installation, start--up operating and service and ... · installation, start--up operating and...

Installation, Start--Up Operating andService and Maintenance Instructions

Series G

310AAV/JAVSINGLE--STAGE DELUXE, INDUCED--COMBUSTION4--WAY MULTIPOISE GAS FURNACE

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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


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

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

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


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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

PARTS REPLACEMENT INFORMATION GUIDE 51. . . . . . .

Always Ask For

Use of the AHRI Certified TM Mark indicates amanufacturer’s participation in the program. Forverification of certification for individual products,go to www.ahridirectory.org.

NOTE: Read the entire instruction manual before starting theinstallation.

Portions of the text and tables are reprinted from NFPA 54/ANSIZ223.1--2012E, with permission of Nation Fire ProtectionAssociation, Quincy, MA 02269 and American Gas Association,Washington DC 20001. This reprinted material is not thecomplete and official position of the NFPA or ANSI on thereferenced subject, which is represented only by the standard inits entirely.

2

SAFETY CONSIDERATIONS

FIRE, EXPLOSION, ELECTRICAL SHOCK, ANDCARBON MONOXIDE POISONING HAZARD

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

Improper installation, adjustment, alteration, service,maintenance, or use can cause carbon monoxide poisoning,explosion, fire, electrical shock, or other conditions whichmay cause personal injury or property damage. Consult aqualified service agency, local gas supplier, or yourdistributor or branch for information or assistance. Thequalified service agency must use only factory--authorizedand listed kits or accessories when modifying this product.

! WARNING

FURNACE RELIABILITY HAZARD

Failure to follow this caution may result in unit componentdamage.

Application of this furnace should be indoors with specialattention given to vent sizing and material, gas input rate,air temperature rise, unit leveling, and unit sizing.

CAUTION!

CUT HAZARD

Failure to follow this caution may result in personal injury.

Sheet metal parts may have sharp edges or burrs. Use careand wear appropriate protective clothing, safety glasses andgloves when handling parts, and servicing furnaces.

CAUTION!

Improper installation, adjustment, alteration, service,maintenance, or use can cause explosion, fire, electrical shock, orother conditions which may cause death, personal injury, orproperty damage. Consult a qualified installer, service agency, oryour distributor or branch for information or assistance. Thequalified installer or agency must use factory--authorized kits oraccessories when modifying this product. Refer to the individualinstructions 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 theseinstructions thoroughly and follow all warnings or cautionsinclude in literature and attached to the unit. Consult localbuilding codes, the current editions of the National Fuel GasCode (NFGC) NFPA 54/ANSI Z223.1 and the NationalElectrical Code (NEC) NFPA 70.

Recognize safety information. This is the safety--alert symbol .When you see this symbol on the unit and in instructions ormanuals, be alert to the potential for personal injury.

Understand the signal words DANGER, WARNING, andCAUTION. These words are used with the safety--alert symbol.DANGER identifies the most serious hazards which will result insevere personal injury or death. WARNING signifies hazards

which could result in personal injury or death. CAUTION isused to identify unsafe practices which may result in minorpersonal injury or product and property damage. NOTE is usedto highlight suggestions which will result in enhancedinstallation, reliability, or operation.

1. Use only with type of gas approved for this furnace. Referto 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 thefurnace space as specified in “Air for Combustion andVentilation” section.

4. Combustion products must be discharged outdoors. Con-nect this furnace to an approved vent system only, as spe-cified in the “Venting” section of these instructions.

5. Never test for gas leaks with an open flame. Use a com-mercially available soap solution made specifically for thedetection of leaks to check all connections, as specified inthe “Gas Piping” section.

6. Always install furnace to operate within the furnace’s in-tended temperature--rise range with a duct system whichhas an external static pressure within the allowable range,as specified in the “Start--Up, Adjustments, and SafetyCheck” section. See furnace rating plate.

7. When a furnace is installed so that supply ducts carry aircirculated by the furnace to areas outside the space con-taining the furnace, the return air shall also be handled byduct(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 garagemust be installed as specified in the warning box in the“Location” section.

9. The furnace may be used for construction heat providedthat the furnace installation and operation complies withthe first CAUTION in the LOCATION section of these in-structions.

10. These Multipoise Gas--Fired Furnaces are CSA (formerlyA.G.A. and C.G.A.) design--certified for use with naturaland propane gases (see furnace rating plate) and for install-ation in alcoves, attics, basements, closets, utility rooms,crawlspaces, and garages. The furnace is factory--shippedfor use with natural gas. A CSA (A.G.A. and C.G.A.) lis-ted accessory gas conversion kit is required to convert fur-nace for use with propane gas.

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

12. Maintain a 1--in. (25 mm) clearance from combustible ma-terials to supply air ductwork for a distance of 36 in. (914mm) horizontally from the furnace. See NFPA 90B or loc-al code for further requirements.

13. These furnaces SHALL NOT be installed directly on car-peting, tile, or any other combustible material other thanwood 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’sCoil Assembly Part No. CNPV, CNRV, CAR or CAP orwhen Coil Box Part No. KCAKC is used. See Fig. 1 forclearance to combustible construction information.

310AAV

3

AA

B

[736.9][736.9]2929

Ø7/8Ø7/8[22.2][22.2]

ACCESSORYACCESSORY

5 15/165 15/16[150.7][150.7]

28.3928.39[721.2][721.2]

Ø7/8Ø7/8[22.2][22.2]

ACCESSORYACCESSORY

14 7/814 7/8[337.3][337.3]

(BOTH SIDES)(BOTH SIDES)Ø7/8Ø7/8[22.2][22.2]ACCESSORYACCESSORY

Ø7/8Ø7/8[22.2][22.2]

ACCESSORYACCESSORY

Ø1 3/4Ø1 3/4[44.5][44.5]GAS ENTRYGAS ENTRY

Ø1/2Ø1/2[12.7][12.7]THERMOSTAT WIRE ENTRYTHERMOSTAT WIRE ENTRY

22 1/1622 1/16[560][560]

SIDE INLETSIDE INLET(BOTH SIDES)(BOTH SIDES)

11 7/1611 7/16[290.7][290.7]

9 11/169 11/16[245.4][245.4][197.8][197.8]

7 13/167 13/16

Ø7/8Ø7/8[22.2][22.2]

J.BOX PROVISIONJ.BOX PROVISION

Ø7/8Ø7/8[22.2][22.2]JUNCTION BOXJUNCTION BOXLOCATIONLOCATION

Ø1 3/4Ø1 3/4[44.5][44.5]GAS ENTRYGAS ENTRY

1 15/161 15/16[49.2][49.2]

1[25.4][25.4]

1 1/41 1/4[31.8][31.8]

29 9/1629 9/16[750.7][750.7]

1 15/161 15/16[49.2][49.2]

5 5/85 5/8[143.3][143.3]

5 7/165 7/16[138.5][138.5]

6 13/166 13/16[172.3][172.3]

Ø1/2Ø1/2[12.7][12.7]

THERMOSTAT WIRE ENTRYTHERMOSTAT WIRE ENTRY

1919[481.7][481.7]

OUTLETOUTLET

D21.621.6[549.5][549.5]

BOTTOM INLETBOTTOM INLET

C

33 1/433 1/4[843.9][843.9]

9 9/169 9/16[243.3][243.3]

3/43/4[19.1][19.1]

5 7/85 7/8[148.5][148.5]

3 7/163 7/16[86.8][86.8]

9 7/89 7/8[250.7][250.7]

27 3/427 3/4[704.7][704.7]

2 5/162 5/16[59][59]

FRO

NT

OF

CASI

NG

FRO

NT

OF

CASI

NG

TOP OF CASINGTOP OF CASING4 13/164 13/16[122.2][122.2]

27 3/427 3/4[704.7][704.7]

5 7/85 7/8[148.5][148.5]

8 5/88 5/8[219][219]

5 1/25 1/2[140.3][140.3]

8 7/168 7/16[213.5][213.5]

FRO

NT

OF

CASI

NG

FRO

NT

OF

CASI

NG

TOP OF CASINGTOP OF CASING

6.16.1[155.7][155.7]

2 1/162 1/16[51.6][51.6]

5.15.1[130.5][130.5]

1.71.7[43.5][43.5]

Ø7/8Ø7/8[22.2][22.2]ACCESSORY (2)ACCESSORY (2)

AIR FLOWAIR FLOW

AIR FLOWAIR FLOW

BOTTOM RETURNBOTTOM RETURNWIDTHWIDTH

AIR FLOWAIR FLOW

KNOCK OUTS FORKNOCK OUTS FORVENTING(5 VENTING(5 PLACES)PLACES)

A10290

NOTES:1. Two additional 7/8---in. (22 mm) diameter holes are located in the top plate.2. Minimum return ---air openings at furnace, based on metal duct. If flex duct is used, see flex duct manufacturer’s recommendations for equivalent diameters.

(a.) For 800 CFM---16---in. (406 mm) round or 14 1/2 x 12---in. (368 x 305 mm) rectangle.(b.) For 1200 CFM---20---in. (508 mm) round or 14 1/2 x 19 1/2---in. (368 x 495 mm) rectangle.(c.) For 1600 CFM---22---in. (559 mm) round or 14 1/2 x 22 1/16---in. (368 x 560mm) rectangle.(d.) For airflow requirements above 1800 CFM, see Air Delivery table in Product Data literature for specific use of single side inlets. The use of both sideinlets, a combination of 1 side and the bottom, or the bottom only will ensure adequate return air openings for airflow requirements above 1800 CFM.

