Carrier 58CTX15510020, 58CTX13510022, 58CTX13510016, 58CTX11010022, 58CTX11010016 Installation Guide

...

Installation, Start-up, Operating and

Service and Maintenance Instructions

SAFETY CONSIDERATIONS ........................ 2 SERVICE AND MAINTENANCE PROCEDURES ..... 44

INTRODUCTION .................................. 3 Introduction ................................... 44

CODES AND STANDARDS .......................... 5 Care and Maintenance ........................... 45

Safety ........................................... 5

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 ......... 7

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

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

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

HORIZONTAL INSTALLATION .................. 11

FILTER ARRANGEMENT ....................... 15

AIR DUCTS ................................... 15

GAS PIPING .................................. 17

ELECTRICAL CONNECTIONS .................. 21

VENTING .................................... 26

START-UP, ADJUSTMENT, AND SAFETY CHECK ..... 33

General ........................................ 33

Start-Up Procedures .............................. 34

Adjustments ..................................... 34

Check Safety Controls ............................. 39

Checklist ....................................... 39

Sequence of Operation ........................... 49

Wiring Diagrams ............................... 52

Troubleshooting ................................ 52

PARTS REPLACEMENT INFORMATION GUIDE ..... 55

Always Ask For

Use of the AltRI Certified IM Mark indicates a manul'acturer's participation in the program. For verification of certification l'or individual products,

go to www.ahridirectory.org.

ISO9001

QMt-SAI Global

NOTE: Read the entire instruction manual before starting the installation.

Portions of the text and tables are reprinted from NFPA 54/ANSI Z223.1-2012©, with permission of National Fire Protection

Association, Quincy, MA 02269 and American Gas Association, Washington DC 20001. This reprinted material is not the

complete and official position of the NFPA or ANSI on the referenced subject, which is represented only by the standard in

its entirety.

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NOTES:

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

2. Minimum return-air openings at furnace, based on metal duct. if flex duct is used, see flex duct manufacturer's recommendations for equivalent diameters. a, For 800 CFM-16-in. (406 mm) round or 14 1/2 x 12-in. (368 x 305 mm) rectangle.

b. For 1200 CFM-20-in. (508 mm) round or 14 1/2 x 19 1/2-in. (368 x 495 mm) rectangle. c. For 1600 CFM-22-in. (559 mm) round or 14 1/2 x 22 1/16-in. (368 x 560mm) rectangle.

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

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

Fig. 1 - Dimensional Drawing

A10290

Table 1 - Dimensions - In. (mm)

FURNACE SIZE CABINET BOTTOM CONNECTION FILTER MEDIA

045 - 08/024045 045 - 12/036045

070 - 08/024070 070 - 12/036070 070 - 16/048070 090 - 14/042090 090 - 16/048090

090 - 20/060090 110-12/036110 110-16/048110 110-22/066110 135-16/048135

135 -22/066135 155 -20/060155 22- 7/8 (581)

WIDTH OUTLET WIDTH BOTTOM FLUE iNLET WIDTH SIZE LB (KG) CABINET

14-3/16 (360) 12-9/16 (319) 9-5/16 (237) 12-11/16 (322) 4 (102) 104 (47) 16 (406) 14-3/16 (360) 12-9/16 (319) 9-5/16 (237) 12-11/16 (322) 4 (102) 107 (49) 16 (406) 14-3/16 (360) 12-9/16 (319) 9-5/16 (237) 12-11/16 (322) 4 (102) 111 (50) 16 (406) 14-3/16 (360) 12-9/16 (319) 9-5/16 (237) 12-11/16 (322) 4 (102) 115 (52) 16(406)

17-1/2 (445) 15-7/8 (403) 11-9/16 (294) 16 (406) 4 (102) 126 (57) 16 (406) 17-1/2 (445) 15-7/8 (403) 11-9/16 (294) 16 (406) 4 (102) 127 (58) 16 (406)

21 (533) 19-3/8 (492) 13-5/16 (338) 19-1/2 (495) 4 (102) 140 (64) 20 (508) 21 (533) 19-3/8 (492) 13-5/16 (338) 19-1/2 (495) 4 (102) 146 (66) 20 (508)

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

21 (533) 19-3/8 (492) 13-5/16 (338) 19-1/2 (495) 4 (102) 146 (66) 20 (508) 21 (533) 19-3/8 (492) 13-5/16 (338) 19-1/2 (495) 4 (102) 152 (69) 20 (508)

21 (533) 19-3/8 (492) 13-5/16 (338) 19-1/2 (495) 4 (102)1- 149 (68) 20 (508) 24-1/2 (622) 22-7/8 (581) 15-1/16 (383) 23 (584) 4 (102)1- 163 (74) 24 (610) 24-1/2 (622) 15-1/16 (383) 23 (584) 4 (102)1- 170 (77) 24 (610)

"135 and 155 size furnaces require a 5 or 6-in. (127 or 152 complete installation requirements.

A C D VENT ACCESSORY

B TOP & SHIP WT

COLLAR

mm) vent. Use a vent adapter between furnace and vent stack. See Installation Instructions for

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 iniury 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 sizing.

CUT HAZARD

Failure to t\_llow 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.

Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or

other conditions which may cause death, personal injury, or property damage. Consult a qualified installer, service agency, or

your distributor or branch for information or assistance. The qualified installer or agency must use factory-authorized kits or

accessories when modifying this product. Refer to the individual instructions packaged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses, protective clothing, and work gloves. Have a fire extinguisher available. Read these

instructions thoroughly and follow all warnings or cautions include in literature and attached to the unit. Consult local

building codes, the current editions of the National Fuel Gas Code (NFGC) NFPA 54/ANSI Z223.1 and the National

Electrical Code (NEC) NFPA 70.

Recognize safety information. This is the safety-alert symbol/_. When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal iniury.

