Bryant Series E F 310Aav Users Manual II310A 45 14

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Installation, Start--Up Operating and

Service and Maintenance Instructions

Series E/F

310AAV/JAV

SINGLE--STAGE DELUXE, INDUCED--COMBUSTION

4--WAY MULTIPOISE GAS FURNACE

SAFETY CONSIDERATIONS 2........................

INTRODUCTION 3..................................

CODES AND STANDARDS 4..........................

Safety 4.........................................

General Installation 4...............................

Combustion and Ventilation Air 4.....................

Duct Systems 5...................................

Acoustical Lining and Fibrous Glass Duct 5.............

Gas Piping and Gas Pipe Pressure Testing 5.............

Electrical Connections 5............................

Venting 5........................................

LOCATION 5.......................................

AIR FOR COMBUSTION AND VENTILATION 7.........

INSTALLATION 10..................................

Bottom Return Air Inlet 10..........................

Side Return Air Inlet 10.............................

Leveling Legs (If Desired) 11........................

Bottom Return Air Inlet 12..........................

Suspended Furnace Support 12.......................

Platform Furnace Support 12.........................

Roll--Out Protection 12.............................

Bottom Return Air Inlet 12..........................

Side Return Air Inlet 12.............................

General Requirements 13............................

Ductwork Acoustical Treatment 13....................

Supply Air Connections 13..........................

Return Air Connections 19..........................

115--V Wiring 21..................................

J--box Relocation 21...............................

Electrical Connection to J--Box 21.....................

Power Cord Installation in Furnace J--Box 22............

BX Cable Installation in Furnace J--Box 22..............

24--V Wiring 24...................................

Accessories 24....................................

General Venting Requirements 24.....................

Masonry Chimney Requirements 25...................

Appliance Application Requirements 27................

Sidewall Venting 27................................

START--UP, ADJUSTMENT, AND SAFETY CHECK 32.....

General 32.......................................

Start--Up Procedures 32.............................

Adjustments 37...................................

Check Safety Controls 37...........................

Checklist 38......................................

SERVICE AND MAINTENANCE PROCEDURES 43.......

Introduction 43...................................

Care and Maintenance 44...........................

Sequence of Operation 47...........................

Wiring Diagrams 48...............................

Troubleshooting 48................................

Accessory listing 51

................................

PARTS REPLACEMENT INFORMATION GUIDE 52.......

D

E

S

I

G

N

C

E

R

T

I

F

I

E

D

REGISTERED

ISO 9001:2000

Always Ask For

Use of the AHRI Certified TM Mark indicates a

manufacturer’s participation in the program. For

verification of certification for individual products,

go to www.ahridirectory.org.

NOTE: Read the entire instruction manual before starting the

installation.

Portions of the text and tables are reprinted from NFPA 54/ANSI

Z223.1--2009E, with permission of Nation Fire Protection

Association, Quincy, MA 02269 and American Gas Association,

Washington DC 20001. This reprinted material is not the

complete and official position of the NFPA or ANSI on the

referenced subject, which is represented only by the standard in

its entirely.

2

SAFETY CONSIDERATIONS

FIRE, EXPLOSION, ELECTRICAL SHOCK, AND

CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in personal

injury, death, or property damage.

Improper installation, adjustment, alteration, service,

maintenance, or use can cause carbon monoxide poisoning,

explosion, fire, electrical shock, or other conditions which

may cause personal injury or property damage. Consult a

qualified service agency, local gas supplier, or your

distributor or branch for information or assistance. The

qualified service agency must use only factory--authorized

and listed kits or accessories when modifying this product.

!WARNING

FURNACE RELIABILITY HAZARD

Failure to follow this caution may result in unit component

damage.

Application of this furnace should be indoors with special

attention given to vent sizing and material, gas input rate,

air temperature rise, unit leveling, and unit sizing.

CAUTION

!

CUT HAZARD

Failure to follow this caution may result in personal injury.

Sheet metal parts may have sharp edges or burrs. Use care

and wear appropriate protective clothing, safety glasses and

gloves when handling parts, and servicing furnaces.

CAUTION

!

Improper installation, adjustment, alteration, service,

maintenance, or use can cause explosion, fire, electrical shock, or

other conditions which may cause death, personal injury, or

property damage. Consult a qualified installer, service agency, or

your distributor or branch for information or assistance. The

qualified installer or agency must use factory--authorized kits or

accessories when modifying this product. Refer to the individual

instructions packaged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses, protective clothing,

and work gloves. Have a fire extinguisher available. Read these

instructions thoroughly and follow all warnings or cautions

include in literature and attached to the unit. Consult local

building codes, the current editions of the National Fuel Gas

Code (NFGC) NFPA 54/ANSI Z223.1 and the National

Electrical Code (NEC) NFPA 70.

Recognize safety information. This is the safety--alert symbol .

When you see this symbol on the unit and in instructions or

manuals, be alert to the potential for personal injury.

Understand the signal words DANGER,WARNING,and

CAUTION. These words are used with the safety--alert symbol.

DANGER identifies the most serious hazards which will result in

severe personal injury or death. WARNING signifies hazards

which could result in personal injury or death. CAUTION is

used to identify unsafe practices which may result in minor

personal injury or product and property damage. NOTE is used

to highlight suggestions which will result in enhanced

installation, reliability, or operation.

1. Use only with type of gas approved for this furnace. Refer

to the furnace rating plate.

2. Install this furnace only in a location and position as spe-

cified in the “Location” section of these instructions.

3. Provide adequate combustion and ventilation air to the

furnace space as specified in “Air for Combustion and

Ventilation” section.

4. Combustion products must be discharged outdoors. Con-

nect this furnace to an approved vent system only, as spe-

cified in the “Venting” section of these instructions.

5. Never test for gas leaks with an open flame. Use a com-

mercially available soap solution made specifically for the

detection of leaks to check all connections, as specified in

the “Gas Piping” section.

6. Always install furnace to operate within the furnace’s in-

tended temperature--rise range with a duct system which

has an external static pressure within the allowable range,

as specified in the “Start--Up, Adjustments, and Safety

Check” section. See furnace rating plate.

7. When a furnace is installed so that supply ducts carry air

circulated by the furnace to areas outside the space con-

taining the furnace, the return air shall also be handled by

duct(s) sealed to the furnace casing and terminating out-

side the space containing the furnace. See “Air Ducts” sec-

tion.

8. A gas--fired furnace for installation in a residential garage

must be installed as specified in the warning box in the

“Location” section.

9. The furnace may be used for construction heat provided

that the furnace installation and operation complies with

the first CAUTION in the LOCATION section of these in-

structions.

10. These Multipoise Gas--Fired Furnaces are CSA (formerly

A.G.A. and C.G.A.) design--certified for use with natural

and propane gases (see furnace rating plate) and for install-

ation in alcoves, attics, basements, closets, utility rooms,

crawlspaces, and garages. The furnace is factory--shipped

for use with natural gas. A CSA (A.G.A. and C.G.A.) lis-

ted accessory gas conversion kit is required to convert fur-

nace for use with propane gas.

11. See Fig. 1 for required clearances to combustible construc-

tion.

12. Maintain a 1--in. (25 mm) clearance from combustible ma-

terials to supply air ductwork for a distance of 36 in. (914

mm) horizontally from the furnace. See NFPA 90B or loc-

al code for further requirements.

13. These furnaces SHALL NOT be installed directly on car-

peting, tile, or any other combustible material other than

wood flooring. In downflow installations, factory access-

ory floor base MUST be used when installed on combust-

ible materials and wood flooring. Special base is not re-

quired when this furnace is installed on manufacturer’s

Coil Assembly Part No. CNPV, CNRV, CAR or CAP or

when Coil Box Part No. KCAKC is used. See Fig. 1 for

clearance to combustible construction information.

310AAV

3

A

A

B

[736.9]

[736.9]

29

29

Ø7/8

Ø7/8

[22.2]

[22.2]

ACCESSORY

ACCESSORY

5 15/16

5 15/16

[150.7]

[150.7]

28.39

28.39

[721.2]

[721.2]

Ø7/8

Ø7/8

[22.2]

[22.2]

ACCESSORY

ACCESSORY

14 7/8

14 7/8

[337.3]

[337.3]

(BOTH SIDES)

(BOTH SIDES)

Ø7/8

Ø7/8

[22.2]

[22.2]

ACCESSORY

ACCESSORY

Ø7/8

Ø7/8

[22.2]

[22.2]

ACCESSORY

ACCESSORY

Ø1 3/4

Ø1 3/4

[44.5]

[44.5]

GAS ENTRY

GAS ENTRY

Ø1/2

Ø1/2

[12.7]

[12.7]

THERMOSTAT WIRE ENTRY

THERMOSTAT WIRE ENTRY

22 1/16

22 1/16

[560]

[560]

SIDE INLET

SIDE INLET

(BOTH SIDES)

(BOTH SIDES)

11 7/16

11 7/16

[290.7]

[290.7]

9 11/16

9 11/16

[245.4]

[245.4]

[197.8]

[197.8]

7 13/16

7 13/16

Ø7/8

Ø7/8

[22.2]

[22.2]

J.BOX PROVISION

J.BOX PROVISION

Ø7/8

Ø7/8

[22.2]

[22.2]

JUNCTION BOX

JUNCTION BOX

LOCATION

LOCATION

Ø1 3/4

Ø1 3/4

[44.5]

[44.5]

GAS ENTRY

GAS ENTRY

1 15/16

1 15/16

[49.2]

[49.2]

1

[25.4]

[25.4]

1 1/4

1 1/4

[31.8]

[31.8]

29 9/16

29 9/16

[750.7]

[750.7]

1 15/16

1 15/16

[49.2]

[49.2]

5 5/8

5 5/8

[143.3]

[143.3]

5 7/16

5 7/16

[138.5]

[138.5]

6 13/16

6 13/16

[172.3]

[172.3]

Ø1/2

Ø1/2

[12.7]

[12.7]

THERMOSTAT WIRE ENTRY

THERMOSTAT WIRE ENTRY

19

19

[481.7]

[481.7]

OUTLET

OUTLET

D

21.6

21.6

[549.5]

[549.5]

BOTTOM INLET

BOTTOM INLET

C

33 1/4

33 1/4

[843.9]

[843.9]

9 9/16

9 9/16

[243.3]

[243.3]

3/4

3/4

[19.1]

[19.1]

5 7/8

5 7/8

[148.5]

[148.5]

3 7/16

3 7/16

[86.8]

[86.8]

9 7/8

9 7/8

[250.7]

[250.7]

27 3/4

27 3/4

[704.7]

[704.7]

2 5/16

2 5/16

[59]

[59]

FRONT OF CASING

FRONT OF CASING

TOP OF CASING

TOP OF CASING

4 13/16

4 13/16

[122.2]

[122.2]

27 3/4

27 3/4

[704.7]

[704.7]

5 7/8

5 7/8

[148.5]

[148.5]

8 5/8

8 5/8

[219]

[219]

5 1/2

5 1/2

[140.3]

[140.3]

8 7/16

8 7/16

[213.5]

[213.5]

FRONT OF CASING

FRONT OF CASING

TOP OF CASING

TOP OF CASING

6.1

6.1

[155.7]

[155.7]

2 1/16

2 1/16

[51.6]

[51.6]

5.1

5.1

[130.5]

[130.5]

1.7

1.7

[43.5]

[43.5]

Ø7/8

Ø7/8

[22.2]

[22.2]

ACCESSORY (2)

ACCESSORY (2)

AIR FLOW

AIR FLOW

AIR FLOW

AIR FLOW

BOTTOM RETURN

BOTTOM RETURN

WIDTH

WIDTH

AIR FLOW

AIR FLOW

KNOCK OUTS FOR

KNOCK OUTS FOR

VENTING(5

VENTING(5

PLACES)

PLACES)

A10290

NOTES:

1. Two additional 7/8 ---in. (22 mm) diameter holes are located in the top plate.

2. Minimum return---air openings at furnace, based on metal duct. If flex duct is used, see flex duct manufacturer’s recommendations for equivalent diameters.

(a.) For 800 CFM---16 ---in. (406 mm) round or 14 1/2 x 12 ---in. (368 x 305 mm) rectangle.

(b.) For 1200 CFM---20---in. (508 mm) round or 14 1/2 x 19 1/2 ---in. (368 x 495 mm) rectangle.

(c.) For 1600 CFM---22---in. (559 mm) round or 14 1/2 x 22 1/16 ---in. (368 x 560mm) rectangle.

(d.) For airflow requirements above 1800 CFM, see Air Delivery table in Product Data literature for specific use of single side inlets. The use of both side

inlets, a combination of 1 side and the bottom, or the bottom only will ensure adequate return air openings for airflow requirements above 1800 CFM.

Fig. 1 --- Dimensional Drawing

Table 1—Dimensions -- In. (mm)

FURNACE SIZE

A

CABINET

WIDTH

B

OUTLET

WIDTH

C

TOP & BOTTOM

FLUE COLLAR

LOCATION

D

BOTTOM

INLET WIDTH

VENT

CONNECTION

SIZE

SHIP WT

LB (KG)

045---08/024045 14---3/16 (360) 12---9/16 (319) 9---5/16 (237) 12---11/16 (322) 4 (102) 104 (47)

045---12/036045 14---3/16 (360) 12---9/16 (319) 9---5/16 (237) 12---11/16 (322) 4 (102) 107 (49)

070---08/024070 14---3/16 (360) 12---9/16 (319) 9---5/16 (237) 12---11/16 (322) 4 (102) 111 (50)

070---12/036070 14---3/16 (360) 12---9/16 (319) 9---5/16 (237) 12---11/16 (322) 4 (102) 115 (52)

070---16/048070 17---1/2 (445) 15---7/8 (403) 11---9/16 (294) 16 (406) 4 (102) 126 (57)

090---14/042090 17---1/2 (445) 15---7/8 (403) 11---9/16 (294) 16 (406) 4 (102) 127 (58)

090---16/048090 21 (533) 19---3/8 (492) 13---5/16 (338) 19---1/2 (495) 4 (102) 140 (64)

090---20/060090 21 (533) 19---3/8 (492) 13---5/16 (338) 19---1/2 (495) 4 (102) 146 (66)

110---12/036110 17---1/2 (445) 15---7/8 (403) 11---9/16 (294) 16 (406) 4 (102) 135 (61)

110---16/048110 21 (533) 19---3/8 (492) 13---5/16 (338) 19---1/2 (495) 4 (102) 146 (66)

110---22/066110 21 (533) 19---3/8 (492) 13---5/16 (338) 19---1/2 (495) 4 (102) 152 (69)

135---16/048135 21 (533) 19---3/8 (492) 13---5/16 (338) 19---1/2 (495) 4 (102)* 149 (68)

135---22/066135 24---1/2 (622) 22---7/8 (581) 15---1/16 (383) 23 (584) 4 (102)* 163 (74)

155---20/060155 24---1/2 (622) 22---7/8 (581) 15---1/16 (383) 23 (584) 4 (102)* 170 (77)

*135 and 155 size furnaces require a 5 or 6 ---in. (127 or 152 mm) vent. Use a vent adapter between furnace and vent stack. See Installation Instructions for

complete installation requirements.

310AAV

4

A10269

Fig. 2 --- Clearances to Combustibles

60

80 / 27 C

/ 16 C

A06745

Fig. 3 --- Return Air Temperature

INTRODUCTION

Series 140/E 4--way multipoise Category I fan--assisted furnace is

CSA design--certified. A Category I fan--assisted furnace is an

appliance equipped with an integral mechanical means to either

draw or force products of combustion through the combustion

chamber and/or heat exchanger. The furnace is factory--shipped

for use with natural gas. This furnace is not approved for

installation in mobile homes, recreational vehicles, or outdoors.

This furnace is designed for minimum continuous return--air

temperature of 60_F(16_C) db or intermittent operation down to

55_F(13_C) db such as when used with a night setback

thermostat. Return--air temperature must not exceed 80_F(27_C)

db. Failure to follow these return--air temperature limits may

affect reliability of heat exchangers, motors, and controls. (See

Fig. 3.)

For accessory installation details, refer to the applicable

instruction literature.

NOTE: Remove all shipping brackets and materials before

operating the furnace.

CODES AND STANDARDS

Follow all national and local codes and standards in addition

to these instructions. The installation must comply with

regulations of the serving gas supplier, local building, heating,

plumbing, and other codes. In absence of local codes, the

installation must comply with the national codes listed below and

all authorities having jurisdiction. In the United States , follow all

codes and standards for the following:

Step 1 —Safety

310AAV

5

SNational Fuel Gas Code (NFGC) NFPA

54--2009/ANSI Z223.1--2009 and the Installation

Standards, Warm Air Heating and Air Conditioning

Systems ANSI/NFPA 90B

Step 2 —General Installation

SCurrent edition of the NFGC and the NFPA 90B. For

copies, contact the National Fire Protection Association

Inc., Batterymarch Park, Quincy, MA 02269;

(www.NFPA.org) or for only the NFGC, contact the

American Gas Association, 400 N. Capitol Street,

N.W., Washington, DC 20001 (www.AGA.org).

Step 3 —Combustion and Ventilation Air

SSection 9.3 of the NFGC, NFPA 54 / ANSI

Z223.1--2009 Air for Combustion and Ventilation

Step 4 —Duct Systems

SAir Conditioning Contractors Association (ACCA)

Manual D, Sheet Metal and Air Conditioning Contract-

ors National Association (SMACNA), or American

Society of Heating, Refrigeration, and Air Condition-

ing Engineers (ASHRAE) 2001 Fundamentals Hand-

book Chapter 34 or 2000 HVAC Systems and Equip-

ment Handbook Chapters 9 and 16.

Step 5 —Acoustical Lining and Fibrous Glass

Duct

SCurrent edition of SMACNA and NFPA 90B as tested

by UL Standard 181 for Class I Rigid Air Ducts

Step 6 —Gas Piping and Gas Pipe Pressure

Testing

SNFGC; NFPA 54 / ANSI Z223.1--2009 chapters 5, 6, 7

and 8 and National Plumbing Codes

Step 7 —Electrical Connections

SNational Electrical Code (NEC) ANSI/NFPA 70--2008

Step 8 —Venting

SNFGC NFPA 54 / ANSI Z223.1--2009; chapters 12

and 13

ELECTROSTATIC DISCHARGE (ESD)

PRECAUTIONS PROCEDURE

FURNACE RELIABILITY HAZARD

Failure to follow this caution may result in furnace

component damage.

Electrostatic discharge can affect electronic components.

Follow the Electrostatic Discharge Precautions Procedure

listed below during furnace installation and servicing to

protect the furnace electronic control. Precautions will

prevent electrostatic discharges from personnel and hand

tools which are held during the procedure. These

precautions will help to avoid exposing the control to

electrostatic discharge by putting the furnace, the control,

and the person at the same electrostatic potential.

CAUTION

!

1. Disconnect all power to the furnace. Multiple disconnects

may be required. DO NOT TOUCH THE CONTROL OR

ANY WIRE CONNECTED TO THE CONTROL PRIOR

TO DISCHARGING YOUR BODY’S

ELECTROSTATIC CHARGE TO GROUND.

2. Firmly touch the clean, unpainted, metal surface of the fur-

nace chassis which is close to the control. Tools held in a

person’s hand during grounding will be satisfactorily dis-

charged.

3. After touching the chassis, you may proceed to service the

control or connecting wires as long as you do nothing to

recharge your body with static electricity (for example;

DO NOT move or shuffle your feet, do not touch un-

grounded objects, etc.).

4. If you touch ungrounded objects (and recharge your body

with static electricity), firmly touch a clean, unpainted

metal surface of the furnace again before touching control

or wires.

5. Use this procedure for installed and uninstalled (ungroun-

ded) furnaces.

6. Before removing a new control from its container, dis-

charge your body’s electrostatic charge to ground to pro-

tect the control from damage. If the control is to be in-

stalled in a furnace, follow items 1 through 4 before

bringing the control or yourself in contact with the fur-

nace. Put all used and new controls into containers before

touching ungrounded objects.

7. An ESD service kit (available from commercial sources)

mayalsobeusedtopreventESDdamage.

LOCATION

CARBON MONOXIDE POISONING AND UNIT

DAMAGE HAZARD

Failure to follow this warning could result in personal

injury or death, and unit component damage.

Corrosive or contaminated air may cause failure of parts

containing flue gas, which could leak into the living space.

Air for combustion must not be contaminated by halogen

compounds, which include fluoride, chloride, bromide, and

iodide. These elements can corrode heat exchangers and

shorten furnace life. Air contaminants are found in aerosol

sprays, detergents, bleaches, cleaning solvents, salts, air

fresheners, and other household products. Do not install

furnace in a corrosive or contaminated atmosphere. Make

sure all combustion and circulating air requirements are met,

in addition to all local codes and ordinances.

!WARNING

GENERAL

This multipoise furnace is shipped in packaged configuration.

Some assembly and modifications are required when used in any

of the four applications shown in Fig. 4.

This furnace must:

Sbe installed so the electrical components are protected

from water.

Snot be installed directly on any combustible material

other than wood flooring for upflow applications.

Downflow installations require use of a factory--ap-

proved floor base or coil assembly when installed on

combustible materials or wood flooring. (Refer to

SAFETY CONSIDERATIONS).

310AAV

6

THE BLOWER IS LOCATED

TO THE RIGHT OF THE

BURNER SECTION, AND

AIR CONDITIONED AIR IS

DISCHARGED TO THE LEFT.

THE BLOWER IS

LOCATED BELOW THE

BURNER SECTION, AND

CONDITIONED AIR IS

DISCHARGED UPWARD.

THE BLOWER IS

LOCATED ABOVE THE

BURNER SECTION, AND

CONDITIONED AIR IS

DISCHARGED DOWNWARD

THE BLOWER IS

LOCATED TO THE LEFT

OF THE BURNER SECTION,

AND CONDITIONED AIR IS

DISCHARGED TO THE RIGHT.

