ICP F8MXL0451408A1, F8MXL0701716A1, F8MXL0902116A1, F8MXL1102120A1, F8MXL1352420A1 Installation Guide

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These instructions must be read and understood completely before attempting installation.

Safety Labeling and Signal Words

DANGER, WARNING, CAUTION, and NOTE

The signal words DANGER, WARNING, CAUTION, and NOTE

are used to identify levels of hazard seriousness. The signal word

DANGER is only used on product labels to signify an immediate

hazard. The signal words WARNING, CAUTION, and NOTE will be used on product labels and throughout this manual and other manual that may apply to the product.

DANGER - Immediate hazards which will result in severe person- al injury or death.

WARNING - Hazards or unsafe practices which could result in severe personal injury or death.

CAUTION - Hazards or unsafe practices which may result in minor personal injury or product or property damage.

NOTE - Used to highlight suggestions which wilt result in en-

hanced installation, reliability, or operation.

TABLE OF CONTENTS

SAFETY CONSIDERATIONS ............................... 3

INTRODUCTION ......................................... 4

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

SAFETY ................................................. 4

GENERAL INSTALLATION ................................. 5

COMBUSTION AND VENTILATION AIR ..................... 5

DUCT SYSTEMS ......................................... 5

ACOUSTICAL LINING AND FIBROUS GLASS DUCT .......... 5

GAS PIPING AND GAS PIPE PRESSURE TESTING .......... 5

ELECTRICAL CONNECTIONS ............................. 5

VENTING ............................................... 5

ELECTROSTATIC DISCHARGE (ESD)

PRECAUTIONS PROCEDURE ............................. 5

LOCATION .............................................. 6

AIR FOR COMBUSTION AND VENTILATION ................. 8

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

UPFLOW INSTALLATION ................................. 10

DOWNFLOW INSTALLATION ............................. 11

HORIZONTAL INSTALLATION ............................. 12

FILTER ARRANGEMENT ................................. 13

AIR DUCTS ............................................. 13

GAS PIPING ............................................ 16

ELECTRICAL CONNECTIONS ............................ 19

SERVICE AND MAINTENANCE PROCEDURES ............. 40

SEQUENCE OF OPERATION ............................. 44

WIRING DIAGRAM ...................................... 46

TROUBLESHOOTING GUIDE ............................. 47

Signal Words in Manuals

The signal word WARNING is used throughout this manual in the following manner:

The signal word CAUTION is used throughout this manual in the following manner:

Signal Words on Product Labeling

Signal words are used in combination with colors and/or pictures or product labels.

Safety-alert symbol

When you see this symbol on the unit and in instructions or manu- als, be alert to the potential for personal injury.

Use of the AHRI Certified TM Mark indic-

ates a manufacturer's participation in the

program. For verification of certification for individual products, go to www.ahridirect-

IS0 9001

PERSONAL INJURY, AND/OR PROPERTY DAMAGE HAZARD

Failure to carefully read and follow this warning could result in equipment malfunction, property damage,

3ersonal injury and/or death.

Installation or repairs made by unqualified persons could result in equipment malfunction, property damage, personal injury and/or death.

The information contained in this manual is intended for

use by a qualified service technician familiar with safety

3rocedures and equipped with proper tools and test

instruments.

Installation must conform with local building codes and with the Natural Fuel Gas Code (NFCG) NFPA 54/ANSI Z223.1

ory.org .

INSTALLER: Affixthese instructions on or adjacent tothe furnace. CONSUMER: Retain these instructions for future reference.

Portions of the text and tables are reprinted from NFPA 54/ANSI Z223.t -2012_c3, with permission of National Fire Protection Association, Quincy, MA 02269 and American Gas Association, Washing- ton, DC 20001. This reprinted material is not the complete and official position of the NFPA or ANSI, on the referenced subiect, which is represented only by the standard in its entirety.

Printedin U.S.A. 441 01 1411 05 12/5/2013

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Figure 1 - Dimensional Drawing

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21.6 6.1

BOT._M[s'la.5]

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BOTrOM RE11JRN [11kl]

WIDTH

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.

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Table 1 - Dimensions

FURNACE SIZE

0451408 0701716

0902116 1102120

1352420

* 135 size furnaces require a 5 in. or 6 in, (127 or 152 mm) vent, Use a ven

CABINET WIDTH

IN. (aM)

14-3/16 (360)

17-1/2 (445)

21 (533) 21 (533)

24-1/2 (622)

OUTLET WIDTH

IN. (aM)

12-9/16 (319)

15-7/8 (403) 19-3/8 (492)

19-3/8 (492) 22-7/8 (581)

TOP AND BOTTOM

: adapter between furnace a

2 specificationsaresubjecttochangewithout notice. 441 01 1411 05

FLUE COLLAR

IN. (aM)

9-5/16 (237)

11-9/16 (294)

13-5/16 (338) 13-5/16 (338)

15-1/16 (383)

BOTTOM WIDTH

IN. (aM)

12-11/16 (322)

16 (406)

19-1/2 (495) 19-1/2 (495)

23 (584)

qd vent stack.

CONNECTION

IN. (MM)

4 (102)*

L11/4

pE_]

VENT

SIZE*

(LB / KG)

4 (102) 4 (102) 4 (102)

4 (102)

SHIP WT

104 (47) 126 (57) 140 (64)

152 (69) 163 (74)

SAFETY CONSIDERATIONS

FIRE, EXPLOSION, ELECTRICAL SHOCK, AND

CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in dangerous

operation, serious injury, death, or property damage.

Improper installation, adjustment, alteration, service, maintenance, or use could 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.

FURNACE RELIABILITY HAZARD

Improper installation or misapplication of furnace may require excessive servicing or cause premature

component failure. 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 sizin,q.

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 /k. 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.

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 servicin,q furnaces.

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 specified 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. Connect this furnace to an approved vent system only,

as specified in the "Venting" section of these instruc- tions.

5. 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, as

specified in the "Gas Piping" section.

6. Always install furnace to operate within the furnace's intended temperature-rise range with a duct system

which has an external static pressure within the allow- able 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

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. See "Air Ducts" section.

8. A gas-fired furnace for installation in a residential gar- age 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 sec- tion of these instructions.

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 installation in alcoves, attics, basements,

closets, utility rooms, crawlspaces, and garages. The furnace is factory-shipped for use with natural gas. A

CSA listed accessory gas conversion kit is required to convert furnace for use with propane gas.

11. See Figure 2 for required clearances to combustible construction.

12. Maintain a 1-in. (25 mm) clearance from combustible materials to supply air ductwork for a distance of 36

inches (914 mm) horizontally from the furnace. See NFPA 90B or local code for further requirements.

13. These furnaces SHALL NOT be installed directly on carpeting, tile, or any other combustible material other

than wood flooring. In downflow installations, factory accessory floor base MUST be used when installed on

combustible materials and wood flooring. Special base is not required when this furnace is installed on manu- facturer's coil model numbers END4X, ENW4X or coil

casing model number NAEA. See Figure 2 for clear- ance to combustible construction information.

441 01 1411 05 Specificationsaresubjecttochangewithoutnotice. 3

INTRODUCTION

F8MXN, G8MXN, F8MXL, and G8MXL, 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

Figure 2 - Clearances to Combustibles

MINIMUMINCHESCLEARANCETOCOMBUSTIBLECONSTRUCTION

This forced air furnace is

Improper adjustment, alteration, service, maintenance, or installation can cause

serious injury or death.

Read and follow instructions and precautions in User's Information Manual

provided with this furnace. Installation and service must be performed by a qualified service agency or the gas

supplier,

_, CAUTION

Check entire gas assembly for leaks after lighting this appliance.

I INSTALLATION

1. This furnace must be installed in accordance with the manufacturer's

instructions and local codes. In the absence of local codes, follow the National

Fuel Gas Code ANSI Z223.1 / NFPA54 or CSA B-149.1 Gas Installation Code.

2. This furnace must be installed so there are provisions for combustion and ventilation

air. See manufacturer's installation

information provided with this appliance.

OPERATION

This furnace is equipped with manual reset limit switch(es) in burner compartment to

protect against overheat conditions that can result from inadequate combustion air

supply or blocked vent conditions.

1. Do not bypass limit switches.

2. If a limit opens, call a quallified serviceman to correct the condition

and reset limit switch.

equipped for use with natural

gas at altitudes 0 - 10,000 ft

(0 - 3,050m).

An accessory kit, supplied by

the manufacturer, shall be used to convert to propane gas use

or may be required for some

natural gas applications.

This furnace is for indoor

installation in a building constructed on site.

This furnace may be installed

on combustible flooring in alcove or closet at minimum clearance

as indicated by the diagram

from combustible material.

This furnace may be used with

a Type B-1 Vent and may be

vented in common with other gas fired appliances.

DOWNFLOWPOSITIONS:

Installation on non-combustible floors only.

For Installation on combustible flooring only when installed on special base, Part No. KGASB0201ALL or NAHA01101SB, Coil Assembly,

Part No. CAR, CAP, CNPV, CNRV, END4X, ENW4X, WENC, WTNC, WENW OR WTNW.

18 inches front clearance required for alcove.

,k Indicates supply or return sides when furnace is in the horizontal

position. Line contact only permissible between lines formed by intersections of the Top and two Sides of the furnace jacket,

and building joists, studs or framing.

_. 336996-101 REV. C

(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 85°F (29°C) db. Failure to follow these return-air temperature limits may affect

reliability of heat exchangers, motors, and controls. (See Figure 3).

For accessory installation details, refer to the applicable instruction literature.

NOTE: Remove all shipping brackets and materials before operating the furnace.

INSTALLATION I

UPFLOW, DOWNFLOW, and

I his furnace is approved for

HORIZONTAL installations.

Clearancearrows donotchangewith

furnaceorientation.

Clearancein inches

Vent Clearance to combustibles:

ForSingleWall vents 6 inches(6 po). ForType B-1venttype 1inch(1 po).

MINIMUM INCHES CLEARANCE TO

COMBUSTIBLE CONSTRUCTION

IIIIIIIIIIIIIIIIIIIIIIIII

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.

4 Spedficationsaresubjecttochangewithoutnotice. 441 01 1411 05

In the United States, follow all codes and standards for the following: Safety

• USA: National Fuel Gas Code (NFGC) NFPA 54-2012/ANSI Z223.1-2012 and the Installation

Standards, Warm Air Heating and Air Conditioning Systems ANSI/NFPA 90B

Figure 3 - Return Air Temperature

_ °F

ELECTROSTATIC DISCHARGE (ESD)

PRECAUTIONS PROCEDURE

I_ AX 80 °F/27 °C

FRONT

_MIN 60°F/16°0

General Installation

• Current edition of the NFGC and the NFPA 90B. For copies, contact the National Fire Protection Associ-

ation 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, DO 20001 (www.AGA.org).

Combustion and Ventilation Air

• NFGC NFPA 54/ANSI Z223.1-2012 Section 9.3, Air

for Combustion and Ventilation.

Duct Systems

• Air Conditioning Contractors Association (ACCA) Manual D, Sheet Metal and Air Conditioning Con-

tractors National Association (SMACNA), or Americ-

an Society of Heating, Refrigeration, and Air Condi-

tioning Engineers (ASHRAE) 2005 Fundamentals

Handbook Chapter 35 or 2004 HVAC Systems and Equipment Handbook Chapters 9 and 16.

Acoustical Lining and Fibrous Glass Duct

• Current edition of SMACNA and NFPA 90B as

tested by UL Standard 181 for Class I Rigid Air

Ducts

Gas Piping and Gas Pipe Pressure Testing

• NFGC NFPA 54/ANSI Z223.1-2012; chapters 5, 6, 7, and 8 and National Plumbing Codes.

Electrical Connections

National Electrical Code (NEC) NFPA 70-2011.

Venting

NFGC NFPA 54 / ANSI Z223.1-2012; Chapters 12 and 13.

A06745

FURNACE RELIABILITY HAZARD

Improper installation or service of furnace may cause

premature furnace component failure.

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.

1. Disconnect all power to the furnace. Multiple discon- nects 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 furnace chassis which is close to the control. 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 discharged.

3. After touching the chassis, you may proceed to service the control or connecting wires as long as you do noth-

ing to recharge your body with static electricity (for ex- ample; DO NOT move or shuffle your feet, do not touch

ungrounded objects, etc.).

4. If you touch ungrounded objects (and recharge your body with static electricity), firmly touch a clean, un-

painted metal surface of the furnace again before touching control or wires.

5. Use this procedure for installed and uninstatled (un- grounded) furnaces.

6. Before removing a new control from its container, dis- charge your body's electrostatic charge to ground to

protect the control from damage. If the control is to be installed 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 be-

fore touching ungrounded objects.

7. An ESD service kit (available from commercial sources) may also be used to prevent ESD damage.

441 01 1411 05 Spedficat)onsaresubjecttochangew)thoutnoflce. 5

THE BLOWER IS LOCATED

TOTHE RIGHT OFTHE

BURNERSECTION, AND

AIR CONDITIONED AIR IS

DISCHARGEDTO THE LEFT.

Figure 4 - Multipoise Orientations

AIRFLOW

THE BLOWER IS

LOCATED BELOWTHE

BURNERSECTION, AND

CONDITIONED AIR iS

DISCHARGED UPWARD.

_ HORIZONTAL RIGH_AIRF L_C W

LOCATEDABOVE THE

BURNER SECTION,AND

THE BLOWER IS '_7

CONDITIONEDAiR iS

DISCHARGED DOWNWARD

LOCATION

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 Figure 4. This furnace must:

• be installed so the electrical components are protec- ted from water.

• not 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 model numbers END4X,

ENW4X or coil casing model number NAEA when installed on combustible materials or wood flooring

(refer to SAFETY CONSIDERATIONS).

• be located as close to the chimney or vent and at- tached to an air distribution system. Refer to Air

Ducts section.

• be provided ample space for servicing and cleaning. Always comply with minimum fire protection clear-

ances shown on the furnace clearance to combust- ible label.