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 iniury or death. WARNING signifies hazards which could result in personal iniury or death. CAUTION is

used to identify unsafe practices which may result in minor personal iniury or product and property damage. NOTE is used

to highlight suggestions which will result in enhanced installation, reliability, or operation.

product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability,

or operation.

1. Use only with type of gas approved for this furnace. Refer to the furnace rating plate.

2. Install this furnace only in a location and position as spe- cified in the "Location" section of these instructions.

3. Provide adequate combustion and ventilation air to the furnace space as specified in "Air for Combustion and Ventilation" section.

4. Combustion products nmst be discharged outdoors. Con- nect this furnace to an approved vent system only, as spe-

cified in the "Venting" section of these instructions.

5. Never test for gas leaks with an open flame. Use a com- mercially available soap solution made specifically for the

detection of leaks to check all connections, as specified in the "Gas Piping" section.

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

has an external static pressure within the allowable range, as specified in the "Start-Up, Adjustments, and Safety

Check" section. See furnace rating plate.

7. When a furnace is installed so that supply ducts carry air circulated by the furnace to areas outside the space con-

taining the furnace, the return air shall also be handled by duct(s) sealed to the furnace casing and terminating out- side the space containing the furnace. See "Air Ducts" sec- tion.

8. A gas-fired furnace for installation in a residential garage must be installed as specified in the warning box in the

"Location" section.

9. The furnace may be used for construction heat provided that the furnace installation and operation complies with

the first CAUTION in the LOCATION section of these in- structions.

10. These Multipoise Gas-Fired Furnaces are CSA (formerly A.G.A. and C.G.A.) design-certified for use with natural

and propane gases (see furnace rating plate) and for install- ation in alcoves, attics, basements, closets, utility rooms,

crawlspaces, and garages. The furnace is factory-shipped for use with natural gas. A CSA (A.G.A. and C.G.A.) lis-

ted accessory gas conversion kit is required to convert fur- nace for use with propane gas.

11. See Fig. 2 for required clearances to combustible construc- tion.

12. Maintain a 1-in. (25 mm) clearance from combustible ma- terials to supply air ductwork for a distance of 36 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 car- peting, tile, or any other combustible material other than

wood flooring. In downflow installations, factory access- ory floor base MUST be used when installed on combust-

ible materials and wood flooring. Special base is not re- quired when this furnace is installed on manufacturer's

Coil Assembly Part No. CAR, CAP, CNRV, CNPV or when Coil Box Part No. KCAKC is used. See Fig. 2 for

clearance to combustible construction information.

INTRODUCTION

The Series 140/E 4-way multipoise Category I fan-assisted furnace is CSA (formerly A.G.A. and C.G.A.) 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.Thisfurnaceisnotapprovedforinstallationin mobile homes,recreationalvehicles,oroutdoors.

Thesefurnacesshallnotbeinstalleddirectlyoncarpeting,tile,or anyothercombustiblematerialotherthanwoodflooring.For

downflowinstallations,afactoryaccessoryfloorbasemustbe usedwheninstalledoncombustiblematerialsandwoodflooring.

Thisspecialbaseisnotrequiredwhenthisfurnaceisinstalledon themanufacturer'scoilassembly,orwhenthemanufacturer'scoil

boxisused.SeeFig.2forclearancetocombustiblematerial information.

Thisfurnaceisdesignedforminimumcontinuousreturn-air temperatureof60°F(16°C)dborintermittentoperationdownto

MINIMUMINCHESCLEARANCETO COMBUSTIBLECONSTRUCTION

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.

Check entire gas assembly for leaks after lighting this appliance.

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.

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.

Fig. 2 - Clearances to Combustibles

55°F(13°C)dbsuchaswhenusedwithanightsetback thermostat.Return-airtemperaturemustnotexceed80°F(27°C) db.Failureto followthesereturn-airtemperaturelimitsmay

affectreliabilityofheatexchangers,motors,andcontrols.(See Fig.3.)

Foraccessoryinstallationdetails,referto theapplicable instructionliterature.

NOTE:Removeallshippingbracketsandmaterialsbefore operatingthefurnace.

iNSTALLATiON

This furnace is approved for UPFLOW, DOWNFLOW, and

HORIZONTAL installations.

Clearancearrows donotchangewith

furnaceorientation.

Clearancein inches

Vent Clearance to combustiNes:

For SingleWall vents 6 inches(6 po). ForType B=I venttype 1 inch(1 po).

MINIMUM INCHES CLEARANCE TO

COMBUSTIBLE CONSTRUCTION

IIIIIIIIIIIIIIIIIIIIIIIIIII

336996-101 REV. C

A10269

FRONT

Step 7 -- Electrical Connections National Electrical Code (NEC) ANSI/NFPA 70-2008

Step 8 -- Venting NFGC; NFPA 54 / ANSI Z223.1-2012 chapters 12 and 13

_'_\ MAX80°F/27 C

ELECTROSTATIC DISCHARGE (ESD)

PRECAUTIONS PROCEDURE

MIN60°F / 16 C

A06745

Fig. 3 - Return Air Temperature

CODES AND STANDARDS

Follow all national and local codes and standards in addition to these instructions. The installation must comply with

regulations of the serving gas supplier, local building, heating, plumbing, and other codes. In absence of local codes, the

installation must comply with the national codes listed below and all authorities having jurisdiction.

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

Step 1 -- Safety

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

Step 2 -- General Installation

Current edition of the NFGC and the NFPA 90B. For copies, contact the National Fire Protection Association Inc.,

Batterymarch Park, Quincy, MA 02269; (www.NFPA.org) or for

only the NFGC, contact the American Gas Association, 400 N. Capitol Street, N.W., Washington DC 20001 (www.AGA.org.)

Step 3 -- Combustion and Ventilation Air

Section 9.3 of the NFGC, NFPA 54/ANSI Z223.1-2012 Air for Combustion and Ventilation

Step 4 -- Duct Systems

Air Conditioning Contractors Association (ACCA) Manual D, Sheet Metal and Air Conditioning Contractors National

Association (SMACNA), or American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE) 2001 Fundamentals Handbook Chapter 34 or 2000 HVAC Systems and Equipment Handbook Chapters 9 and 16.

Step 5 -- 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

Step 6 -- Gas Piping and Gas Pipe Pressure Testing NFPA 54 / ANSI Z223.1-2012; chapters 5, 6, 7, and 8 and

National Plumbing Codes

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 disconnects

may be required. DO NOT TOUCH THE CONTROL OR ANY WIRE CONNECTED TO THE CONTROL PRIOR

TO DISCHARGING YOUR BODY'S ELECTROSTATIC CHARGE TO GROUND.

2. Firmly touch the clean, unpainted, metal surface of the fur- nace chassis which is close to the control. Tools held in a

person's hand during grounding will be satisfactorily dis- charged.

3. After touching the chassis, you may proceed to service the control or connecting wires as long as you do nothing to

recharge your body with static electricity (for example; DO NOT move or shuftle your feet, do not touch un-

grounded objects, etc.).

4. If you touch ungrounded objects (and recharge your body with static electricity), firmly touch a clean, unpainted metal surface of the furnace again before touching control

or wires.

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

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

tect the control from damage. If the control is to be in- stalled in a furnace, follow items 1 through 4 before

bringing the control or yourself in contact with the fur- nace. Put all used and new controls into containers before

touching ungrounded objects.

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

DISCHARGED TO THE LEFT.

DISCHARGED DOWNWARD AIRFLOW

THE BLOWER iS LOCATED

TOTHE RIGHT OFTHE

BURNER SECTION, AND

AIR CONDiTiONED AiR iS

THE BLOWER iS

LOCATED ABOVE THE

BURNER SECTION, AND

CONDiTiONED AIR iS

AIRFLOW

Fig. 4 - Multipoise Orientations

THE BLOWER iS

LOCATED BELOW THE

BURNER SECTION, AND

CONDiTiONED AiR iS

DISCHARGED UPWARD.

! ¢>

AIRFLOW

THE BLOWER iS

LOCATED TO THE LEFT

OF THE BURNER SECTION,

AND CONDiTiONED AiR iS

DISCHARGED TO THE RIGHT.

A02097

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 Fig. 4. NOTE: For high-altitude installations, the high-altitude conversion kit MUST be installed at or above 5500 ft. (1676 M)

above sea level. Obtain high-altitude conversion kit from your area authorized distributor.

This furnace must:

• be installed so the electrical components are protected from water.

• not be installed directly on any combustible material other than wood flooring for upflow applications. Downflow installations require use of a factory-approved floor base or coil assembly when installed on combustible materials or wood flooring (refer to SAFETY CONSIDERATIONS).

• be located close to the chimney or vent and attached to an air distribution system. Refer to Air Ducts section.

• be provided ample space for servicing and cleaning. Always comply with minimum fire protection clearances shown on the

furnace clearance to combustible construction 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

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

CARBON MONOXIDE POISONING AND []NIT

DAMAGE HAZARD

Failure to follow this warning could result in personal iniury or death, and furnace 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.

All fuel-burning equipment must be supplied with air for fuel combustion. Sufficient air must be provided to avoid negative

pressure in the equipment room or space. A positive seal must be made between the furnace cabinet and the return-air duct to

prevent pulling air from the burner area and from draft safeguard opening.

FIRE,INJURYORDEATHHAZARD Failureto 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 (457 mm) above the floor. The furnace must be located or protected to avoid damage by vehicles. When the furnace is installed in a public garage, airplane hangar, or other building having a hazardous atmosphere, the furnace must be installed in accordance with the NFGC. (See Fig.

5.)

18-IN. (457.2 mm)

MINIMUM TO BURNERS

Fig. 5 - Installation in a Garage

FIRE HAZARD

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

Do not install the furnace on its back or hang furnace with control compartment facing downward. Safety control operation will be adversely affected. Never connect

return-air ducts to the back of the furnace. (See Fig. 60

A93044

PROPERTY DAMAGE HAZARD

Improper use or installation of this furnace may cause

premature component failure. This gas furnace may be used

for construction heat 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 roll-out and/or drawing combustion products into the structure.

-The furnace is controlled by a thermostat. It may not be "hot wired" to provide heat continuously to the structure

without thermostatic control.

-Clean outside air is provided for combustion. This is to minimize the corrosive effects of adhesives, sealers and other construction materials. It also prevents the entrainment of drywall dust into combustion air, which can cause fouling and plugging of furnace components.

-The temperature of the return air to the furnace is maintained between 55°F (13°C) and 80°F (27°C), with

no evening setback or shutdown. The use of the furnace while the structure is under construction is deemed to be

intermittent operation per our installation instructions.

-The air temperature rise is within the rated rise range on the furnace rating plate, and the gas input rate has been set to the nameplate value.

-The filters used to clean the circulating air during the construction process must be either changed or thoroughly cleaned prior to occupancy.

-The furnace, ductwork and filters are cleaned as necessary to remove drywall dust and construction debris from all HVAC system components after construction is completed.

-Verify proper furnace operating conditions including ignition, gas input rate, air temperature rise, and venting

accordin_ to these installation instructions.

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.

Fig. 6 - Prohibit Installation on Back

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 of the NFPA 54 /A ANSI Z223.1-2012, Air for Combustion and Ventilation, and applicable provisions of the local building codes.

A02054

FURNACE CORROSION HAZARD Failure to follow this caution may result in furnace damage.

Air for combustion nmst 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.

CARBON MONOXIDE POISONING HAZARD

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

The operation of exhaust fans, kitchen ventilation fans, clothes dryers, attic exhaust fans or fireplaces could create a

NEGATIVE PRESSURE CONDITION at the furnace. Make-up air MUST be provided for the ventilation devices,

in addition to that required by the furnace. Refer to Carbon Monoxide Poisoning Hazard warning in venting section of these instructions to determine if an adequate amount of make-up air is available.

The requirements for combustion and ventilation air depend upon whether or not the furnace is located in a space having a volume

of at least 50 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 Method.

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

Indoor Combustion Air, Standard or Known Air Infiltration

Method.

Outdoor Combustion Air Method

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

ent horizontal or vertical duct(s) or opening(s) directly communicating with the outdoors or spaces that freely

communicate with the outdoors.

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

ventilation air opening, to the outdoors.

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

of the ceiling and the second opening MUST commence within 12 in. (300 ram) of the floor.

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

g. TWO HORIZONTALDUCTS require I -in 2 of free area

per 2,000 Btuh (1,100 mm2/kW) of combined input for all gas appliances in the space per Fig.7 and Table 2.

h. TWO OPENINGS OR VERTICAL DUCTS require 1

-in 2 of free area per 4,000 Btuh (550 mm2/kW) for com- bined input of all gas appliances in the space per Fig. 7

and Table 2.

3. ONE OUTDOOR OPENING requires:

a. One 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 connectors

in the space.

Table 2 - Minimum Free Area Required for Each Combustion Air opening of Duct to Outdoors

TWO HORIZONTAL DUCTS SINGLE DUCT OR OPENING TWO OPENINGS OR VERTICAL DUCTS

FURNACE (1 SQ. IN./2,000 BTUH) (1,100 SQ. MM/KW) (1 SQ. IN./3,000 BTUH) (734 SQ. MM/KW) (1 SQ. IN./4,000 BTUH) (550 SQ. MM/KW)

iNPUT Free Area of Opening Round Duet Free Area of Opening Round Duet Free Area of Opening Round Duet

(BTUH) and Duet Dia. and Duet Dia. and Duet Dia.

Sq. In. (Sq. ram) In. (ram) Sq. In. (Sq. ram) In. (ram) Sq. In. (Sq. ram) In. (ram)

44,000 22 (14194 / 6 (152 / 14.7 (9484/ 5 (127 / 11 (7096 / 4 (102 / 66,000 33 (21290) 7 (178) 22 (14193) 6 (152) 16.5 (10645) 5 (127)

88,000 44 (28387) 8 (203) 29.3 (18903) 7 (178) 22 (14193) 6 (152) 110,000 55 (35484) 9 (229) 36.7 (23677) 7 (178) 27.5 (17742) 6 (152) 132,000 66 (42580) 10 (254) 44 (28387) 8 (203) 33 (21290) 7 (178) 154,000 77 (49677) 10 (254) 51.3 (33096) 9 (229) 38.5 (24839) 8 (203)

EXAMPLES: Determining Free Area

FURNACE WATER HEATER

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

66,000 + 40,000 = (106,000 divided by 3,000) 88,000 4- 30,000 = (118,000 divided by 2,000)

TOTAL INPUT

= 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

CIRCULATING AIR

DUCTS

I I I I I I

I I I

INTERIOR

HEATED

SPACE

CIRCULATING AIR DUCTS

[_ VENTTHROUGH ROOF

I I

I I I I

I I

12" MAX (305mm)

z ,

------1 SO IN. PER 1000 BTUH* IN DOOR O R WALL

UNCONFINED SPACE

6" MtN (152mm)

(FRONT)0

1 SQ IN. PER 1000 BTUH* IN DOOR

-- OR WALL

L 12" MAX (305ram)

OUTDOORS BTUH*

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

A&BC&DD&EF&G

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

Outdoors

PER 4000

A03174

The opening shall commence within 12 in. (300 ram) of the ceiling. Appliances in the space shall have clearances of at least 1

in. (25 ram) from the sides and back and 6 in. (150 ram) from the front. The opening shall directly communicate with the outdoors or shall conmmnicate through a vertical or horizontal duct to the

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

Indoor Combustion Air@ NFPA & AGA Standard and Known-Air-Infiltration Rate Methods

Indoor air is permitted for combustion, ventilation, and dilution, if the Standard or Known-Air-Infiltration Method is used.

CARBON MONOXIDE POISONING HAZARD

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

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.

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

dimensions of 3 in. (76 mm)

1-Minimum of 3 in. (76 mm) when type-B1 vent is used.

A03175

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

Indoors

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 appliances

installed in the space and

2. The air infiltration rate is not known to be less than 0.40 air changes per hour (ACH).

The Known Air Infiltration Rate Method shall be used, if the infiltration rate is known to be:

1. Less than 0.40 ACH and

2. Equal to or greater than 0.10 ACH

Infiltration rates greater than 0.60 ACH shall not be used. The minimum required volume of the space varies with the number of

ACH and shall be determined per Table 3 or Equations 1 and 2. Determine the minimum required volume for each appliance in

the space and add the volumes together to get the total n_ininmm required volume for the space.

Table3 - Minimum Space Volumes for 100 % Combustion, Ventilation, and Dilution from Indoors

OTHER THAN FAN-ASSISTED TOTAL FAN-ASSISTED TOTAL

ACH

0.60 1,050 1,400 1,750 1,100 1,650 2,200 2,750 3,300 3,850

0.50 1,260 1,680 2,100 1,320 1,980 2,640 3,300 3,960 4,620

0.40 1,575 2,100 2,625 1,650 2,475 3,300 4,125 4,950 5,775

0.30 2,100 2,800 3,500 2,200 3,300 4,400 5,500 6,600 7,700

0.20 3,150 4,200 5,250 3,300 4,950 6,600 8,250 9,900 11,550

0.10 6,300 8,400 10,500 6,600 9,900 13,200 16,500 19,800 23,100

0.00 NP NP NP NP NP NP NP NP NP

NP = Not Permitted

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:

Volume - 21ft3 _ I °ther

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

Volume _ 15ft 3 _ I fan

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

Ifan = combined input of all fan-assisted appliances in

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

The following requirements apply to the Standard Method and to the Known Air Infiltration Rate Method.