A02097

Fig. 4 --- Multipoise Orientations

Sbe located as close to the chimney or vent and attached

to an air distribution system. Refer to Air Ducts section.

Sbe provided ample space for servicing and cleaning.

Always comply with minimum fire protection clear-

ances shown on the furnace clearance to combustible

label.

SThe following types of furnace installations may re-

quire OUTDOOR AIR for combustion due to chemical

exposures:

SCommercial buildings

SBuildings with indoor pools

SLaundry rooms

SHobby or craft rooms, and

SChemical storage areas

If air is exposed to the following substances, it should not be used

for combustion air, and outdoor air may be required for

combustion:

SPermanent wave solutions

SChlorinated waxes and cleaners

SChlorine based swimming pool chemicals

SWater softening chemicals

SDe--icing salts or chemicals

SCarbon tetrachloride

SHalogen type refrigerants

SCleaning solvents (such as perchloroethylene)

SPrinting inks, paint removers, varnishes, etc.

SHydrochloric acid

SCements and glues

SAntistatic fabric softeners for clothes dryers

SMasonry acid washing materials

All fuel--burning equipment must be supplied with air for fuel

combustion. Sufficient air must be provided to avoid negative

pressure in the equipment room or space. A positive seal must be

made between the furnace cabinet and the return--air duct to

prevent pulling air from the burner area and from draft safeguard

opening.

FIRE AND EXPLOSION HAZARD

Failure to follow this warning could result in personal

injury, death, and/or property damage.

When the furnace is installed in a residential garage, the

burners and ignition sources must be located at least 18

inches above the floor. The furnace must be located or

protected to avoid damage by vehicles. When the furnace is

installed in a public garage, airplane hangar, or other

building having a hazardous atmosphere, the furnace must

be installed in accordance with the NFGC. (See Fig. 5.)

!WARNING

310AAV

7

PERSONAL INJURY AND/OR PROPERTY

DAMAGE HAZARD

Failure to follow this caution may result in furnace

component damage.

This gas furnace may be used for heating buildings under

construction provided that:

--The furnace is permanently installed with all electrical

wiring, piping, venting and ducting installed according to

these installation instructions. A return air duct is provided,

sealed to the furnace casing, and terminated outside the

space containing the furnace. This prevents a negative

pressure condition as created by the circulating air blower,

causing a flame rollout and/or drawing combustion

products into the structure.

--The furnace is controlled by a thermostat. It may not be

hot wired to provide heat continuously to the structure

without thermostatic control.

--Clean outside air is provided for combustion. This is to

minimize the corrosive effects of adhesives, sealers and

other construction materials. It also prevents the

entrainment of drywall dust into combustion air, which can

cause fouling and plugging of furnace components.

--The temperature of the return air to the furnace is

maintained between 55_F(13_C) and 80_F(27_C), with

no evening setback or shutdown. The use of the furnace

while the structure is under construction is deemed to be

intermittent operation per our installation instructions.

--The air temperature rise is within the rated rise range on

the furnace rating plate, and the gas input rate has been set

to the nameplate value.

--The filters used to clean the circulating air during the

construction process must be either changed or thoroughly

cleaned prior to occupancy.

--The furnace, ductwork and filters are cleaned as necessary

to remove drywall dust and construction debris from all

HVAC system components after construction is completed.

--Verify proper furnace operating conditions including

ignition, gas input rate, air temperature rise, and venting

according to these installation instructions.

CAUTION

!

18-IN. (457.2 mm)

MINIMUM TO BURNERS

A93044

Fig. 5 --- Installation in a Garage

FIRE HAZARD

Failure to follow this warning could result in personal

injury, death and/or property damage.

Do not install the furnace on its back or hang furnace with

control compartment facing downward. Safety control

operation will be adversely affected. Never connect

return--air ducts to the back of the furnace. (See Fig. 6.)

!WARNING

A02054

Fig. 6 --- Prohibit Installation on Back

LOCATION RELATIVE TO COOLING EQUIPMENT

The cooling coil must be installed parallel with, or on the

downstream side of the unit to avoid condensation in the heat

exchangers. When installed parallel with the furnace, dampers or

other flow control must prevent chilled air from entering the

furnace. If the dampers are manually operated, they must be

equipped with means to prevent operation of either unit unless

the damper is in the full--heat or full--cool position.

AIR FOR COMBUSTION AND

VENTILATION

Provisions for adequate combustion, ventilation, and dilution air

must be provided in accordance with:

SSection 9.3 of the NFPA 54 / ANSI Z223.1--2009, Air

for Combustion and Ventilation, and applicable provi-

sions of the local building codes.

FURNACE CORROSION HAZARD

Failure to follow this caution may result in furnace damage.

Air for combustion must not be contaminated by halogen

compounds, which include fluoride, chloride, bromide, and

iodide. These elements can corrode heat exchangers and

shorten furnace life. Air contaminants are found in aerosol

sprays, detergents, bleaches, cleaning solvents, salts, air

fresheners, and other household products.

CAUTION

!

310AAV

8

CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in personal

injury or death.

The operation of exhaust fans, kitchen ventilation fans,

clothes dryers, attic exhaust fans or fireplaces could create a

NEGATIVE PRESSURE CONDITION at the furnace.

Make--up air MUST be provided for the ventilation devices,

in addition to that required by the furnace. Refer to Carbon

Monoxide Poisoning Hazard warning in venting section of

these instructions to determine if an adequate amount of

make--up air is available.

!WARNING

The requirements for combustion and ventilation air depend

upon whether or not the furnace is located in a space having a

volume of at least 50 cu/ft. per 1,000 Btuh input rating for all gas

appliances installed in the space.

SSpaces having less than 50 cu/ft. per 1,000 Btuh re-

quire the OUTDOOR COMBUSTION AIR

METHOD.

SSpaces having at least 50 cu/ft. per 1,000 Btuh may use

the INDOOR COMBUSTION AIR, STANDARD or

KNOWN AIR INFILTRATION METHOD.

Outdoor Combustion Air Method

1. Provide the space with sufficient air for proper combus-

tion, ventilation, and dilution of flue gases using perman-

ent horizontal or vertical duct(s) or opening(s) directly

communicating with the outdoors or spaces that freely

communicate with the outdoors.

2. Fig. 7 illustrates how to provide TWO OUTDOOR

OPENINGS, one inlet and one outlet combustion and

ventilation air opening, to the outdoors.

e. One opening MUST commence within 12 in. (300

mm) of the ceiling and the second opening MUST

commence within 12 in. (300 mm) of the floor.

f. Size openings and ducts per Fig. 7 and Table 2.

g. TWO HORIZONTAL DUCTS require 1 sq./in. of free

area per 2,000 Btuh (1,100 mm2/kW) of combined

input for all gas appliances in the space per Fig. 7 and

Table 2.

h. TWO OPENINGS OR VERTICAL DUCTS require 1

sq./in. of free area per 4,000 Btuh (550 mm2/kW) for

combined input of all gas appliances in the space per

Fig. 7 and Table 2.

3. ONE OUTDOOR OPENING requires:

a. 1 square inch of free area per 3,000 Btuh (734

mm2/kW) for combined input of all gas appliances in

the space per Table 2 and

b. Not less than the sum of the areas of all vent connect-

ors in the space.

The opening shall commence within 12 in. (300 mm) of the

ceiling. Appliances in the space shall have clearances of at least 1

in. (25 mm) from the sides and back and 6 in. (150 mm) from the

front. The opening shall directly communicate with the outdoors

or shall communicate through a vertical or horizontal duct to the

outdoors or spaces (crawl or attic) that freely communicate with

the outdoors.

Indoor Combustion Air NFPA & AGA

Standard and Known--Air--Infiltration Rate Methods

Indoor air is permitted for combustion, ventilation, and dilution,

if the Standard or Known--Air--Infiltration Method is used.

CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in death and/or

personal injury.

Many homes require air to be supplied from outdoors for

furnace combustion, ventilation, and dilution of flue gases.

The furnace combustion air supply must be provided in

accordance with this instruction manual.

!WARNING

Table 2—Minimum Free Area Required for Each Combustion Air Opening of Duct to Outdoors

FURNACE

INPUT

(BTUH)

TWO HORIZONTAL DUCTS SINGLE DUCT OR OPENING TWO OPENINGS OR VERTICAL

DUCTS

(1 SQ. IN./2,000 BTUH)

(1,100 SQ. MM/KW)

(1 SQ. IN./3,000 BTUH)

(734 SQ. MM/KW)

(1 SQ. IN./4,000 BTUH)

(550 SQ. MM/KW)

Free Area of Open-

ing and Duct

Sq. In. (Sq. mm)

Round Duct

Dia.

In. (mm)

Free Area of Open-

ing and Duct

Sq. In. (Sq. mm)

Round Duct

Dia.

In. (mm)

Free Area of Open-

ing and Duct

Sq. In. (Sq. mm)

Round Duct

Dia.

In. (mm)

44,000 22 (14194) 6 (152) 14.7 (9484) 5 (127) 11 (7096) 4 (102)

66,000 33 (21290) 7 (178) 22.0 (14193) 6 (152) 16.5 (10645) 5 (127)

88,000 44 (28387) 8 (203) 29.3 (18903) 7 (178) 22 (14193) 6 (152)

110,000 55 (35484) 9 (229) 36.7 (23677) 7 (178) 27.5 (17742) 6 (152)

132,000 66 (42580) 10 (254) 44 .0 (28387) 8 (203) 33 (21290) 7 (178)

154,000 77 (49677) 10 (254) 51.3 (33096) 9 (229) 38.5 (24839) 8 (203)

EXAMPLES: Determining Free Area

FURNACE WATER HEATER TOTAL INPUT

110,000 + 30,000 = (140,000 divided by 4,000) = 35.0 Sq. In. for each two Vertical Ducts or Openings

66,000 + 40,000 = (106,000 divided by 3,000) = 35.3 Sq. In. for a Single Duct or Opening

88,000 +30,000 =(118,000 divided by 2,000) =59.0 Sq. In. for each of two Horizontal Ducts

310AAV

9

Table 3—Minimum Space Volumes for 100% Combustion, Ventilation, and Dilution from Indoors

OTHER THAN FAN-ASSISTED TOTAL

(1,000’S BTUH GAS INPUT RATE)

FAN-ASSISTED TOTAL

(1,000’S BTUH GAS INPUT RATE)

ACH 30 40 50 44 66 88 110 132 154

SpaceVolumeFt

3(M3)

0.60 1,050

(29.7)

1,400

(39.6)

1,750

(49.5)

1,100

(31.1)

1,650

(46.7)

2,200

(62.2)

2,750

(77.8)

3,300

(93.4)

3,850

(109.0)

0.50 1,260

(35.6)

1,680

(47.5)

2,100

(59.4)

1,320

(37.3)

1,980

(56.0)

2,640

(74.7)

3,300

(93.4)

3,960

(112.1)

4,620

(130.8)

0.40 1,575

(44.5)

2,100

(59.4)

2,625

(74.3)

1,650

(46.7)

2,475

(70.0)

3,300

(93.4)

4,125

(116.8)

4,950

(140.1)

5,775

(163.5)

0.30 2,100

(59.4)

2,800

(79.2)

3,500

(99.1)

2,200

(62.2)

3,300

(93.4)

4,400

(124.5)

5,500

(155.7)

6,600

(186.8)

7,700

(218.0)

0.20 3,150

(89.1)

4,200

(118.9)

5,250

(148.6)

3,300

(93.4)

4,950

(140.1)

6,600

(186.8)

8,250

(233.6)

9,900

(280.3)

11,550

(327.0)

0.10 6,300

(178.3)

8,400

(237.8)

10,500

(297.3)

6,600

(186.8)

9,900

(280.3)

13,200

(373.7)

16,500

(467.2)

19,800

(560.6)

23,100

(654.1)

0.00 NP NP NP NP NP NP NP NP NP

NP = Not Permitted

1 SQ IN .

PER

4000

BTUH*

DUCTS

TO

O UTDOORS

1 SQ IN.

PER 4000

BTUH*

C IRCULA TING

AIR DUCTS

VENT

THR OUGH

R OOF

D

B

A

C

E

1 SQ IN.

PER 4000

BTUH*

DUCT

TO

OUTDOORS

CIRCULA TING AIR DUCT S

1 SQ IN.

PER 2000

BTUH*

1 SQ IN.

PER 2000

BTUH*

DUCT S

TO

OUTDOORS

12 ″ MAX

12 ″ MAX

12 ″ MAX

12 ″

MAX

12 ″

MAX

OUTDOORS

1 SQ IN .

PER

4000

BTUH*

F

G

CLEARANCE IN FRONT

OF COMB USTION AIR

OPENINGS SHALL BE

AT LEAST 3 IN .

(305mm)

(305mm)

(305mm)

(305mm)

(305mm)

(76mm)

*Minimum dimensions of 3--- in. (76 mm).

NOTE: Use any of the following combinations of openings:

A&BC&DD&EF&G

A03174

Fig. 7 --- Air for Combustion, Ventilation, and Dilution for

Outdoors

CIRCULATING AIR

DUCTS

6" MIN

(FRONT)Ü

CIRCULATING AIR DUCTS

VENT THROUGH ROOF

1 SQ IN.

PER 1000

BTUH* IN DOOR

OR WALL

12" MAX

1 SQ IN.

PER 1000

BTUH* IN DOOR

OR WALL

12" MA X

UNCONFINED

SPACE

INTERIOR

HEATED

SPACE

CLEARANCE IN FRONT OF COMBUSTION AIR

OPENINGS SHALL BE AT LEAST 3 IN.

(305mm)

(152mm)

(305mm)

* Minimum opening size is 100 sq in. (64516 sq. mm)with minimum dimensions

of3in.(76mm)

†Minimumof3in.(76mm)whentype-B1ventisused.

A03175

Fig. 8 --- Air for Combustion, Ventilation, and Dilution from

Indoors

310AAV

10

The Standard Method:

1. The space has no less volume than 50 cu/ft. per 1,000

Btuh of the maximum input ratings for all gas appliances

installed in the space and

2. The air infiltration rate is not known to be less than 0.40

air changes per hour (ACH).

The Known Air Infiltration Rate Method shall be used, if the

infiltration rate is known to be:

1. Less than 0.40 ACH and

2. Equal to or greater than 0.10 ACH

Infiltration rates greater than 0.60 ACH shall not be used. The

minimum required volume of the space varies with the number of

ACH and shall be determined per Table 3 or Equations 1 and 2.

Determine the minimum required volume for each appliance in

the space and add the volumes together to get the total minimum

required volume for the space.

Table 3 -- Minimum Space Volumes were determined by using

the following equations from the National Fuel Gas Code ANSI

Z223.1--2009/NFPA 54--2009, 9.3.2.2:

1. For other than fan--assisted appliances, such as a draft

hood--equipped water heater:

Volume

Other

=21ft

3

ACH

I

other

1000 Btu/hr

A04002

2. For fan--assisted appliances such as this furnace:

Volume

Fan

=15ft

3

ACH

I

fan

1000 Btu/hr

A04003

If:

Iother = combined input of all other than fan--assisted

appliances in Btuh/hr

Ifan = combined input of all fan--assisted appliances in Btuh/hr

ACH = air changes per hour (ACH shall not exceed 0.60.) The

following requirements apply to the Standard Method and to the

Known Air Infiltration Rate Method.

1. Adjoining rooms can be considered part of a space if:

a. There are no closeable doors between rooms.

b. Combining spaces on same floor level. Each opening

shall have free area of at least 1 in.2/1,000 Btuh (2,000

mm2/kW) of the total input rating of all gas appliances

in the space, but not less than 100 in.2(0.06 m2). One

opening shall commence within 12 in. (300 mm) of

the ceiling and the second opening shall commence

within 12 in. (300 mm) of the floor. The minimum

dimension of air openings shall be at least 3 in. (80

mm). (See Fig. 8.)

c. Combining space on different floor levels. The

volumes of spaces on different floor levels shall be

considered as communicating spaces if connected by

one or more permanent openings in doors or floors

having free area of at least 2 in.2/1,000 Btuh (4,400

mm2/kW) of total input rating of all gas appliances.

2. An attic or crawlspace may be considered a space that

freely communicates with the outdoors provided there are

adequate permanent ventilation openings directly to out-

doors having free area of at least 1--in.2/4,000 Btuh of total

input rating for all gas appliances in the space.

3. In spaces that use the Indoor Combustion Air Method, in-

filtration should be adequate to provide air for combus-

tion, permanent ventilation and dilution of flue gases.

However, in buildings with unusually tight construction,

additional air MUST be provided using the methods de-

scribedintheOutdoor Combustion Air Method section.

Unusually tight construction is defined as Construction with:

a. Walls and ceilings exposed to the outdoors have a con-

tinuous, sealed vapor barrier. Openings are gasketed or

sealed and

b. Doors and openable windows are weatherstripped and

c. Other openings are caulked or sealed. These include

joints around window and door frames, between sole

plates and floors, between wall--ceiling joints, between

wall panels, at penetrations for plumbing, electrical

and gas lines, etc.

Combination of Indoor and Outdoor Air

1. Indoor openings shall comply with the Indoor Combus-

tion Air Method below and,

2. Outdoor openings shall be located as required in the Out-

door Combustion Air Method mentioned previously and,

3. Outdoor openings shall be sized as follows:

a. Calculate the Ratio of all Indoor Space volume divided

by required volume for Indoor Combustion Air

Method below.

b. Outdoor opening size reduction Factor is 1 minus the

Ratio in a. above.

c. Minimum size of Outdoor openings shall be the size

required in Outdoor Combustion Air Method above

multiplied by reduction Factor in b. above. The min-

imum dimension of air openings shall be not less than

3in.(80mm).

INSTALLATION

UPFLOW INSTALLATION

Bottom Return Air Inlet

These furnaces are shipped with bottom closure panel installed in

bottom return--air opening. Remove and discard this panel when

bottom return air is used. To remove bottom closure panel,

perform the following:

1. Tilt or raise furnace and remove 2 screws holding bottom

filler panel. (See Fig. 9.)

Bottom

Closure Panel

Bottom Filler Panel

A10273

Fig. 9 --- Removing Bottom Closure Panel

2. Rotate bottom filler panel downward to release holding

tabs.

3. Remove bottom closure panel.

4. Reinstall bottom filler panel and screws.

Side Return Air Inlet

These furnaces are shipped with bottom closure panel installed in

bottom return--air opening. This panel MUST be in place when

only side return air is used.

310AAV

11

NOTE: Side return--air openings can be used in UPFLOW and

most HORIZONTAL configurations. Do not use side return--air

openings in DOWNFLOW configuration.

In upflow position with side return inlet(s), leveling legs may be

used. (See Fig. 10.) Install field--supplied, 5/16 x 1--1/2 in. (8 x

38 mm) (max) corrosion--resistant machine bolts, washers and

nuts.

NOTE: Bottom closure must be used when leveling legs are

used. It may be necessary to remove and reinstall bottom closure

panel to install leveling legs. To remove bottom closure panel, see

Item 1. in Bottom Return Air Inlet section.

1

3

/

4

″

1

3

/

4

″

1

3/

4

″

1

3/

4

″

5/

16

″

5

/

16

″

5/

16

″

5/

16

″

(44mm)

(8mm)

(44mm)

(8mm)

(8mm)

(8mm)

(44mm)

(44mm)

A89014

Fig. 10 --- Leveling Legs

Leveling Legs (If Desired)

To install leveling legs:

1. Position furnace on its back. Locate and drill a hole in

each bottom corner of furnace. (See Fig. 10.)

2. For each leg, install nut on bolt and then install bolt and

nut in hole. (Install flat washer if desired.)

3. Install another nut on other side of furnace base. (Install

flat washer if desired.)

4. Adjust outside nut to provide desired height, and tighten

inside nut to secure arrangement.

5. Reinstall bottom closure panel if removed.

DOWNFLOW INSTALLATION

NOTE: For downflow applications, this furnace is approved for

use on combustible flooring when any one of the following 3

accessories are used:

SSpecial Base, KGASB

SCased Coil Assembly Part No. CNPV, CNRV, CAR,

or CAP

SCoil Box Part No. KCAKC

1. Determine application being installed from Table 4.

2. Construct hole in floor per Table 4 and Fig. 11.

3. Construct plenum to dimensions specified in Table 4 and

Fig. 11.

4. If downflow subbase, KGASB is used, install as shown in

Fig. 12. If Coil Assembly Part No. CNPV, CNRV, CAR,

or CAP or Coil Box Part No. KCAKC is used, install as

shown in Fig. 13.

PLENUM

OPENING

C

A

BD

FLOOR

OPENING

A96283

Fig. 11 --- Floor and Plenum Opening Dimensions

NOTE: It is recommended that the perforated supply--air duct

flanges be completely folded over or removed from furnace when

installing the furnace on a factory--supplied cased coil or coil box.

To remove the supply--air duct flange, use wide duct pliers or

hand seamers to bend flange back and forth until it breaks off. Be

careful of sharp edges. (See Fig. 14.)

DOWNFLOW

SUBBASE

SHEET METAL

PLENUM

FLOOR

OPENING

FURNACE

(OR COIL CASING

WHEN USED)

COMBUSTIBLE

FLOORING

A96285

Fig. 12 --- Furnace, Plenum, and Subbase Installed on a

Combustible Floor

310AAV

12

APPROVED

COIL ASSEMBLY

OR

COIL BOX

FURNACE

SHEET METAL

PLENUM

FLOOR

OPENING

COMBUSTIBLE

FLOORING

A08556

Fig. 13 --- Furnace, Plenum, and Coil Assembly or Coil Box

Installed on a Combustible Floor

Bottom Return Air Inlet

These furnaces are shipped with bottom closure panel installed in

bottom return--air opening. Remove and discard this panel when

bottom return air is used. To remove bottom closure panel,

perform the following:

1. Tilt or raise furnace and remove 2 screws holding bottom

filler panel. (See Fig. 9.)

2. Rotate bottom filler panel downward to release holding

tabs.

3. Remove bottom closure panel.

4. Reinstall bottom filler panel and screws.

HORIZONTAL INSTALLATION

FIRE, EXPLOSION, AND CARBON MONOXIDE

POISONING HAZARD

Failure to follow this warning could result in personal

injury, death, or property damage.

Do not install the furnace on its back or hang furnace with

control compartment facing downward. Safety control

operation will be adversely affected. Never connect

return--air ducts to the back of the furnace.

!WARNING

The furnace can be installed horizontally in an attic or crawl

space on either the left--hand (LH) or right--hand (RH) side. The

furnace can be hung from floor joists, rafters or trusses or

installed on a non--combustible platform, blocks, bricks or pad.

Suspended Furnace Support

The furnace may be supported under each end with threaded rod,

angle iron or metal plumber’s strap as shown. (See Fig. 15 and

16.) Secure angle iron to bottom of furnace as shown.

Heavy--gauge sheet metal straps (plumber’s straps) may be used

to suspend the furnace from each bottom corner. To prevent

screws from pulling out, use 2 #8 x 3/4--in. (19 mm) screws into

the side and 2 #8 x 3/4--in. (19 mm) screws in the bottom of the

furnace casing for each strap. (See Fig. 15 and 16.)

If the screws are attached to ONLY the furnace sides and not the

bottom, the straps must be vertical against the furnace sides and

not pull away from the furnace sides, so that the strap attachment

screws are not in tension (are loaded in shear) for reliable support.

Platform Furnace Support

Construct working platform at location where all required furnace

clearances are met. (See Fig. 2 and 17.) For furnaces with 1--in.

(25 mm) clearance requirement on side, set furnace on non--

combustible blocks, bricks or angle iron. For crawl space

installations, if the furnace is not suspended from the floor joists,

the ground underneath furnace must be level and the furnace set

on blocks or bricks.

Roll--Out Protection

Provide a minimum 17--3/4 in. x 22 in. (451 x 559 mm) piece of

sheet metal for flame roll--out protection in front of burner area

for furnaces closer than 12 inches (305 mm) above the

combustible deck or suspended furnaces closer than 12 inches

(305 mm) to joists. The sheet metal MUST extend underneath the

furnace casing by 1 in. (25 mm) with the door removed.

The bottom closure panel on furnaces of widths 17--1/2 in. (445

mm) and larger may be used for flame roll--out protection when

bottom of furnace is used for return air connection. See Fig. 17

for proper orientation of roll--out shield.

Bottom Return Air Inlet

These furnaces are shipped with bottom closure panel installed in

bottom return--air opening. Remove and discard this panel when

bottom return air is used. To remove bottom closure panel,

perform the following:

1. Tilt or raise furnace and remove 2 screws holding bottom

filler panel. (See Fig. 9.)

2. Rotate bottom filler panel downward to release holding

tabs.

3. Remove bottom closure panel.

4. Reinstall bottom filler panel and screws.

Side Return Air Inlet

These furnaces are shipped with bottom closure panel installed in

bottom return--air opening. This panel MUST be in place when

side return air inlet(s) is used without a bottom return air inlet.

Not all horizontal furnaces are approved for side return air

connections. (See Fig. 20.)

FILTER ARRANGEMENT

CARBON MONOXIDE AND POISONING HAZARD

Failure to follow this warning could result in personal

injury, death and/or property damage.

Never operate a furnace without a filter or with filter access

door removed.

!WARNING

There are no provisions for an internal filter rack in these

furnaces.

Refer to the instructions supplied with accessory Media Cabinet

for assembly and installation options.

This furnace requires a field--supplied external filter rack or a

suitable field--supplied substitute, such as the media cabinet. See

Table 17 for accessory list.

Refer to the instructions supplied with external filter rack for

assembly and installation options.

310AAV

13

Table 4—Opening Dimensions -- In. (mm)

FURNACE

CASING

WIDTH

APPLICATION PLENUM OPENING FLOOR OPENING

A B C D

14–3/16

(360)

Upflow Applications on Combustible or Noncombustible Floor-

ing (KGASB subbase not required)

12---11/16

(322)

21---5/8

(549)

13---5/16

(338)

22---1/4

(565)

Downflow Applications on Noncombustible Flooring (KGASB

subbase not required)

12---9/16

(319)

19

(483)

13---3/16

(335)

19---5/8

(498)

Downflow applications on combustible flooring (KGASB sub-

base required)

11---13/16

(284)

19

(483)

13---7/16

(341)

20---5/8

(600)

Downflow Applications on Combustible Flooring with CNPV,

CNRV, CAR, or CAP Coil Assembly or KCAKC coil box

(KGASB subbase not required)

12---5/16

(319)

19

(483)

13---5/16

(338)

20

(508)

17–1/2

(445)

Upflow Applications on Combustible or Noncombustible Floor-

ing (KGASB subbase not required)

16

(406)

21---5/8

(549)

16---5/8

(422)

22---1/4

(565)

Downflow Applications on Noncombustible Flooring (KGASB

subbase not required)

15---7/8

(403)

19

(483)

16---1/2

(419)

19---5/8

(498)

Downflow applications on combustible flooring (KGASB sub-

base required)

15---1/8

(384)

19

(483)

16---3/4

(425)

20---5/8

(600)

Downflow Applications on Combustible Flooring with CNPV,

CNRV, CAR, or CAP Coil Assembly or KCAKC coil box

(KGASB subbase not required)

15---1/2

(394)

19

(483)

16---1/2

(419)

20

(508)

21

(533)

Upflow Applications on Combustible or Noncombustible Floor-

ing (KGASB subbase not required)

19---1/2

(495)

21---5/8

(549)

20---1/8

(511)

22---1/4

(565)

Downflow Applications on Noncombustible Flooring (KGASB

subbase not required)

19---3/8

(492)

19

(483)

20

(508)

19---5/8

(498)

Downflow applications on combustible flooring (KGASB sub-

base required)

18---5/8

(473)

19

(483)

20---1/4

(514)

20---5/8

(600)

Downflow Applications on Combustible Flooring with CNPV,

CNRV, CAR, or CAP Coil Assembly or KCAKC coil box

(KGASB subbase not required)

19

(483)

19

(483)

20

(508)

20

(508)

24---1/2

(622)

Upflow Applications on Combustible or Noncombustible Floor-

ing (KGASB subbase not required)

23

(584)

21---1/8

(537)

23---5/8

(600)

22---1/4

(565)

Downflow Applications on Noncombustible Flooring (KGASB

subbase not required)

22---7/8

(581)

19

(483)

23---1/2

(597)

19---5/8

(498)

Downflow applications on Combustible flooring (KGASB sub-

base required)

22---1/8

(562)

19

(483)

23---3/4

(603)

20---5/8

(600)

Downflow Applications on Combustible Flooring with CNPV,

CNRV, CAR, or CAP Coil Assembly or KCAKC coil box

(KGASB subbase not required)

22---1/2

(572)

19

(483)

23---1/2

(597)

20

(508)

AIR DUCTS

General Requirements

The duct system should be designed and sized according to

accepted national standards such as those published by: Air

Conditioning Contractors Association (ACCA), Sheet Metal and

Air Conditioning Contractors National Association (SMACNA)

or American Society of Heating, Refrigerating and Air

Conditioning Engineers (ASHRAE) or consult The Air Systems

Design Guidelines reference tables available from your local

distributor. The duct system should be sized to handle the

required system design CFM at the design external static pressure.

The furnace airflow rates are provided in Table 5 -- AIR

DELIVERY--CFM (With Filter).

When a furnace is installed so that the supply ducts carry air

circulated by the furnace to areas outside the space containing the

furnace, the return air shall also be handled by duct(s) sealed to

the furnace casing and terminating outside the space containing

the furnace.

Secure ductwork with proper fasteners for type of ductwork used.

Seal supply-- and return--duct connections to furnace with code

approved tape or duct sealer.

NOTE: Flexible connections should be used between ductwork

and furnace to prevent transmission of vibration. Ductwork

passing through unconditioned space should be insulated and

sealed to enhance system performance. When air conditioning is

used, a vapor barrier is recommended.

Maintain a 1--in. (25 mm) clearance from combustible materials

to supply air ductwork for a distance of 36 in. (914 mm)

horizontally from the furnace. See NFPA 90B or local code for

further requirements.

Ductwork Acoustical Treatment

NOTE: Metal duct systems that do not have a 90 degree elbow

and 10 ft. (3 M) of main duct to the first branch take--off may

require internal acoustical lining. As an alternative, fibrous

ductwork may be used if constructed and installed in accordance

with the latest edition of SMACNA construction standard on

fibrous glass ducts. Both acoustical lining and fibrous ductwork

shall comply with NFPA 90B as tested by UL Standard 181 for

Class 1 Rigid air ducts.

Supply Air Connections

For a furnace not equipped with a cooling coil, the outlet duct

shall be provided with a removable access panel. This opening

shall be accessible when the furnace is installed and shall be of

such a size that the heat exchanger can be viewed for possible

openings using light assistance or a probe can be inserted for

sampling the air stream. The cover attachment shall prevent leaks.

310AAV

14

Table 5—Air Delivery -- CFM (with Filter)*

FURNACE

SIZE

RETURN---AIR

INLET SPEED EXTERNAL STATIC PRESSURE (In. W.C.)

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

045---08/

024045

Bottom or

Side(s)

High

M e d --- H i g h

M e d --- L o w

1035

865

760

995

830

720

945

790

680

895

745

635

835

690

580

770

625

520

675

545

445

565

440

345

390

250

220

195

195

195

045---12/

036045

Bottom or

Side(s)

High

M e d --- H i g h

M e d --- L o w

1440

1360

1250

1375

1300

1210

1305

1240

1160

1240

1175

1100

1160

1115

1040

1070

1040

965

975

950

885

870

850

790

730

725

670

560

575

520

070---08/

024070

Bottom or

Side(s)

High

M e d --- H i g h

M e d --- L o w

1030

835

725

1005

815

700

965

790

675

925

755

635

870

710

595

810

660

545

740

590

460

645

480

350

465

325

250

280

205

--- ---

070---12/

036070

Bottom or

Side(s)

High

M e d --- H i g h

M e d --- L o w

1425

1320

1200

1375

1280

1175

1320

1240

1145

1265

1205

1105

1200

1140

1050

1125

1075

990

1035

995

920

940

905

840

830

790

725

655

620

555

070---16/

048070

Bottom or

Side(s)

High

M e d --- H i g h

M e d --- L o w

1755

1550

1355

1700

1520

1340

1635

1475

1310

1570

1430

1280

1505

1375

1240

1435

1310

1190

1350

1240

1125

1260

1155

1060

1160

1070

975

1055

970

890

090---14/

042090

Bottom or

Side(s)

High

M e d --- H i g h

M e d --- L o w

1605

1470

1310

1570

1445

1295

1535

1410

1265

1465

1380

1230

1385

1300

1195

1285

1220

1120

1175

1115

1025

1055

990

915

895

830

710

645

600

565

090---16/

048090

Bottom or

Side(s)

High

M e d --- H i g h

M e d --- L o w

1940

1740

1505

1880

1700

1505

1805

1650

1480

1720

1590

1440

1635

1525

1375

1540

1440

1300

1425

1335

1190

1290

1195

1045

1090

1010

890

830

820

740

090---20/

060090

Bottom Only

High

M e d --- H i g h

M e d --- L o w

2405

2170

1920

2310

2110

1875

2220

2040

1835

2130

1970

1780

2025

1895

1715

1920

1785

1630

1790

1675

1535

1660

1565

1420

1530

1420

1275

1350

1260

1135

Both Sides or 1

Side & Bottom

High

M e d --- H i g h

M e d --- L o w

2530

2230

1895

2450

2170

1890

2365

2110

1845

2270

2050

1815

2165

1985

1755

2065

1890

1685

1940

1780

1600

1805

1660

1480

1670

1525

1350

1505

1360

1180

1Side Only

High

M e d --- H i g h

M e d --- L o w

2475

2105

1850

2395

2145

1860

2300

2070

1810

2200

2010

1770

2090

1940

1715

1985

1845

1650

1865

1735

1555

1730

1620

1445

1585

1475

1310

1425

1325

1150

110---12/

036110

Bottom or

Side(s)

High

M e d --- H i g h

M e d --- L o w

1600

1475

1315

1550

1435

1295

1490

1395

1265

1425

1335

1220

1355

1285

1155

1260

1185

1080

1135

1070

985

990

890

810

785

725

675

530

450

440

110---16/

048110

Bottom or

Side(s)

High

M e d --- H i g h

M e d --- L o w

1980

1745

1530

1915

1710

1515

1835

1650

1470

1750

1560

1400

1655

1450

1310

1495

1340

1215

1365

1205

1095

1185

1090

990

965

865

830

700

605

670

110---22/

066110

Bottom Only

High

M e d --- H i g h

M e d --- L o w

2485

2135

1855

2415

2100

1840

2340

2060

1815

2255

2000

1775

2160

1930

1725

2080

1860

1675

1950

1765

1600

1840

1670

1510

1720

1555

1405

1565

1425

1290

Bottom Sides

or 1 Side & Bot-

tom

High

M e d --- H i g h

M e d --- L o w

--- ---

2140

1855

--- ---

2100

1840

2355

2050

1815

2285

1990

1775

2190

1935

1725

2090

1865

1675

1965

1760

1600

1850

1670

1510

1705

1545

1405

1535

1410

1290

1Side Only

High

M e d --- H i g h

M e d --- L o w

2495

2030

--- ---

2440

2025

1735

2370

2000

1725

2290

1950

1695

2205

1905

1650

2120

1850

1595

2015

1750

1535

1910

1660

1455

1775

1555

1335

1625

1425

1230

* A filter is required for each return ---air inlet. Airflow performance included 3/4 ---in. (19 mm) washable filter media such as contained in factory --- a u th o r iz e d a c -

cessory filter rack. To determine airflow performance without this filter, assume an additional 0.1 In. W.C. available external static pressure.

--- --- Indicates unstable operating conditions.

310AAV

15

Table 5⎯Air Delivery -- CFM (with Filter)* (Continued)

FURNACE

SIZE

RETURN---AIR

INLET SPEED EXTERNAL STATIC PRESSURE (In. W.C.)

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

135---16/

048135

Bottom or

Side(s)

High

M e d --- H i g h

M e d --- L o w

2065

1790

1480

2000

1755

1480

1930

1705

1480

1835

1640

1450

1710

1550

1380

1590

1465

1295

1420

1295

1160

1235

1145

1005

1025

945

855

835

775

670

135---22/

066135

Bottom Only

High

M e d --- H i g h

M e d --- L o w

2445

2130

1860

2365

2080

1830

2280

2025

1800

2190

1960

1755

2085

1880

1705

1980

1795

1630

1850

1690

1530

1705

1550

1415

1520

1405

1280

1355

1255

1140

Bottom, Sides

or 1 Side & Bot-

tom

High

M e d --- H i g h

M e d --- L o w

--- ---

2120

1860

--- ---

2075

1830

2355

1995

1800

2280

1970

1755

2160

1905

1725

2065

1835

1630

1930

1735

1530

1805

1645

1415

1655

1515

1280

1465

1325

1140

1SideOnly

High

M e d --- H i g h

M e d --- L o w

--- ---

2070

1860

--- ---

2015

1830

2215

1970

1800

2130

1935

1755

2030

1855

1725

1920

1765

1630

1795

1655

1530

1675

1550

1415

1540

1445

1280

1385

1265

1140

155---20/

060155

Bottom Only

High

M e d --- H i g h

M e d --- L o w

2465

2115

1800

2430

2095

1790

2375

2055

1770

2305

2005

1735

2215

1940

1695

2110

1845

1640

2000

1820

1570

1865

1675

1465

1715

1525

1345

1530

1390

1225

Both Sides Or 1

Side & Bottom

High

M e d --- H i g h

M e d --- L o w

--- ---

2155

1800

--- ---

2125

1790

2375

2075

1770

2285

2015

1735

2185

1935

1695

2105

1830

1640

1995

1780

1570

1870

1635

1465

1720

1485

1345

1555

1365

1225

1Side Only

High

M e d --- H i g h

M e d --- L o w

--- ---

2140

1800

--- ---

2085

1790

2260

2020

1770

2180

1950

1735

2070

1850

1695

1975

1745

1640

1865

1695

1570

1740

1545

1465

1595

1415

1345

1440

1290

1225

* A filter is required for each return ---air inlet. Airflow performance included 3/4 ---in. (19 mm) washable filter media such as contained in factory --- a u th o r iz e d a c -

cessory filter rack. To determine airflow performance without this filter, assume an additional 0.1 In. W.C. available external static pressure.

--- --- Indicates unstable operating conditions.

UPFLOW DOWNFLOW HORIZONTAL

YES

NO NO

YES

YES

YES

NO

120°

MIN YES 120°

MIN YES

120°

MIN

90°90°

A02020

Fig. 14 --- Duct Flanges

310AAV

16

1

/ 4

" (6mm) THREADED ROD

4 REQ.

SECURE ANGLE

IRON TO BOTTOM

OF FURNACE WITH

3 #8 x

3/4" (19mm) SCREWS

TYPICAL FOR 2 SUPPORTS

1” (25mm) SQUARE, 1-1/4”x1-1/4”x1/8” (32x32x3mm)

ANGLE IRON OR UNI-STRUT MAY BE USED

(2) HEX NUTS, (2) WASHERS & (2) LOCK WASHERS

REQ. PER ROD

8" (203mm) MIN

FOR DOOR REMOVAL

OUTER DOOR

A S SEMBLY

A10130

Fig. 15 --- Horizontal Unit Suspension

METHOD 2

USE (4) #8 x 3/4 (19 mm) SHEET

METAL SCREWS FOR EACH

STRAP. THE STRAPS

SHOULD BE VERTICAL

AGAINST THE FURNACE

SIDES AND NOT PULL AWAY

FROM THE FURNACE

SIDES.

METHOD 1

FOLD ALL STRAPS UNDER

FURNACE AND SECURE WTH

(4) #8 x 3/4 (19 mm) SHEET METAL SCREWS

(2 SCREWS IN SIDE AND 2 SCREWS

IN BOTTOM).

A10131

Fig. 16 --- Horizontal Suspension with Straps

310AAV

17

30-IN . (762mm)

MIN WORK AREA

6 ″ M IN

*

TYPE-B

VENT

17

3

/

4

″

22

″

SHEET

MET AL

SEDIMENT

TRAP

EQUIPMENT MANU AL

SHUT -OFF GAS VA LV E

LINE CONT A CT ONL Y PERMISSIBLE BETWEEN

LINES FORMED BY INTERSECTIONS OF

THE T OP AND TW O SIDES OF THE FURNA CE

JA CKET AND BUILDING JOISTS ,

STUDS , OR FRAMING.

GAS

ENTR Y

17

3

/

4

″

(451mm)

OVERALL

4

3

/

4

″

(121mm)

UNDER DOOR

1 ″

(25mm)

UNDER FURNACE

EXTEND OUT 12 ″

(305mm)

FR OM FA CE OF DOOR

* WHEN USED W ITH

SINGLE W ALL VEN T

CONNECTIONS

UNION

(152mm)

(451mm)

(559mm)

A10164

Fig. 17 --- Typical Attic Installation

A02075

Fig. 18 --- Upflow Return Air Configurations and Restrictions

310AAV

18

A02163

Fig. 19 --- Downflow Return Air Configurations and Restrictions

A02162

Fig. 20 --- Horizontal Return Air Configurations and Restrictions

Upflow and Horizontal Furnaces

Connect supply--air duct to flanges on furnace supply--air outlet.

Bend flange upward to 90_with wide duct pliers. (See Fig. 14.)

The supply--air duct must be connected to ONLY the furnace

supply--outlet--air duct flanges or air conditioning coil casing

(when used). DO NOT cut main furnace casing side to attach

supply air duct, humidifier, or other accessories. All accessories

MUST be connected to duct external to furnace main casing.

NOTE: For horizontal applications, the top--most flange may be

bent past 90_to allow the evaporator coil to hang on the flange

temporarily while the remaining attachment and sealing of the

coil are performed.

Downflow Furnaces

Connect supply--air duct to supply--air outlet on furnace. Bend

flange inward past 90_with wide duct pliers. (See Fig. 14.) The

supply--air duct must be connected to ONLY the furnace

supplyoutlet or air conditioning coil casing (when used). When

installed on combustible material, supply--air duct must be

connected to ONLY the factory--approved accessory subbase or a

factory--approved air conditioning coil casing. DO NOT cut main

furnace casing to attach supply side air duct, humidifier, or other

310AAV

19

accessories. All accessories MUST be connected to duct external

to furnace casing.

FIRE HAZARD

A failure to follow this warning could result in personal

injury, or death and/or property damage.

Never connect return--air ducts to the back of the

furnace. Follow instructions below.

!WARNING

Return Air Connections

Downflow Furnaces

The return--air duct must be connected to return--air opening

(bottom inlet) as shown in Fig. 19. DO NOT cut into casing sides

(left or right). Side opening is permitted for only upflow and most

horizontal furnaces. (See Fig. 19.) Bypass humidifier connections

should be made at ductwork or coil casing sides exterior to

furnace.

Upflow and Horizontal Furnaces

The return--air duct must be connected to bottom, sides (left or

right), or a combination of bottom and side(s) of main furnace

casing as shown in Fig. 18 and 20. Bypass humidifier may be

attached into unused return air side of the furnace casing. (See

Fig. 18 and 20.)

Not all horizontal furnaces are approved for side return air

connections. (See Fig. 20.)

GAS PIPING

FIRE OR EXPLOSION HAZARD

Failure to follow this warning could result in personal

injury, death, and/or property damage.

Never purge a gas line into a combustion chamber. Never

test for gas leaks with an open flame. Use a commercially

available soap solution made specifically for the detection

of leaks to check all connections.

!WARNING

FIRE OR EXPLOSION HAZARD

Failure to follow this warning could result in personal

injury, death, and/or property damage.

Use proper length of pipe to avoid stress on gas control

manifold and a gas leak.

!WARNING

Gas piping must be installed in accordance with national and

local codes. Refer to current edition of NFGC.

Installations must be made in accordance with all authorities

having jurisdiction. If possible, the gas supply line should be a

separate line running directly from meter to furnace.

NOTE: In the state of Massachusetts:

1. Gas supply connections MUST be performed by a li-

censed plumber or gas fitter.

2. When flexible connectors are used, the maximum length

shall not exceed 36 inches (915 mm).

3. When lever handle type manual equipment shutoff valves

are used, they shall be T--handle valves.

4. The use of copper tubing for gas piping is NOT approved

by the state of Massachusetts.

Refer to Table 6 for recommended gas pipe sizing. Risers must be

used to connect to furnace and to meter. Support all gas piping

with appropriate straps, hangers, etc. Use a minimum of 1 hanger

every 6 ft. (1.8 M) Joint compound (pipe dope) should be applied

sparingly and only to male threads of joints. Pipe dope must be

resistant to the action of propane gas.

Table 6—Maximum Capacity of Pipe

NOMINAL

IRON PIPE

SIZE

IN. (MM)

INTERNAL

DIA.

IN. (MM)

LENGTH OF PIPE --- FT (M)

10

(3.0)

20

(6.0)

30

(9.1)

40

(12.1)

50

(15.2)

1/2 (12.7) 0.622

(158) 175 120 97 82 73

3/4 (19.0) 0.824

(20.9) 360 250 200 170 151

1( 25.4) 1.049

(26.6) 680 465 375 320 285

1-1/4

(31.8)

1.380

(35.0) 1400 950 770 660 580

1-1/2

(38.1)

1.610

(40.9) 2100 1460 1180 990 900

* Cubic ft. of natural gas per hr for gas pressures of 0.5 psig (14---In. W.C.)

or less and a pressure drop of 0.5 ---In. W.C. (based on a 0.60 specific

gravity gas). Ref: Table 6 and ANSI Z223---2009/NFPA 54 ---2009.

FIRE OR EXPLOSION HAZARD

Failure to follow this warning could result in personal

injury, death, and/or property damage.

If local codes allow the use of a flexible gas appliance

connector, always use a new listed connector. Do not use a

connector which has previously served another gas

appliance. Black iron pipe shall be installed at the furnace

gas control valve and extend a minimum of 2 in. (51 mm)

outside the furnace.

!WARNING

FURNACE OVERHEAT HAZARD

Failure to follow this caution may result in unit component

damage.

Connect gas pipe to gas valve using a backup wrench to

avoid damaging gas controls and burner misalignment.

CAUTION

!

An accessible manual equipment shutoff valve MUST be

installed external to furnace casing and within 6 ft. (1.8 M) of

furnace. A 1/8--in. (3 mm) NPT plugged tapping, accessible for

test gauge connection, MUST be installed immediately upstream

of gas supply connection to furnace and downstream of manual

equipment shutoff valve.

NOTE: The furnace gas valve inlet pressure tap connection is

suitable to use as test gauge connection providing test pressure

DOES NOT exceed maximum 0.5 psig (14--In. W.C.) stated on

gas control valve. (See Fig. 42.)

Some installations require gas entry on right side of furnace (as

viewed in upflow.) (See Fig. 21.)

Install a sediment trap in riser leading to furnace as shown in Fig.

22. Connect a capped nipple into lower end of tee. Capped nipple

should extend below level of furnace gas controls. Place a ground

joint union between furnace gas control valve and exterior

manual equipment gas shutoff valve. A 1/8--in. (3 mm) NPT

plugged tapping, accessible for test gauge connection, MUST be

installed immediately upstream of gas supply connection to

furnace and downstream of manual equipment shutoff valve.

310AAV

20

2” (51mm)

Street Elbow

A08551

Fig. 21 --- Burner and Manifold

UNION

SEDIMENT

TRAP

MANUAL

SHUTOFF

VALVE

(REQUIRED)

GAS

SUPPLY

A02035

Fig. 22 --- Typical Gas Pipe Arrangement

Piping should be pressure and leak tested in accordance with

NFGC, local, and national plumbing and gas codes before the

furnace has been connected. After all connections have been

made, purge lines and check for leakage at furnace prior to

operating furnace.

If pressure exceeds 0.5 psig (14--In. W.C.), gas supply pipe must

be disconnected from furnace and capped before and during

supply pipe pressure test. If test pressure is equal to or less than

0.5 psig (14--In. W.C.), turn off electric shutoff switch located on

furnace gas control valve and accessible manual equipment

shutoff valve before and during supply pipe pressure test. After

all connections have been made, purge lines and check for

leakage at furnace prior to operating furnace.

The gas supply pressure shall be within the maximum and

minimum inlet supply pressures marked on the rating plate with

the furnace burners ON and OFF.

Factory

Factory

Installed

Installed

Alternate

Alternate

Location

Location

A10291

Fig. 23 --- Relocating J--Box

A10141

Fig. 24 --- Field--Supplied Electrical Box on Furnace Casing

ELECTRICAL CONNECTIONS

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal

injury or death.

Blower access panel door switch opens 115--v power to

control. No component operation can occur. Do not bypass

or close switch with panel removed.

!WARNING

See Fig. 26 for field wiring diagram showing typical field 115--v

wiring. Check all factory and field electrical connections for

tightness.

310AAV

21

ELECTRICAL SHOCK AND FIRE HAZARD

Failure to follow this warning could result in personal

injury, death, or property damage.

The cabinet MUST have an uninterrupted or unbroken

ground according to NEC ANSI/NFPA 70--2008 or local

codes to minimize personal injury if an electrical fault

should occur. This may consist of electrical wire, conduit

approved for electrical ground or a listed, grounded power

cord (where permitted by local code) when installed in

accordance with existing electrical codes. Refer to the

power cord manufacturer’s ratings for proper wire gauge.

Do not use gas piping as an electrical ground.

!WARNING

FURNACE MAY NOT OPERATE

Failure to follow this caution may result in intermittent

furnace operation.

Furnace control must be grounded for proper operation or

else control will lock out. Control must remain grounded

through green/yellow wire routed to gas valve and manifold

bracket screw.

CAUTION

!

115--V WIRING

Verify that the voltage, frequency, and phase correspond to that

specified on unit rating plate. Also, check to be sure that service

provided by utility is sufficient to handle load imposed by this

equipment. Refer to rating plate or Table 7 for equipment

electrical specifications.

Make all electrical connections in accordance with National

Electrical Code (NEC) ANSI/NFPA 70--2008 and any local codes

or ordinances that might apply.

FIRE HAZARD

Failure to follow this warning could result in personal

injury, death, or property damage.

Do not connect aluminum wire between disconnect switch

and furnace. Use only copper wire.

!WARNING

Use a separate, fused branch electrical circuit with a properly

sized fuse or circuit breaker for this furnace. See Table 7 for wire

size and fuse specifications. A readily accessible means of

electrical disconnect must be located within sight of the furnace.

NOTE: Proper polarity must be maintained for 115--v wiring. If

polarity is incorrect, control LED status indicator light will flash

rapidly and furnace will NOT operate.

J--BOX RELOCATION

NOTE: If factory location of J--Box is acceptable, go to next

section (ELECTRICAL CONNECTION TO J--BOX).

NOTE: On 14--in. (356 mm) wide casing models, the J--Box

shall not be relocated to other side of furnace casing when the

vent pipe is routed within the casing.

1. Remove and save two screws holding J--Box. (See Fig.

23.)

NOTE: The J--Box cover need not be removed from the J--Box

in order to move the J--Box. Do NOT remove green ground

screw inside J--Box. The ground screw is not threaded into the

casing flange and can be lifted out of the clearance hole in casing

while swinging the front edge of the J--Box outboard of the

casing.

2. Cut wire tie on loop in furnace wires attached to J--box.

3. Move J--Box to desired location.

4. Fasten J--Box to casing with two screws removed in Step

1.

5. Route J--Box wires within furnace away from sharp edges,

rotating parts and hot surfaces.

ELECTRICAL CONNECTION TO J--BOX

Field--Supplied Electrical Box on Furnace J--Box Bracket See

Fig. 24.

1. Remove cover from furnace J--Box.

2. Attach electrical box to furnace J--Box bracket with at least

two field--supplied screws through holes in electrical box

into holes in bracket. Use blunt--nose screws that will not

pierce wire insulation.

3. Route furnace power wires through holes in electrical box

and J--Box bracket, and make field--wire connections in

electrical box. Use best practices (NEC in U.S.) for wire

bushings, strain relief, etc.

4. Route and secure field ground wire to green ground screw

on J--Box bracket.

5. Connect line voltage leads as shown in Fig. 26.

6. Reinstall cover to J--Box. Do not pinch wires between

cover and bracket. Electrical Box on Furnace Casing Side

See Fig. 24.

FIRE OR ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal

injury, death, or property damage.

If field--supplied manual disconnect switch is to be mounted

on furnace casing side, select a location where a drill or

fastener cannot damage electrical or gas components.

!WARNING

1. Select and remove a hole knockout in the casing where the

electrical box is to be installed.

NOTE: Check that duct on side of furnace will not interfere with

installed electrical box.

2. Remove the desired electrical box hole knockout and posi-

tion the hole in the electrical box over the hole in the fur-

nace casing.

3. Fasten the electrical box to casing by driving two field

supplied screws from inside electrical box into casing

steel.

4. Remove and save two screws holding J--Box. (See Fig.

23.)

5. Pull furnace power wires out of 1/2--in. (12 mm) diameter

hole in J--Box. Do not loosen wires from strain--relief

wire--tie on outside of J--Box.

6. Route furnace power wires through holes in casing and

electrical box and into electrical box.

7. Pull field power wires into electrical box.

8. Remove cover from furnace J--Box.

9. Route field ground wire through holes in electrical box

and casing, and into furnace J--Box.

10. Reattach furnace J--Box to furnace casing with screws re-

movedinStep4.

11. Secure field ground wire to J--Box green ground screw.

310AAV

22

Table 7—Electrical Data

FURNACE SIZE

V O L T S ---

H E R T Z ---

PHASE

OPERATING VOLTAGE

RANGE MAXIMUM

UNIT AMPS

UNIT

AMPACITY#

MAXIMUM

WIRE

LENGTH FT.

(M)‡

MAXIMUM

FUSE OR

CKT BKR

AMPS†

MINIMUM

WIRE

GAUGE

Maximum* Minimum*

045---08/024045 1 1 5 --- 6 0 --- 1 127 104 5.2 7.26 49 (14.9) 15 14

045---12/036045 1 1 5 --- 6 0 --- 1 127 104 7.2 9.79 37 (11.2) 15 14

070---08/024070 1 1 5 --- 6 0 --- 1 127 104 5.1 7.14 51 (15.5) 15 14

070---12/036070 1 1 5 --- 6 0 --- 1 127 104 7.2 9.72 38 (11.5) 15 14

070---16/048070 1 1 5 --- 6 0 --- 1 127 104 9.5 12.60 29 (8.8) 15 14

090---14/042090 1 1 5 --- 6 0 --- 1 127 104 8.6 11.39 32 (9.7) 15 14

090---16/048090 1 1 5 --- 6 0 --- 1 127 104 10.0 13.09 28 (8.5) 15 14

090---20/060090 1 1 5 --- 6 0 --- 1 127 104 14.1 18.2 31 (9.4) 20 12

110---12/036110 1 1 5 --- 6 0 --- 1 127 104 8.6 11.27 32 (9.7) 15 14

110---16/048110 1 1 5 --- 6 0 --- 1 127 104 10.2 13.34 27 (8.2) 15 14

110---22/066110 1 1 5 --- 6 0 --- 1 127 104 15.1 19.42 29 (8.8) 20 12

135---16/048135 1 1 5 --- 6 0 --- 1 127 104 10.5 13.63 27 (8.2) 15 14

135---22/066135 1 1 5 --- 6 0 --- 1 127 104 14.5 18.72 30 (9.1) 20 12

155---20/060155 1 1 5 --- 6 0 --- 1 127 104 15.4 19.83 29 (8.8) 20 12

* Permissible limits of the voltage range at which the unit operates satisfactorily.

# Unit ampacity = 125 percent of largest operating component’s full load amps plus 100 percent of all other potential operating components’ (EAC, humidifier,

etc.) full load amps.

{Time---delay type is recommended.

}Length shown is as measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop.

12. Complete electrical box wiring and installation. Connect

line voltage leads as shown in Fig. 26. Use best practices

(NEC) for wire bushings, strain relief, etc.

13. Reinstall cover to J--Box. Do not pinch wires between

cover and bracket.

POWER CORD INSTALLATION IN FURNACE J--BOX

NOTE: Power cords must be able to handle the electrical

requirements listed in Table 7. Refer to power cord

manufacturer’s listings.

1. Remove cover from J--Box.

2. Route listed power cord through 7/8--in. (22 mm) diameter

hole in J--Box.

3. Secure power cord to J--Box bracket with a strain relief

bushing or a connector approved for the type of cord used.

4. Secure field ground wire to green ground screw on J--Box

bracket.

5. Connect line voltage leads as shown in Fig. 26.

6. Reinstall cover to J--Box. Do not pinch wires between

cover and bracket.

BX CABLE INSTALLATION IN FURNACE J--BOX

1. Remove cover from J--Box.

2. Route BX cable into 7/8--inch (22 mm) diameter hole in

J--Box.

3. Secure BX cable to J--Box bracket with connectors ap-

proved for the type of cable used.

4. Secure field ground wire to green ground screw on J--Box

bracket.

5. Connect line voltage leads as shown in Fig. 26.

6. Reinstall cover to J--Box. Do not pinch wires between

cover and bracket.

310AAV

23

BLW

NUETRAL

STATUS CODE LED

SEC-2 SEC-1

EAC-2 L2

FUSE 3-AMP

0.5 AMP@24VAC

HUM

TEST/TWIN

G Com W Y R

24V

120 180

90 150

BLOWER OFF-DELAY

PLT 1

COOL HEAT

SPARE-1 SPARE-2 EAC-1

1-AMP@

115VAC PR-1

L1

PL2 1

24-V THERMOSTAT

TERMINALS

3-AMP FUSE

LED OPERATION &

DIAGNOSTIC LIGHT

115-VAC(L2)NEUTRAL

CONNECTIONS

COOL

HEAT

SPARE-1

SPARE-2

BLOWER SPEED

SELECTION TERMINALS

EAC-1 TERMINAL

(115-VAC 1.0 AMP MAX.)

115 VAC (L1) LINE

VOLTAGE CONNECTION

PL2-HOT SURFACE

IGNITER & INDUCER

MOTOR CONNECTOR

PL1-LOW VOLTAGE MAIN

HARNESS CONNECTOR

TRANSFORMER 24-VAC

CONNECTIONS

HUMIDIFIER TERMINAL

(24-VAC 0.5 AMP MAX.)

TWINNING AND/OR

COMPONENT TEST

TERMINAL

BLOWER OFF-DELAY

J2

J2 JUMPER

PLT

A02100

Fig. 25 --- Furnace Control

115-V FIELD-

SUPPLIED

DISCONNECT

AUXILIARY

J-BOX

24-V

TERMINAL

BLOCK

THREE-WIRE

HEATING-ONLY

FIVE WIRE

NOTE 1

NOTE 2

FIELD-SUPPLIED

DISCONNECT

CONDENSING

UNIT

TWO

WIRE

FURNACE

C

O

N

T

R

O

L

R

G

COM

WCR GY

GND

GND

FIELD 24-V WIRING

FIELD 115-, 208/230-, 460-V WIRING

FACTORY 24-V WIRING

FACTORY 115-V WIRING

208/230- OR

460-V

THREE

PHASE

208/230-V

SINGLE

PHASE

BLOWER DOOR SWITCH

WHT

BLK

WHT

BLK

NOTES: Connect Y-terminal in furnace as shown for proper blower operation.

Some thermostats require a "C" terminal connection as shown.

If any of the original wire, as supplied, must be replaced, use

same type or equivalent wire.

W

Y/Y2

GND

THERMOSTAT

TERMINALS

1.

2.

3.

A99440

Fig. 26 --- Heating and Cooling Application Wiring Diagram with Single Stage Thermostat

310AAV

24

24--V WIRING

Make field 24--v connections at the 24--v terminal strip. (See Fig.

25.) Connect terminal Y as shown in Fig. 26 for proper cooling

operation. Use only AWG No. 18, color--coded, copper

thermostat wire.

The 24--v circuit contains an automotive--type, 3--amp. fuse

located on the control. Any direct shorts during installation,

service, or maintenance could cause this fuse to blow. If fuse

replacement is required, use ONLY a 3--amp. fuse of identical

size.

ACCESSORIES

1. Electronic Air Cleaner (EAC)

Connect an accessory Electronic Air Cleaner (if used) us-

ing 1/4--in female quick connect terminals to the two male

1/4--in quick--connect terminals on the control board

marked EAC--1 and EAC--2. The terminals are rated for

115 VAC, 1.0 amps maximum and are energized during

blower motor operation. (See Fig. 24.)

2. Humidifier (HUM)

Connect an accessory 24 VAC, 0.5 amp. maximum hu-

midifier (if used) to the 1/4--in male quick--connect HUM

terminal and COM--24V screw terminal on the control

board thermostat strip. The HUM terminal is energized

when gas valve relay (GVR) is energized. (See Fig. 24.)

NOTE: A field--supplied, 115--v controlled relay connected to

EAC terminals may be added if humidifier operation is desired

during blower operation.

NOTE: DO NOT connect furnace control HUM terminal to

HUM (humidifier) terminal on Thermidistatt, Zone Controller

or similar device. See Thermidistatt, Zone Controller,

thermostat, or controller manufacturer’s instructions for proper

connection.

VENTING

The furnace shall be connected to a listed factory built chimney

or vent, or a clay--tile lined masonry or concrete chimney. Venting

into an unlined masonry chimney or concrete chimney is

prohibited.

When an existing Category I furnace is removed or replaced, the

original venting system may no longer be sized to properly vent

the attached appliances. An improperly sized Category I venting

system could cause the formation of condensate in the furnace

and vent, leakage of condensate and combustion products, and

spillage of combustion products into the living space.

Vent system or vent connectors may need to be resized. Vent

systems or vent connectors, must be sized to approach minimum

size as determined using appropriate table found in the NFGC.

GENERAL VENTING REQUIREMENTS

Follow all safety codes for proper vent sizing and installation

requirements, including local building codes, the National Fuel

Gas Code ANSI Z223.1--2009/NFPA 54--2009 (NFGC), Parts 12

and 13, local building codes, and furnace and vent manufacturers’

instructions.

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:

1. Seal any unused openings in venting system.

2. Inspect the venting system for proper size and horizontal

pitch, as required in the National Fuel Gas Code, ANSI

Z223.1/NFPA 54 and these instructions. Determine that

there is no blockage or restriction, leakage, corrosion and

other deficiencies, which could cause an unsafe condition.

3. As far as practical, close all building doors and windows

and all doors between the space in which the appliance(s)

connected to the venting system are located and other

spaces of the building.

4. Close fireplace dampers.

5. Turn on clothes dryers and any appliance not connected

to the venting system. Turn on any exhaust fans, such as

range hoods and bathroom exhausts, so they are operating

at maximum speed. Do not operate a summer exhaust fan.

6. Follow the lighting instructions. Place the appliance

being inspected into operation. Adjust the thermostat so

appliance is operating continuously.

7. Test for spillage from draft hood equipped appliances at

the draft hood relief opening after 5 minutes of main burner

operation. Use the flame of a match or candle.

8. If improper venting is observed during any of the above

tests, the venting system must be corrected in accordance

with the National Fuel Gas Code, ANSI Z223.1/NFPA 54 .

9. After it has been determined that each appliance

connected to the venting system properly vents when tested

as outlined above, return doors, windows, exhaust fans,

fireplace dampers and any other gas--fired burning

appliance to their previous conditions of use.

!WARNING

These furnaces are design--certified as Category I furnaces in

accordance with ANSI Z21.47--2009/CSA 2.3--2009 and operate

with a non--positive vent static pressure to minimize the potential

for vent gas leakage. Category I furnaces operate with a flue loss

not less than 17 percent to minimize the potential for

condensation in the venting system. These furnaces are approved

for common venting and multistory venting with other fan

assisted or draft hood equipped appliances in accordance with the

NFGC, the local building codes, and furnace and vent

manufacturers’ instructions.

The following information and warning must be considered in

addition to the requirements defined in the NFGC.

CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in personal

injury or death.

Do not bypass the draft safeguard switch, as an unsafe

condition could exist which must be corrected.

!WARNING

310AAV

25

1. If a vent (common or dedicated) becomes blocked, the fur-

nace will be shut off by the draft safeguard switch located

on the vent elbow.

2. Do not connect this Category I furnace into a single--wall

dedicated or common vent. The dedicated or common

vent is considered to be the vertical portion of the vent

system that terminates outdoors.

3. Vent connectors serving Category I furnaces shall not be

connected into any portion of a mechanical draft system

operating under positive pressure.

4. Do not vent this appliance with any solid fuel burning ap-

pliance.

5. Category I furnaces must be vented vertically or nearly

vertically unless equipped with a listed power venter.

6. Do not vent this appliance into an unlined masonry chim-

ney. Refer to Chimney Inspection Chart, Fig. 27.

MASONRY CHIMNEY REQUIREMENTS

NOTE: These furnaces are CSA design--certified for use in

exterior clay tile--lined masonry chimneys with a factory

accessory Chimney Adapter Kit. Refer to the furnace rating plate

for correct kit usage. The Chimney Adapter Kits are for use with

ONLY furnaces having a Chimney Adapter Kit numbers marked

on the furnace rating plate.