FURNACE SIZE ACABINETWIDTH

BOUTLETWIDTH

CTOP & BOTTOMFLUE COLLARLOCATION

DBOTTOM

INLET WIDTH

VENTCONNECTION

SIZE

SHIP WTLB (KG)

045---08/024045 14---3/16 (360) 12---9/16 (319) 9---5/16 (237) 12---11/16 (322) 4 (102) 104 (47)045---12/036045 14---3/16 (360) 12---9/16 (319) 9---5/16 (237) 12---11/16 (322) 4 (102) 107 (49)070---08/024070 14---3/16 (360) 12---9/16 (319) 9---5/16 (237) 12---11/16 (322) 4 (102) 111 (50)070---12/036070 14---3/16 (360) 12---9/16 (319) 9---5/16 (237) 12---11/16 (322) 4 (102) 115 (52)070---16/048070 17---1/2 (445) 15---7/8 (403) 11---9/16 (294) 16 (406) 4 (102) 126 (57)090---14/042090 17---1/2 (445) 15---7/8 (403) 11---9/16 (294) 16 (406) 4 (102) 127 (58)090---16/048090 21 (533) 19---3/8 (492) 13---5/16 (338) 19---1/2 (495) 4 (102) 140 (64)090---20/060090 21 (533) 19---3/8 (492) 13---5/16 (338) 19---1/2 (495) 4 (102) 146 (66)110---12/036110 17---1/2 (445) 15---7/8 (403) 11---9/16 (294) 16 (406) 4 (102) 135 (61)110---16/048110 21 (533) 19---3/8 (492) 13---5/16 (338) 19---1/2 (495) 4 (102) 146 (66)110---22/066110 21 (533) 19---3/8 (492) 13---5/16 (338) 19---1/2 (495) 4 (102) 152 (69)135---16/048135 21 (533) 19---3/8 (492) 13---5/16 (338) 19---1/2 (495) 4 (102)* 149 (68)135---22/066135 24---1/2 (622) 22---7/8 (581) 15---1/16 (383) 23 (584) 4 (102)* 163 (74)155---20/060155 24---1/2 (622) 22---7/8 (581) 15---1/16 (383) 23 (584) 4 (102)* 170 (77)*135 and 155 size furnaces require a 5 or 6---in. (127 or 152 mm) vent. Use a vent adapter between furnace and vent stack. See Installation Instructions forcomplete installation requirements.

Fig. 1 --- Dimensional Drawing

310AAV

4

A10269

Fig. 2 --- Clearances to Combustibles

60

80 / 27 C

/ 16 C

A06745

Fig. 3 --- Return Air Temperature

INTRODUCTIONThis 4--way multipoise Category I fan--assisted furnace is CSAdesign--certified. A Category I fan--assisted furnace is anappliance equipped with an integral mechanical means to eitherdraw or force products of combustion through the combustion

chamber and/or heat exchanger. The furnace is factory--shippedfor use with natural gas. This furnace is not approved forinstallation in mobile homes, recreational vehicles, or outdoors.

This furnace is designed for minimum continuous return--airtemperature of 60_F (16_C) db or intermittent operation down to55_F (13_C) db such as when used with a night setbackthermostat. Return--air temperature must not exceed 80_F (27_C)db. Failure to follow these return--air temperature limits mayaffect reliability of heat exchangers, motors, and controls. (SeeFig. 3.)

For accessory installation details, refer to the applicableinstruction literature.

NOTE: Remove all shipping brackets and materials beforeoperating the furnace.

CODES AND STANDARDSFollow all national and local codes and standards in additionto these instructions. The installation must comply withregulations of the serving gas supplier, local building, heating,plumbing, and other codes. In absence of local codes, theinstallation must comply with the national codes listed below andall authorities having jurisdiction. In the United States , follow allcodes and standards for the following:

Step 1—Safety

310AAV

5

S National Fuel Gas Code (NFGC) NFPA 54--2012/AN-SI Z223.1--2012 and the Installation Standards, WarmAir Heating and Air Conditioning Systems ANSI/NFPA 90B

Step 2—General InstallationS Current edition of the NFGC and the NFPA 90B. For

copies, contact the National Fire Protection AssociationInc., Batterymarch Park, Quincy, MA 02269;(www.NFPA.org) or for only the NFGC, contact theAmerican Gas Association, 400 N. Capitol Street,N.W., Washington, DC 20001 (www.AGA.org).

Step 3—Combustion and Ventilation AirS Section 9.3 of the NFGC, NFPA 54 / ANSI

Z223.1--2012 Air for Combustion and Ventilation

Step 4—Duct SystemsS Air Conditioning Contractors Association (ACCA)

Manual D, Sheet Metal and Air Conditioning Contract-ors National Association (SMACNA), or AmericanSociety of Heating, Refrigeration, and Air Condition-ing Engineers (ASHRAE) 2001 Fundamentals Hand-book Chapter 34 or 2000 HVAC Systems and Equip-ment Handbook Chapters 9 and 16.