1. Adjoining rooms can be considered part of a space if: a. There are no closeable doors between rooms.

b. Combining spaces on same floor level. Each opening

shall have free area of at least 1 in.2/1,000 Btuh (2,000 mm2/kW) of the total input rating of all gas appliances

in the space, but not less than 100 in. 2 (0.06 m2). One opening shall commence within 12 in. (300 ram) of the

ceiling and the second opening shall commence within 12 in. (300 ram) of the floor. The nfininmm dimension

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

8.)

c. Combining space on different floor levels. The volumes

of spaces on different floor levels shall be considered as conmmnicating spaces if connected by one or more per- manent openings in doors or floors having free area of

at least 2 in.2/1,000 Btuh (4,400 mm2/kW) of total input rating of all gas appliances.

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

freely conmmnicates with the outdoors provided there are adequate permanent ventilation openings directly to out- doors having free area of at least 1-in.2/4,000 Btuh of

total input rating for all gas appliances in the space.

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

filtration should be adequate to provide air for combus- tion, permanent ventilation and dilution of flue gases.

(1,000s BTUH GAS INPUT RATE) (1,000s BTUH GAS INPUT RATE)

30 40 50 44 66 88 110 132 154

S _ace Volume (ft.3)

However, in buildings with unusually tight construction, additional air MUST be provided using the methods de-

scribed 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 con-

tinuous, sealed vapor barrier. Openings are gasketed or sealed and

Other ACH 000 Btu/hr

A04002

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.

Fan ACH 000 Btu/hr

Combination of Indoor and Outdoor Air

1. Indoor openings shall comply with the Indoor Combus-

A04003

tion Air Method below and,

2. Outdoor openings shall be located as required in the Out- door Combustion Air Method mentioned previously and,

appliances in Btuh/hr

Btuh/hr

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.

Outdoor opening size reduction Factor is 1 nfinus the Ratio in a. above.

Mininmm size of Outdoor openings shall be the size re- quired in Outdoor Combustion Air Method above nml-

tiplied by reduction Factor in b. above. The minimum 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 2 screws holding bottom filler panel. (See Fig. 90

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.

Bottom

Bottom Filler Panel

A10273

Fig. 9 - Removing Bottom Closure Panel

Levelin_ Le_s (If Desired) In upflow position with side return inlet(s), leveling legs may be

used. (See Fig. 10.) Install field-supplied, 5/16 x 1-1/2 in. (8 x 38 ram) (max) corrosion-resistant machine bolts, washers and

nuts. NOTE: Bottom closure must be used when leveling legs are

used. It may be necessary to remove and reinstall bottom closure panel to install leveling legs. To remove bottom closure panel, see item 1 in Bottom Return Air Inlet section in Step 1 above.

To install leveling legs:

1. Position furnace on its back. Locate and drill a hole in each bottom corner of furnace. (See Fig. 10.)

2. For each leg, install nut on bolt and then install bolt and nut in hole. (Install flat washer if desired.)

3. Install another nut on other side of furnace base. (Install flat washer if desired.)

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

5. Reinstall bottom closure panel if removed.

(8ram)

DOWNFLOW INSTALLATION NOTE: For downflow applications, this furnace is approved for

use on combustible fooring when any one of the following 3 accessories are used:

• Special Base, KGASB

• Cased Coil Assembly Part No. CNPV, CNRV, CAP, and CAR

• Coil Box Part No. KCAKC

1. Deternfine application being installed from Table 4.

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

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

4. If downflow subbase, KGASB is used, install as shown in Fig. 12. If Coil Assembly Part No. CNPV, CNRV, CAP,

CAR or Coil Box Part No. KCAKC is used, install as shown in Fig. 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 box. To remove the supply-air duct flange, use wide duct pliers or hand seamers to bend flange back and forth until it breaks off. Be

careful of sharp edges. (See Fig. 14.) Bottom Return Air Inlet

These furnaces are shipped with bottom closure panel installed in bottom return-air opening. Remove and discard this panel when

bottom return air is used. To remove bottom closure panel, perform the following:

1. Tilt or raise furnace and remove 2 screws holding bottom filler panel. (See Fig. 9.)

2. Rotate bottom filler panel downward to release holding

tabs.

3. Remove bottom closure panel.

4. Reinstall bottom filler panel and screws.

HORIZONTAL INSTALLATION 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.

1 3/4

(44ram)

(8ram)

5/16"

(44mm) 1 3/4"

(44mm) 1

Fig. 10 - Leveling Legs

1 3/4"

(44ram)

(8ram)

A89014

FIRE, EXPLOSION, AND CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in personal iniury, death, or property damage.

Do not install the furnace on its back or hang furnace with control compartment facing downward. Safety control operation will be adversely affected. Never connect

return-air ducts to the back of the furnace.

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

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

16.) Secure angle iron to bottom of furnace as shown. Heavy-gauge sheet metal straps (plumber's straps) may be used to suspend the furnace from each bottom corner. To prevent

screws from pulling out, use 2 #8 x 3/4-in. (19 ram) screw into the side and 2 #8 x 3/4-in. (19 ram) screw in the bottom of the

furnace casing for each strap. (See Fig. 15 and 16 0 If the screws are attached to ONLY the furnace sides and not the

bottom, the straps nmst be vertical against the furnace sides and not pull away from the furnace sides, so that the strap attachment

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

Platform Furnace Support

Construct working platform at location where all required furnace clearances are met. (See Fig. 2 and 17.) For furnaces with 1-in.

(25 ram) clearance requirement on side, set furnace on non-combustible blocks, bricks or angle iron. For crawlspace 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 n_ininmm 17-3/4-in. x 22-in. (451 x 559 ram) piece of sheet metal for flame roll-out protection in front of burner area

for furnaces closer than 12 inches (305 ram) above the combustible deck or suspended furnaces closer than 12 inches

(305 ram) to joists. The sheet metal MUST extend underneath the furnace casing by 1 in. (25 ram) with the door removed.