If a clay tile--lined masonry chimney is being used and it is

exposed to the outdoors below the roof line, relining might be

required. Chimneys shall conform to the Standard for Chimneys,

Fireplaces, Vents, and Solid Fuel Burning Appliances

ANSI/NFPA 211--2009 and must be in good condition.

U.S.A.--Refer to NFPA 54/ANSI Z223.1--2009 Sections 13.1.8

and 13.2.20 of the NFGC or the authority having jurisdiction to

determine whether relining is required. If relining is required, use

a properly sized listed metal liner, Type--B vent, or a listed

alternative venting design.

NOTE: See the NFPA 54 / ANSI Z223.1--2009, 13.1.8 and

13.2.20 regarding alternative venting design and the Exception,

which cover installations such as the Chimney Adapter Kits

which are listed for use with these furnaces. The Chimney

Adapter Kit is listed alternative venting system for these furnaces.

See the kit instructions for complete details. See Table 17 for

accessory list.

This furnace is permitted to be vented into a clay tile--lined

masonry chimney that is exposed to the outdoors below the roof

line, provided:

1. Vent connector is Type--B double--wall, and

2. This furnace is common vented with at least 1 draft hood

equipped appliance, and

3. The combined appliance input rating is less than the max-

imum capacity given in Table 8 , and

4. The input rating of each space heating appliance is greater

than the minimum input rating given in Table 9 for the

local 99% Winter Design Temperature. Chimneys having

internal areas greater than 38 in2(24516 mm2) require fur-

nace input ratings greater than the input ratings of these

furnaces. See footnote at bottom of Table 9, and

5. The authority having jurisdiction approves.

If all of these conditions cannot be met, an alternative venting

design shall be used, such as the listed chimney adapter kit with

these furnaces, which are listed for use with the kit, a listed

chimney--lining system, or a Type--B common vent.

Inspections before the sale and at the time of installation will

determine the acceptability of the chimney or the need for repair

and/or (re)lining. Refer to the Fig. 27 to perform a chimney

inspection. If the inspection of a previously used tile--lined

chimney:

a. Shows signs of vent gas condensation, the chimney

should be relined in accordance with local codes and

the authority having jurisdiction. The chimney should

be relined with a listed metal liner, Type--B vent, or a

listed chimney adapter kit shall be used to reduce con-

densation. If a condensate drain is required by local

code, refer to the NFPA 54 / ANSI Z223.1--2009, Sec-

tion 12.10 for additional information on condensate

drains.

b. Indicates the chimney exceeds the maximum permiss-

ible size in the tables, the chimney should be rebuilt or

relined to conform to the requirements of the equip-

ment being installed and the authority having jurisdic-

tion.

A chimney without a clay tile liner, which is otherwise in good

condition, shall be rebuilt to conform to ANSI/NFPA 211 or be

lined with a UL listed metal liner or UL listed Type--B vent.

Relining with a listed metal liner or Type--B vent is considered to

be a vent--in--a--chase.

If a metal liner or Type--B vent is used to line a chimney, no other

appliance shall be vented into the annular space between the

chimney and the metal liner.

310AAV

26

A10133

Fig. 27 --- Chimney Inspection Chart

310AAV

27

APPLIANCE APPLICATION REQUIREMENTS

Appliance operation has a significant impact on the performance

of the venting system. If the appliances are sized, installed,

adjusted, and operated properly, the venting system and/or the

appliances should not suffer from condensation and corrosion.

The venting system and all appliances shall be installed in

accordance with applicable listings, standards, and codes.

The furnace should be sized to provide 100 percent of the design

heating load requirement plus any margin that occurs because of

furnace model size capacity increments. Heating load estimates

can be made using approved methods available from Air

Conditioning Contractors of America (Manual J); American

Society of Heating, Refrigerating, and Air--Conditioning

Engineers; or other approved engineering methods. Excessive

oversizing of the furnace could cause the furnace and/or vent to

fail prematurely.

When a metal vent or metal liner is used, the vent must be in

good condition and be installed in accordance with the vent

manufacturer’s instructions.

To prevent condensation in the furnace and vent system, the

following precautions must be observed:

1. The return--air temperature must be at least 60_F(16_C)

db except for brief periods of time during warm--up from

setback at no lower than 55_F(13_C) db or during initial

start--up from a standby condition.

2. Adjust the gas input rate per the installation instructions.

Low gas input rate causes low vent gas temperatures, caus-

ing condensation and corrosion in the furnace and/or vent-

ing system. Derating is permitted only for altitudes above

2000 ft. (610 M).

3. Adjust the air temperature rise to the midpoint of the rise

range or slightly above. Low air temperature rise can cause

low vent gas temperature and potential for condensation

problems.

4. Set thermostat heat anticipator or cycle rate to reduce short

cycling.

Air for combustion must not be contaminated by halogen

compounds which include chlorides, fluorides, bromides, and

iodides. These compounds are found in many common home

products such as detergent, paint, glue, aerosol spray, bleach,

cleaning solvent, salt, and air freshener, and can cause corrosion

of furnaces and vents. Avoid using such products in the

combustion--air supply. Furnace use during construction of the

building could cause the furnace to be exposed to halogen

compounds, causing premature failure of the furnace or venting

system due to corrosion.

Vent dampers on any appliance connected to the common vent

can cause condensation and corrosion in the venting system. Do

not use vent dampers on appliances common vented with this

furnace.

ADDITIONAL VENTING REQUIREMENTS

A 4--in. (102 mm) round vent elbow is supplied with the furnace.

A 5--in. (127 mm) or 6--in. (152 mm) vent connector may be

required for some model furnaces. A field--supplied 4--in. (102

mm) to 5--in. (127 mm) or 4--in. (102 mm) to 6--in. (152 mm)

sheet metal increaser fitting is required when 5--in. (127 mm) or

6--in. (152 mm) vent connector is used. See Fig. 28 -- 40 Venting

Orientation for approved vent configurations.

NOTE: Vent connector length for connector sizing starts at

furnace vent elbow. The 4--in. (102 mm) vent elbow is shipped

for upflow configuration and may be rotated for other positions.

Remove the 3 screws that secure vent elbow to furnace, rotate

furnace vent elbow to position desired, reinstall screws. The

factory--supplied vent elbow does NOT count as part of the

number of vent connector elbows.

The vent connector can exit the cabinet of the furnace through

one of 5 locations.

1. Attach the single wall vent connector to the furnace vent

elbow, and fasten the vent connector to the vent elbow

with at least two field--supplied, corrosion--resistant, sheet

metal screws located 180_apart.

NOTE: An accessory flue extension is available to extend from

the furnace elbow to outside the furnace casing. See Table 17 for

accessory list. If flue extension is used, fasten the flue extension

to the vent elbow with at least two field--supplied,

corrosion--resistant, sheet metal screws located 180_apart. Fasten

the vent connector to the flue extension with at least two

field--supplied, corrosion resistant sheet metal screws located

180_apart.

2. Vent the furnace with the appropriate connector as shown

in Fig. 28 -- 40.

CUT HAZARD

Failure to follow this caution may result in personal injury.

Sheet metal parts may have sharp edges or burrs.

Use care and wear appropriate protective clothing, safety

glasses and gloves when handling parts and servicing

furnaces.

CAUTION

!

3. Determine the correct location of the knockout to be re-

moved.

4. Use a hammer and screwdriver to strike a sharp blow

between the tie points and work the slug back and forth

until the slug breaks free.

BURN HAZARD

Failure to follow this caution may cause personal injury.

Hot vent pipe is within reach of small children when

installed in downflow position.

See the following instruction.

CAUTION

!

An accessory Vent Guard Kit is REQUIRED for downflow

applications for use where the vent exits through the lower

portion of the furnace casing. Refer to the Vent Guard Kit

Instructions for complete details. See Table 17 for accessory list.

The horizontal portion of the venting system shall slope upwards

not less than 1/4--in. (6 mm) per linear ft. (21 mm/m) from the

furnace to the vent and shall be rigidly supported every 5 ft. (1.5

M) or less with metal hangers or straps to ensure there is no

movement after installation.

SIDEWALL VENTING

This furnace is not approved for direct sidewall horizontal

venting.

Per section 12.4.3 of the NFPA 54 / ANSI Z223.1--2009, any

listed mechanical venter may be used, when approved by the

authority having jurisdiction.

310AAV

28

Table 8—Exterior Masonry Chimney Fan + Nat Installations

with Type--B Double Wall Vent Connectors ENFPA & AGA

Combined Appliance Maximum Input

Rating in Thousands of Btuh per Hour

VENT HEIGHT

FT. (M)

INTERNAL AREA OF CHIMNEY

SQ. IN. (SQ. MM)

12

(7741)

19

(12258)

28

(18064)

38

(24516)

6 (1.8) 74 119 178 257

8 (2.4) 80 130 193 279

10 (3.0) 84 138 207 299

15 (4.5) NR 152 233 334

20 (6.0) NR NR 250 368

30 (9.1) NR NR NR 404

Table 9—Minimum Allowable Input Rating of Space--Heat-

ing Appliance in Thousands of Btuh per Hour

VENT HEIGHT

FT. (M)

INTERNAL AREA OF CHIMNEY

SQ. IN. (SQ. MM)

12

(7741)

19

(12258)

28

18064)

38

(24516)

Local 99% Winter Design Temperature: 17 to 26 degrees F

6 0 55 99 141

852 74 111 154

10 NR 90 125 169

15 NR NR 167 212

20 NR NR 212 258

30 NR NR NR 362

Local 99% Winter Design Temperature: 5 to 16 degrees F*

6NR 78 121 166

8NR 94 135 182

10 NR 111 149 198

15 NR NR 193 247

20 NR NR NR 293

30 NR NR NR 377

Local 99% Winter Design Temperature: ---10 to 4 degrees F*

6NR NR 145 196

8NR NR 159 213

10 NR NR 175 231

15 NR NR NR 283

20 NR NR NR 333

30 NR NR NR NR

Local 99% Winter Design Temperature: ---11_F(16_C) or

lower

Not recommended for any vent configuration.

*The 99.6% heating db temperatures found in the 1997 or 2001 ASHRAE

Fundamentals Handbook, Climatic Design Information chapter, Table 1A

(United States) or the 2005 ASHRAE Fundamentals handbook, Climatic

Design Information chapter, and the CD---ROM included with the 2005

ASHRAE Fundamentals Handbook.

310AAV

29

Table 10—Minimum Vent Heights

Caution!! for the following applications, use the minimum vertical vent heights as specified below.

For all other applications, follow exclusively the national fuel gas code.

FURNACE

ORIENTATION

VENT

ORIENTATION

FURNACE

INPUT (BTUH/HR)

MINIMUM VENT

DIAMETER

IN. (mm)*

MINIMUM VERTICAL VENT

HEIGHT

FT. (M)**

Downflow Vent elbow left, then

up Fig. 32

154,000

132,000

110,000(036/--- 12 only)

5 (127) 12 (3.6)

Horizontal Left Vent elbow right,

then up Fig. 35

154,000

132,000 5 (127) 7 (.65)

Horizontal Left Vent Elbow up

Fig. 36

154,000

132,000 5 (127) 7 (,65)

Horizontal Left Vent elbow right

Fig. 37 154,000 5 (127) 7 (.65)

Downflow Vent elbow up then

left Fig. 30

110,000

(036/--- 12 only) 5 (127) 10 (3.0)

Downflow Vent elbow up, then

right Fig. 33

110,000

(036/--- 12 only) 5 (127) 10 (3.0)

* 4 in. (102 mm) inside casing or vent guard

** Including 4 in. (102 mm) vent section (s)

NOTE: All vent configurations must also meet National Fuel Gas Code (NFGC) venting requirements

NOTE: For all unlisted vent configurations, refer to National Fuel Gas Code (NFGC) venting requirements.

SEE NOTES: 1,2,4,7,8,9

on the page following

these figures

A03208

Fig. 28 --- Upflow Application--Vent Elbow Up

SEE NOTES: 1,2,3,4,7,8,9

on the pages following

these figures

A03209

Fig. 29 --- Upflow Application--Vent Elbow Right

310AAV

30

SEE NOTES:1,2,3,4,5,7,8,9

on the page following

these figures

A03210

Fig. 30 --- Downflow Application--Vent Elbow Up then Left

SEE NOTES: 1,2,4,5,7,8,9

on the page following

these figures

A03211

Fig. 31 --- Downflow Application--Vent Elbow Up

SEE NOTES: 1,2,4,5,6,7,8,9,10

on the page following these figures

A03207

Fig. 32 --- Downflow Application--Vent Elbow Left then Up

SEE NOTES:1,2,3,4,5,7,8,9

on the page following

these figures.

A03212

Fig. 33 --- Downflow Application--Vent Elbow Up then Right

SEE NOTES: 1,2,4,7,8,9 on the page

following these figures

A03213

Fig. 34 --- Horizontal Left Application--Vent Elbow Left

310AAV

31

SEE NOTES: 1,2,4,5,7,8,9 on the page

following these figures

A03214

Fig. 35 --- Horizontal Left Application--Vent Elbow Right

then Up

SEE NOTES: 1,2,4,5,7,8,9 on the page

following these figures

A03215

Fig. 36 --- Horizontal Left Application--Vent Elbow Up

SEE NOTES: 1,2,4,5,7,8,9 on the page

following these figures

A03216

Fig. 37 --- Horizontal Left Application--Vent Elbow Right

SEE NOTES: 1,2,4,7,8,9 on the page

following these figures

A03218

Fig. 38 --- Horizontal Right Application--Vent Elbow Right

SEE NOTES: 1,2,4,5,7,8,9 on the page

following these figures

A03219

Fig. 39 --- Horizontal Right Application--Vent Elbow Left

then Up

SEE NOTES: 1,2,4,5,7,8,9

A02068

Fig. 40 --- Horizontal Right Application--Vent Elbow Left

NOTES FOR FIGS. 33 -- 45

1. For common vent, vent connector sizing and vent material, use the NFGC.

2. Immediately increase to 5--in. (127 mm) or 6--in. (152 mm) vent connector outside furnace casing when 5--in. (127 mm) vent connector is required,

refer to Note 1 above.

3. Side outlet vent for upflow and downflow installations must use Type B vent immediately after exiting the furnace, except when field--approved

Downflow Vent Guard Kit, is used in the downflow position. See Table 17 for accessory list.

4. Type--B vent where required, refer to the Note 1 above.

5. A 4--in. (102 mm) single--wall (26 ga. minimum) vent must be used inside furnace casing and when the field--approved Downflow Vent Guard Kit is

used external to the furnace. See Table 17 for accessory list.

6. Accessory Downflow Vent Guard Kit required in downflow installations with lower vent configuration. See Table 17 for accessory list.

7. Chimney Adapter Kit may be required for exterior masonry chimney applications. Refer to Chimney Adapter Kit for sizing and complete application

details. See Table 17 for accessory list.

8. Secure vent connector to furnace elbow with (2) corrosion--resistant sheet metal screws, spaced approximately 180°apart.

9. Secure all other single wall vent connector joints with (3) corrosion resistant screws spaced approximately 120°apart. Secure Type--B vent connect-

ors per vent connector manufacturer’s recommendations.

10. The total height of the vent and connector shall be at least seven ft. (2.1 M) for the 154,000 Btuh gas input rate model when installed in a downflow

application with furnace elbow turned to left side with the connector elbow outside furnace casing pointing upward. (See Fig. 31.)

310AAV

32

START--UP, ADJUSTMENT, AND SAFETY

CHECK

Step 1 —General

FIRE HAZARD

Failure to follow this warning could result in personal

injury, death and/or property damage.

This furnace is equipped with manual reset limit switches in

the gas control area. The switches open and shut off power

to the gas valve if a flame rollout or overheating condition

occurs in the gas control area. DO NOT bypass the

switches. Correct inadequate combustion air supply

problem before resetting the switches.

!WARNING

CUT HAZARD

Failure to follow this caution may result in personal injury.

Sheet metal parts may have sharp edges or burrs.

Use care and wear appropriate protective clothing, safety

glasses, and gloves when handling parts and servicing

furnaces.

CAUTION

!

1. Maintain 115--v wiring and ground. Improper polarity will

result in rapid flashing LED and no furnace operation.

2. Make thermostat wire connections at the 24--v terminal

block on the furnace control. Failure to make proper con-

nections will result in improper operation. (See Fig. 26.)

3. Gas supply pressure to the furnace must be greater than

4.5--In. W.C. (0.16 psig ) but not exceed 14--In. W.C. (0.5

psig).

4. Check all manual--reset switches for continuity.

5. Install blower compartment door. Door must be in place to

operate furnace.

6. Replace outer door.

Step 2 —Start--Up Procedures

FIRE AND EXPLOSION HAZARD

Failure to follow this warning could result in personal

injury, death and or property damage.

Never test for gas leaks with an open flame. Use a

commercially available soap solution made specifically for

the detection of leaks to check all connections.

!WARNING

1. Purge gas lines after all connections have been made.

2. Check gas lines for leaks.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal

injury, or death.

Blower access door switch opens 115--v power to control.

No component operation can occur unless switch is closed.

Caution must be taken when manually closing this switch

for service purposes.

!WARNING

3. To Begin Component Self--Test: Remove blower access

door. Disconnect the thermostat R lead from the furnace

control board. Manually close the blower door switch.

Short (jumper) the COM--24v terminal on control to the

TEST/TWIN 3/16--inch quick connect terminal on control

until LED goes out (approximately 2 sec). Gas valve and

humidifier will not be turned on. (See Fig. 25.)

NOTE: The furnace control allows all components, except the

gas valve, to be run for short period of time. This feature helps

diagnose a system problem in case of a component failure.

Component test feature will not operate if any thermostat signal is

present at the control.

Component test sequence is as follows:

Refer to service label attached to furnace or see Fig. 45.

a. LED will display previous status code 4 times.

b. Inducer motor starts and continues to run until Step f

of component test sequence.

c. Hot surface igniter is energized for 15 sec., then off.

d. Blower motor operates on HEAT speed for 10 sec.

e. Blower motor operates on COOL speed for 10 sec.

f. Inducer motor stops.

g. Reconnect R lead to furnace control board, release

blower door switch and re--install blower door.

4. Operate furnace per instruction on door.

5. Verify furnace shut down by lowering thermostat setting

below room temperature.

6. Verify furnace restarts by raising thermostat setting above

room temperature.

Step 3 —Adjustments

Table 11—Altitude Derate Multiplier for U.S.A.

ALTITUDE

FT. (M)

PERCENT

OF DERATE

DERATE MULTIPLIER

FACTOR*

0–2000

(0---610) 01.00

2001–3000

(610---914) 8–12 0.90

3001–4000

(914---1219) 12–16 0.86

4001–5000

(1219---1524) 16–20 0.82

5001–6000

1524---1829) 20–24 0.78

6001–7000

(1829---2134) 24–28 0.74

7001–8000

(2134---2438) 28–32 0.70

8001–9000

(2438---2743) 32–36 0.66

9001–10,000

(2743---3048) 36–40 0.62

* Derate multiplier factors are based on midpoint altitude for altitude

range.

FIRE HAZARD

Failure to follow this warning could result in injury, death

and/or property damage.

DO NOT bottom out gas valve regulator adjusting screw.

This can result in unregulated manifold pressure and result

in excess overfire and heat exchanger failures.

!WARNING

310AAV

33

FURNACE DAMAGE HAZARD

Failure to follow this caution may result in reduced furnace

life.

DO NOT redrill orifices. Improper drilling (burrs, out--of

round holes, etc.) can cause excessive burner noise and

misdirection of burner flames. This can result in flame

impingement of heat exchangers, causing failures. (See Fig.

43.)

CAUTION

!

Furnace gas input rate on rating plate is for installations at

altitudes up to 2000 ft. (610 M). Furnace input rate must be

within +/--2 percent of furnace rating plate input.

1. Determine the correct gas input rate.

The input rating for altitudes above 2,000 ft. (610 M) must

be reduced by 4 percent for each 1,000 ft. (305 M) above

sea level. For installations below 2000 ft., refer to the unit

rating plate. For installations above 2000 ft. (610 M), mul-

tiply the input on the rating plate by the derate multiplier

in Table 11 for the correct input rate.

2. Determine the correct orifice and manifold pressure adjust-

ment. There are two different orifice and manifold adjust-

ment tables. All models in all positions, except Low NOx

models in downflow or horizontal positions, use Table 15

(22,000 Btuh/Burner).

Low NOx models in the downflow or horizontal positions

must use Table 16 (21,000 Btuh/Burner). See input listed

on rating plate.

a. Obtain average yearly gas heat value (at installed alti-

tude) from local gas supplier.

b. Obtain average yearly gas specific gravity from local

gas supplier.

c. Find installation altitude in Table 15 or 16.

d. Find closest natural gas heat value and specific gravity

in Table 15 or 16.

e. Follow heat value and specific gravity lines to point of

intersection to find orifice size and manifold pressure

settings for proper operation.

f. Check and verify burner orifice size in furnace.

NEVER ASSUME ORIFICE SIZE. ALWAYS

CHECK AND VERIFY.

g. Replace orifice with correct size if required by Table

15 or 16. Use only factory--supplied orifices. See

EXAMPLE 2.

EXAMPLE 2: (0--2000 ft. (0--610 M) altitude)

For 22,000 Btuh per burner application use Table 15.

Heating value = 1000 Btuh/cu ft.

Specific gravity = 0.62

Therefore: Orifice No. 43*

Manifold pressure: 3.7--In. W.C.

*Furnace is shipped with No. 43 orifices. In this example all

main burner orifices are the correct size and do not need to be

changed to obtain proper input rate.

3. Adjust manifold pressure to obtain correct input rate.

a. Turn gas valve ON/OFF switch to OFF.

b. Remove manifold pressure tap plug from gas valve.

