise NFPA−54 section 10.8.3 to add the following requirements:

For all side wall, horizontally vented, gas−fueled equipment installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above the finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied:

1 − INSTALLATION OF CARBON MONOXIDE DETEC-

TORS. At the time of installation of the side wall, horizontally vented, gas−fueled equipment, the installing plumber or gasfitter shall observe that a hard−wired carbon monoxide detector with an alarm and battery backup is installed on the floor level where the gas equipment is to be installed. In addition, the installing plumber or gasfitter shall observe that a battery−operated or hard−wired carbon monoxide detector with an alarm is installed on each additional level of the dwelling, building or structure served by the side wall, horizontally vented, gas−fueled equipment. It shall be the responsibility of the property owner to secure the services of qualified licensed professionals for the installation of hard−wired carbon monoxide detectors.

a − In the event that the side wall, horizontally vented,

gas−fueled equipment is installed in a crawl space or an attic, the hard−wired carbon monoxide detector with alarm and battery back−up may be installed on the next adjacent floor level.

b − In the event that the requirements of this subdivi-

sion cannot be met at the time of completion of installation, the owner shall have a period of thirty (30) days to comply with the above requirements; provided, however, that during said thirty (30) day period, a battery−operated carbon monoxide detector with an alarm shall be installed.

2 − APPROVED CARBON MONOXIDE DETECTORS.

Each carbon monoxide detector as required in accordance with the above provisions shall comply with NFPA 720 and be ANSI/UL 2034 listed and IAS certified.

3 − SIGNAGE. A metal or plastic identification plate shall

be permanently mounted to the exterior of the building at a minimum height of eight (8) feet above grade directly in line with the exhaust vent terminal for the horizontally vented, gas−fueled heating appliance or equipment. The sign shall read, in print size no less than one−half (1/2) inch in size, GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS."

4 − INSPECTION. The state or local gas inspector of the

side wall, horizontally vented, gas−fueled equipment shall not approve the installation unless, upon inspection, the inspector observes carbon monoxide detectors and signage installed in accordance with the provisions of 248 CMR 5.08(2)(a) 1 through 4.

EXEMPTIONS: The following equipment is exempt from 24 CMR 5.08(2)(a) 1 through 4:

1 − The equipment listed in Chapter 10 entitled Equip-

ment Not Required to Be Vented" in the most current edition of NFPA 54 as adopted by the Board; and

2 − Product Approved side wall, horizontally vented, gas−

fueled equipment installed in a room or structure separate from the dwelling, building or structure used in whole or in part for residential purposes.

MANUFACTURER REQUIREMENTS − GAS EQUIPMENT VENTING SYSTEM PROVIDED.

When the manufacturer of Product Approved side wall, horizontally vented, gas−fueled equipment provides a venting system design or venting system components with the equipment, the instructions provided by the manufacturer for installation of the equipment and the venting system shall include:

1 − Detailed instructions for the installation of the venting

system design or the venting system components: and

2 − A complete parts list for the venting system design or

venting system.

MANUFACTURER REQUIREMENTS − GAS EQUIPMENT VENTING SYSTEM NOT PROVIDED.

When the manufacturer of Product Approved side wall, horizontally vented, gas−fueled equipment does not provide the parts for venting the flue gases, but identifies special venting systems," the following requirements shall be satisfied by the manufacturer:

1 − The referenced special venting system" instructions

shall be included with the appliance or equipment installation instructions; and

2 The special venting systems" shall be Product Ap-

proved by the Board, and the instructions for that system shall include a parts list and detailed installation instructions.

A copy of all installation instructions for all Product Approved side wall, horizontally vented, gas−fueled equipment, all venting instructions, all parts lists for venting instructions, and/or all venting design instructions shall remain with the appliance or equipment at the completion of the installation.

Lennox G43UF−36C−090, G43UF−24B−045, G43UF−36C−090H, G43UF−48C−090, G43UF−48C−110 Installation Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual