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

...

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

I-- 5 16/16 | [150.7]

/ r- s1/2

Figure 1 - Dimensional Drawing

i 1,;o.tt'1:'

27_

1"_-71

='"1 F

[i sl tit

L ......

21.6 6.1

BOT._M[s'la.5]

INLET

28,39

['nl.2]

['n_

TOPOF_WNG I l l 4 la/1e

[1_7]

ST_

[148.S] S_--

57110 [14,t.Sl

[lS'IH1 llVffl _

_ [40.21

/ /,i .=q

I-

_86/8

61_V16--

p7e.Sl

"l I ¢1a/4

[els]-_1 A

s] L 1/1e

I [51.O] 1

___. [,k_s]

_-- _7/8

[=21=]

ACC_

t 1

[_vz.ojm_4] /

/ t" &BOXPROVISION

147/8

la_.a]

(nOTH=,DES)

t, .......... __4

--D_ _ _V4

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.

VEHTING(6PLACE8)

[r_

_IDEINLET

(nOTH81DF.S)

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

+ 34 hidden pages

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

Specifications and Main Features

Frequently Asked Questions

User Manual