(See Fig. 42.)

c. Connect a water column manometer or similar device

to manifold pressure tap.

d. Turn gas valve ON/OFF switch to ON.

e. Manually close blower door switch.

f. Set thermostat to call for heat.

g. Jumper R and W thermostat connections on furnace

control board to start furnace.

h. Remove regulator seal cap and turn regulator adjusting

screw counterclockwise (out) to decrease input rate of

clockwise (in) to increase input rate.

i. Install regulator seal cap.

j. Leave manometer or similar device connected and

proceed to Step 4.

NOTE: DO NOT set manifold pressure less than 3.2--In. W.C. or

more than 3.8--In. W.C. for natural gas at sea level. If manifold

pressure is outside this range, change main burner orifices or refer

Table 15 or 16.

NOTE: If orifice hole appears damaged or it is suspected to have

been redrilled, check orifice hole with a numbered drill bit of

correct size. Never redrill an orifice. A burr--free and squarely

aligned orifice hole is essential for proper flame characteristics.

4. Verify natural gas input rate by clocking meter.

NOTE: Gas valve regulator adjustment cap must be in place for

proper input to be clocked.

a. Turn off all other gas appliances and pilots served by

the meter.

b. Run furnace for 3 minutes in heating operation.

c. Measure time (in sec) for gas meter to complete 1 re-

volution and note reading. The 2 or 5 cubic feet dial

provides a more accurate measurement of gas flow.

d. Refer to Table 13 for cubic ft. of gas per hr.

e. Multiply gas rate (cu ft./hr) by heating value (Btu/cu

ft.) to obtain input.

If clocked rate does not match required input from Step 1,

increase manifold pressure to increase input or decrease manifold

pressure to decrease input. Repeat steps b through e until correct

input is achieved. Reinstall regulator seal cap on gas valve.

5. Set temperature rise. The furnace must operate within the

temperature rise ranges specified on the furnace rating

plate. Do not exceed temperature rise range specified on

unit rating plate. Determine the temperature rise as fol-

lows:

NOTE: Blower access door must be installed when taking

temperature rise reading. Leaving blower access door off will

result in incorrect temperature measurements.

a. Place thermometers in return and supply ducts as close

to furnace as possible. Be sure thermometers do not

see radiant heat from heat exchangers. Radiant heat

affects temperature rise readings. This practice is par-

ticularly important with straight--run ducts.

b. When thermometer readings stabilize, subtract return--

air temperature from supply--air temperature to determ-

ine air temperature rise.

NOTE: Blower access door must be installed for proper

temperature rise measurement.

NOTE: If the temperature rise is outside this range, first check:

SGas input for heating operation.

SDerate for altitude if applicable.

SReturn and supply ducts for excessive restrictions caus-

ing static pressures greater than 0.50--In. W.C.

SDirty filter.

310AAV

34

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal

injury or death.

Disconnect 115--v electrical power and install lockout tag

before changing speed tap.

!WARNING

c. Adjust air temperature rise by adjusting blower speed.

Increase blower speed to reduce temperature rise.

Decrease blower speed to increase temperature rise.

d. Turn thermostat down below room temperature and

remove blower access door.

e. To change motor speed selection for heating, remove

blower motor lead from control HEAT terminal (See

Fig. 25.) Select desired blower motor speed lead from

one of the other terminals and relocate it to the HEAT

terminal (See Table 12 for lead color identification).

Reconnect original lead to SPARE terminal.

Table 12—Speed Selection

COLOR SPEED AS SHIPPED

White Common BLW

Black High COOL

Yellow{M e d --- H i g h SPARE

Blue* M e d --- L o w SPARE

Red* Low HEAT

* 1/5 HP motor models: BLUE to HEAT, RED to SPARE

{Not available on 1/5 HP motors.

NOTE: Continuous blower is the HEAT speed.

f. Repeat steps a through e.

g. When correct input rate and temperature rise is

achieved, turn gas valve ON/OFF switch to OFF.

h. Remove manometer or similar device from gas valve.

i. Reinstall manifold pressure tap plug in gas valve.

FIRE HAZARD

Failure to follow this warning could result in personal

injury, death and/or property damage.

Reinstall manifold pressure tap plug in gas valve to

prevent gas leak.

!WARNING

j. Reinstall blower access door if removed.

k. Turn gas valve ON/OFF switch to ON.

FURNACE OVERHEATING HAZARD

Failure to follow this caution may result in reduced furnace

life.

Recheck temperature rise. It must be within limits specified

on the rating plate. Recommended operation is at the

midpoint of rise range or slightly above.

CAUTION

!

6. Set thermostat heat anticipator.

a. Mechanical thermostat -- Set thermostat heat anticipat-

or to match the amp. draw of the electrical components

in the R--W circuit. Accurate amp. draw readings can

be obtained at the wires normally connected to ther-

mostat subbase terminals, R and W. The thermostat

anticipator should NOT be in the circuit while measur-

ing current. (1.) Remove thermostat from subbase or

from wall. (2.) Connect an amp. meter as shown in

Fig. 44 across the R and W subbase terminals or R and

W wires at wall.

(3.) Record amp. draw across terminals when furnace

is in heating and after blower starts.

(4.) Set heat anticipator on thermostat per thermostat

instructions and install on subbase or wall.

b. Electronic thermostat: Set cycle rate for 4 cycles per

hr.

7. Adjust blower off delay The blower off delay has 4 ad-

justable settings from 90 sec to 180 sec. The blower off

delay jumpers are located on the furnace control board.

(See Fig. 25.) To change the blower off delay setting,

move the jumper from one set of pins on the control to the

pins used for the selected blower off delay. Factory off

delay setting is 120 sec.

8. Set airflow CFM for cooling Select the desired blower

motor speed lead for cooling airflow. See Table 5--Air De-

livery--CFM (With Filter). See Table 12 for lead color

identification.

310AAV

35

A08411

Fig. 41 --- Wiring Diagram

310AAV

36

A06666

Fig. 42 --- Gas Control Valve

BURNER

ORIFICE

A93059

Fig. 43 --- Orifice Hole

R Y W G

10 TURNS

THERMOSTAT SUBBASE

TERMINALS WITH

THERMOSTAT REMOVED

(ANITICIPATOR, CLOCK, ETC.,

MUST BE OUT OF CIRCUIT.)

HOOK-AROUND

AMMETER

EXAMPLE: 5.0 AMPS ON AMMETER

10 TURNS AROUND JAWS

= 0.5 AMPS FOR THERMOSTAT

ANTICIPATOR SETTING

FROM UNIT 24-V

CONTROL TERMINALS

A96316

Fig. 44 --- Amp. Draw Check With Ammeter

310AAV

37

Step 4 —Check Safety Controls

The flame sensor, gas valve, and pressure switch were all checked

in the Start--up procedure section as part of normal operation.

1. Check Main Limit Switch(es)

This control shuts off combustion control system and en-

ergizes air--circulating blower motor, if furnace overheats.

By using this method to check limit control, it can be es-

tablished that limit is functioning properly and will operate

if there is a restricted duct system or motor failure. If limit

control does not function during this test, cause must be

determined and corrected.

a. Run furnace for at least 5 minutes.

b. Gradually block off return air with a piece of card-

board or sheet metal until the limit trips.

c. Unblock return air to permit normal circulation.

d. Burners will re--light when furnace cools down.

2. Check draft safeguard switch.

The purpose of this control is to cause the safe shutdown

of the furnace during certain blocked vent conditions.

a. Verify vent pipe is cool to the touch.

b. Disconnect power to furnace and remove vent con-

nector from furnace vent elbow.

c. Restore power to furnace and set room thermostat

above room temperature.

d. After normal start--up, allow furnace to operate for 2

minutes, then block vent elbow in furnace 80 percent

of vent area with a piece of flat sheet metal.

e. Furnace should cycle off within 2 minutes. If gas does

not shut off within 2 minutes, determine reason draft

safeguard switch did not function properly and correct

condition.

f. Remove blockage from furnace vent elbow.

g. Switch will auto--reset when it cools.

h. Re--install vent connector.

NOTE: Should switch remain open longer than 3 minutes,

furnace control board will lockout the furnace for 3 hrs. To reset

furnace control board, turn thermostat below room temperature or

from HEAT to OFF and turn 115v power OFF, then back ON.

3. Check Pressure Switch This control proves operation of

the draft inducer blower.

a. Turn off 115--v power to furnace.

b. Disconnect inducer motor lead wires from wire har-

ness.

c. Turn on 115--v power to furnace.

d. Set thermostat to “call for heat” and wait 1 minute.

When pressure switch is functioning properly, hot sur-

face igniter should NOT glow and control diagnostic

light flashes a status code 32. If hot surface igniter

glows when inducer motor is disconnected, shut down

furnace immediately.

e. Determine reason pressure switch did not function

properly and correct condition.

f. Turn off 115--v power to furnace.

g. Reconnect inducer motor wires, replace outer door,

andturnon115--vpower.

h. Blower will run for 90 sec before beginning the call

for heat again.

i. Furnace should ignite normally.

Step 5 —Checklist

1. Put away tools and instruments. Clean up debris.

2. Verify that blower OFF--DELAY time is selected as de-

sired.

3. Verify that blower and burner access doors are properly in-

stalled.

4. Cycle test furnace with room thermostat.

5. Check operation of accessories per manufacturer’s instruc-

tions.

6. Review User’s Guide with owner.

7. Attach literature packet to furnace.

310AAV

38

Table 13—Gas Rate (cu ft./hr)

SECONDS FOR 1

REVOLUTION

SIZE OF TEST DIAL SECONDS FOR 1

REVOLUTION

SIZE OF TEST DIAL

1CuFt 2CuFt 5CuFt 1CuFt 2CuFt 5CuFt

10 360 720 1800 50 72 144 360

11 327 655 1636 51 71 141 355

12 300 600 1500 52 69 138 346

13 277 555 1385 53 68 136 340

14 257 514 1286 54 67 133 333

15 240 480 1200 55 65 131 327

16 225 450 1125 56 64 129 321

17 212 424 1059 57 63 126 316

18 200 400 1000 58 62 124 310

19 189 379 947 59 61 122 305

20 180 360 900 60 60 120 300

21 171 343 857 62 58 116 290

22 164 327 818 64 56 112 281

23 157 313 783 66 54 109 273

24 150 300 750 68 53 106 265

25 144 288 720 70 51 103 257

26 138 277 692 72 50 100 250

27 133 267 667 74 48 97 243

28 129 257 643 76 47 95 237

29 124 248 621 78 46 92 231

30 120 240 600 80 45 90 225

31 116 232 581 82 44 88 220

32 113 225 563 84 43 86 214

33 109 218 545 86 42 84 209

34 106 212 529 88 41 82 205

35 103 206 514 90 40 80 200

36 100 200 500 92 39 78 196

37 97 195 486 94 38 76 192

38 95 189 474 96 38 75 188

39 92 185 462 98 37 74 184

40 90 180 450 100 36 72 180

41 88 176 439 102 35 71 178

42 86 172 429 104 35 69 173

43 84 167 419 106 34 68 170

44 82 164 409 108 33 67 167

45 80 160 400 110 33 65 164

46 78 157 391 112 32 64 161

47 76 153 383 116 31 62 155

48 75 150 375 120 30 60 150

49 73 147 367

Table 14—Filter Size Information (In. / mm)

FURNACE CASING WIDTH

FILTER SIZE

FILTER TYPESIDE

RETURN

BOTTOM

RETURN

14---1/2 (368) 16 x25 x3/4

(406 x635 x19)

14 x25 x3/4

(356 x635 x19) Washable*

17---1/2 (445) 16 x25 x3/4

(406 x635 x19)

16 x25 x3/4

(406 x635 x19) Washable*

21 (533) 16 x25 x3/4

(406 x635 x19)

20 x25 x3/4

(508 x635 x19) Washable*

24 (610) 16 x25 x3/4

(406 x635 x19)

24 x25 x3/4

(610 x635 x19) Washable*

* Recommended

** Some furnaces may have 2 filters.

310AAV

39

Table 15—Orifice Size* and Manifold Pressure (In. W.C.) for Gas Input Rate

(Tabulated data based on 22,000 btuh per burner, derated 4 percent for each 1000 ft. (305 M) above sea level)

ALTITUDE RANGE

FT. (M)

AVG. GAS

HEAT VALUE

AT ALTITUDE

(BTU/CU FT.)

SPECIFIC GRAVITY OF NATURAL GAS

0.58 0.60 0.62 0.64

Orifice

No.

Manifold

Pressure

Orifice

No.

Manifold

Pressure

Orifice

No.

Manifold

Pressure

Orifice

No.

Manifold

Pressure

U.S.A.

0to

2000

(0 to

610)

900 42 3.5 42 3.6 42 3.7 41 3.5

925 42 3.3 42 3.4 42 3.5 42 3.7

950 43 3.8 42 3.3 42 3.4 42 3.5

975 43 3.6 43 3.8 42 3.2 42 3.3

1000 43 3.5 43 3.6 43 3.7 43 3.8

1025 43 3.3 43 3.4 43 3.5 43 3.6

1050 44 3.6 43 3.2 43 3.4 43 3.5

1075 44 3.4 44 3.5 43 3.2 43 3.3

1100 44 3.3 44 3.4 44 3.5 43 3.2

U.S.A.

2001 to

3000

(610 to

914)

800 42 3.4 42 3.5 42 3.6 42 3.7

825 42 3.2 42 3.3 42 3.4 42 3.5

850 43 3.7 43 3.8 42 3.2 42 3.3

875 43 3.5 43 3.6 43 3.7 43 3.8

900 43 3.3 43 3.4 43 3.5 43 3.6

925 43 3.1 43 3.2 43 3.3 43 3.4

950 43 2.9 43 3.0 43 3.1 43 3.2

975 43 2.8 43 2.9 43 3.0 43 3.1

1000 43 2.6 43 2.7 43 2.8 43 2.9

U.S.A.

3001 to

4000

(914 to

1219)

775 42 3.2 42 3.3 42 3.4 42 3.5

800 43 3.6 43 3.8 42 3.2 42 3.3

825 43 3.4 43 3.5 43 3.7 43 3.8

850 43 3.2 43 3.3 43 3.4 43 3.6

875 43 3.0 43 3.1 43 3.3 43 3.4

900 43 2.9 43 3.0 43 3.1 43 3.2

925 43 2.7 43 2.8 43 2.9 43 3.0

950 43 2.6 43 2.7 43 2.8 43 2.8

U.S.A.

4001 to

5000

(1219 to

1524)

750 43 3.6 43 3.8 42 3.2 42 3.3

775 43 3.4 43 3.5 43 3.6 43 3.8

800 43 3.2 43 3.3 43 3.4 43 3.5

825 43 3.0 43 3.1 43 3.2 43 3.3

850 43 2.8 43 2.9 43 3.0 43 3.1

875 43 2.7 43 2.8 43 2.9 43 2.9

900 43 2.5 43 2.6 43 2.7 43 2.8

925 43 2.4 43 2.5 43 2.6 43 2.6

* Orifice numbers 43 are factory installed.

310AAV

40

Table 15–Orifice Size* and Manifold Pressure (In. W.C.) for Gas Input Rate (Continued)

(Tabulated data based on 22,000 btuh per burner, derated 4 percent for each 1000 ft. (305 M) above sea level)

ALTITUDE RANGE

FT. (M)

AVG. GAS

HEAT VALUE

AT ALTITUDE

(BTU/CU FT.)

SPECIFIC GRAVITY OF NATURAL GAS

0.58 0.60 0.62 0.64

Orifice

No.

Manifold

Pressure

Orifice

No.

Manifold

Pressure

Orifice

No.

Manifold

Pressure

Orifice

No.

Manifold

Pressure

U.S.A.

5001 to

6000

(1524

to

1829)

725 43 3.4 43 3.5 43 3.6 43 3.7

750 43 3.2 43 3.3 43 3.4 43 3.5

775 43 3.0 43 3.1 43 3.2 43 3.3

800 43 2.8 43 2.9 43 3.0 43 3.1

825 43 2.6 43 2.7 43 2.8 43 2.9

850 43 2.5 43 2.5 43 2.6 43 2.7

875 43 2.3 43 2.4 43 2.5 43 2.6

900 43 2.2 43 2.3 43 2.3 43 2.4

U.S.A.

6001 to

7000

(1829

to

2134)

675 43 3.4 43 3.5 43 3.6 43 3.7

700 43 3.1 43 3.3 43 3.4 43 3.5

725 43 2.9 43 3.0 43 3.1 43 3.2

750 43 2.7 43 2.8 43 2.9 43 3.0

775 43 2.6 43 2.7 43 2.7 43 2.8

800 43 2.4 43 2.5 43 2.6 43 2.7

825 43 2.3 43 2.3 43 2.4 43 2.5

850 43 2.1 43 2.2 43 2.3 43 2.4

U.S.A.

7001 to

8000

(2134

to

2438)

650 43 3.1 43 3.2 43 3.4 43 3.5

675 43 2.9 43 3.0 43 3.1 43 3.2

700 43 2.7 43 2.8 43 2.9 43 3.0

725 43 2.5 43 2.6 43 2.7 43 2.8

750 43 2.4 43 2.4 43 2.5 43 2.6

775 43 2.2 43 2.3 43 2.4 43 2.4

800 43 2.1 43 2.1 43 2.2 43 2.3

825 48 3.7 43 2.0 43 2.1 43 2.2

U.S.A.

8001 to

9000

(2438

to

2743)

625 43 2.9 43 3.0 43 3.1 43 3.2

650 43 2.7 43 2.8 43 2.9 43 3.0

675 43 2.5 43 2.6 43 2.7 43 2.8

700 43 2.3 43 2.4 43 2.5 43 2.6

725 43 2.2 43 2.2 43 2.3 43 2.4

750 43 2.0 43 2.1 43 2.2 43 2.2

U.S.A.

9001 to

10,000

(2743

to

3048)

600 43 2.7 43 2.8 43 2.9 43 3.0

625 43 2.5 43 2.6 43 2.6 43 2.7

650 43 2.3 43 2.4 43 2.4 43 2.5

675 43 2.1 43 2.2 43 2.3 43 2.3

700 48 3.7 43 2.0 43 2.1 43 2.2

725 48 3.5 48 3.6 48 3.7 43 2.0

775 48 3.6 48 3.7 43 2.0 43 2.1

* Orifice numbers 43 are factory installed.

310AAV

41

Table 16—Orifice Size* and Manifold Pressure (In. W.C.) for Gas Input Rate

(Tabulated data based on 21,000 btuh per burner, derated 4 percent for each 1000 ft. (305 M) above sea level)

ALTITUDE

RANGE

FT. (M)

SPECIFIC GRAVITY OF NATURAL GAS

AVG. GAS

HEAT VALUE

AT ALTITUDE

(BTU/CU FT.)

0.58 0.60 0.62 0.64

Orifice

No. Manifold

Pressure Orifice

No. Manifold

Pressure Orifice

No. Manifold

Pressure Orifice

No. Manifold

Pressure

U.S.A. 0 to 2000

(0 to 610)

900 42 3.2 42 3.3 42 3.4 42 3.5

925 43 3.7 43 3.8 42 3.2 42 3.3

950 43 3.5 43 3.6 43 3.7 43 3.8

975 43 3.3 43 3.4 43 3.5 43 3.7

1000 44 3.6 43 3.3 43 3.4 43 3.5

1025 44 3.4 44 3.6 43 3.2 43 3.3

1050 44 3.3 44 3.4 44 3.5 43 3.2

1075 45 3.8 44 3.2 44 3.3 44 3.4

1100 46 3.8 45 3.7 44 3.2 44 3.3

U.S.A.

2001 to

3000

(610 to

914)

800 43 3.8 42 3.2 42 3.3 42 3.4

825 43 3.5 43 3.7 43 3.8 42 3.2

850 43 3.3 43 3.5 43 3.6 43 3.7

875 43 3.2 43 3.3 43 3.4 43 3.5

900 43 3.0 43 3.1 43 3.2 43 3.3

925 43 2.8 43 2.9 43 3.0 43 3.1

950 43 2.7 43 2.8 43 2.9 43 2.9

975 43 2.5 43 2.6 43 2.7 43 2.8

1000 43 2.4 43 2.5 43 2.6 43 2.7

U.S.A.

3001 to

4000

(914 to

1219)

775 43 3.5 43 3.7 43 3.8 42 3.2

800 43 3.3 43 3.4 43 3.5 43 3.7

825 43 3.1 43 3.2 43 3.3 43 3.4

850 43 2.9 43 3.0 43 3.1 43 3.2

875 43 2.8 43 2.9 43 3.0 43 3.1

900 43 2.6 43 2.7 43 2.8 43 2.9

925 43 2.5 43 2.6 43 2.7 43 2.7

950 43 2.4 43 2.4 43 2.5 43 2.6

U.S.A.

4001 to

5000

(1219 to

1524)

750 43 3.3 43 3.4 43 3.5 43 3.6

775 43 3.1 43 3.2 43 3.3 43 3.4

800 43 2.9 43 3.0 43 3.1 43 3.2

825 43 2.7 43 2.8 43 2.9 43 3.0

850 43 2.6 43 2.7 43 2.8 43 2.8

875 43 2.4 43 2.5 43 2.6 43 2.7

900 43 2.3 43 2.4 43 2.5 43 2.5

925 43 2.2 43 2.2 43 2.3 43 2.4

* Orifice numbers 43 are factory installed.

310AAV

42

Table 16—Orifice Size* and Manifold Pressure (In. W.C.) for Gas Input Rate (Continued)

(Tabulated data based on 21,000 btuh per burner, derated 4 percent for each 1000 ft. (305 M) above sea level)

ALTITUDE

RANGE

FT. (M)

AVG. GAS

HEAT VALUE

AT

ALTITUDE

(BTU/CU FT.)

SPECIFIC GRAVITY OF NATURAL GAS

0.58 0.60 0.62 0.64

Orifice

No.

Manifold

Pressure

Orifice

No.

Manifold

Pressure

Orifice

No.

Manifold

Pressure

Orifice

No.

Manifold

Pressure

U.S.A.