The following types of furnace installations may require OUTDOOR AIR for combustion due to chemical exposures:

• Commercial buildings

• Buildings with indoor pools

• Laundry rooms

• Hobby or craft rooms, and

• Chemical storage areas

wow

AIRFLOW

CARBON MONOXIDE POISONING 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.

If air is exposed to the following substances, it should not be used for combustion air, and outdoor air may be required for

combustion:

• Permanent wave solutions

• Chlorinated waxes and cleaners

• Chlorine based swimming pool chemicals

• Water softening chemicals

• De-icing salts or chemicals

• Carbon tetrachloride

• Halogen type refrigerants

• Cleaning solvents (such as perchloroethylene)

• Printing inks, paint removers, varnishes, etc.

• Hydrochloric acid

• Cements and glues

• Antistatic fabric softeners for clothes dryers

• Masonry acid washing materials

THE BLOWER IS

LOCATED TO THE LEFT

OF THE BURNER SECTION,

AND CONDiTiONED AIR IS

DISCHARGED TO THE RIGHT.

A02097

6 Specificationsaresubjecttochangewithout notice. 441 01 1411 05

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.

Figure 5 - Installation in a Garage

18-1N. (457.2 mm)

MINIMUM TO BURNERS

A93044

FIRE 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.

PERSONAL INJURY AND/OR PROPERTY DAMAGE HAZARD

Improper use or installation of this furnace may cause premature furnace component failure.

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°O) and 80°F (27°0), 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.

Table 2 - Minimum Free Area Required for Each Combustion Air Opening or Duct to Outdoors

TWO HORIZONTAL DUCTS SINGLE DUCT OR OPENING TWO OPENINGS OR VERTICAL

FURNACE (1,100 SQ. MM/K_,0 (734 SQ. MM/K_,0 (1 SQ. IN./4,000 BTUH)

INPUT (550 SQ. MM/K_,0

(BTUH) Free Area of Open- Round Duct Free Area of Open- Round Duct Free Area of Round Duct

44,000 22 (14193) 6 (152) 14.7 (9484) 5 (127) 11 (7097) 4 (102) 66,000 33 (21290) 7 (178) 22 (14193) 6 (152) 18.5 (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 68 (42581) 10 (254) 44 (28387) 8 (203) 33 (21290) 7 (178)

FURNACE TOTAL INPUT

110,000 + 30,000 = (140,000 divided by 4,000)

66,000 + 40,000 = (106,000 divided by 3,000) 88,000 + 30,000 = (118,000 divided by 2,000)

441 01 1411 05 Specificationsaresubjecttochangewithoutnotice. 7

(1 SQ. IN./2,000 BTUH) (1 SQ. IN./3,000 BTUH) DUCTS

ing and Duct Diameter ing and Duct Diameter Opening and Duct Diameter

(sq. in. / sq. ram) (in./mm) (sq. In. / sq. ram) (in. / ram) (sq. In. / sq. ram) (In./mm)

EXAMPLES: Determining Free Area

WATER

HEATER

= 35.0 Sq. In. for each two Vertical Ducts or Openings = 35.3 Sq. In. for a Single Duct or Opening

= 59.0 Sq. In. for each of two Horizontal Ducts

Table 3 - Minimum Space volumes for 100% combustion, Ventilation, and Dilution from Indoors

OTHER THAN FAN-ASSISTED TOTAL FAN-ASSISTED TOTAL

ACH

0.60 1,050

0.50 1,260

0.40 1,575

0.30 2,100

0.20 3,150

0.10 6,300

0.00 NP

ACH = Air Changes/Hour

NP= Not Permitted

(1,000'S BTUH GAS INPUT RATE (1,000'S BTUH GAS INPUT RATE)

30 40 50 44 66 88 110 132

1,400 1,750 1,100 1,650 2,200 2,750 3,300 1,680 2,100 1,320 1,980 2,640 3,300 3,960

2,100 2,625 1,650 2,475 3,300 4,125 4,950 2,800 3,500 2,200 3,300 4,400 5,500 6,600 4,200 5,250 3,300 4,950 6,600 8,250 9,900 8,400 10,500 6,600 9,900 13,200 16,500 19,800

NP NP NP NP NP NP NP

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 Figure 6)

Space Volume (ft.3)

AIR FOR COMBUSTION AND

VENTILATION

Provisions for adequate combustion, ventilation, and dilution air must be provided in accordance with:

• U.S. installations: Section 9.3 ofthe NFGC NFPA 54/ANSI Z223.1-2012, Air for Combustion and Vent-

ilation, and applicable provisions of the local building codes.

Figure 6 - Prohibit Installation on Back

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

BACK

warning in venting section of these instructions to

determine if an adequate amount of make-up air is

available.

The requirements for combustion and ventilation air depend

A02054

upon whether or not the furnace is located in a space having a volume of at least 50 cubic feet per 1,000 Btuh input rating for all gas appliances installed in the space.

• Spaces having less than 50 cubic feet per 1,000 Btuh require the OUTDOOR COMBUSTION AIR

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

Outdoor Combustion Air Method

heat exchangers and shorten furnace life. Air contaminants are found in aerosol sprays,

detergents, bleaches, cleaning solvents, salts, air

fresheners, and other household products.

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.

8 Specificationsaresubjecttochangewithout notice. 441 01 1411 05

METHOD,

• Spaces having at least 50 cubic feet per 1,000 Btuh may use the INDOOR COMBUSTION AIR,

STANDARD or KNOWN AIR INFILTRATION

METHOD.

1. Provide the space with sufficient air for proper combus- tion, ventilation, and dilution of flue gases using per-

manent horizontal or vertical duct(s) or opening(s) dir- ectly communicating with the outdoors or spaces that

freely communicate with the outdoors.

2. Figure 7 illustrates how to provide TWO OUTDOOR OPENINGS, one inlet and one outlet combustion and

ventilation air opening, to the outdoors. a. 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.

b. Size openings and ducts per Figure 7 and Table 2.

c. TWO HORIZONTAL DUCTS require 1 square inch of

free area per 2,000 Btuh (1,100 mm2/kW) of combined input for all gas appliances in the space per Figure 7

and Table 2.

d. TWO OPENINGS OR VERTICAL DUCTS require 1

square inch of free area per 4,000 Btuh (550 mm2/kW) for combined input of all gas appliances in the space

per Figure 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" (300 mm) of the ceiling. Appliances in the space shall have clearances of at

least 1" (25 mm) from the sides and back and 6" (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.

Figure 7 - Air for Combustion, Ventilation, and Dilution

from Outdoors

1 SQ tN.

PER 4000

E_ G

(305mm)

BTUH*

1 SQ tN.

12_X (305mm)

SC PE 40(

BTL

03 [C

o o

k- S

1sc

40_

BTt.

1", M (305mm)

A03174

OUTDOORS

ilJii:iii iJiiiiiil

iiiii ii El

/3o m j

lSO_N.&lq

PER 2000 ' I ]1

I I

D OTSI/

PER 2000 _ II,

ram) 12" MAXI |

CIRCULATING AtR DUCTS

*Minimum dimensions of 3 in. (76 mm). NOTE: Use any of the following combinations of openings:

A&B, C&D, D&E, F&G

I i i 12" MAX

TO PER 4OOO

OUTDOORS BTUH*

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.

The Standard Method:

1. The space has no less volume than 50 cubic feet per 1,000 Btuh of the maximum input ratings for all gas ap-

pliances 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 Z223.1-2012/NFPA 54-2012, 9.3.2.2:

1. For other than fan-assisted appliances, such as a draft hood-equipped water heater:

21ft3 L 'other "_

VOIU m e Other = A-_0--H L,T000 "a-'_/h r=)

A04002

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

V°lumeFan = ACH _000 Btu/hrJ

A004003

If: Iother = combined 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" (300 mm) of the

ceiling and the second opening shall commence with-

input of all other than fan-assisted

441 01 1411 05 specificationsaresubjecttochangewithout notice. 9

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

of air openings shall be at least 3 in. (80 mm). (See

Figure 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.

Figure 8 - Air for Combustion, Ventilation, and Dilution

from Indoors

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 Outdoor Combustion Air Method mentioned previ-

ously 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 Meth- od below.

Figure 9 - Removing Bottom Closure Panel

CIRCULATING AiR

DUCTS

I I I I I I I I I I I I I

INTERIOR

HEATED

SPACE

i i

CIRCULATING AIR DUCTS

*Minimum opening size is 100 in.2 with minimum dimensions of 3 in. (76 mm). *Minimum of 3 in, (76 mm), when type -B1 vent is used.

VENT THROUGH ROOF

_< 12" AX(305mm)

------1 SQ iN. PER 1000

BTUH* iN DOOR ORWALL

UNCONFINED SPACE

6" MIN (152mm) (FRONT)0

1 SQ iN. PER 1000 BTUH* iN DOOR

-- OR WALL

12" MAX (305mm)

A03175

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 outdoors 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 Meth- od, infiltration should be adequate to provide air for

combustion, permanent ventilation and dilution of flue gases. However, in buildings with unusually tight con-

struction, additional air MUST be provided using the

methods described in the Outdoor Combustion Air Method section.

Unusually tight construction is defined as construction with:

a. Walls and ceilings exposed to the outdoors have a

continuous, sealed vapor barrier. Openings are gas- keted 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.

BOTTOM CLOSURE PANEL

BOTTOM FILLER PANEL

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 minim-

um dimension of air openings shall be not less than 3 in. (80 mm).

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 two screws holding bottom filler panel. (See Figure 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 only side return air is used. NOTE: Side return-air openings can be used in UPFLOW

and most HORIZONTAL configurations. Do not use side return-air openings in DOWNFLOW configuration.

Levelinq Leqs (If Desired) In upflow position with side return inlet(s), leveling legs may

be used. (See Figure 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

10 specificationsaresubjecttochangewithout notice. 441 01 1411 05

closure panel to install leveling legs. To remove bottom closure panel, see Item 1. in Bottom Return Air Inlet section.

To install leveling legs:

1. Position furnace on its back. Locate and drill a hole in each bottom corner of furnace. (See Figure 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. (In- stall flat washer if desired.)

Figure 10 - Leveling Legs

(8mm)

1 3/4'

(44mm)

Figure 11 - Floor and Plenum Opening Dimensions

13/4" (44mm)

Figure 12 - Furnace, Plenum, and Subbase Installed

A96283

on a Combustible Floor

(8mm)

5/16"

(8mm)

(44mm) 1 3/4"

(44ram) 1

A89014

4. Adjust outside nut to provide desired height, and tight- en inside nut to secure arrangement.

5. Reinstall bottom closure panel if removed.

DOWNFLOW INSTALLATION

NOTE: For downflow applications, this furnace is approved

FURNACE

(OR COIL CASING

WHEN USED)

COMBUSTIBLE --

FLOORING \

SUBBASE

SHEET METAL

PLENUM

__ FLOOR __

OPENING

for use on combustible flooring when any one of the following two accessories are used:

• Downflow combustible floor subbase

• Coil model numbers END4X, ENW4X

• Coil casing model number NAEA

1. Determine application being installed from Table 4.

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

3. Construct plenum to dimensions specified in Table 4 and Figure 11.

Figure 13 - Furnace, Plenum, and Coil or

Coil Casing Installed on a Combustible Floor

4. If downflow subbase is used, install as shown in Figure 12. If coil model numbers END4X, ENW4X or coil casing model number NAEA are used, install as shown in Figure 13.

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 casing. 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 Figure 14)

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 two screws holding bottom filler panel. (See Figure 9)

2. Rotate bottom filler panel downward to release holding tabs.

3. Remove bottom closure panel.

4. Reinstall bottom filler panel and screws

441 01 1411 05 specificationsaresubjecttochangewithout notice. 11

A96285

A08556

Table 4 - Opening Dimensions - In. (mm)

FURNACE

CASING

WIDTH

Upflow Applications on Combustible or Noncombustible Flooring 12-11/16 21-5/8 13-5/16 22-1/4

Downflow Applications on Noncombustible Flooring 12-9/16 19 13-3/16 19-5/8

14-3/16 (subbase not required) (319) (483) (335) (498)

(360) Downflow Applications on Combustible Flooring (subbase required) (284) (483) (34t) (600)

Downflow Applications on Combustible Flooring with Coil END4X, 12-5/16 19 13-5/16 20

ENW4X or Coil Casing NAEA (subbase not required) (313) (483) (338) (508)

Upflow Applications on Combustible or Noncombustible Flooring 16 21-5/8 16-5/8 22-1/4

Downflow Applications on Noncombustible Flooring 15-7/8 19 16-1/2 19-5/8

17-1/2 (subbase not required) (403) (483) (419) (498)

(445) Downflow Applications on Combustible Flooring (subbase required) (384) (483) (425) (600)

Downflow Applications on Combustible Flooring Coil with Coil 15-1/2 19 16-1/2 20

END4X, ENW4X or Coil Casing NAEA (subbase not required) (394) (483) (419) (508)

Upflow Applications on Combustible or Noncombustible Flooring 19-1/2 21-5/8 20-1/8 22-1/4

Downflow Applications on Noncombustible Flooring 19-3/8 19 20 19-5/8

21 (subbase not required) (492) (483) (508) (498)

(533) Downflow Applications on Combustible Flooring (subbase required) (473) (483) (514) (600)

Downflow Applications on Combustible Flooring with Coil END4X, 19 19 20 20

ENW4X or Coil Casing NAEA (subbase not required) (483) (483) (508) (508)

Upflow Applications on Combustible or Noncombustible Flooring 23 21-1/8 23-5/8 22-1/4

Downflow Applications on Noncombustible Flooring 22-7/8 19 23-1/2 19-5/8

24-1/2 (subbase not required) (581) (483) (597) (498)

(622) Downflow Applications on Combustible Flooring (subbase required) (562) (483) (603) (600)

Downflow Applications on Combustible Flooring with Coil END4X, 22-1/2 19 23-1/2 20

ENW4X or Coil Casing NAEA (subbase not required) (572) (483) (597) (508)

APPLICATION

(subbase not required) (322) (549) (338) (565)

(subbase not required) (406) (549) (422) (565)

(subbase not required) (495) (549) (511) (565)

(subbase not required) (584) (537) (600) (565)

PLENUM OPENING FLOOR OPENING

A B C D

11-13/16 19 13-7/16 20-5/8

15-1/8 19 16-3/4 20-5/8

18-5/8 19 20-1/4 20-5/8

22-1/8 19 23-3/4 20-5/8

HORIZONTAL INSTALLATION

FIRE, EXPLOSION, AND CARBON MONOXIDE POISONING 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.

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 Figure 15 and Figure 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 Figure 15 and Figure 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 Figure 2 and Figure 17) For furnaces with 1-in. (25 mm) clearance requirement on side,

set furnace on noncombustible 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 mm 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 Figure 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 two screws holding bottom filler panel. (See Figure 9)

12 Specificationsaresubjecttochangewithoutnotice. 441 01 1411 05

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

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 Figure 20). FILTER ARRANGEMENT

CARBON MONOXIDE AND POISONING HAZARD

Failure to follow this warning could result in personal injury, or death.

Never operate a furnace without a filter or with filter

access door removed.

There are no provisions for an internal filter rack in these furnaces.

A field-supplied accessory external filter is required. Refer to the instructions supplied with the external filter rack

for assembly and installation options. 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 airstream. The cover attachment shall prevent leaks.

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 Figure 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 degrees 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 Figure 14) The supply-air duct must be connected to ONLY the furnace

supply outlet or air conditioning coil casing (when used). When installed on combustible material, supply-air duct must

be connected to ONLY the 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 accessories. All accessories MUST be connected to

duct external to furnace casing.

441 01 1411 05 Specff(cat)onsaresubjecttochangew)thoutnot)ce. 13

Figure 14 - Duct Flanges

UPFLOW

120°_ MIN

DOWNFLOW HORIZONTAL

i .....

YES

YES 120°"_ YES 120°_ YES

MIN MIN

Figure 15 - Horizontal Unit Suspension

_ /4" (6mm) THREADED ROD

YES

NO NO

4 REQ.

YES

A02020

OUTER DOOR ASSEMBLY

8" (203mm) MIN FOR DOOR REMOVAL

(2) HEX NUTS, (2) WASHERS & (2) LOCK WASHERS REQ. PER ROD

SECURE ANGLE

IRON TO BOTTOM OF FURNACE WITH 3 #8 xS/4'' (19ram) SCREWS TYPICAL FOR 2 SUPPORTS

1" (25mm) SQUARE, 1-1/4"xl-1/4"xt/8" (32x32x3mm) ANGLE IRON OR UNI-STRUT MAY BE USED

A10130

14 specificationsaresubjecttochangewithout notice. 441 01 1411 05

Figure 16 - Horizontal Suspension with Straps

22 GAUGE GALVANIZED STRAPS TYPICAL

FOR 4 STRAPS

AIR

.-'OPENING

OUTER DOOR

ASSEMBLY X III I

AIR OPENING

IIII

Figure 17 - Typical Attic Installation

LINE CONTACT ONLY PERMISSIBLE BETWEEN LINES FORMED BY INTERSECTIONS OF

THE TOP AND TWO SIDES OF THE FURNACE JACKET AND BUILDING JOISTS,

STUDS, OR FRAMING•

ENTRY

METHOD 2 USE (4) #8 x 3/4 (19 mm) SHEET

METAL SCREWS FOR EACH STRAR THE STRAPS SHOULD BE VERTICAL AGAINST THE FURNACE SIDES AND NOT PULL AWAY

FROM THE FURNACE SIDES.

BACK OF FURNACE

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

17 3/4" (451 mm)OVERALL

4 3/4" (121mm) UNDER DOOR

I" (25mm) UNDER FURNACE

VENT

EXTEND OUT 12" (305mm) FROM FACE OF DOOR

304N. (762mm) MIN WORKAREA *WHEN USED WFH

SINGLE WALL VENT CONNECTIONS

EQUIPMENT MANUAL

SHUT*OFF GAS VALVE

SEDIMENT

TRAP

Return Air Connections

UNION

Downflow Furnaces

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

(bottom inlet) as shown in Figure 21. DO NOT cut into casing sides (left or right). Side opening is permitted for only upflow

FIRE HAZARD

Failure to follow this warning could cause personal injury, death and/or property damage.

Never connect return-air ducts to the back of the

furnace. Refer to the following instructions.

441 01 1411 05 specificationsaresubjecttochangewithout notice. 15

and most horizontal furnaces. (See Figure21) 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

A10164

furnace casing as shown in Figure 20 and Figure 22. Bypass

humidifier may be attached into unused return air side of the

furnace casing. (See Figure 20 and Figure 22)

Not all horizontal furnaces are approved for side return air

connections. (See Figure 22)

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. A fire or explosion may result causing property damage, personal injury or loss of life.

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.

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. (2 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.

An accessible manual equipment shutoff valve MUST be installed external to furnace casing and within 6 ft. (2 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 control 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 Figure 48)

Some installations require gas entry on right side of furnace

(as viewed in upflow). (See Figure 18)

Install a sediment trap in riser leading to furnace as shown in Figure 19. 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.

Figure 18 - Burner and Manifold

TOP VmEW OF BURNER AND MANmFOLD ASSEMBLY

FURNACE OVERHEAT HAZARD

Failure to follow this caution may result in property damage.

Connect gas pipe to gas valve using a backup wrench to avoid damaging gas controls and burner

misatignment.

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.

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 ap- proved by the state of Massachusetts.

90 ° Elbow_

2" (51 ram)Nipple

t-Gas Valve

Figure 19 - Typical Gas Pipe Arrangement

GAS--

SUPPLY _'"_

MANUALJ II SHUTOFF _ _

VALVE

(REQUIRED)jf_ /

SEDIMENT-- /

TRAP /

UNION----_

Supply

A08551

A02035

16 specificationsaresubjecttochangewithout notice. 441 01 1411 05

Table 5 - Air Delivery - CFM (With Filter)*

UNIT SIZE COLOR SPEED EXTERNAL STATIC PRESSURE (in. w.c.)

Gray 5 1185 1145 1115 1075 1035 980 905 820 720 580

0451408

0701716 Blue 3 1240 1200 1155 1110 1065 1020 975 935 895 850

0902116 Blue 3 1365 1320 1270 1215 1170 1125 1070 1025 955 900

1102120 Blue 3 1945 1890 1830 1770 1715 1655 1600 1545 1480 1430

1352420 Blue 3 1910 1865 1800 1745 1685 1610 1545 1485 1435 1380

*A filter is required for each return-air inlet.Ai#low pe#ormance included 3/4-in. (19 mm)washable filter mediasuch as contained infactor-authorized accesso_ filter rack, To determineairflow performance without this filter,assumean additional 0,1 in.w.c, availableexternal static pressure.

-- Indicates unstableoper_ing conditions.

NOMINAL IRON INTERNAL

SIZE IN. (mm) In. (mm) 10 20 30 40 50

1-1/4 (32) 1.380 (35) 1400 (427) 950 (290) 770 (235) 660 (201) 580 (177) 1-1/2 (38) 1.610 (4t) 2100 (640) 1460 (445) 1180 (360) 990 (301) 900 (274)

* 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: Chapter 6 ANSI Z223-2012/NFPA 54-2012.

Yellow 4 920 880 835 800 755 720 680 645 605 540

Blue 3 735 685 625 585 530 490 435 395 345 295

Orange 2 820 765 725 670 630 580 545 490 455 405

Red 1 650 595 535 490 430 390 330 280 235 --

Gray 5 1625 1585 1535 1495 1460 1415 1365 1295 1220 1125

Yellow 4 1405 1360 1320 1280 1240 1195 1155 1115 1070 1030

Orange 2 1190 1140 1095 1050 1000 955 915 870 830 790

Red 1 1035 985 930 885 835 785 745 695 650 600

Gray 5 1845 1800 1755 1710 1665 1595 1500 1400 1275 1105

Yellow 4 1590 1545 1500 1455 1410 1365 1315 1270 1180 1000

Orange 2 1225 1160 1110 1060 1010 950 895 830 770 710

Red 1 1100 1030 960 875 805 730 645 570 505 425

Gray 5 2255 2205 2150 2100 2040 1985 1920 1835 1735 1615

Yellow 4 1600 1525 1465 1400 1335 1275 1210 1150 1080 1015

Orange 2 1420 1340 1280 1200 1140 1065 1005 925 865 790

Red 1 1280 1205 1140 1055 990 910 840 760 695 630

Gray 5 2295 2240 2185 2125 2070 2005 1925 1805 1670 1545

Yellow 4 1725 1660 1605 1545 1460 1395 1340 1285 1230 1170

Orange 2 1630 1575 1510 1435 1365 1300 1245 1185 1130 1065

Red 1 1430 1355 1285 1200 1125 1075 1015 945 855 800

PIPE DIAMETER LENGTH OF PIPE - FT, (M)

1/2 (13) 0.622 (16) 175 (53) 120 (37) 97 (30) 82 (25) 73 (22)

3/4 (19) 0.824 (21) 360 (110) 250 (76) 200 (61) 170 (52) 151 (46)

1 (25) 1.049 (27) 680 (207) 465 (142) 375 (114) 320 (98) 285 (87)

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

Table 6 - Maximum Capacity of Pipe*

Piping should be pressure and leak tested in accordance with NFGC in the United States, 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

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.

less than 0.5 psig (14-in. w.c.), turn off electric shutoff switch

441 01 1411 05 Specificat)onsaresubjecttochangew)thoutnot)ce. 17

Figure 20 - Upflow Return Air Configurations and Restrictions

UPFLOW RETURN AiR CONFiGURATiONS AND RESTRICTIONS

RETURN i

AIR

RETURN

CONNECTION 1 CONNECTION 2 CONNECTION 3 COMBINATIONS ONLY ONLY ONLY OF 1,2, AND 3

AIR RETURN AIR

RETURN T _1_ UPFLOW

RESTRICTIONS

AIR FLOW MODELS RETURN AIR RETURN AIR RETURN AIR RETURN AIR

GREATER * 5 TONS AND YES YES YES YES

ALL OTHER MODELS YES YES YES YES

• 2000 CFM AND GREATER AT .6 ESP HI COOLING SPEED

RETURN

AiR

Figure 21 - Downflow Return Air Configurations and Restrictions

AIR

DOWNFLOWRETURNAIRCONFIGURATIONSANDRESTRICTIONS

AIR FLOW MODELS RETURN AIR RETURN AIR RETURN AIR RETURN AIR

5 TONS AND YES NO NO NO GREATER *

ALL OTHER MODELS YES NO NO NO

• 2000 CFM AND GREATER AT .6 ESP HI COOLING SPEED

CONNECTION 1 CONNECTION 2 CONNECTION 3 COMBINATIONS ONLY ONLY ONLY OF 1, 2, AND 3

Figure 22 - Horizontal Return Air Configurations and Restrictions

RETURN

......................../ ........................

, _ SIDERETURNAIR @ NOTPERMITTEDFOR

066,060,-22-2O

AIR FLOWMODELS

AIR

RETURN i

['\ /li/\_ SIDE RETURN AIR

, / _. 2/ NOT PERM _ED FOR_ /_ _ 0e6,060, -Z2-20

_i AIR FLOWMODELS

.................._' .......

• NOTE:RESTRICTIONSAMEFOR AIR HORIZONALLEFT

18 specificationsaresubjecttochangewithout notice. 441 01 1411 05

AIR

HORIZONAL RETURN AIR RESTRICTIONS

HORIZONTAL RETURN AIR CONFIGURATIONS AND RESTRICTIONS

AiR FLOW MODELS RETURN AIR RETURN AIR RETURN AIR RETURN AiR

5 TONS AND YES NO NO NO GREATER *

ALL OTHER MODELS YES YES YES YES

• 2000 CFM AND GREATER AT .6 ESP HI COOLING SPEED

CONNECTION 1 CONNECTION 2 CONNECTION 3 COMBINATIONS ONLY ONLY ONLY OF 1,2, AND 3

Table 7 - Electrical Data

FURNACE

MODEL

0451408A 0701716A 0902116A

1102120A 1352420A

* 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. 1-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.

VOLTS- HERTZ--

PHASE

115-60-1 115-60-1 115-60-1

115-60-1 115-60-1

OPERATING

VOLTAGE*

(VOLTS)

MAX MIN

127 104 127 104 127 104

127 104 127 104

MAX UNIT

(AMPS)

8.1

10.8

11.4

14.2

UNIT

AMPACITY#

(AMPS)

10.9

14.2

14.8

18.2

MAX WIRE

LENGTHS

FT. (M)

34 (10)

26 (8) 25 (7) 31 (9)

31 (9)

MAX FUSE/

CKT BKR?

(AMPS)

15 15 15

20 20

MIN WIRE

GAGE

14 14 14

12 12

ELECTRICAL CONNECTIONS

FURNACE MAY NOT OPERATE

ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD

Failure to follow safety warnings could result in dangerous operation, serious injury, death or property

damage. Improper servicing could result in dangerous operation,

serious injury, death or property damage.

• Before servicing, disconnect all electrical power

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.

to furnace.

• When servicing controls, label all wires prior to disconnecting. Reconnect wires correctly.

• Verify proper operation after servicing.

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 SHOCK HAZARD

Failure to follow this warning could result in personal

Electrical Code (NEC) NFPA 70-2011 and any local codes or ordinances that might apply.

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.

FIRE HAZARD

Failure to follow this warning could result in personal

See Figure 26 for field wiring diagram showing typical field 115-v wiring. Check all factory and field electrical

connections for tightness.

injury, death, or property damage. Do not connect aluminum wire between disconnect

switch and furnace. Use only copper wire.

Field-supplied wiring shall conform with the limitations of 63°F (35°0) rise.

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

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 NFPA 70-2011 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.

furnace.

NOTE: Proper polarity must be maintained for 115-v wiring. If polarity is incorrect, control LED status indicator light will

flash a status code 10 and furnace wilt 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. 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.

441 01 1411 05 specificationsaresubjecttochangewithout notice. 19

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 Electrical Box on Furnace Casing Side

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.

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 position the hole in the electrical box over the hole in

the furnace 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.

5. Pull furnace power wires out of 1/2-in. (12 mm) diamet- er 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 removed in Step 4.

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

12. Complete electrical box wiring and installation. Connect line voltage leads as shown in Figure 26. Use best

practices (NEC in U.S. for wire bushings, strain relief, etc.

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

Figure 23 - Relocating J-Box

FACTORY iNSTALLED

LOCATION

ALTERNATE FIELD

LOCATION

Figure 24 - Field-Supplied Electrical Box on Furnace

Casing

A10141

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) dia- meter 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 Figure 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 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 Figure 26.

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

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

Figure 24) Connect terminal Y/Y2 as shown in Figure 25 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.

20 specificationsaresubjecttochangewithout notice. 441 01 1411 05

ACCESSORIES

1. Electronic Air Cleaner (EAC) Connect an accessory Electronic Air Cleaner (if used) using 1/4-in female quick connect terminals to the two male 1/4-in quick-connect terminals on the control

board marked EAC 1 AMP and NEUTRAL. The termin- als are rated for 115 VAC, 1.0 amps maximum and are

energized during blower motor operation. (See Figure 25)

2. Humidifier (HUM 24VAC) HUM 24VAC: Connect an accessory 24 VAC, 0.5 amp.

maximum humidifier (if used) to the 1/4-1n male quick- connect HUM 24VAC terminal and C screw terminal on

24-V THERMOSTAT

TERMINALS

TEST/TWIN

3-AMP FUSE

COM BLUE 24VAC RED []

LED OPERATION & DIAGNOSTIC LIGHT

the control board thermostat strip. The HUM 24VAC terminal is energized when there is a call for heat (W) and the gas valve relay GVR is energized. (See Figure 25 and Figure 55).

NOTE: A field-supplied, 115-v control relay connected to EAC terminals may be added if humidifier operation is desired during blower operation. NOTE: DO NOT connect furnace control HUM 24VAC

terminal to H (humidifier) terminal on humidity sensing thermostat or similar device. See humidity sensing

thermostat, thermostat, or controller manufacturer's

instructions for proper connection.

Figure 25 - Furnace Control

HEAT OFF-DELAY

[]

2 []

TWINNING AND/OR COMPONENT TEST

TERMINAL HUMIDIFIER TERMINAL

(24-VAC 0.5 AMP MAX

TRANSFORMER 24VAC CONNECTIONS

P1-LOW VOLTAGE MAIN HARNESS CONNECTOR

BLOWER SPEED FAN -

SELECTION TERMINALS

115-VAC (L2) NEUTRAL

CONNECTIONS

SPARE2 -

1_1

115 VAC (L1) NEUTRAL

CONNECTIONS

EAC

1 AMP

EAC TERMINAL

(115 VAC 1,0 AMP MAN,) P2-HQT SURFACE IGNITOR (RSI) &

BL-1 XFMR IN_HSI

INDUCER MOTOR (IND) CONNECTOR

441 01 1411 05 specificationsaresubjecttochangewithout notice. 21

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

.... FIELD 24-VOLT WIRING

.... FIELD 115-, 208/230-, 460-VOLT WIRING

-- FACTORY 24-VOLT WIRING FACTORY 115-VOLT WIRING

115-VOLT FIELD-

SUPPLIED

FUSED

DISCONNECT

NOTE 2

FIVE _ I Y ITERMINALS FIELD-SUPPLIED

WIRE _.. I I I I J FUSED DISCONNECT

THREE-WIRE_ _ I i I --4_

HEATING- "_---q_ ' g-I_

ONLY

,V,.._ @

.__ @

J i i I I [[[

i t

I I I I

i----

..... # .... +----I------

I I I I I I

--;_ 0

JUNCTION _"

BOX

CONTROL

BOX (_

24-VOLT

TERMINAL

BLOCK

FURNACE

_PYgJ .......... I_,

........... IL41---_

NOTES: 1. Connect Y/Y2-terminal as shown for proper operation.

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

3. If any of the original wire, as supplied, must be replaced, use same type or equivalent wire.

,1-STAGE

I I

4_ e-4 k41

j m=m

CONDENSING

UNIT

=m_O = = =] 208/230-

I _ b I tVOLT

=-"_ol--- _'SINGLE

==fl===_.= m=l= = =JPHASE

! _---GND I

208/230- OR

_60-VOLT

PHASE

Figure 27 - ECM Single-Stage Furnace with Single

Stage Air Conditioner

ICPTHERMOSTAT

F_q

ECM SINGLE- SINGLE-STAGE

STAGE FURNACE AIR CONDITIONER

F_q

m-q r_q r-q

r-_ r-_

NOTE 4 -r_

r_q

r-q

r-_ r_q

See notes 1, 3, and 4

Figure 28 - ECM Single-Stage Furnace with Two-Stage

Air Conditioner

ICP THERMOSTAT ECM SINGLE- ]3NO-,STAGE

E2_ E2_

STAGE FURNACE AIR CONDITIONER

-c_

m-q r-_

NOTE 4

r_q

FI HUM

24VAC

r-_ [25

OUTDOOR

SENSOR

See notes 1, 3, and 4

22 specificationsaresubjecttochangewithout notice. 441 01 1411 05

Figure 29 - ECM Single-Stage Furnace with Single-

Stage Heat Pump (Dual Fuel)

Figure 31 - ECM Single-Stage Furnace and Humidifier

Only

ICP THERMOSTAT ECM SINGLE- SINGLE--STAGE

STAGE FURNACE HEAT PUMP

F_q E2_

Fz_-q E2_ E2_

NOTE 4

EZ_

E2_

D HUM

24VAC

OUTDOOR

SENSOR

See notes 1, 2, 3, 4, and 7

Figure 30 - EOM Single-Stage Furnace with Two-Stage

Heat Pump (Dual Fuel)

lOP THERMOSTAT ECM SINGLE- TWO--STAGE

STAGE FURNACE HEAT PUMP

HUMIDITY SENSING

THERMOSTAT

ECM SINGLE-STAGE

FURNACE

HUMIDIFIER

See note 6

Figure 32 - AC with EOM Single-Stage Furnace, Humidi-

fier and Dehumidification

HUMIDITY SENSING

THERMOSTAT

HUMIDIFIER

SPDT

RELAY

ECM SINGLE-,STAGE

FURNACE

, _

_ "-_ 24VAC

HUM

E2D E2_ E2D

EZD E2_

F_q F_q

42_

F_q

NOTE 4 _r_-o-_7

N HUM24VAC

OUTDOOR

SENSOR I

See notes 1, 2, 3, 4, and 7

See notes 5 and 6

441 01 1411 05 specificationsaresubjecttochangewithout notice. 23

Figure 33 - HP with ECM Single-Stage Furnace, Humidi-

fier and Dehumidification

HUMIDITY SENSING ECM SINGLE--STAGE

THERMOSTAT FURNACE

SPDT

RELAY

HUMIDIFIER

See note 6.

NOTES FOR Figure 27 - Figure 33

1. Refer to outdoor equipment Installation Instructions for

additional information and setup procedure.

2. Outdoor Air Temperature Sensor must be attached in all dual fuel application.

3. Refer to ICP thermostat Installation Instructions for ad-

ditional information and setup procedure.

4. When using a Humidity Sensing Thermostat, set DE-

HUMIDIFY OPTIONS to H DE-ENRGZD FOR DEHUM

5. HUM 24VAC terminal is 24 VAC and is energized when the low pressure switch closes during a call for heat.

6. When connecting 115 VAC to humidifier use a separate 115 VAC supply.

7. When using a humidifier on a HP installation, connect humidifier to hot water.

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.

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. 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.

GENERAL VENTING REQUIREMENTS Follow all safety codes for proper vent sizing and installation

requirements, including local building codes, the National Fuel Gas Code ANSI Z223.1-2012/NFPA 54-2012 (NFGC), Parts 12 and 13, the local building codes, and furnace and

vent manufacturers' instructions. These furnaces are design-certified as Category I furnaces in

accordance with ANSI Z21.47-2012/CSA 2.3-2012 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

24 specificationsaresubjecttochangewithout notice. 441 01 1411 05

following information and warning must be considered in addition to the requirements defined in the NFGC.

1. If a vent (common or dedicated) becomes blocked, the furnace will be shut off by the draft safeguard switch

located on the vent elbow.

2. Do not vent 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 appliance.

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 chimney. Refer to Chimney Inspection Chart, Figure 34.

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

exterior 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 211-2012 and must be in good

condition. U.S.A.-Refer to Sections 13.1.8 and 13.2.20 of the NFGC NFPA 54/ANSI Z223.1-2012 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 Z223.1-2012, 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. 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 maximum 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. Chim- neys having internal areas greater than 38 square

inches require furnace input ratings greater than the in- put 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 Figure 34 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 NFGC NFPA 54/ANSI Z223.1-2012,

Section 12.10 for additional information on condens- ate drains.

b. Indicates the chimney exceeds the maximum per-

missible size in the tables, the chimney should be re- built or relined to conform to the requirements of the equipment being installed and the authority having jur-

isdiction.

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.

Exterior Masonry Chimney FAN + NAT

Installations with Type-B Double Wall Vent

Connectors ©NFPA & AGA

Table 8 - Combined Appliance Maximum Input Rating in

Thousands of BTUH per Hour

INTERNAL AREA OF CHIMNEY

VENT HEIGHT

FT. (a)

6 (1.8) 8 (2.4)

10 (3.0)

15 (4.5) 20 (6.0) 30 (9.1)

(7741)

74 8O

84 NR NR NR

IN2 (MM 2)

19 28

(12258) (18064)

119 178

130 193 138 207 152 233

NR 250 NR NR

(24516)

257 279

299 334 368 404

Table 9 - Minimum Allowable Input Rating of Space-

Heating Appliance in Thousands of BTUH per Hour

INTERNAL AREA OF CHIMNEY

VENT HEIGHT

FT (i)

12 I 19 I 28 38

IN2.(MM2)

(7741) _ (12258) 1(18064) (24516)

Local 99% Winter Design

Temperature: 17 to 26°F (--8 to -3°C) 6 (1.8) 0 55 99 141 8 (2.4) 52 74 111 154

10 (3.0) NR 90 125 169 15 (4.6) NR NR 167 212

20 (6.1) NR NR 212 258 30 (9.1) NR NR NR 362

6 (1.8) NR 78 121 166 8 (2.4) NR 94 135 182

10 (3.0) NR 111 149 198

15 (4.6) NR NR 193 247 20 (6.1) NR NR NR 293 30 (9.1) NR NR NR 377

Temperature: --10 to 4°F * (--23 to -16°C)

6 (1.8) NR NR 145 196 8 (2.4) NR NR 159 213

10 (3.0) NR NR 175 231

15 (4.6) NR NR NR 283 20 (6.1) NR NR NR 333 30 (9.1) NR NR NR NR

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 (Un- ited States) or the 2005 ASHRAE Fundamentals handbook, Climatic Design Information chapter, and the CD-ROM included with the 2005 ASHRAE Fun-

damentals Handbook.

Local 99% V_inter Design

Temperature: 5 to 16°F * (--15 to -9°C)

Local 99% V_inter Design

Local 99% Winter Design

Temperature: --11 °F (--24°C) or lower

441 01 1411 05 specificationsaresubjecttochangewithout notice. 25

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 instruc- tions. Low gas input rate causes low vent gas temper-

atures, causing condensation and corrosion in the fur-

nace and/or venting 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 the thermostat heat anticipator or cycle rate to re-

duce 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" (101 mm) round vent elbow is supplied with the furnace.

A 5-inch (127 mm) or 6- inch (152 mm) vent connector may be required for some model furnaces. A field-supplied 4-inch-to-5-inch (101 - 127 mm) or 4-inch-to-6-inch (101

- 152 mm) sheet metal increaser fitting is required when 5-inch (127 mm) or 6-inch (152 mm) vent connector is used. See Figure 35 - Figure 47 Venting Orientation for approved

vent configurations. NOTE: Vent connector length for connector sizing starts at

furnace vent elbow. The 4-inch 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 furnace through one of 5

locations on the casing.

1. Attach the single walt vent connector to the furnace vent elbow, and fasten the vent connector to the vent elbow with at least two field-supplied, corrosion-resist- ant, sheet metal screws located 180 ° apart.

NOTE: A flue extension is recommended to extend from the furnace elbow to outside the furnace casing. 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 Figure 35 - Figure 47.

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.

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 servicin,q furnaces.

26 Specff(cat)onsaresubjecttochangew)thoutnoflce. 441 01 1411 05

Figure 34 - Chimney Inspection Chart

CHIMNEY INSPECTION CHART

Foradditionalrequirementsrefertothe NationalFuel Gas Code NFPA54/ANSI Z223.1 and ANSI/NFPA 211

Chimneys,Fireplaces,Vents, and Solid FuelBurningAppliances

Crown

condition: Rebuild

Missing mortar crown.

or brick?

Is chimney No

property lined with

clay tile liner?

Is Repair

liner and top seal in good or reline chimney as

condition? necessary.

Repair

Debris

in cleanout? Mortar

Mortar, tile, metal vent or tile Remove mortar

fuel oil residue? debris? and tile debris

)ve metal vent [ .1No

or liner. I

Reline

Clay

tile misalignment,

missing sections,

>Yes _,

gaps?

_Not Suitable

Condensate

at bottom

%/" _pe;ly _ ] Suitable sized, listed flexible metal

-,_.L__u, ..=_u ..,_, U,/Yes I liner or Type-B vent per ",,_ype-I_ ven[.r/ _, NFGC Vent

/ -- -. Sizing Tables and liner or

,LYes I " I Not Suitable

Suitable

InsB, II onlmney

I ada-ter -er I vent manufacturers

I instrPuctioPns I Installation instructions.

Chimney

exposed to

outdoors below

roof line?

/ Is chimney _No • , / PartCof

": r---I=,_ '_ to _himney adapter venting'%Suitable

• "_ .... _ .... / _ _ instructions for / "

Yes "_ fuma'_? / _ app.!icat_n /

adapter per

instructions.

441 01 1411 05 specificationsaresubjecttochangewithout notice. 27

The horizontal portion of the venting system shall slope upwards not less than 1/4-in. per linear ft. (21 mm/M) from

the furnace to the vent and shall be rigidly supported every 5

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.

ft. (2 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 Z223.1-2012, any

listed mechanical venter may be used, when approved by the

An accessory Vent Guard Kit is REQUIRED for downflow applications where the vent exits through the lower portion of

the furnace casing. See Figure 39. Refer to the Vent Guard

Kit Instructions for complete details.

authority having jurisdiction. Select the listed mechanical venter to match the Btuh input of

the furnace being vented. Follow all manufacturer's installation requirements for venting and termination included

with the listed mechanical venter.

Cautiontt 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 FURNACE INPUT

ORIENTATION (BTUH/HR) IN (aM)* FT, (i)**

Downflow Vent elbow left, then up Figure 39 132,000 5 (127) 12 (4)

Horizontal Left Figure 42 132,000 5 (127) 7 (2) Horizontal Left Vent elbow right Figure 43 132,000 5 (127) 7 (2)

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

*4 in. (102 ram) inside casing or vent guard **Including 4 in. (102 mm) vent section(s)

VENT ORIENTATION DIAMETER HEIGHT

Vent elbow right, then up

MIN. VENT MIN. VERTICAL VENT

Figure 35 - Upflow Application-Vent Elbow Up Figure 36 - Upflow Application-Vent Elbow Right

_o o_

fk \J

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

on the page following these figures

A03208

28 specificationsaresubjecttochangewffhout notice. 441 01 1411 05

SEE NOTES: 1,2,3,4,7,8,9 on the pages following these figures

A03209

Figure 37 - Downflow Application-Vent Elbow Up then

Left

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

on the page following these figures

Figure39 - DownflowApplication-Vent Elbow Left then

SEE NOTES: 1,2,4,5,6,7,8,9 on the page following these figures

Figure 38 - Downflow Application-Vent Elbow Up

= .

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

these figures

A03210

A03211

A03207

Figure 40 - Downflow Application-Vent Elbow Up then

Right

SEE NOTES:1,2,3,4,5,7,8,9 on the page following

these figures.

A03212

441 01 1411 05 specificationsaresubjecttochangewithout notice. 29

Figure 41 - Horizontal Left Application-Vent Elbow Left

Figure 45 - Horizontal Right Application-Vent Elbow Left

then Up

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

A03213

Figure 42 - Horizontal Left Application-Vent Elbow Right

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

Figure 43 - Horizontal Right Application-Vent Elbow

then Up

A03214

Right

A03219

Figure 46 - Horizontal Left Application-Vent Elbow Right

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

L )

A03216

Figure 47 - Horizontal Right Application-Vent Elbow Left

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

A03214

Figure 44 - Horizontal Left Application-Vent Elbow Up

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

A03215

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

A02068

Venting Notes for Figure 35 - Figure 47

1. For common vent, vent connector sizing and vent material: United States--use the NFGC.

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

5-inch (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 Downflow Vent Guard Kit, is

used in the downflow position.

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

30 specificationsaresubjecttochangewithout notice. 441 01 1411 05

5. Four-inch single-wall (26 ga. min.) vent must be used inside furnace casing and when the Downflow Vent

Guard Kit is used external to the furnace.

6. Accessory Downflow Vent Guard Kit, required in downflow installations with lower vent configuration.

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

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 connectors per vent

connector manufacturer's recommendations.

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.

Step 2--Start-Up Procedures

FIRE AND EXPLOSION HAZARD

Failure to follow this warning could cause 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.

Purge gas lines after all connections have been made.

Check gas lines for leaks.

To Begin Component Self-Test: Remove blower access door. Disconnect the thermo-

stat R lead from the furnace control board. Manually close the blower door switch closed. Short (jumper) the C 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 Figure 25)

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.

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 servicin,q furnaces.

1. Maintain 115-v wiring and ground. Improper polarity will result in flashing a status code 10 and no furnace

operation.

2. Make thermostat wire connections at the 24-v terminal block on the furnace control. Failure to make proper

connections will result in improper operation. (See Figure 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.

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 Figure 51.

a. LED will display previous status code 4 times.

NOTE: If no previous code is present, go directly to b.

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

of component test sequence. c. Hot surface igniter is energized for 15 sec., then off. d. Blower motor operates on FAN speed for 10 sec.

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

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

g. Inducer motor stops. h. 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.

441 01 1411 05 Specificationsaresubjecttochangewithoutnotice. 31

Step 3 --Adjustments Table 10 -Altitude Derate Multiplier for U.S.A.

ALTITUDE PERCENT DERATE

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.

(FT,/ M) OF MULTIPLIER

0-2000 (0-610) 0 1.00

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 ran{

DERATE FACTOR*

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 Figure 49)

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. For altitudes

above 5500 ft. (1676 M), a field-supplied high altitude pressure switch is required.

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.

(610 M), refer to the unit rating plate. For installations

above 2000 ft. (610 M), multiply the input on the rating

plate by the de-rate multiplier in Table 8 for the correct input rate.

Determine the correct orifice and manifold pressure ad-

justment. There are two different orifice and manifold adjustment tables. All models in all positions, except

Low NOx models in downflow or horizontal positions, use Table 13 (22,000 Btuh/Burner).

Low NOx models in the downflow or horizontal posi-

tions must use Table 14 (21,000 Btuh/Burner). See in-

put listed on rating plate.

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

tude) from local gas supplier.

b. Obtain average yearly gas specific gravity from local

gas supplier.

c. Find installation altitude in Table 13 or 14.

d. Find closest natural gas heat value and specific grav-

ity in Table 13 or 14.

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

10, 11,13 and 14. Use only factory-supplied orifices.

See EXAMPLE 1.

EXAMPLE 1:(0 to 2000 ft. (0 to 610 M) altitude) For 22,000 Btuh per burner application use Table 13.

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 Figure 48)

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. Remove regulator seal cap and turn regulator adjust-

ing screw counterclockwise (out) to decrease input rate of clockwise (in) to increase input rate.

h. Install regulator seat cap.

i. 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. Refer to Table 10, 11, 13 and 14. NOTE: If orifice hole appears damaged or it is suspected to

have been redrilted, 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 12 for cubic ft. of gas per hr. e. Multiply gas rate (cu ft./hr) by heating value (Btuh/cu

ft.) to obtain input.

32 Specificat)onsaresubjecttochangew)thoutnot)ce. 441 01 1411 05

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 seat 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 temperat-

ure rise as follows:

NOTE: Blower access door must be installed when taking temperature rise reading. Leaving blower access door off will result in incorrect temperature measurements.

ELECTRICALSHOCKHAZARD

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.

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 particularly important with straight-run ducts.

b. When thermometer readings stabilize, subtract re-

turn-air temperature from supply-air temperature to determine air temperature rise.

NOTE:

If the temperature rise is outside this range, first

check:

(1.) Gas input for heating operation. (2.) Derate for altitude if applicable.

(3.) Return and supply ducts for excessive restric-

tions causing static pressures greater than

0.50-in. w.c.

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 Figure 25) Select desired blower motor speed lead

from one of the other terminals and relocate it to the HEAT terminal (See Table 5 for lead color identifica-

tion). Reconnect original lead to SPARE terminal.

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.

Figure 48 - Gas Control Valve

A06666

Figure 49 - Orifice Hole

BURNEd

ORIFICE

A93059

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.

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 mid-point of rise range or slightly above.

441 01 1411 05 specificationsaresubjecttochangewithout notice. 33

6. Set thermostat heat anticipator. a. Mechanical thermostat - Set thermostat heat anticip-

ator to match the amp. draw of the electrical compon- ents in the R-W circuit. Accurate amp. draw readings

can be obtained at the wires normally connected to thermostat subbase terminals, R and W. The thermo-

stat anticipator should NOT be in the circuit while measuring current.

(1.) Remove thermostat from subbase or from wall. (2.) Connect an amp. meter as shown in Figure 50

across the R and W subbase terminals or R and W wires at wall.

(3.) Record amp. draw across terminals when fur-

nace 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 heat off delay The heat off delay has 4 ad- justable settings from 90 sec to 180 sec. The heat off

delay jumpers are located on the furnace control board. (See Figure 25) To change the heat off delay setting,

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

the pins used for the selected heat off delay. Factory

heat 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 Delivery-CFM (With Filter) for lead color identification.

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

energizes air-circulating blower motor, if furnace over- heats. By using this method to check limit control, it can

be established that limit is functioning properly and will operate if there is a restricted duct system or motor fail-

ure. 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 cardboard

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 shut-

down of the furnace during certain blocked vent condi-

tions. 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 8 minutes, furnace control board will lockout the furnace for 3 hours. To

reset furnace control board, turn thermostat below room temperature or from HEAT to OFF and turn 115v power OFF,

then back ON.

Figure 50 - Amp. Draw Check with Ammeter

THERMOSTAT SUBBASE TERMINALS WITH

THERMOSTAT REMOVED

(ANITICIPATOR, CLOCK, ETC., MUST BE OUT OF CIRCUIT.)

AMMETER

®®@@

10 TURNS

FROM UNIT 24-V

CONTROL TERMINALS

EXAMPLE:

5.0 AMPS ON AMMETER 0.5 AMPS FOR THERMOSTAT 10 TURNS AROUND JAWS ANTICIPATOR SETTING

3. Check Pressure Switch This control

proves operation of the draft inducer

blower.

Turn off 115-v power to furnace.

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 flashes a

status code 3. If hot surface igniter glows when inducer motor is disconnected, shut down furnace immedi-

ately.

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,

and turn on 115-v power.

h. Blower will run for 90 sec and flash status code 1+2

before beginning the call for heat again.

Furnace should ignite normally.

Step 5

--Checklist

Put away tools and instruments. Clean up debris.

Verify that heat off-delay time is selected as desired.

Verify that blower and burner access doors are prop- erly installed.

Cycle test furnace with room thermostat.

Check operation of accessories per manufacturer's in- structions.

Review User's Guide with owner.

Attach literature packet to furnace.

A96316

34 specificationsaresubjecttochangewithout notice. 441 01 1411 05

SECONDS

FOR 1 REVOLUTION

10 1800 50 72 144 360 11 1636 51 71 14t 355 12 1500 52 69 138 346

13 1385 53 68 136 340 14 1286 54 67 133 333 15 1200 55 65 131 327 16 1125 56 64 129 321 17 1059 57 63 126 316

18 1000 58 62 124 310

19 947 59 61 122 305 20 900 60 60 120 300 21 857 62 58 116 290 22 818 64 56 112 281

23 783 66 54 109 273 24 750 68 53 106 265 25 720 70 51 103 257 26 692 72 50 100 250 27 667 74 48 97 243

28 643 76 47 95 237 29 621 78 46 92 231 30 600 80 45 90 225 31 581 82 44 88 220 32 563 84 43 86 214

33 545 86 42 84 209 34 529 88 41 82 205 35 514 90 40 80 200 36 500 92 39 78 196 37 486 94 38 76 192

38 474 96 38 75 188 39 462 98 37 74 184 40 450 100 36 72 180 41 439 102 35 71 178 42 429 104 35 69 173

43 419 106 34 68 170 44 409 108 33 67 167 45 400 110 33 65 164 46 391 112 32 64 161 47 383 116 31 62 155

48 375 120 30 60 150 49 367

Cu Ft.

360 327 3O0

277 257 24O 225 212

200 189 18O 171 164

157 15O 144 138 133

129 124 12O 116 113

1O9 106 1O3 100

97 95

92 9O 88 86

84 82 8O 78 76

75 73

Table 11 - Gas Rate (Cu Ft./Hr.)

SIZE OF TEST DIAL

72O 655 6OO

555 514 48O 45O 424

4OO 379 36O 343 327

313 300 288 277 267

257 248 240 232 225

218 212 206 200 195

189 185 180 176 172

167 164 160 157 153

150 147

1 Cu Ft.

SIZE OF TEST DIAL

2 Cu Ft. 5 Cu Ft.

SECONDS

Cu Ft.2 Cu Ft. 5

FOR 1 REVOLUTION

Table 12 - Filter Size Information (In, / ram)

FURNACE CASING WIDTH

In. (mm)

14-1/2 (368)

17-1/2 (445)

21 (533)

24 (610)

* Recommended

Side Return Bottom Return

16 x25x3/4 14 x25x3/4

(406 x 635 x 19) (356 x 635 x 19)

16X25XN 16X25X3/4

(406 x 635 x 19) (406 x 635 x 19)

16 x 25 x 3/4 20 X 25 X 3/4

(406 x 635 x 19) (508 x 635 x 19)

16 x 25 x 3/4 24 X 25 X 3/4

(406 x 635 x 19) (610 x 635 x 19)

FILTERSIZE(In./mm)

FILTER TYPE

Washable*

441 01 1411 05 Specff(cat)onsaresubjecttochangew)thoutnot)ce. 35

Table 13 - Orifice Size* and Manifold Pressure (in. w.c.) for Gas Input Rate

(TABULATED DATA BASED ON 22,000 BTUH PER BURNER, DERATED 4%/1000 FT (305M) ABOVE SEA LEVEL)

ALTITUDE AVG. GAS SPECIFIC GRAVITY OF NATURAL GAS

RANGE HEAT VALUE 0.58 0.60 0.62 0.64

AT ALTITUDE Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold

ft (m) IBtu/cu ft I No. Pressure No. Pressure No. Pressure No. Pressure

0 925 42 3.3 42 3.4 42 3.5 42 3.7

(0) 950 43 3.8 42 3.3 42 3.4 42 3.5

to 1000 43 3.5 43 3.6 43 3.7 43 3.8

2000 1050 44 3.6 43 3.2 43 3.4 43 3.5 (610) 1075 44 3.4 44 3.5 43 3.2 43 3.3

2001 (611)

3000 (914)