The bottom closure panel on furnaces of widths 17-1/2 in. (445 ram) and larger may be used for flame roll-out protection when bottom of furnace is used for return air connection. See Fig. 17.

for proper orientation of roll-out shield. Bottom Return Air Inlet

These furnaces are shipped with bottom closure panel installed in bottom return-air opening. Remove and discard this panel when

bottom return air is used. To remove bottom closure panel, perform the following:

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

filler panel. (See Fig. 9.)

2. Rotate bottom filler panel downward to release holding

tabs.

3. Remove bottom closure panel.

4. Reinstall bottom filler panel and screws.

Side Return Air Inlet These furnaces are shipped with bottom closure panel installed in

bottom return-air opening. This panel MUST be in place when side return air inlet(s) are used without a bottom return air inlet,

FURNACE

(OR COIL CASING

WHEN USED)

COMBUSTIBLE

FLOORING

SUBBASE

SHEET METAL

PLENUM

FLOOR

OPENING

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

Combustible Floor

FURNACE

APPROVED

COIL ASSEMBLY

COIL BOX

A96285

Fig. 11 - Floor and Plenum Opening Dimensions

A96283

_ COMBUSTIBLE

FLOORING "_

SHEET METAL _

PLENUM

FLOOR

OPENING

A08556

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

Installed on a Combustible Floor

Table 4 - Opening dimensions - In. (mm)

FURNACE

CASING

APPLICATION

WIDTH

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

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

14-3/16 Downflow applications on combustible flooring (KGASB sub- 11 - 18/16 19 18- 7/16 20- 5/8

(376) base required) (284) (483) (341) (600)

Downflow Applications on Combustible Flooring with CNPV,

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

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

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

17-1/2 Downflow applications on combustible flooring (KGAS B su b- 15-1/8 19 16-3/4 20-5/8

(445) base required) (384) (483) (425) (600)

Downflow Applications on Combustible Flooring with CNPV,

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

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

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

21 Downflow applications on combustible flooring (KGASB sub- 18-5/8 19 20-1/4 20-5/8

(533) base required) (473) (483) (514) (600)

Downflow Applications on Combustible Flooring with CNPV,

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

Upflow Applications on Combustible or Noncombustible Floor- 23 21 - 1/8 28- 5/8 22-1/4

Downflow Applications on Noncombustible Flooring (KGASB 22-7/8 19 28-1/2 19-5/8

24-1/2 Downflow applications on Combustible flooring (KGAS B sub- 22-1/8 19 28- 3/4 20-5/8

(622) base required) (562) (483) (603) (600)

Downflow Applications on Combustible Flooring with CNPV,

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

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

subbase not required) (819) (483) (335) (498)

(KGASB subbase not required) (819) (483) (338) (508)

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

subbase not required) (403) (483) (419) (498)

(KGASB subbase not required) (394) (483) (419) (508)

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

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

(KGASB subbase not required) (483) (483) (508) (508)

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

subbase not required) (581) (483) (597) (498)

(KGASB subbase not required) (572) (483) (597) (508)

PLENUM OPENING FLOOR OPENING

A B C D

12-5/16 19 13-5/16 20

15-1/2 19 16-1/2 20

19 19 20 20

22-1/2 19 28-1/2 20

U PFLOW DOWN FLOW HO REZO NTAL

[......

YES

NO NO

120°_ MIN

YES

YES 120°_ YES 120°_ YES

/\ /\

MIN MIN

Fig. 14 - Duct Flanges

YES

A02020

UTER DOOF

ASSEMBLY

8" (203mm) MIN FOR DOOR REMOVAL

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

1/4'1 (6mm) THREADED ROD

4 REQ.

SECURE ANGLE IRON TO BOTTOM OF FURNACE WITH

3 #8 xS/4'' (19ram) SCREWS TYPICAL FOR 2 SUPPORTS

1" (25mm) SQUARE, 1-1/4"xt-1/4"xl/8" (32x32x3mm)

ANGLE IRON OR UNI-STRUT MAY BE USED

OUTER DOOR ASSEMB_

A10130

Fig. 15 - Horizontal Unit Suspension

22 GAUGE GALVANIZED STRAPS TYPICAL

FOR 4 STRAPS

AIR

METHOD 2

BACK OF FURNACE

METHOD 1 FOLD ALL STRAPS UNDER FURNACE AND SECURE WTH

(4) #8 x 3/4 (t9 ram) SHEET METAL SCREWS (2 SCREWS IN SIDE AND 2SCREWS

IN BOTTOM).

USE (4) #8 x 3/4 (19 ram) SHEET METAL SCREWS FOR EACH STRAR THE STRAPS

SHOULD BE VERTICAL AGAINST THE FURNACE SIDES AND NOT PULL AWAY FROM THE FURNACE SIDES.

Fig. 16 - Horizontal Suspension with Straps

A10131

LINECONTACTONLYPERMISSIBLEBETWEEN

LINESFORMEDBYINTERSECTIONSOF THETOPANDTWOSIDESOFTHEFURNACE JACKETANDBUILDINGJOISTS,

STUDS,ORFRAMING.

EQUIPMENT MANUAL

SHUT-OFF GAS VALVE

SEDIMENT

TRAP

UNION

ENTRY

Fig. 17 - Typical Attic Installation

VENT

_0-1N.(762mm)

MIN WORK AREA

173/4" (451 mm)OVERALL

4 3/4" (121mm) UNDER DOOR 1" (25mm) UNDER FURNACE

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

*WHEN USED WITH

SINGLE WALL VENT CONNECTIONS

A10164

Not all horizontal furnaces are approved for side return air connections. (See Fig. 20.) FILTER ARRANGEMENT

CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in personal iniury, 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 rack 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 ternfinating 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 transnfission of vibration.