5001 to

6000

(1524 to

1829)

725 43 3.1 43 3.2 43 3.3 43 3.4

750 43 2.9 43 3.0 43 3.1 43 3.2

775 43 2.7 43 2.8 43 2.9 43 3.0

800 43 2.5 43 2.6 43 2.7 43 2.8

825 43 2.4 43 2.5 43 2.5 43 2.6

850 43 2.2 43 2.3 43 2.4 43 2.5

875 43 2.1 43 2.2 43 2.3 43 2.3

900 43 2.0 43 2.1 43 2.1 43 2.2

U.S.A.

6001 to

7000

(1829 to

2134)

675 43 3.1 43 3.2 43 3.3 43 3.4

700 43 2.9 43 3.0 43 3.1 43 3.2

725 43 2.7 43 2.8 43 2.9 43 2.9

750 43 2.5 43 2.6 43 2.7 43 2.8

775 43 2.3 43 2.4 43 2.5 43 2.6

800 43 2.2 43 2.3 43 2.3 43 2.4

825 43 2.1 43 2.1 43 2.2 43 2.3

850 48 3.7 43 2.0 43 2.1 43 2.1

U.S.A.

7001 to

8000

(2134 to

2438)

650 43 2.9 43 3.0 43 3.1 43 3.2

675 43 2.7 43 2.7 43 2.8 43 2.9

700 43 2.5 43 2.6 43 2.6 43 2.7

725 43 2.3 43 2.4 43 2.5 43 2.5

750 43 2.1 43 2.2 43 2.3 43 2.4

775 43 2.0 43 2.1 43 2.2 43 2.2

800 48 3.6 48 3.7 43 2.0 43 2.1

825 48 3.3 48 3.5 48 3.6 48 3.7

U.S.A.

8001 to

9000

(2438 to

2743)

625 43 2.7 43 2.7 43 2.8 43 2.9

650 43 2.5 43 2.5 43 2.6 43 2.7

675 43 2.3 43 2.4 43 2.4 43 2.5

700 43 2.1 43 2.2 43 2.3 43 2.3

725 48 3.7 43 2.0 43 2.1 43 2.2

750 48 3.5 48 3.6 48 3.7 43 2.0

U.S.A.

9001 to

10,000

(2743 to

3048)

600 43 2.4 43 2.5 43 2.6 43 2.7

625 43 2.3 43 2.3 43 2.4 43 2.5

650 43 2.1 43 2.2 43 2.2 43 2.3

675 48 3.6 48 3.8 43 2.1 43 2.1

700 48 3.4 48 3.5 48 3.6 48 3.7

725 49 3.7 49 3.8 48 3.4 48 3.5

775 49 3.8 48 3.4 48 3.5 48 3.6

* Orifice numbers 43 are factory installed.

310AAV

43

To initiate the component test sequence, shut OFF the room thermostat or disconnect the "R"

thermostat lead. Briefly short the TEST/TWIN terminal to the "Com 24V" terminal. Status LED

will flash code and then turn ON the inducer motor. The inducer motor will run for the entire

component test. The hot surface ignitor, blower motor fan speed (on AMBER LED boards

only) blower motor-heat speed, and blower motor-cool speed will be turned ON for 10-15

seconds each. Gas Valve and Humidifier will not be turned on.

CONTINUOUS OFF - Check for 115VAC at L1 and L2, and 24VAC at SEC-1 and SEC-2.

CONTINUOUS ON - Control has 24VAC power.

RAPID FLASHING - Line voltage (115VAC) polarity reversed. If twinned, refer to twinning kit instructions.

LED CODE STATUS

11 NO PREVIOUS CODE - Stored status code is erased automatically after 72 hours. On

RED LED boards stored status codes can also be erased when power

(115 VAC or 24 VAC) to control is interrupted.

12 BLOWER ON AFTER POWER UP (115 VAC or 24 VAC) -Blower runs for 90 seconds,

if unit is powered up during a call for heat (R-W closed) or R-W opens during blower

on-delay.

13 LIMIT CIRCUIT LOCKOUT - Lockout occurs if the limit, draft safeguard, flame rollout, or

blocked vent switch (if used) is open longer than 3 minutes.

- Control will auto reset after three hours. - Refer to #33.

14 IGNITION LOCKOUT - Control will auto-reset after three hours. Refer to #34.

21 GAS HEATING LOCKOUT - Control will NOT auto reset.

Check for: - Mis-wired gas valve -Defective control (valve relay)

22 ABNORMAL FLAME-PROVING SIGNAL - Flame is proved while gas valve is de-

energized. Inducer will run until fault is cleared. Check for: - Leaky gas valve

- Stuck-open gas valve

23 PRESSURE SWITCH DID NOT OPEN Check for:

- Obstructed pressure tubing. - Pressure switch stuck closed.

24 SECONDARY VOLTAGE FUSE IS OPEN Check for:

- Short circuit in secondary voltage (24VAC) wiring.

If status code recall is needed, briefly remove then reconnect one main limit wire to display stored status code. On RED LED boards do not remove power or blower door before initiating status code recall. After

status code recall is completed component test will occur.

327596-101 REV. B

31 PRESSURE SWITCH DID NOT CLOSE OR REOPENED - If open longer than five minutes,

inducer shuts off for 15 minutes before retry. Check for: - Excessive wind

- Proper vent sizing - Defective inducer motor

- Low inducer voltage (115VAC) - Defective pressure switch

- Inadequate combustion air supply - Disconnected or obstructed pressure tubing

- Low inlet gas pressure (if LGPS used) - Restricted vent

If it opens during blower on-delay period, blower will come on for the selected blower

off-delay.

33 LIMIT CIRCUIT FAULT - Indicates a limit, draft safeguard, flame rollout, or blocked vent

switch (if used) is open. Blower will run for 4 minutes or until open switch remakes

whichever is longer. If open longer than 3 minutes, code changes to lockout #13.

If open less than 3 minutes status code #33 continues to flash until blower shuts off.

Flame rollout switch and BVSS require manual reset. Check for: - Restricted vent

- Proper vent sizing - Loose blower wheel. - Excessive wind

- Dirty filter or restricted duct system.

- Defective blower motor or capacitor. - Defective switch or connections.

- Inadequate combustion air supply (Flame Roll-out Switch open).

34 IGNITION PROVING FAILURE - Control will try three more times before lockout #14

occurs. If flame signal lost during blower on-delay period, blower will come on for the

selected blower off-delay. Check for: - Flame sensor must not be grounded

- Oxide buildup on flame sensor (clean with fine steel wool).

- Proper flame sense microamps (.5 microamps D.C. min., 4.0 - 6.0 nominal).

- Gas valve defective or gas valve turned off - Manual valve shut-off

- Defective Hot Surface Ignitor - Control ground continuity

- Low inlet gas pressure - Inadequate flame carryover or rough ignition

- Green/Yellow wire MUST be connected to furnace sheet metal

45 CONTROL CIRCUITRY LOCKOUT Auto-reset after one hour lockout due to;

- Gas valve relay stuck open - Flame sense circuit failure - Software check error

Reset power to clear lockout. Replace control if status code repeats.

SERVICE

COMPONENT TEST

EACH OF THE FOLLOWING STATUS CODES IS A TWO DIGIT NUMBER WITH THE FIRST DIGIT DETERMINED BY THE NUMBER OF SHORT FLASHES AND THE SECOND DIGIT BY THE NUMBER OF LONG FLASHES.

A04223

Fig. 45 --- Service Label

SERVICE AND MAINTENANCE

PROCEDURES

FIRE, EXPLOSION, ELECTRICAL SHOCK

HAZARD

Failure to follow this warning could result in personal

injury, death and/or property damage.

The ability to properly perform maintenance on this

equipment requires certain knowledge, mechanical

skills, tools, and equipment. If you do not possess these,

do not attempt to perform any maintenance on this

equipment other than those procedures recommended in

the User’s Manual.

!WARNING

ELECTRICAL SHOCK, FIRE OR EXPLOSION

HAZARD

Failure to follow this warning could result in personal

injury or death, or property damage.

Before servicing, disconnect all electrical power and install

lockout tag to furnace. Verify proper operation after

servicing.

!WARNING

ELECTRICAL OPERATION HAZARD

Failure to follow this caution may result in improper

furnace operation.

Label all wires prior to disconnection when servicing

controls. Wiring errors can cause improper and dangerous

operation.

CAUTION

!

ENVIRONMENTAL HAZARD

Failure to follow this caution may result in environmental

pollution.

Remove and recycle all components or materials (i.e. oil,

refrigerant, et.) before unit final disposal.

CAUTION

!

Step 1 —Introduction

GENERAL

These instructions are written as if the furnace is installed in an

upflow application. An upflow furnace application is where the

blower is located below the combustion and controls section of

the furnace, and conditioned air is discharged upward. Since this

furnace can be installed in any of the 4 positions shown in Fig. 4,

you must revise your orientation to component location

accordingly.

ELECTRICAL CONTROLS AND WIRING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal

injury or death.

Before installing, modifying, or servicing system, main

electrical disconnect switch must be in the OFF position and

install a lockout tag. There may be more than one electrical

supply to the furnace. Check accessories and cooling unit

for additional electrical supplies that must be shut off during

furnace servicing. Lockout and tag switch with a suitable

warning label. Verify proper operation after servicing.

!WARNING

The electrical ground and polarity for 115--v wiring must be

properly maintained. Refer to Fig. 26 for field wiring information

and to Fig. 41 for furnace wiring information.

NOTE: If the polarity is not correct, the STATUS LED on the

control will flash rapidly and prevent the furnace from heating.

310AAV

44

The control system also requires an earth ground for proper

operation of the control and flame--sensing electrode.

The 24--v circuit contains an automotive--type, 3--amp. fuse

located on the control. (See Fig. 25.) Any shorts of the 24--v

wiring during installation, service, or maintenance will cause this

fuse to blow. If fuse replacement is required, use ONLY a 3--amp.

fuse. The control LED will display status code 24 when fuse

needs to be replaced.

Proper instrumentation is required to service electrical controls.

The control in this furnace is equipped with a Status Code LED

(Light--Emitting Diode) to aid in installation, servicing, and

troubleshooting. It can be viewed through the sight glass in

blower access door. The furnace control LED is either ON

continuously, rapid flashing, or a code composed of 2 digits. The

first digit is the number of short flashes, the second digit is the

number of long flashes.

For an explanation of status codes, refer to service label located

on blower access door or Fig. 45 and the troubleshooting guide

which can be obtained from your distributor. The furnace control

will store 1 status code for 72 hrs.

See Fig. 49, a brief Troubleshooting Guide.

1. To retrieve status code, proceed with the following:

NOTE: NO thermostat signal may be present at control, and all

blower--OFF delays must be completed.

a. Leave 115--v power to furnace turned on.

b. Remove outer access door.

c. Look into blower access door sight glass for current

LED status.

d. BRIEFLY remove insulated terminal wire from the

draft safeguard (DSS) switch until LED goes out (1 to

2 sec), then reconnect it.

2. When above items have been completed, the LED flashes

status code 4 times. Record this status code for further

troubleshooting.

3. Component self--test will begin. Refer to component

TEST section for complete test sequence.

4. Check LED status.

5. Refer to SERVICE label on front of the blower access

door for more information.

6. Check LED status. If no previous faults in history, control

will flash status code 11.

7. If LED status indicates proper operation, RELEASE

BLOWER ACCESS DOOR SWITCH, reattach wire to R

terminal on furnace control board, replace blower access

door, and replace burner access door.

Step 2 —Care and Maintenance

FIRE OR EXPLOSION HAZARD

Failure to follow this warning could result in personal

injury, death and/or property damage.

Never store anything on, near, or in contact with the

furnace, such as:

1. Spray or aerosol cans, rags, brooms, dust mops, vacuum

cleaners, or other cleaning tools.

2. Soap powders, bleaches, waxes or other cleaning

compounds, plastic or plastic containers, gasoline, kerosene,

cigarette lighter fluid, dry cleaning fluids, or other volatile

fluids.

3. Paint thinners and other painting compounds, paper bags,

or other paper products.

!WARNING

For continuing high performance and to minimize possible

equipment failure, periodic maintenance must be performed on

this equipment. Consult your local dealer about proper frequency

of maintenance and the availability of a maintenance contract.

ELECTRICAL SHOCK AND FIRE HAZARD

Failure to follow this warning could result in personal

injury, death or property damage.

Turn off the gas and electrical supplies to the unit and install

lockout tag before performing any maintenance or service.

Follow the operating instructions on the label attached to

the furnace.

!WARNING

CARBON MONOXIDE POISONING AND FIRE

HAZARD

Failure to follow this warning could result in personal

injury, death and/or property damage.

Never operate unit without a filter or with filter access door

removed.

!WARNING

CUT HAZARD

Failure to follow this caution may result in personal injury.

Sheet metal parts may have sharp edges or burrs. Use care

and wear appropriate protective clothing, safety glasses and

gloves when handling parts and servicing furnaces.

CAUTION

!

The minimum maintenance on this furnace is as follows:

1. Check and clean air filter each month or more frequently if

required. Replace if torn.

2. Check blower motor and wheel for cleanliness each heating

and cooling season. Clean as necessary.

3. Check electrical connections for tightness and controls for

proper operation each heating season. Service as necessary.

4. Inspect burner compartment before each heating season for

rust, corrosion, soot or excessive dust. If necessary, have furnace

and burner serviced by a qualified service agency.

5. Inspect the vent pipe/vent system before each heating season

for rust, corrosion, water leakage, sagging pipes or broken

fittings. Have vent pipes/vent system serviced by a qualified

service agency.

6. Inspect any accessories attached to the furnace such as a

humidifier or electronic air cleaner. Perform any service or

maintenance to the accessories as recommended in the accessory

instructions.

CLEANING AND/OR REPLACING AIR FILTER

The air filter arrangement will vary depending on the application.

The filter is exterior to the furnace casing.

NOTE: If the filter has an airflow direction arrow, the arrow

must point towards the blower.

310AAV

45

CUT HAZARD

Failure to follow this caution may result in personal injury.

Sheet metal parts may have sharp edges or burrs. Use care

and wear appropriate protective clothing, safety glasses and

gloves when handling parts and servicing furnaces.

CAUTION

!

Media cabinet filter procedures:

NOTE: Media cabinet or 3/4--in. (19 mm) filter rack are

accessories and are not included from the factory.

1. Turn off electrical supply to furnace before removing filter

access door.

2. Remove filter cabinet door.

3. Slide filter out of cabinet.

4. If equipped with permanent, washable 3/4--in. (19 mm) filter,

clean filter by spraying cold tap water through filter in opposite

direction of airflow. Rinse filter and let dry. Oiling or coating of

the filter is not recommended. See Table 14 for size information.

5. If equipped with factory--specified disposable media filter,

replace only with media filter having the same part number and

size. For expandable replacement media, refer to the instructions

included with the replacement media.

6. Slide filter into cabinet.

7. Replace filter cabinet door.

8. Turn on electrical supply to furnace.

BLOWER MOTOR AND WHEEL

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.

Blower access door switch opens 115--v power to control. No

component operation can occur unless switch is closed.

Caution must be taken when manually closing this switch for

service purposes.

!WARNING

NOTE: The blower wheel should not be dropped or bent as

balance will be affected.

The following steps should be performed by a qualified

service agency.

To ensure long life and high efficiency, clean accumulated dirt

and grease from blower wheel and motor annually.

The inducer and blower motors are pre--lubricated and require no

additional lubrication. These motors can be identified by the

absence of oil ports on each end of the motor.

Clean blower motor and wheel as follows:

1. Turn off electrical supply to furnace.

2. Remove outer door.

3. For downflow or horizontal furnaces having vent pipes

within the furnace that pass in front of the blower access

door:

a. Disconnect vent connector from furnace vent elbow.

b. Disconnect and remove short piece of vent pipe from

within furnace.

4. Remove 2 screws from blower access door and remove

blower access door.

5. All factory wires can be left connected, but field thermo-

stat connections may need to be disconnected depending

on their length and routing.

6. Remove 2 screws holding blower assembly to blower

deck and slide blower assembly out of furnace.

7. Clean blower wheel and motor using a vacuum with soft

brush attachment. Blower wheel blades may be cleaned

with a small paint or flux brush. Do not remove or disturb

balance weights (clips) on blower wheel blades.

8. Vacuum any loose dust from blower housing, wheel and

motor.

9. If a greasy residue is present on blower wheel, remove

wheel from the blower housing and wash it with an appro-

priate degreaser. To remove wheel:

NOTE: Before disassembly, mark blower motor, and blower

housing so motor and each arm is positioned at the same location

during reassembly.

a. Disconnect capacitor wires and ground wire attached

to blower housing.

b. Remove screws securing cutoff plate and remove

cutoff plate from housing.

c. Loosen set screw holding blower wheel on motor shaft

(160+/--20 in.--lb. when reassembling).

d. Remove bolts holding motor to blower housing and

slide motor out of wheel (40+/--10 in.--lb. when reas-

sembling).

e. Remove blower wheel from housing.

f. Clean wheel and housing.

10. Reassemble motor and blower by reversing steps 9f

through 9a, finishing with 9a. Be sure to reattach ground

wire to the blower housing.

11. Verify that blower wheel is centered in blower housing

and set screw contacts the flat portion of the motor shaft.

Loosen set screw on blower wheel and reposition if neces-

sary.

12. Spin the blower wheel by hand to verify that the wheel

does not rub on the housing.

13. Reinstall blower assembly in furnace.

UNIT DAMAGE HAZARD

Failure to follow this caution may result in shortened heat

exchanger life.

Heating fan speed(s) MUST be adjusted to provide proper

air temperature rise as specified on the rating plate.

Recommended operation is at the midpoint of the rise range

or slightly above. Refer to SET TEMPERATURE RISE

under START--UP, ADJUSTMENT, and SAFETY

CHECK.

CAUTION

!

14. Connect thermostat leads if previously disconnected.

15. To check blower for proper rotation:

a. Turn on electrical supply.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal

injury, or death.

Blower access door switch opens 115--v power to furnace

control. No component operation can occur unless switch is

closed. Exercise caution to avoid electrical shock from

exposed electrical components when manually closing this

switch for service purposes.

!WARNING

b. Manually close blower access door switch.

310AAV

46

NOTE: If thermostat terminals are jumpered at the time blower

access door switch is closed, blower will run for 90 sec before

beginning a heating or cooling cycle.

c. Perform component self--test as shown at the bottom

of the SERVICE label, located on the front of blower

access door.

d. Verify blower is rotating in the correct direction

16. If furnace is operating properly, RELEASE BLOWER

ACCESS DOOR SWITCH. Remove any jumpers or re-

connect any disconnected thermostat leads. Replace

blower access door.

17. Downflow or horizontal furnaces with vent pipe through

furnace only:

a. Install and connect short piece of vent pipe inside fur-

nace to existing vent.

b. Connect vent connector to vent elbow.

18. Reinstall casing door.

19. Turn on gas supply and cycle furnace through one com-

plete heating and cooling cycle. Verify the furnace temper-

ature rise as shown in Adjustments Section. Adjust tem-

perature rise as shown in Adjustments Section. If outdoor

temperature is below 70_F, (21_C) turn off circuit breaker

to outdoor unit before running furnace in the cooling

cycle. Turn outdoor circuit breaker on after completing

cooling cycle.

CLEANING HEAT EXCHANGER

The following steps should be performed by a qualified

service agency:

NOTE: If the heat exchangers get a heavy accumulation of soot

and carbon, they should be replaced rather than trying to clean

them thoroughly. A heavy build--up of soot and carbon indicates

that a problem exists which needs to be corrected, such as

improper adjustment of manifold pressure, insufficient or poor

quality combustion air, incorrect size or damaged manifold

orifice( s), improper gas, or a restricted heat exchanger. Action

must be taken to correct the problem.

If it becomes necessary to clean the heat exchangers because of

dust or corrosion, proceed as follows:

1. Turn OFF gas and electrical power to furnace.

2. Remove outer access door.

3. Disconnect vent connector from furnace vent elbow.

4. For downflow or horizontal furnace having an internal

vent pipe, remove internal vent pipe within the casing.

5. Disconnect wires to the following components. Mark

wires to aid in reconnection of (be careful when discon-

necting wires from switches because damage may occur):

a. Draft safeguard switch.

b. Inducer motor.

c. Pressure switch(es).

d. Limit overtemperature switch.

e. Gas valve.

f. Hot surface igniter.

g. Flame--sensing electrode.

h. Flame rollout switches.

i. Remove NOx baffles on low NOx models.

6. Remove screws that fasten the collector box assembly to

the cell panel. Be careful not to damage the collector box.

Inducer assembly and elbow need not be removed from

collector box.

7. Disconnect gas line from gas manifold.

8. Remove the 5 screws that attach the burner assembly to

the cell panel. The gas valve and individual burners need

not be removed from support assembly.

NOTE: Be very careful when removing burner assembly to

avoid breaking igniter. See Fig. 46 and 47 for correct igniter

location.

9. Using field--provided 25--caliber rifle cleaning brush,

36--in. (914 mm) long, 1/4 in. (6 mm) diameter steel

spring cable, a variable speed, reversible electric drill, and

vacuum cleaner, clean cells as follows:

a. Remove metal screw fitting from wire brush to allow

insertion into cable.

b. Insert the twisted wire end of brush into end of spring

cable, and crimp tight with crimping tool or crimp by

striking with ball--peen hammer. TIGHTNESS IS

VERY IMPORTANT.

NOTE: The materials needed in item 9 can usually be purchased

at local hardware stores.

(1) Attach variable--speed, reversible drill to the end of spring

cable (end opposite brush).

(2) Insert brush end of cable into the outlet opening of cell and

slowly rotate with drill. DO NOT force cable. Gradually insert

cable into upper pass of cell. (See Fig. 48.)

(3) Work cable in and out of cell 3 or 4 times to obtain sufficient

cleaning. DO NOT pull cable with great force. Reverse drill and

gradually work cable out.