3001 800 43 3.6 43 3.8 42 3.2 42 3.3 (915) 825 43 3.4 43 3.5 43 3.7 43 3.8

4000 900 43 2.9 43 3.0 43 3.1 43 3.2

(1219) 925 43 2.7 43 2.8 43 2.9 43 3.0

4001 775 43 3.4 43 3.5 43 3.6 43 3.8

(1220) 800 43 3.2 43 3.3 43 3.4 43 3.5

5000 875 43 2.7 43 2.8 43 2.9 43 2.9

(1524) 900 43 2.5 43 2.6 43 2.7 43 2.8

5001 750 43 3.2 43 3.3 43 3.4 43 3.5

(1525) 775 43 3.0 43 3.1 43 3.2 43 3.3

6000 850 43 2.5 43 2.5 43 2.6 43 2.7

(1829) 875 43 2.3 43 2.4 43 2.5 43 2.6

6001 700 43 3.1 43 3.3 43 3.4 43 3.5

(1830) 725 43 2.9 43 3.0 43 3.1 43 3.2

7000 800 43 2.4 43 2.5 43 2.6 43 2.7

(2133) 825 43 2.3 43 2.3 43 2.4 43 2.5

900 42 3.5 42 3.6 42 3.7 41 3.5

975 43 3.6 43 3.8 42 3.2 42 3.3

1025 43 3.3 43 3.4 43 3.5 43 3.6

1100 44 3.3 44 3.4 44 3.5 43 3.2

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

775 42 3.2 42 3.3 42 3.4 42 3.5

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

950 43 2.6 43 2.7 43 2.8 43 2.8 750 43 3.6 43 3.8 42 3.2 42 3.3

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

925 43 2.4 43 2.5 43 2.6 43 2.6 725 43 3.4 43 3.5 43 3.6 43 3.7

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

900 43 2.2 43 2.3 43 2.3 43 2.4 675 43 3.4 43 3.5 43 3.6 43 3.7

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

850 43 2.1 43 2.2 43 2.3 43 2.4

A10180

36 specificationsaresubjecttochangewithout notice. 441 01 1411 05

Table 13 - Orifice Size* and Manifold Pressure (in. w.c.) for Gas Input Rate (CENT)

(TABULATED DATA BASED ON 22,000 BTUH PER BURNER, DERATED4%/1000 FT (305M) ABOVE SEA LEVEL)

ALTITUDE AVG. GAS SPECIFIC GRAVITY OF NATURAL GAS

RANGE HEAT VALUE 0.58 0.60 0.62 0.64

AT ALTITUDE Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold

ft (m) IBtu/cu ft/ No. Pressure No. Pressure No. Pressure No. Pressure

650 43 3.1 43 3.2 43 3.4 43 3.5

7001 675 43 2.9 43 3.0 43 3.1 43 3.2

(2134) 700 43 2.7 43 2.8 43 2.9 43 3.0

8000 775 43 2.2 43 2.3 43 2.4 43 2.4

(2438) 800 43 2.1 43 2.1 43 2.2 43 2.3

8001 650 43 2.7 43 2.8 43 2.9 43 3.0

(2439) 675 43 2.5 43 2.6 43 2.7 43 2.8

9000 750 43 2.0 43 2.1 43 2.2 43 2.2

!2743} 775 48 3.6 48 3.7 43 2.0 43 2.1

/ /

9001 600 43 2.7 43 2.8 43 2.9 43 3.0

(2744) 625 43 2.5 43 2.6 43 2.6 43 2.7

10000 700 48 3.7 43 2.0 43 2.1 43 2.2

!3048} 725 48 3.5 48 3.6 48 3.7 43 2.0

* Orifice numbers shown inBOLD

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

825 48 3.7 43 2.0 43 2.1 43 2.2 625 43 2.9 43 3.0 43 3.1 43 3.2

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

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

are factory-installed.

A10180A

441 01 1411 05 specificationsaresubjecttochangewithout notice. 37

Table 14 - Orifice Size* And Manifold Pressure (in. w.c.) For Gas Input Rate

(TABULATED DATA BASED ON 21,000 BTUH PER BURNER, DERATED 4%/1000 FT (305M) ABOVE SEA LEVEL)

ALTITUDE AVG. GAS SPECIFIC GRAVITY OF NATURAL GAS

RANGE HEAT VALUE 0.58 0.60 0.62 0.64

AT ALTITUDE Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold

ft (m) IBtu/cu ft I No. Pressure No. Pressure No. Pressure No. Pressure

0 925 43 3.7 43 3.8 42 3.2 42 3.3

(0) 950 43 3.5 43 3.6 43 3.7 43 3.8

to 1000 44 3.6 43 3.3 43 3.4 43 3.5

2000 1050 44 3.3 44 3.4 44 3.5 43 3.2

(610) 1075 45 3.8 44 3.2 44 3.3 44 3.4

2001 (611) 875 43 3.2 43 3.3 43 3.4 43 3.5

3000 (914) 925 43 2.8 43 2.9 43 3.0 43 3.1

3001 800 43 3.3 43 3.4 43 3.5 43 3.7 (915) 825 43 3.1 43 3.2 43 3.3 43 3.4

4000 900 43 2.6 43 2.7 43 2.8 43 2.9

(1219) 925 43 2.5 43 2.6 43 2.7 43 2.7

4001 775 43 3.1 43 3.2 43 3.3 43 3.4

(1220) 800 43 2.9 43 3.0 43 3.1 43 3.2

5000 875 43 2.4 43 2.5 43 2.6 43 2.7

(1524) 900 43 2.3 43 2.4 43 2.5 43 2.5

5001 750 43 2.9 43 3.0 43 3.1 43 3.2

(1525) 775 43 2.7 43 2.8 43 2.9 43 3.0

6000 850 43 2.2 43 2.3 43 2.4 43 2.5

(1829) 875 43 2.1 43 2.2 43 2.3 43 2.3

6001 700 43 2.9 43 3.0 43 3.1 43 3.2

(1830) 725 43 2.7 43 2.8 43 2.9 43 2.9

7000 800 43 2.2 43 2.3 43 2.3 43 2.4

(2133) 825 43 2.1 43 2.1 43 2.2 43 2.3

900 42 3.2 42 3.3 42 3.4 42 3.5

975 43 3.3 43 3.4 43 3.5 43 3.7

1025 44 3.4 44 3.6 43 3.2 43 3.3

1100 46 3.8 45 3.7 44 3.2 44 3.3

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

900 43 3.0 43 3.1 43 3.2 43 3.3

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

775 43 3.5 43 3.7 43 3.8 42 3.2

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

950 43 2.4 43 2.4 43 2.5 43 2.6 750 43 3.3 43 3.4 43 3.5 43 3.6

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

925 43 2.2 43 2.2 43 2.3 43 2.4 725 43 3.1 43 3.2 43 3.3 43 3.4

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

900 43 2.0 43 2.1 43 2.1 43 2.2 675 43 3.1 43 3.2 43 3.3 43 3.4

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

850 48 3.7 43 2.0 43 2.1 43 2.1

A10181

38 specificationsaresubjecttochangewithout notice. 441 01 1411 05

Table 14- Orifice Size* And Manifold Pressure (in. w.c.) For Gas Input Rate (CONT)

(TABULATED DATA BASED ON 21,000 BTUH PER BURNER, DERATED 4%/1000 FT (305M) ABOVE SEA LEVEL)

ALTITUDE AVG. GAS SPECIFIC GRAVITY OF NATURAL GAS

RANGE HEAT VALUE 0.58 0.60 0.62 0.64

AT ALTITUDE Orifice Manifold Orifice Manifold Orifice Manifold Orifice Manifold

ft (m)

7001 675 43 2.7 43 2.7 43 2.8 43 2.9

(2134) 700 43 2.5 43 2.6 43 2.6 43 2.7

8000 775 43 2.0 43 2.1 43 2.2 43 2.2

(2438) 800 48 36 48 37 43 2.0 43 2.1

8001 650 43 2,5 43 2.5 43 2.6 43 2.7

(2439) 675 43 2.3 43 2.4 43 2.4 43 2.5

9000 750 48 3.5 48 3.6 48 3.7 43 2.0

t2743) 775 3.8 48 3.4 48 3.5 48 3.6

/ /

9001 600 43 2.4 43 2.5 43 2.6 43 2.7

(2744) 625 43 2.3 43 2.3 43 2.4 43 2.5

10000 700 48 3.4 48 3.5 48 3,6 48 3.7

13048) 725 3.7 3.8 48 3,4 48 3.5

IBtu/cu ft 1 No. Pressure No. Pressure No. Pressure No. Pressure

/ /

650 43 2.9 43 3.0 43 3.1 43 3.2

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

825 48 3.3 48 3.5 48 3.6 48 3.7

625 43 2.7 43 2.7 43 2.6 43 2.9

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

650 43 2.1 43 2.2 43 2.2 43 2.3 675 48 36 48 38 43 2.1 43 2.1

* Orifice numbers shown inBOLD are factory-installed.

Figure 51 - Service Label

A10181A

To performstatus coderecall/componenttest,the controlmust be in idlemode(no calls for heat, cool, orfan withthe blower off) displayinga "Heartbeat". Status code recall/component test can be performed in oneof twoways.:

SERVICE

1. Briefly(2-3seconds)connect the TEST/TWINterminal tothe rrc"thermostatterminalwithajumperwire. (NOTE: If connectedfor morethan 4.-5secondsstatus code 10will flash but it willnotoverwritethepreviousstatuscode).

2, Brieflyremovethen reconnect onelimitwire (main,rollout,ordraft-safeguard switch), (NOTE: If limit wire isdisconnectedfor morethan 4-5seconds statuscode 4will flash and the previousstatus code will be lost),

After the status code is flashed4 times the componenttest will begin (see"Component Test Sequence" below), If no previousstatuscode is availablethe control will netflash a status code and will immediatelystart the componenttest. Storedstatuscodesare erased automaticallyafter72 hours.

EACH OF THE FOLLOWING STATUS CODES IS A SINGLE OR TWO DIGIT NUMBER WITH THE FIRST NUMBER DETERMINED BY THE NUMBER OF SHORT FLASHES AND THE SECOND NUMBER AFTER THE PLUS (+) SIGN IS THE NUMBER OF LONG FLASHES.

LED STATUS CODES

HEARTBEAT (bright-dim) - Control has 24VAC power

2 PRESSURESWITCHDIDNOT OPEN Check for:

- Obstructedpressuretubing. - Pressureswitch stuck closed,

3 PRESSURESWITCH DIDNOT CLOSE ORREOPENED- If open longerthan five

minutes,inducershutsoff for 15 minutesbefore retry.Check for: - Excessivewind

- Propervent sizing - Defectiveinducermotor

- Low inducervoltage(115VAC) - Defectivepressureswitch

- Inadequatecombustionair supply - Disconnectedorobstructedpressuretubing

- Low inlet gas pressure(if LGPS used) - Restrictedvent If it opensduring bloweron-delay period, blower will comeonforthe selectedbloweroff-delay.

4 LIMITCIRCUITFAULT- Indicates a limit,draft safeguard,flamerollout,or blocked ventswitch

(ifused) isopen. Blower will runfor 4 minutesoruntil open switchremakes whicheverislonger, If open longer than3 minutes,code changesto lockout#7. If openlessthan3 minutesstatus code#4 continues to flash until blowershutsoff. Flame rolloutswitch and BVSSrequire

manualreset. Check for: - Restricted vent - Proper vent sizing - Looseblowerwheel

- Excessivewind - Dirtyfilteror restricted duct system - Defectiveblower motoror capacitor

- Defectiveswitch or connections - Inadequatecombustionair supply(FlameRoll-outSwitchopen)

5 ABNORMALFLAME-PROVINGSIGNAL - Flame is provedwhile gas valve isde.energized.

Indunerwillrununtilfaultiscleared. Checkfor: - Leaky gas valve -Stuck..opengasvalve

6 IGNITIONPROVINGFAILURE - Controlwilltry three moretimesbefore lockout#6+1 occurs,

If flamesignallost during bloweron-,delayperiod,blowerwill come on for theselected bloweroff-delay. Check for: - Flame sensormustnotbe grounded

Gasvalve and humidifierwill not beturnedon Componentswillbe tested in sequenceas follows: Inducermotor will run for entire componenttest,andthe following componentsareON for 10- 15secondseach individually; hot surface igniter, FAN (if equipped),HEAT speed, COOL speed.

COMPONENT TEST SEQUENCE

6 Continued - Oxidebuildupon flamesensor(clean with fine steelwool),

- Proper flame sensemicrcamps(,5microampsD,C, min,,4,0- 6,0 nominal),

- Gas valve defectiveor gas valve turned off - Manualvalveshut-off - Low inlet gas pressure

- Defective HotSurface Ignitor - Control groundcontinuity - Inadequateflamecarryoveror rough ignition

- Green/Yellowwire MUST beconnectedto furnacesheet metal.

7 LIMIT CIRCUITLOCKOUT - Lockoutoccursif thelimit,draft safeguard,flame rollout,or blockedvent

switch (ifused) isopen longerthan 3 minutes, - Control willauto reset after threehours, - Refer to #4,

8 GAS HEATING LOCKOUT - Control will NOT auto reset, Check for:

- Mis-wiredgasvalve - Defectivecontrol (valverelay)

10 POLARITY - Linevoltage(115VAC)polarityreversed. - Iftwinned, referto twinningkitinstructions. 1+2 BLOWER ONAFTER POWERUP (115VACor 24VAC) -Blower runsfor 90 seconds,if unit is powered

up during a callfor heat (R-Wclosed) or (R-W)opensduringblower on-delay,

during bloweron,delay, 6+1 IGNITIONLOCKOUT -Controlwillauto-resetafterthreehours, Referto#6, OFF SECONDARYVOLTAGEFUSEISOPEN Checkfor: - Door switch notclosed

-115VACatL1 and Neutral,24VACat 24VAC REDand COMBLUE,24V Fuse3A

- Door switch notclosed - Short circuit in secondaryvoltage (24VAC)wiring.

ON CONTROLCIRCUITRY LOCKOUT Auto-resetafterone hour lockout due to;

SOLID -Gasvalve relaystuck open - Flame sensecircuitfailure - Softwarecheck error

Resetpowerto clearlockout. Replacecontrolifstatus code repeats.

IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII

337016-101REV.A

441 01 1411 05 specificafionsaresubjecttochangewithout notice. 39

SERVICE AND MAINTENANCE

PROCEDURES

Untrained personnel can perform basic maintenance functions

such as cleaning and replacing air filters. All other operations must be performed by trained service personnel. A qualified ser-

vice person should inspect the furnace once a year.

FIRE, INJURY, OR DEATH 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.

ELECTRICAL SHOCK, FIRE OR EXPLOSION 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 disconnect switch. Lock out and tag switch with a suitable warning label. Verify proper operation after servicing.

ELECTRICAL OPERATION HAZARD

Failure to follow this caution may result in improper

furnace operation or failure of furnace.

Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and

dangerous operation.

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 4, you must revise your orientation to

component location accordingly.

ELECTRICAL CONTROLS AND WIRING

ELECTRICAL OPERATION HAZARD

Failure to follow this warning could result in personal injury or death.

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. Lock out and tag switch with a suitable warning label.

The electrical ground and polarity for 115-v wiring must be properly maintained. Refer to Figure 26 for field wiring

information and to Figure 55 for furnace wiring information. NOTE: If the polarity is not correct, the STATUS LED on the

control will flash a status code 10 and prevent the furnace from heating. 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 Figure 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 be off 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. Status codes can be viewed

at the sight glass in blower access door. The furnace control LED is either ON continuously, flashing a heartbeat, or a

status code. For an explanation of status codes, refer to service label

located on blower access door or Figure 51. See Figure 56 for a brief Troubleshooting Guide.

STATUS CODE RECOVERY AND COMPONENT TEST

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. Perform component self-test as shown on the SERVICE

label, located on the of blower access door.

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.

40 Specificationsaresubjecttochangewithoutnotice. 441 01 1411 05

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 a lock out tag before performing any

maintenance or service. Follow the operating instructions on the label attached to the furnace.

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.

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.

The minimum maintenance on this furnace is as follows:

1. Check and clean/replace 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 sea- son for rust, corrosion, soot or excessive dust. If neces-

sary, 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 recom- mended 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.

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.

NOTE: The blower wheel should not be dropped or bent as balance wilt 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 ac-

cess door: a. Disconnect vent connector from furnace vent elbow.

b. Disconnect and remove short piece of vent pipe from

within furnace.

4. Remove two screws from blower access door and re- move blower access door.

5. All factory wires can be left connected, but field thermo- stat connections may need to be disconnected de-

pending on their length and routing.

6. Remove two 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 ap-

propriate 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 power choke wires (if used) 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.-Ib, when reassembling).

d. Remove bolts holding motor to blower housing and

slide motor out of wheel (40+/-10 in.-Ib, when reas- sembling).

e. Remove blower wheel from housing.

f. Clean wheel and housing.

441 01 1411 05 Specificationsaresubjecttochangewithoutnotice. 41

10. Reassemble motor and blower by reversing steps 11f through 11a, finishing with 11a. 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 reposi-

tion if necessary.

12. Spin the blower wheel by hand to verify that the wheel does not rub on the housing.

13. Reinstall blower assembly infurnace.

14. Reinstall two screws securing blower assembly to blower deck.

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.

NOTE: Refer to Table 5 for motor speed lead relocation if leads were not identified before disconnection.

15. Refer to furnace wiring diagram, and connect thermo- stat leads if previously disconnected.

16. To check blower for proper rotation: a. Turn on electrical supply.

ELECTRICALSHOCKHAZARD

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.

b. Manually close blower access door switch.

NOTE: If thermostat terminals are jumpered at the time

blower access door switch is closed, blower wilt 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 blower access door.

d. Verify blower is rotating in the correct direction.

17. If furnace is operating properly, RELEASE BLOWER ACCESS DOOR SWITCH. Remove any jumpers or re-

connect any disconnected thermostat leads. Replace blower access door.

18. 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.

19. Reinstall outer door.

20. Cycle furnace through one complete heating and cool- ing cycle. Verify the furnace temperature rise as shown

in "Adjustments" Section. Adjust temperature 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 oc-

cur): 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.

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 re- moved 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. Remove NOx baffles if installed.

NOTE: Be very careful when removing burner assembly to avoid breaking igniter. See Figure 52 and Figure 53 for correct igniter location.

9. Using field-provided 25-caliber rifle cleaning brush, 36-in. (914 mm) long, 1/4" (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.

42 Specificationsaresubjecttochangewithoutnotice. 441 01 1411 05

Figure 52 - Igniter Position-Side View

7.1 mm

9/32"--_

5/16"

7.9 mm

A05025

Figure 53 - Igniter Position-Top View

8"mmA05026

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 celt and slowly rotate with drill. DO NOT force cable. Gradually insert cable into upper pass of

cell. (See Figure 54 )

(3.) Work cable in and out of celt 3 or 4 times to obtain

sufficient cleaning. DO NOT pull cable with great force. Reverse drill and gradually work cable out.

(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 fur-

nace has been cleaned.

(6.) Using vacuum cleaner, remove residue from

each cell.

(7.) Using vacuum cleaner with soft brush attach-

ment, 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 a vegetable oil cooking spray that does not contain corn oil, canola oil, hatogenated

hydrocarbons or aromatic content, which may prevent an inadequate seat from occuring, and RTV sealant such as G.E. RTV 162, G.E. RTV 6702, or Dow-Corning RTV 738

sealant are required. DO NOT substitute any other type of RTV sealant.

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 connection 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. Se- curely fasten vent connector to vent elbow with 2 field-

supplied, corrosion-resistant, sheet metal screws loc- ated 180° apart.

16. Replace blower access door only, ifit 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.

19. Check for gas leaks.

20. Replace outer access door.

Figure 54 - Cleaning Heat Exchanger Cell

A91252

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. A fire or explosion may result causing property damage, personal injury or loss of life.

441 01 1411 05 Specificationsaresubjecttochangewithoutnotice. 43

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 Figure 55, 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-second blower-only ON period two seconds after power is restored, if the thermostat is still calling for gas heating. The GREEN LED light will flash code

1+2 during the 90-second period, after which the LED will be flashing a heartbeat, as long as no faults are detected. After

the 90-second 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 Figure 26 for thermostat connections.)

The wall thermostat "calls for heat," closing the R-to-W

circuit. The furnace control performs a self-check, veri-

fies the pressure switch contacts PRS are open, and starts the inducer motor IBM.

a. Inducer Prepurge Period- The inducer enable relay

contacts IDR close and allow 115 VAC to inducer mo- tor. As the inducer motor IBM comes up to speed, the

pressure switch contacts PRS close to begin a

15-second 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, and 24 vac power is supplied for a field-installed humidifier at the HUM 24VAC termin-

al. 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 proving period begins. The HSI igniter will remain energized until the flame

issensed or until the 2-second flame proving period

begins.

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 24VAC or

COM to the furnace control CPU (not at W, G, R, etc.).

Ifflame 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.

Blower-On Belay- If the burner flame is proven, the

blower motor is energized on HEAT speed 25 seconds after the gas valve GV is energized.

Simultaneously, the electronic air cleaner terminal

EAC 1 AMP is energized and remains energized as long as the blower motor BLWM is energized.

f. Heat-Off Belay- 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-en-

ergizing the humidifier terminal HUM 24 VAC. The in- ducer motor IDM will remain energized for a 5-second

post-purge period. The blower motor BLWM and air cleaner terminal EAC 1 AMP will remain energized for

90, 120, 150, or 180 seconds (depending on the heat- OFF delay selection). The furnace control CPU is fact-

ory-set for a 120-second heat-OFF delay.

2. Cooling Mode The thermostat "calls for cooling."

a. Single-Speed Cooling

(See Figure 26 - Figure 33 for thermostat connec-

tions) The thermostat closes the R-to-G-and-Y circuits.

The R-to-Y circuit starts the outdoor unit, and the fur- nace control R-to-G-and-Y/Y2 circuits start the fur-

nace blower motor BLWM on COOL speed. The electronic air cleaner terminal EAC 1AMP is ener-

gized with 115 vac when the blower motor BLWM is operating. When the thermostat is satisfied, R-to-

G-and-Y circuits are opened. The outdoor unit will stop, and the furnace blower motor BLWM will contin-

ue operating on the COOL speed for an additional 90 seconds. Jumper Y/Y2 to DHUM to reduce the cooling

off-delay to 5 seconds. (See Figure 25)

b. Two-Speed Cooling

(See Figure 26 - Figure 33 for thermostat connec-

tions.) The thermostat closes the R-to-G-and-Y1 circuits

for low-cooling or closes the R-to-G-and-Yl-and- Y2 circuits for high-cooling. The R-to-Y1 circuit starts

the outdoor unit on low-cooling speed, and the fur- nace control R-to-G-and-Y1 circuit starts the fur-

nace blower motor BLWM on low-cool speed (same speed as FAN). The R-to-Yl-and-Y2 circuits start the outdoor unit on high-cooling speed, and the fur- nace control R-to-G-to-Y1 and Y/Y2 circuits start the

furnace blower motor BLWM on COOL speed. The electronic air cleaner terminal EAC 1AMP is ener-

gized with 115 vac whenever the blower motor BLWM is operating.

When the thermostat is satisfied, the R-to-G-and-Y1 or R-to-G-and-Y1 and Y2 circuits are opened. The

outdoor unit stops, and the furnace blower BLWM and electronic air cleaner terminal EAC 1 AMP will remain

energized for an additional 90 seconds. Jumper Y1 to DHUM to reduce the cooling off-delay to 5 seconds.

(See Figure 25)

3. Dehumidify Mode

(See Figure 27 - Figure 30 for humidity sensing ther-

mostat connections.) The dehumidification output, H on the humidity sensing

thermostat should be connected to the furnace control thermostat terminal DHUM. When there is a dehumidify

demand, the H input is activated, which means 24 vac signal is removed from the DHUM input terminal. In

other words, the DHUM input logic is reversed. The

DHUM input is turned ON when no dehumidify demand

exists. Activation/Deactivation Once 24 vac is detected by the furnace control on the

DHUM input, the furnace control operates in dehumidi-

44 Specff(cat)onsaresubjecttochangew)thoutnot)ce. 441 01 1411 05

fy mode. If the DHUM input is low for more than 48 hours, the furnace control reverts back to non-humidity

sensing thermostat mode. The cooling operation described in item 2. above also

applies to operation with a humidity sensing thermo- stat. The exceptions are listed below:

a. When the R-to-G-and-Y1 circuit is closed and there

is a demand for dehumidification, the furnace blower motor BLWM will continue running at low-cool speed (same speed as FAN).

b. When the R-to-G-and-Y/Y2 circuit is closed and

there is a demand for dehumidification, the furnace blower motor BLWM wilt drop the blower speed from

COOL to HEAT for a maximum of 10 minutes before reverting back to COOL speed. If there is still a de-

mand for dehumidification after 20 minutes, the fur- nace control CPU will drop the blower speed back to

HEAT speed. This alternating 10- minute cycle will continue as long as there is a call for cooling.

c. When the "call for cooling" is satisfied and there is a

demand for dehumidification, the cooling blower-OFF delay is decreased from 90 seconds to 5 seconds.

4. 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 speed as FAN). Terminal EAC 1 AMP is energized as long as the blower motor BLWM

is energized. During a call for heat, the blower BLWM wilt stop during igniter warm-up (17 seconds), ignition

(7 seconds), and blower-on delay (25 seconds), allow-

ing the furnace heat exchangers to heat up more quickly, then restarts at the end of the blower-on delay period at HEAT speed.

In heating, the furnace control CPU will hold the blower motor BLWM at HEAT speed during the selected heat-

off delay period before reverting to continuous-blower speed. When the thermostat "calls for low-cooling," the

blower motor BLWM will remain operating at continu- ous blower speed.

When the thermostat "calls for high-cooling", the blower motor BLWM will operate at COOL speed. When the thermostat is satisfied, the blower motor

BLWM will operate an additional 90 seconds 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 seconds, if no other function requires blower motor

BLWM operation.

Wiring Diagrams

Refer to Figure 25 Figure 55 for wiring diagram.

Troubleshooting

Refer to the service label. (See Figure 51 and Figure 56)

Heat pump

(See Figure 26 - Figure 33 for thermostat connec- tions.) When installed with a heat pump, the furnace control automatically changes the timing sequence to

avoid long blower off times during demand defrost cycles. When the R-to-W-and-Y1 or R-to-W-and-

Yl-and-G circuits are energized the furnace control CPU will switch to or 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 prepur-

ge period, then shut off for 24 seconds then come back on at HEAT speed. When the W input signal disap- pears, the furnace control begins a normal inducer

post-purge period and the blower remains running at HEAT speed for the selected blower-OFF delay period

then switches to low-cool speed (same speed as FAN). If the R-to-W-and-Yl-and-G signals disap-

pear at the same time, the blower motor BLWM will re- main on for the selected blower-OFF delay period. If

the R-to- W-and-Y1 signals disappear, leaving the G signal, the blower motor BLWM will remain on for the

selected blower-OFF delay period then switch to con- tinuous-blower speed. When the R-to-W-and-Y/Y2, R-to-W-and-Y/Y2-and-G, R-to-W-and-Yl-and-Y/

Y2, or R-to-W- and-Yl-and-Y/Y2-and-G circuits are energized the furnace control CPU will switch to or 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 seconds then come back on at HEAT speed. When

the W input signal disappears, the furnace control be- gins a normal inducer post-purge period and the

blower switches to COOL speed after a 3 second delay. If the R-to-W-and-Y/Y2-and-G or R-to-

W-and-Yl-and -Y/Y2-and-G signals disappear at the same time, the blower motor BLWM wilt remain on

for the selected blower-OFF delay period. If the R-to- W-and-Y/Y2 or R-to-W-and-Yl-and-Y/Y2 signals

disappear, leaving the G signal, the blower motor BLWM will remain on for the selected blower-OFF

delay period then switch to continuous blower speed.