Ductwork passing through unconditioned space should be insulated to enhance system performance. When air conditioning

is used, a vapor barrier is recommended. Maintain a 1-in. (25 ram) clearance from combustible materials

to supply air ductwork for a distance of 36 in. (914 ram) 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 ° elbow and 10

ft. (3 M) of main duct to the first branch take-off may require internal acoustical lining. As an alternative, fibrous ductwork may

be used if constructed and installed in accordance with the latest edition of SMACNA construction standard on fibrous glass

ducts. Both acoustical lining and fibrous ductwork shall comply with NFPA 90B as tested by UL Standard 181 for Class 1 Rigid

air ducts. Supply Air Connections

For a furnace not equipped with a cooling coil, the outlet duct shall be provided with a removable access panel. This opening

shall be accessible when the furnace is installed and shall be of such a size that the heat exchanger can be viewed for possible

openings using light assistance or a probe can be inserted for sampling the air stream. The cover attachment shall prevent leaks.

Upflow and Horizontal Furnaces

Connect supply-air duct to flanges on furnace supply-air outlet. Bend flange upward to 90 ° with wide duct pliers. (See Fig. 14.) The supply-air duct must be connected to ONLY the furnace

supply-outlet-air duct flanges or air conditioning coil casing (when used). DO NOT cut main furnace casing side to attach

supply air duct, hunfidifier, or other accessories. All accessories MUST be connected to duct external to furnace main casing.

NOTE: For horizontal applications, the top-most flange may be bent past 90 ° to allow the evaporator coil to hang on the flange temporarily while the remaining attachment and sealing of the coil are performed.

Table5 - Air Delivery - CFM (With Filter)*

FURNACE

SIZE

045- 08 /

024045

045-12/

036045

070-081 /

024070

070-12/

036070

070-16/

048070

090-14/

042090

090-16/

048090

090- 20/

060090

110-12/

036110

110-16/

048110

110-22/ Bottom Sides or

066110 1 Side & Bottom

*A filter is required for each return-air inlet. Airflow performance included 3/4-in. (19 mm) washable filter media such as contained in factory-authorized ac- cessory filter rack. To determine airflow performance without this filter, assume an additional 0.1 In. W.C. available external static pressure.

-- Indicates unstable operating conditions.

RETURN-AIR

INLET

Bottom or

Side(s)

Bottom or

Side(s)

Bottom or

Side(s)

Bottom or

Side(s)

Bottom or

Side(s)

Bottom or

Side(s)

Bottom or

Side(s)

Bottom Only

Both Side or 1 Side & Bottom

1Side Only

Bottom or

Side(s)

Bottom or

Side(s)

Bottom Only

1Side Only

SPEED

High 1120 1075 1020 960 895 815 720 605 455 340

Med - High 930 890 850 805 750 680 600 500 345 195

Med - Low 820 785 750 700 650 585 505 400 235 - -

Low 725 690 655 605 555 495 405 305 ....