A05025

Fig. 46 --- Igniter Position--Side View

310AAV

47

1-7/8

(47.6 mm)

A05026

Fig. 47 --- Igniter Position--Top View

A01050

Fig. 48 --- Cleaning Heat Exchanger Cell

(4) Insert brush end of cable in burner inlet opening of cell, and

proceed to clean 2 lower passes of cell in same manner as upper

pass.

(5) Repeat foregoing procedures until each cell in furnace has

been cleaned.

(6) Using vacuum cleaner, remove residue from each cell.

(7) Using vacuum cleaner with soft brush attachment, clean

burner assembly.

(8) Clean flame sensor with fine steel wool.

(9) Install NOx baffles (if removed).

(10) Reinstall burner assembly. Center burners in cell openings.

10. Remove old sealant from cell panel and collector box

flange.

11. Spray releasing agent on the heat exchanger cell panel

where collector box assembly contacts cell panel.

NOTE: A releasing agent such as cooking spray or equivalent

(must not contain corn or canola oil, aromatic or halogenated

hydrocarbons or inadequate seal may occur) and RTV sealant

(G.E. 162, 6702, or Dow--Corning 738) are needed before

starting installation. DO NOT substitute any other type of RTV

sealant. G.E. 162 (P771--9003) is available through RCD in 3--oz

tubes.

12. Apply new sealant to flange of collector box and attach to

cell panel using existing screws, making sure all screws

are secure.

13. Reconnect wires to the following components. (Use con-

nection diagram on wiring label, if wires were not marked

for reconnection locations.):

a. Draft safeguard switch.

b. Inducer motor.

c. Pressure switch(es).

d. Limit over--temperature switch.

e. Gas valve.

f. Hot surface igniter.

g. Flame--sensing electrode.

h. Flame rollout switches.

i. Install NOx baffles (if removed).

14. Reinstall internal vent pipe, if applicable.

15. Reinstall vent connector on furnace vent elbow. Securely

fasten vent connector to vent elbow with 2 field--supplied,

corrosion--resistant, sheet metal screws located 180_apart.

16. Replace blower access door only, if it was removed.

17. Set thermostat above room temperature and check furnace

for proper operation.

18. Verify blower airflow and speed changes between heating

and cooling.

FIRE OR EXPLOSION HAZARD

Failure to follow this warning could result in personal

injury, death and/or property damage.

Never test for gas leaks with an open flame. Use a

commercially available soap solution made specifically for

the detection of leaks to check all connections.

!WARNING

19. Check for gas leaks.

20. Replace outer access door.

Step 3 —Sequence of Operation

NOTE: Furnace control must be grounded for proper operation

or control will lock out. Control is grounded through

green/yellow wire routed to gas valve and manifold bracket

screw.

Using the schematic diagram in Fig. 41, follow the sequence of

operation through the different modes. Read and follow the

wiring diagram very carefully.

NOTE: If a power interruption occurs during a call for heat (W),

the control will start a 90--sec blower--only ON period two

seconds after power is restored, if the thermostat is still calling for

gas heating. The amber LED light will flash code 12 during the

90--sec period, after which the LED will be ON continuous, as

long as no faults are detected. After the 90--sec period, the furnace

will respond to the thermostat normally.

The blower door must be installed for power to be conducted

through the blower door interlock switch ILK to the furnace

control CPU, transformer TRAN, inducer motor IDM, blower

motor BLWM, hot--surface igniter HSI, and gas valve GV.

1. Heating

(See Fig. 26 for thermostat connections.) The wall thermo-

stat “calls for heat,” closing the R--to--W circuit. The fur-

nace control performs a self--check, verifies the pressure

switch contacts PRS are open, and starts the inducer motor

IDM.

a. Inducer Prepurge Period-- As the inducer motor

IDM comes up to speed, the pressure switch contacts

PRS close, 24 VAC power is supplied for a field in-

stalled humidifier at the HUM terminal and the control

begins a 15--sec prepurge period.

b. Igniter Warm--Up-- At the end of the prepurge period,

the Hot--Surface igniter HSI is energized for a

17--second igniter warm--up period.

c. Trial--for--Ignition Sequence-- When the igniter

warm--up period is completed, the main gas valve re-

lay contacts GVR close to energize the gas valve GV,

the gas valve opens, The gas valve GV permits gas

flow to the burners where it is ignited by the HSI. Five

seconds after the GVR closes, a 2--second flame prov-

ing period begins. The HSI igniter will remain ener-

gized until the flame is sensed or until the 2--second

flame proving period begins.

310AAV

48

d. Flame--Proving-- When the burner flame is proved at

the flame--proving sensor electrode FSE, the furnace

control CPU begins the blower--ON delay period and

continues to hold the gas valve GV open. If the burner

flame is not proved within two seconds, the control

CPU will close the gas valve GV, and the control CPU

will repeat the ignition sequence for up to three more

Trials--For--Ignition before going to Ignition--Lockout.

Lockout will be reset automatically after three hours

or by momentarily interrupting 115 vac power to the

furnace, or by interrupting 24 vac power at SEC1 or

SEC2 to the furnace control CPU (not at W, G, R, etc.)

If flame is proved when flame should not be present,

the furnace control CPU will lock out of Gas--Heating

mode and operate the inducer motor IDM until flame

is no longer proved.

e. Blower--On Delay-- If the burner flame is proven, the

blower motor is energized on HEAT speed 25 sec after

the gas valve GV is energized.

Simultaneously, the electronic air cleaner terminal

EAC--1 is energized and remains energized as long as

the blower motor BLWM is energized.

f. Blower--Off Delay-- When the thermostat is satisfied,

the R--to--W circuit is opened, de--energizing the gas

valve GV, stopping gas flow to the burners, and de--

energizing the humidifier terminal HUM. The inducer

motor IDM will remain energized for a 5--second

post--purge period. The blower motor BLWM and air

cleaner terminal EAC--1 will remain energized for 90,

120, 150, or 180 seconds (depending on the blower--

OFF delay selection). The furnace control CPU is fact-

ory--set for a 120--second blower--OFF delay.

2. Cooling Mode

(See Fig. 26 for thermostat connections.) The thermostat

closes the R--to--G--and--Y circuits. The R--to--Y circuit

starts the outdoor unit, and the R--to--G and Y circuits start

the furnace blower motor BLWM on COOL speed. The

electronic air cleaner terminal EAC--1 is energized with

115 vac when the blower motor BLWM is operating.

When the thermostat is satisfied, the R--to--G--and--Y cir-

cuits are opened. The outdoor unit will stop, and the fur-

nace blower motor BLWM will continue operating on the

COOL speed for an additional 90 sec. Cut jumper J2 to

reduce the cooling off--delay to 5 sec. (See Fig. 25.)

3. Continuous Blower Mode

When the R--to--G circuit is closed by the thermostat, the

blower motor BLWM will operate on continuous--blower

speed (same as HEAT speed). Terminal EAC--1 is ener-

gized as long as the blower motor BLWM is energized.

During a call for heat, the blower BLWM will stop during

igniter warm--up (17 sec), ignition, and blower--ON delay

(25 sec), allowing the furnace heat exchangers to heat up

more quickly, then restarts at the end of the blower--ON

delay period at HEAT speed.

When the thermostat “calls for cooling”, the blower motor

BLWM will operate at COOL speed. When the thermostat

is satisfied, the blower motor BLWM will operate an addi-

tional 90 sec, on COOL speed before reverting back to

continuous blower speed.

When the R--to--G circuit is opened, the blower motor

BLWM will continue operating for an additional 5 sec, if

no other function requires blower motor BLWM opera-

tion.

4. Heat Pump

When installed with a heat pump, the furnace control auto-

matically changes the timing sequence to avoid long

blower off times during demand defrost cycles. When the

R--to--Wand-- Y or R--to--W--and--Y--and--G circuits are

energized the furnace control CPU will continue to turn on

the blower motor BLWM at HEAT speed, and begin a

heating cycle. The blower motor BLWM will remain on

until the end of the prepurge period, then shut off for 24

sec then come back on at HEAT speed. When the W input

signal disappears, the furnace control begins a normal in-

ducer post--purge period and the blower switches to

COOL speed after a 3 sec delay. If the R--to--W--and--

Y--and--G signals disappear at the same time, the blower

motor BLWM will remain on for the selected blower--

OFF delay period. If the R--to--W--and--Y signals disap-

pear, leaving the G signal, the blower motor BLWM will

continue running the blower motor at HEAT speed after

the selected blower--OFF delay period is completed.

Step 4 —Wiring Diagrams

Refer to Fig. 25 and 41 for wiring diagrams.

Step 5 —Troubleshooting

Refer to the service label. (See Fig. 45–Service Label.)

The Troubleshooting Guide can be a useful tool in isolating

furnace operation problems. Beginning with the word Start,

answer each question and follow the appropriate arrow to the next

item.

The Guide will help to identify the problem or failed component.

After replacing any component, verify correct operation

sequence.

310AAV

49

Is LED status light on?

Is LED status light blinking rapidly without a

pause?

Is LED status light blinking ON/OFF slowly

with a combination of short and long flashes?

Determine status code. The status code is a

2 digit number with the first digit determined

by the number of short flashes and the second

digit by the number of long flashes?

Go to section below for the status code that

was flashed.

Is there 115V at L1 and L2?

Is there 24V at SEC-1 and SEC-2?

Replace furnace control.

Check for correct line voltage polarity. If units

are twinned, check for proper low-voltage

(24V) transformer phasing.

To recall status code briefly remove and reconnect one RED wire from the draft

safeguard switch to display stored status code. On RED LED control do not

remove power or blower access panel before initiating status code recall. You

can also recall the previous status code by momentarily shorting the TEST/TWIN

terminal to Com24V terminal until the LED goes out. LED will flash the status

code of the previous fault or status code #11 (1 short and 1 long flash) if there

was no previous fault. After the control repeats the code 4 times, the control

will go through a brief component test sequence. The inducer will start and run

for the entire component test. The HSI, blower motor FAN speed (AMBER LED

boards only) HEAT speed, and COOL speed will run for 10 – 15 seconds each.

Gas valve and humidifier will not be turned on.

Was there a previous status code

other than #11?

Is door switch closed?

Is there 115V going to switch?

Replace door switch.

Replace transformer.

Does the control respond to W, Y1 (if present),

Y/Y2, and G (24V) thermostat signals?

Run system through a heating or cooling cycle

to check operation. Status codes are erased

after 72 hours. On RED LED boards stored

status codes can also be erased whenever

(115V or 24V) is interrupted.

Replace furnace control.

Is door switch closed?

Is circuit breaker closed?

Check for continuity in wire from circuit breaker

to furnace.

Close circuit breaker and go back to START.

Check room thermostat or

interconnecting cable.

Is 24V present at W, Y1 (if present), Y/Y2 or

G thermostat terminals on the furnace control?

Disconnect all the thermostat wires from the

furnace control.

Does the problem repeat when using

a jumper wire?

The thermostat is not compatible with the

furnace control. Either install a ballast resistor,

connect the Com24V thermostat terminal to

the thermostat, or replace the thermostat.

NO

YES

YES

NO

NO

YES

YES

YES

YES

NO

YES

YES

NO

YES

NO

YES

NO

NO

NO

YES

NO

YES

NO

START

NO

A02106a

Fig. 49 --- Troubleshooting Guide

310AAV

50

11 NO PREVIOUS CODE – Stored codes

are erased after 72 hours. On RED LED

boards stored status codes can also be

erased whenever power (115V or 24V)

is interrupted. Run system through a

heating or cooling cycle to check system.

12 BLOWER ON AFTER POWER UP –

(115V OR 24V) – Normal operation.

Blower runs for 90 seconds, if unit is

powered up during a call for heat (R-W

closed) or when (R-W opens) during the

blower on-delay period.

13 LIMIT CIRCUIT LOCKOUT – Lockout

occurs if the limit, draft safeguard, flame

rollout, or blocked vent switch*(if used) is

open longer than 3 minutes. Control will

auto-reset after 3 hours. See code 33.

14 IGNITION LOCKOUT – System failed to

ignite gas and prove flame in 4 attempts.

Control will auto-reset after 3 hours.

See status code 34.

21 GAS HEATING LOCKOUT – Turn off

power and wait 5 minutes to retry.

Check for:

- Stuck closed gas valve relay on control.

- Miswire or short to gas valve wire.

22 ABNORMAL FLAME-PROVING SIGNAL

Flame is proved while gas valve is de-

energized. Inducer will run until fault is

cleared. Check for:

- Stuck open or leaky gas valve.

23 PRESSURE SWITCH DID NOT OPEN

Check for:

- Obstructed pressure tube.

- Pressure switch stuck closed.

24 SECONDARY VOLTAGE FUSE IS OPEN

Check for:

- Short circuit in secondary voltage (24V)

wiring including thermostat leads.

Disconnect thermostat leads to isolate

short circuit.

31 PRESSURE SWITCH DID NOT CLOSE

OR REOPENED – If open longer than 5

minutes, inducer shuts off for 15 minutes

before retry. If opens during blower on-

delay period, blower will come on for the

selected blower off-delay. Check for:

- Proper vent sizing.

- Low inducer voltage (115V).

- Low inlet gas pressure (if LGPS used).

- Inadequate combustion air supply.

- Disconnected or obstructed pressure

tubing.

- Defective inducer motor.

-Defective pressure switch.

- Excessive wind.

- Restricted vent.

33 LIMIT CIRCUIT FAULT – Indicates the

limit, draft safeguard, flame rollout, or

blocked vent switch* (if used) is open.

Blower will run for 4 minutes or until open

switch remakes whichever is longer. If

open longer than 3 minutes, code

changes to lockout #13. If open less

than 3 min. status code #33 continues

to flash until blower shuts off. Flame

rollout switch and BVSS requires manual

reset. Check for:

- Dirty filter or restricted duct system.

- Loose blower wheel.

-D

efective switch or connections.

- Defective blower motor or capacitor.

- Inadequate combustion air supply

(flame rollout switch open).

- Restricted vent.

-P

roper vent sizing.

- Excessive wind.

34 IGNITION PROVING FAILURE – If flame

is not sensed during the trial for ignition

period, the control will repeat the ignition

sequence 3 more times before lockout

#14 occurs. If flame signal is lost during

the blower on-delay period, blower will

come on for the selected blower off-delay.

Check the following items first before

proceeding to the next step.

- Gas valve turned off.

- Manual shut-off valve.

-Green/Yellow wire MUST be connected

to furnace sheet metal.

- Flame sensor must not be grounded.

To determine whether the problem is in

the gas valve, igniter, or flame sensor the

system can be operated in the component

test mode to check the igniter. First

remove the R thermostat connection from

the control and initiate the component

test sequence. Does the igniter glow

orange/white by the end of the 15 second

warm-up period?

Unplug igniter harness from control and initiate

another component test sequence. Check

for 115V between pin 1 and NEUTRAL-L2 on

the control. Was 115V present for the 15

second period?

Reconnect the R thermostat lead and set

thermostat to call for heat. Connect voltmeter

across gas valve connections. Does gas valve

receive 24V?

Does gas valve open and allow gas to flow?

Do the main burners ignite?

Do the main burners stay on?

Repeat call for heat and check flame sensor

current during trial for ignition period. Is the

DC microamps below 0.5?

Is current near typical value?

Will main burners ignite and stay on?

Fixed.

Clean flame sensor with fine steel wool and

recheck current. Nominal current is 4.0 to 6.0

microamps.

45 CONTROL CIRCUITRY LOCKOUT

Auto-reset after 1 hour lockout due to:

- Flame circuit failure.

- Gas valve relay stuck open.

- Software check error.

Reset power to clear lockout. Replace

control if code repeats.

Replace furnace control.

Check for continuity in the harness and igniter.

Replace defective component.

Check connections. If OK, replace control.

Check that all gas valves are turned on.

Replace valve.

Check for:

-Inadequate flame carryover or rough

ignition.

-Low

inlet gas pressure.

- Proper firing rate.

- Blocked or incorrect carry- over gap.

(.045” nominal)

Allow blower to come on and repeat test to

check for intermittent operation.

Check connections and retry. If current is

near typical value (4.0-6.0 nominal) and

burners will not stay on, replace control.

Replace electrode.

Replace furnace control.

* Blocked vent switch used in Chimney Adapter Kit

YES

YES

YES

YES

NO

YES

YES

YES

NO

YES

NO

NO

NO

YES

NO

NO

NO

NO

310AAV

51

Table 17—Accessory List

DESCRIPTION PART NUMBER NOTES

Media Filter Cabinet

FILCABXX0016 Filter cabinet 16” (406 mm) for 4” (102 mm) wide filter

FILCABXX0020 Filter cabinet 20” (508 mm) for 4” (102 mm) wide filter

FILCABXX0024 Filter cabinet 24” (610 mm) for 4” (102 mm) wide filter

Cartridge Media Filter

FILXXCAR0016 Filter Cartridge replacements for FILCAB media cabinet

FILXXCAR0020 Filter Cartridge replacements for FILCAB media cabinet

FILXXCAR0024 Filter Cartridge replacements for FILCAB media cabinet

EZ Flex Media Filter with End Caps

EXPXXUNV0016 16” (406 mm) Replacement Expandable Filter assembly

EXPXXUNV0020 20” (508 mm) Replacement Expandable Filter assembly

EXPXXUNV0024 24” (610 mm) Replacement Expandable Filter assembly

Replacement EZ Flex Filter Media

EXPXXFIL0016 16” (406 mm) Replacement filter for EXPUNV assembly

EXPXXFIL0020 20” (508 mm) Replacement filter for EXPUNV assembly

EXPXXFIL0024 24” (610 mm) Replacement filter for EXPUNV assembly

External Bottom Return Filter Rack

KGAFR0401B14 Bottom return filter rack 14” (356 mm) casing

KGAFR0501B17 Bottom return filter rack 17” (432 mm) casing

KGAFR0601B21 Bottom return filter rack 21” (533 mm) casing

KGAFR0701B24 Bottom return filter rack 24” (610 mm) casing

External Side Return Filter Rack KGAFR0801SRE E x t . S i d e f i l t e r r a c k --- a l l c a s i n g s --- i n c l u d e s f i l t e r

Unframed Filter 3/4--- in. (19 mm)

KGAWF1301UFR† (1) unframed filter 16x25x3/4 (406x635x19 mm)

KGAWF1401UFR (1) unframed filter 20x25x3/4 (508x635x19 mm)

KGAWF1501UFR (1) unframed filter 24x25x3/4 (610x635x19 mm)

KGAWF1306UFR† (6) unframed filter 16x25x3/4 (406x635x19 mm)

KGAWF1406UFR (6) unframed filter 20x25x3/4 (508x635x19 mm)

KGAWF1506UFR (6) unframed filter 24x25x3/4 (610x635x19 mm)

Flue Extension KGAFE0112UPH (12) vent extension 4” (102 mm) dia. x 3--- 1/2” (89 mm)

*Twinning Kit KGATW0601HSI Single or two stage PSC equipped units only

Combustible Floor Base KGASB0201ALL Adjustable floor base --- fits all casing sizes

Downflow Vent Guard KGBVG0101DFG Vent flue shield --- downflow venting outside casing

Vent Extension Kit KGAVE0101DNH Downflow, through casing vent extension

Chimney Adapter Kit KGACA02014FC Masonry chimney adapter 4” (102 mm)

KGACA02015FC Masonry chimney adapter 5” (127 mm)

N a t u r a l --- t o --- P r o p a n e C o n v e r s i o n K i t KGANP4601ALL Gas conversion natural to propane all

P r o p a n e --- t o --- N a t u r a l C o n v e r s i o n K i t KGAPN3901ALL Gas conversion propane to natural all

Label Kit KGALB0101KIT Downflow orientation label replacement

**ECM Motor Simulator KGASD0301FMS ECM blower and inducer simulator --- variable speed units

**Advanced Product Monitor KGAFP0301APM PC software and hardware for Troubleshooting variable speed units

* Not for ECM or variable---speed ECM models

** Variable---speed ECM models only

310AAV

52

PARTS REPLACEMENT INFORMATION GUIDE

CASING GROUP

Outer door

Blower door

Top filler plate

Bottom filler plate

Bottom enclosure

ELECTRICAL GROUP

Control bracket

Junction box

Limit switch(es)

Circuit board

Door switch

Transformer

Wiring harness 115v

Wiring harness 24v

BLOWER GROUP

Blower housing

Blower cutoff

Blower motor

Blower wheel

Capacitor (where used)

Capacitor strap (where used)

Grommet

Power choke (where used)

GAS CONTROL GROUP

Manifold

Burner assembly

Orifice

Flame sensor

Hot surface igniter

Gas valve

Manual reset limit switches

Burner support assembly

HEAT EXCHANGER GROUP

Heat exchanger cell

Cell panel

Lox NOx baffle (California models only)

INDUCER GROUP

Housing assembly

Pressure switch

Inducer motor

Inducer wheel

Vent elbow assembly

Draft safeguard switch

TO OBTAIN INFORMATION ON PARTS: Consult your installing dealer or classified section of your local telephone directory under

“Heating Equipment” or “Air Conditioning Contractors and Systems” headings for dealer listing by brand name or contact:

BRYANT HEATING & COOLING SYSTEMS

Consumer Relations Department

P.O. Box 4952

Syracuse, New York 13221--4952

1--800--428--4326

Have available the model number, series number, and serial number located on the unit rating plate to ensure correct replacement part.

Example of Model Number

MODEL VOLTAGE IGNITION

TYPE

COOLING

SIZE

(AIRFLOW)

HEATING

SIZE VARIATION SERIES VARIATION

310A A V 066 135 A E JA

WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause personal injury, property damage, or death.

Consult a qualified installer, service agency, or your local gas supplier for information or assistance. The qualified installer or service agency

must use only factory--authorized replacement parts, kits, or accessories when modifying this product.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

EBryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231 Edition Date: 05/12

Replaces: II310A--- 45--- 13

Catalog No. II310

A

--- 4 5 --- 1 4

310AAV