441 01 1411 05 Specificationsaresubjecttochangewithoutnotice. 45

DHUM

__ c

N w

c_ o Y/Y2

_ R

c _UUM 24VAC

FUI_ m

NOTE :fl_ FUSE 3AMP

° 2:

CaM BLUE 24MAC RED

HEAT OFF-DELAY

JUMPER SELECTOR

120

TEST/TWIN

PCB

FRS2 LS1 LS2

RED RED RED

CONNECTION DIAGRAM

NOTE #B

n7 I FRS1 DSS

PRS

0/VHEN USED)

OR_G .j

TO 115 VAC FIELD DISCONNECT SWITCH

ILK NEUTRAL L2 / EQUIPMENT

NOTE #2

maROUND

IDR P2

BLWR

BFANR

SCHEMATIC DIAGRAM

(NATURAL& PROPANEGASES)

LO O

"<1"

"t- .J

It}

El.

12NEUTRAL

WHT (COM) J

-- _,MrlT - WHT

m BLK - BLK' °

BLK "_DM

P3 GRN/YEL

BLK

JB DISCONNECT SW,ITCH 0iVHEN REQ'D)

- GND I I

WriT --

FUSE OR CIRCUIT BREAK]ER &

r - - -I NEU IRAL

NOTE#FU_t I

:-l-,

BL1 P7 P7

EACR P6 N

II II EAct_P i._ tl.WAC___

FRS2 LS1 LS1 NOTE#10 pl_ PUS_ TRAN

N XFMR 115VAC N

W I i

DHUM Q- _.:I _ P1"4 LGPS(_ "J

c. I i (WHEN USED)

BoM , I,

BFANR BHT/CLR

BLWR BLWM BVSS CPU

DSS EAC 1 AMP

FRS 1, 2 FSE

FU 1 FU 2

GND GV

GVR 1, 2 HSI HSIR HUM 24VAC

IDM IDR ILK IND

J1 JB LED LGPS

LS1,2

CONTINUOUS FAN SELECT RELAY SPDT BLOWER MOTOR SPEED CHANGE RELAX SPDT

BLOWER MOTOR RELAY, SPST-(N.O.) BLOWER MOTOR, PERMANENT-SPLIT-CAPACITOR

BLOCKED VENT SHUTOFF SWITCH, MAN UAL-RESET, SPST-(N.C.) MICROPROCESSORAND CIRCUITRY

DRAFT SAFE GUARD SWITCH, AUTO-RESET, SPST-(N.C.) ELECTRONICAIR CLEANER CONNEC]ION (EAC 1 AMP MAX.)

FLAME ROLLOUT SWITCH-MANUAL RESET, SPST-(N,C,) FLAME-PROVING ELECTRODE

FUSE, 3 AMP, AUTOMOTIVE BLADE TYPE, FACTORY INSTALLED FUSE OR CIRCUIT BREAKER CURRENT INTERRUPT DEVICE

(FIELD INSTALLED & SUPPLIED)

EQUIPMENT GROUND GAS VALVE-REDUNDANT

GAS VALVE RELAY, DPST-(N,O,) HOT SURFACE IGNITER (11 SVAC)

HOT SURFACE IGNITER RELAY, SPST-(N,O,) 24VAC HUMIDIFIER CONNECTION (0,5AMP MAX,) INDUCED DRAFT MOTOR, SHADED-POLE INDUCED DRAFT MOTOR RELAY, SPST-(N,O,)

BLOWER ACCESS PANEL INTERLOCK SWITCH, SPST-(N,O,) INDUCTOR (SEE NOTE #16)

BLOWER- OFF DELAY JUMPER SELECTOR - HEATING JUNCTION BOX

LIGHT-EMI]qING DIODE FOR STATUS CODES- GREEN LOW GAS PRESSURE SWITCH, SPST-(N,O,)

LIMIT SWITCH, AUTO-RESET, SPST-(N,C,)

PCB PRINTED CIRCUIT BOARD CONTROL P1 11-CIRCUIT PCB CONNECTOR

P2 2-CIRCUIT CONNECTOR P3 2-CIRCUIT HSI, CONNECTOR

P5 5-CIRCUIT BLWM SPEED TAP CONNECTOR P6 4-CIRCUIT BLWM POWER CONNECTOR

P7 1-CIRCUIT INDUCER SPLICE CONNECTOR PRS PRESSURE SWITCH, SPST-(N.O.)

TEST/TWIN COMPONENT TEST & TWIN TERMINAL TRAN T RAN S FORM E R- 115VAC/24VAC

JUNCTION

O UNMARKED TERMINAL

PCB CONTROL TERMINAL FACTORY WIRING (115VAC)

FACTORY WIRING (24VAC)

° ° ° FIELD WIRING (115VAC)

- - - FIELD WIRING (24VAC) CONDUCTOR ON CONTROL PCB

Q FIELD WIRING SCREW TERMINAL

FIELD EARTH GROUND

/4-/ EQUIPMENT GROUND

FIELD SPLICE

),_ PLUG RECEPTACLE

I I L, P1-1

il FSE

2 ii =,%P,tt

............................................ !___

1. If any of the original equipment wire is replaced use wire rated far 105_C.

2. Use only copper wire be_,Teen the disconnect switch end the furnace junction box (JB).

3. This wire must be connected to furnace sheet metal for control to prove flame.

4. Symbols are electrical representation only.

5. Solid lines inside PCB are printed circuit board conductors and are not included in legend. _ '<

6. Replace only with a 3 amp fuse. _ :_

7. Inducer (IDM) motor contains internal auto-reset thermal overload switches (OL). _ _z

8. Neutral connections are interchangeable within the Neutral connector block. _

9. Blower motor speed selections are for average conditions, see installation instructions for details _ _, on optimum speed selection, i

10. Factory connected when BVSS (Chimney Adapter Accessory Kit) is not installed. _

11. Factory connected when LGPS is not used. =

12. Ignition-lockout will occur after four consecutive unsuccessful trials-for-ignition. Control will auto-reset after three hours.

13. Blower-on delay: gas heating 25 seconds, cooling or heat pump 2 seconds.

14. Blower-off delay: gas heating selections are 90, 120, 150 or 180 seconds, cooling or heat pump 90 seconds or 5 seconds when J2 is out.

15. BLWM is locked - rotor overload protected by redundant electronic control circuits.

16. Inductor used with 1 HP BLWM.

17. PL5 and PL6 not available on all motors. Blower motor (BLWM) leads may be hardwirsd at motor. ./

I P1-7

l ' P1_3

cO ",<1"

START

Is LED status light ON solid, alternately tlashing bright--dim-bright-dim like a

heartbeat, or flashing ON and OFF?

YES

I Is LED status ON solid?

Is LED status light alternately flashing bright-dim-bright-dim like a heartbeat?

light

Determine status code. The status code is a single or two digit number with the

first number determined by the number of short flashes and the second number

after the plus (+) sign, the number of long flashes.

Go to section below for the flashed status code.

Troubleshooting Guide -Single Stage

IS there 115V at L1 and NEUTRAL? Is there 24V at 24VAC and COM?

NO _ YES

•_ Is the 24V fuse open?

Inspect secondary voltage (24V) wiring,

including thermostat leads for short circuit.

Replace fuse

Replace furnace control.

The control is locked out and will auto- reset after 1 hour. Lockout could be due to any of the following:

- Flame sense circuit failure.

- Gas valve relay stuck open.

- Software check error. Reset power to clear lockout. Replace

control if code repeats.

To recall a status code: Brielly (2 - 3 seconds) connect the TEST/TWIN terminal

to the "C" thermostat terminal with a jumper wire to begin status code recovery and

YES

component test. If a previous status code is present, the code will repeat 4 times then

go on to component test. If no previous code is present, a component test will

begin without 1lashing any status codes.

Component Test Sequence: Gas valve and humidifier will not be turned on. Inducer motor will start and remain on until

the end of the blower test, then off. The following components are on for 10 -15

seconds each individually: hot surface igniter, blower speeds: FAN (if present),

HEAT, COOL.

E_S Was there a previous status code?

YES

}--_ Is door switch closed?

NC _ YES

i is there115V going to switch ?

I I Replace door switch.

---_ Replace transformer.

and G (24V) thermostat signals?

._ Does the control respond to W, Y1, Y/Y2,

cycle to check operation. Status codes

I un system through a heat, or cooling

are erased after 72 hours.

Replace furnace control.

YES

Close the door switch.

H Is circuit breaker closed?

I I Check for continuity in wire from circuit

breaker to furnace.

START.

I lose circuit breaker and go back to

interconnecting cable.

I heck room thermostat or I

thermostat terminals on the furnace control?

_ YES

_l YES

jumper wire?

Does the problem repeat when using a I

The thermostat is not compatible with the furnace control. Either install a ballast

resistor, connect the C furnace control thermostat terminal to the thermostat, or

replace the thermostat.

I F

'13

0'1 O)

--I

._.

III

2 PRESSURE SWITCH DID NOT OPEN

Check for:

- Obstructed pressure tube.

- Pressure switch stuck closed.

3 PRESSURE SWITCH DID NOT CLOSE

OR REOPENED If opens during blower on-delay period, blower will come on for

the selected blower off-delay. If open longer than 5 minutes inducer shuts off for 15 minutes before retry. Checkfor:

- Proper vent sizing.

- Low inlet gas pressure (if LGPS used).

- Inadequate combustion air supply.

- Disconnected or obstructed pressure tubing.

- Defective or miswired pressure switches

- Excessive wind.

- Restricted vent.

- Defective Inducer motor.

- Low inducer voltage (115 VAC)

LIMIT CIRCUIT FAULT - Indicates the limit, draft safeguard, flame rollout, or

blocked vent switch (if used) is open. Blower will run for 4 min. or until open

switch remakes whichever is longer. If open longer than 3 min, code changes to lockout #7. If open less than 3 min. status code #4 continues to flash until blower shuts off. Flame rollout and blocked vent

switch require manual reset. Check for:

- Restricted vent.

- Loose blower wheel.

- Defective switch or connections.

- Propervent sizing.

- Dirty filter or restricted duct system.

- Excessive wind.

- Inadequate combustion air supply. (Flame rollout switch open)

- Defective blower motor

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

energized. Inducer will run until fault is

._ 5

cleared. Check for:

- Stuck open or leaky gas valve.

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 #6 + 1 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 before going to the next step.

- Gas valve electric switch on?

- Manual shut-offvalve open?

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

- Flame sensor must not be grounded.

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. Refer to status code #4.

8 GAS HEATING LOCKOUT - Control will

NOT auto reset. 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.

10 POLARITY - Check for correct line

voltage polarity. If units are twinned, check for proper low-voltage (24V)

transformer phasing.

1 + 2 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/W1 closed) or when (R--W/W1 opens)

during the blower on-delay period.

6 + 1 IGNITION LOCKOUT -System failed to

ignite gas and prove flame in 4 attempts. Control will auto-reset after 3

hours. Refer to status code #6.

To determine whether the problem is in the gas / valve, igniter, or flame sensor the system can be I'_

operated in component test mode. To check the [ N igniter, remove the R thermostat connection |

from the control, reset power, start the | component test. Does the igniter glow /

orange!white by the end of the 15 second warm- [ Y

up period? F

NOTE: NUMBER IN UPPER LEFT HAND

CORNER REPRESENTS FLASH CODE

Unplug igniter harness from control and repeat component test. Check for 115V between connector P2 (HSI) and NEUTRAL4_2 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 DO current below 0.5 _lA?

Clean flame sensor with fine steel wool and recheck current. Nominal current is

4.0 to 6.0ttA DC.

Is current near typical value?

Will main burners ignite and stay on?

Fixed.

YES

_ YES

YES

Replace furnace control.

Check for continuity in the harness and igniter. Replace defective component.

Check connections. If OK, replace control.

Check that gas valve electric switch is turned on. Replace valve.

Check for:

- Inadequate flame carryover

or rough ignition.

- Low inlet gas pressure.

- Proper firing rate.

- Air leakage around igniter bracket.

Allow blower to come on and repeat test to check for intermittent operation.

If current is near typical value (4.0-6.0_ DC nominal) and

burners will not stay on, Check connections and retry.

replace control.

-_ Replace electrode.

H Replace furnace control.

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

DIGIT POSITION F or G= Mainline

N = Entry 8 = 80% AFUE

M = Multiposition

V = Variable Speed Blower Motor - ECM

X = ECM Blower Motor S = Single-stage

T = Two-stage

N = Standard L = Low Nox

045 = 45,000 BTU/hr 070 = 70,000 BTU/hr 090 = 90,000 BTU/hr 110 = 110,000 BTU/hr 135 = 135,000 BTU/hr

14 = 143/16" 17 = 171/2''

21 = 21" 24 = 241/2''

08 = 800 CFM 12 = 1200 CFM 14 = 1400 CFM 16 = 1600 CFM 20 = 2000 CFM 22 = 2200 CFM

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

1 2

F 8

EFFICIENCY

POSITION

4 5

X L

TYPE

FEATURE

Vent elbow assembly

6,7,8

045

HEAT INPUT

CABINET WIDTH

SALES (MAJOR) REVISION DIGIT

Gas valve Manual reset limit switches

HEAT EXCHANGER GROUP

Heat exchanger cell Celt panel

Lox NOx baffle (California models only)

INDUCER GROUP Housing assembly

Pressure switch Inducer motor Inducer wheel

9,10

COOLING AIRFLOW

ENGINEERING (MINOR) REVISION DIGIT

11,12

TO OBTAIN INFORMATION ON PARTS: Consult your installing dealer or the classified section of your local telephone directory under the "Heating Equipment" or "Air Conditioning Contractors and Systems" headings for dealer listing by brand name, or contact:

International Comfort Products

Consumer Relations Department

Have available the product/model number and the serial number located on the unit rating plate to ensure correct replacement parts. 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.

Specificationsaresubjecttochangewithoutnotice. 441 01 1411 05

RO. Box 128

Lewisburg, TN 37091, USA

931-270-4100

Lewisburg, TN 37091 USA

ICP F8MXL0451408A1, F8MXL0701716A1, F8MXL0902116A1, F8MXL1102120A1, F8MXL1352420A1 Installation Guide

Specifications and Main Features

Frequently Asked Questions

User Manual