High 1465 1400 1325 1250 1175 1085 980 860 725 560

Med - High 1295 1260 1210 1155 1090 1015 930 830 700 545

Medium 1150 1120 1085 1040 985 920 835 740 620 510

Med - Low 1030 1010 980 945 895 835 765 685 570 345

Low 860 835 810 780 745 700 635 555 445 260

High 1140 1105 1055 1010 955 885 815 715 545 390

Med - High 915 885 855 825 785 725 655 530 420 280

Med - Low 795 770 740 700 655 600 510 420 325 - -

Low 690 665 630 590 550 475 415 340 245 - -

High 1440 1400 1355 1300 1240 1170 1090 1000 890 745

Med - High 1180 1165 1150 1125 1085 1030 970 890 785 645

Medium 1015 1020 1010 990 965 925 875 800 700 560

Med - Low 885 885 880 865 845 815 770 700 605 475

Low 695 700 700 690 670 640 600 540 460 345

High 1840 1790 1730 1670 1605 1530 1450 1370 1275 1170

Med - High 1610 1575 1535 1485 1435 1370 1305 1230 1145 1055

Medium 1460 1430 1400 1360 1315 1260 1205 1130 1055 965

Med - Low 1260 1240 1215 1180 1145 110 1040 985 915 835

Low 1065 1040 1015 985 955 915 875 825 765 695

High 1650 1600 1535 1465 1385 1285 1175 1055 895 645

Med - High 1515 1485 1440 1380 1300 1220 1115 990 830 600

Med - Low 1385 1360 1320 1260 1195 1120 1025 915 710 565

Low 1205 1180 1160 1120 1065 1005 925 810 630 510

High 1710 1695 1665 1585 1480 1390 1245 1110 955 775

Med - High 1470 1475 1450 1390 1335 1230 1120 1005 855 690

Med - Low

Low

High 2380 2295 2205 2105 2005 1900 1775 1650 1510 1335

Med - High 2185 2115 2045 1960 1875 1770 1655 1535 1400 1240

Medium 1905 1865 1815 1740 1670 1590 1490 1390 1245 1110

Med - Low 1595 1565 1530 1485 1430 1355 1275 1160 1055 920

Low 1340 1310 1280 1225 1170 1120 1040 955 850 750

High 2485 2415 2330 2230 2135 2030 1920 1790 1645 1485

Med- High 2175 2130 2070 2000 1930 1840 1740 1620 1495 1345

Medium 1845 1815 1770 1720 1655 1580 1500 1395 1270 1090

Med - Low 1540 1515 1475 1435 1385 1335 1270 1175 1045 915

Low 1280 1250 1220 1190 115 1105 1035 945 845 745

High 2420 2345 2265 2165 2070 1960 1850 1720 1570 1420

Med - High 2160 2110 2045 1960 1885 1790 1695 1570 1445 1305

Medium 1850 1815 1765 1710 1635 1560 1480 1380 1250 1110

Med - Low 1530 1490 1455 1420 1375 1320 1250 1160 1055 905

Low 1290 1250 1220 1190 115 1110 1040 950 835 740

High 1625 1575 1515 1445 1355 1260 1165 990 785 595

Med - High 1510 1470 1415 1355 1285 1185 1070 890 725 530

Med - Low 1360 1335 1295 1250 1180 11 O0 985 810 670 475

Low 1195 1180 1155 1115 1065 980 860 740 605 410

High 2055 1990 1910 1815 1695 1575 1425 1230 1090 910

Med - High 1750 1725 1670 1605 1515 1400 1255 1120 975 785

Medium 1545 1525 1490 1445 1355 1260 1135 1020 880 750

Med - Low 1300 1290 1275 1235 1165 1085 1005 895 750 620

Low 1050 1045 1015 975 935 880 815 715 610 515

High 2530 2460 2380 2285 2200 2085 1970 1835 1695 1545

Med-High 2225 2190 2135 2075 1995 1910 1805 1695 1565 1430

Medium 1895 1885 1865 1820 1770 1700 1610 1520 1410 1290

Med - Low 1565 1555 1535 1505 1465 1410 1350 1265 1175 1050

Low 1320 1295 1265 1235 1205 1160 1105 1035 950 870

High .... 2415 2330 2235 2125 1995 1860 1735 1605

Med- High 2205 2175 2120 2065 1975 1900 1790 1685 1580 1460

High 2485 2430 2360 2270 2175 2070 1950 1825 1685 1535

Med-High 2155 2135 2100 2040 1970 1885 1790 1680 1560 1420

Medium 1830 1830 1810 1780 1730 1665 1595 1505 1395 1275

Med - Low 1520 1505 1490 1470 1430 1385 1330 1250 1165 1055

Low 1275 1260 1240 1210 1180 1135 1090 1025 930 840

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

2060 2000 1930 1835 1755 1620 1490 1315 1115 910

1260 1365 1245 1225 1165 1090 995 880 750 600 1030 1025 1020 990 940 890 810 720 615 500

EXTERNAL STATIC PRESSURE (IN. W.C.)

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

FURNACE RETURN-AIR EXTERNAL STATIC PRESSURE (IN. W.C.)

SIZE INLET 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

Bottom High 2090 2010 1930 1835 1710 1590 1470 1335 1025 835

135-16/ or Med-High 1790 1755 1705 1640 1550 1465 1360 1210 945 785

048135 Med - Low 1545 1525 1500 1450 1380 1315 1215 1005 855 670

135-22/ or Med-High 2180 2145 2060 2010 1945 1865 1765 1660 1515 1325

066135 Med - Low 1880 1850 1820 1780 1715 1635 1540 1415 1290 1160

155- 20/

060155 .... 2375 2285 2200 2105 1995 1870 1730 1570

-- Indicates unstable operating conditions.

Downflow Furnaces

Connect supply-air duct to supply-air outlet on furnace. Bend flange inward past 90 ° with wide duct pliers. (See Fig. 14.) The

supply-air duct must be connected to ONLY the furnace supplyoutlet or air conditioning coil casing (when used). When

installed on combustible material, supply-air duct must be connected to ONLY the factory-approved accessory subbase, or

a factory approved air conditioning coil casing. DO NOT cut main furnace casing to attach supply side air duct, humidifier, or

other accessories. All accessories MUST be connected to duct external to furnace casing.

Return Air Connections

Side(s) Low 1325 1320 1295 1265 1210 1150 995 865 745 540

Bottom Med- High 2195 2150 2090 2000 1920 1825 1720 1565 1405 1255

Only Med - Low 1880 1850 1820 1780 1715 1635 1540 1415 1290 1160

Bottom Sides High .... 2385 2305 2195 2085 1960 1825 1670 1465

1 Side & Bottom

1 Side Only Med-High 2125 2065 1995 1910 1815 1710 1610 1490 1340 1175

Bottom Only

BothSides Or I

Side& Bottom

1 Side Only 2140 2095 2040 1975 1890 1810 1705 1595 1480 1325

SPEED

High 2485 2400 2310 2215 2110 2000 1880 1725 1535 1355

Low 1640 1635 1615 1585 1530 1465 1370 1255 1150 1040

High 2320 2250 2155 2055 1970 1855 1725 1600 1450 1280

Med - Low

Low

High

Med-High

Med - Low

Low

High

Med-High

High

Med-High

1845 1825 1765 1710 1650 1570 1475 1370 1240 11 O0 1640 1620 1580 1540 1485 1410 1330 1220 1080 960

2465 2430 2375 2305 2230 2110 2000 1865 1725 2115 2105 2075 2030 1980 1910 1830 1725 1590 1425 1800 1790 1770 1735 1695 1640 1570 1465 1345 1225 1570 1565 1550 1525 1495 1445 1370 1270 1175 1070

2155 2135 2095 2040 1975 1895 1790 1685 1550 1400

.... 2260 2180 2085 1975 1865 1740 1605 1455

GAS PIPING

FIRE OR EXPLOSION HAZARD

Failure to follow this warning could result in personal iniury, 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.

1545

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. Follow instructions below.

Downflow Furnaces

The return-air duct must be connected to return-air opening (bottom inlet) as shown in Fig. 1. DO NOT cut into casing sides (left or right). Side opening is permitted for only upflow and most

horizontal furnaces. Bypass humidifier connections should be made at ductwork or coil casing sides exterior to furnace. (See

Fig. 19.)

Upflow and Horizontal Furnaces

The return-air duct must be connected to bottom, sides (left or right), or a combination of bottom and side(s) of main furnace casing as shown in Fig. 1. Bypass humidifier may be attached

into unused return air side of the furnace casing. (See Fig. 18 and

20.) Not all horizontal furnaces are approved for side return air connections, (See Fig. 20.)

FIRE OR EXPLOSION HAZARD Failure to follow this warning could result in personal

iniury, death, and/or property damage. Use proper length of pipe to avoid stress on gas control

manifold and a gas leak.

FIRE OR EXPLOSION HAZARD Failure to protect gas valve inlet from water and debris

could result in death, personal iniury and/or property damage.

Gas valve inlet and/or inlet pipe must remain capped until gas supply line is permanently installed to protect the valve from moisture and debris. Also, install a sediment trap in the gas supply piping at the inlet to the gas valve.

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