Step 5—Acoustical Lining and Fibrous GlassDuct

S Current edition of SMACNA and NFPA 90B as testedby UL Standard 181 for Class I Rigid Air Ducts

Step 6—Gas Piping and Gas Pipe PressureTesting

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

Step 7—Electrical ConnectionsS National Electrical Code (NEC) ANSI/NFPA 70--2011

Step 8—VentingS NFGC NFPA 54 / ANSI Z223.1--2012; chapters 12

and 13

ELECTROSTATIC DISCHARGE (ESD)PRECAUTIONS PROCEDURE

FURNACE RELIABILITY HAZARD

Failure to follow this caution may result in furnacecomponent damage.

Electrostatic discharge can affect electronic components.Follow the Electrostatic Discharge Precautions Procedurelisted below during furnace installation and servicing toprotect the furnace electronic control. Precautions willprevent electrostatic discharges from personnel and handtools which are held during the procedure. Theseprecautions will help to avoid exposing the control toelectrostatic discharge by putting the furnace, the control,and the person at the same electrostatic potential.

CAUTION!

1. Disconnect all power to the furnace. Multiple disconnectsmay be required. DO NOT TOUCH THE CONTROL OR

ANY WIRE CONNECTED TO THE CONTROL PRIORTO DISCHARGING YOUR BODY’SELECTROSTATIC 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 aperson’s hand during grounding will be satisfactorily dis-charged.

3. After touching the chassis, you may proceed to service thecontrol or connecting wires as long as you do nothing torecharge your body with static electricity (for example;DO NOT move or shuffle your feet, do not touch un-grounded objects, etc.).

4. If you touch ungrounded objects (and recharge your bodywith static electricity), firmly touch a clean, unpaintedmetal surface of the furnace again before touching controlor 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 beforebringing the control or yourself in contact with the fur-nace. Put all used and new controls into containers beforetouching ungrounded objects.

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

LOCATION

CARBON MONOXIDE POISONING AND UNITDAMAGE HAZARD

Failure to follow this warning could result in personalinjury or death, and unit component damage.

Corrosive or contaminated air may cause failure of partscontaining flue gas, which could leak into the living space.Air for combustion must not be contaminated by halogencompounds, which include fluoride, chloride, bromide, andiodide. These elements can corrode heat exchangers andshorten furnace life. Air contaminants are found in aerosolsprays, detergents, bleaches, cleaning solvents, salts, airfresheners, and other household products. Do not installfurnace in a corrosive or contaminated atmosphere. Makesure all combustion and circulating air requirements are met,in addition to all local codes and ordinances.

! WARNING

GENERAL

This multipoise furnace is shipped in packaged configuration.Some assembly and modifications are required when used in anyof the four applications shown in Fig. 4.

This furnace must:

S be installed so the electrical components are protectedfrom water.

S not be installed directly on any combustible materialother than wood flooring for upflow applications.Downflow installations require use of a factory--ap-proved floor base or coil assembly when installed oncombustible materials or wood flooring. (Refer toSAFETY CONSIDERATIONS).

310AAV

6

THE BLOWER IS LOCATEDTO THE RIGHT OF THE

BURNER SECTION, ANDAIR CONDITIONED AIR IS

DISCHARGED TO THE LEFT.

THE BLOWER ISLOCATED BELOW THE

BURNER SECTION, ANDCONDITIONED AIR IS

DISCHARGED UPWARD.

THE BLOWER ISLOCATED ABOVE THE

BURNER SECTION, ANDCONDITIONED AIR IS

DISCHARGED DOWNWARD

THE BLOWER ISLOCATED TO THE LEFT

OF THE BURNER SECTION,AND CONDITIONED AIR IS

DISCHARGED TO THE RIGHT.

A02097

Fig. 4 --- Multipoise Orientations

S be located as close to the chimney or vent and attachedto an air distribution system. Refer to Air Ducts section.

S be provided ample space for servicing and cleaning.Always comply with minimum fire protection clear-ances shown on the furnace clearance to combustiblelabel.

S The following types of furnace installations may re-quire OUTDOOR AIR for combustion due to chemicalexposures:

S Commercial buildings

S Buildings with indoor pools

S Laundry rooms

S Hobby or craft rooms, and

S Chemical storage areasIf air is exposed to the following substances, it should not be usedfor combustion air, and outdoor air may be required forcombustion:

S Permanent wave solutions

S Chlorinated waxes and cleaners

S Chlorine based swimming pool chemicals

S Water softening chemicals

S De--icing salts or chemicals

S Carbon tetrachloride

S Halogen type refrigerants

S Cleaning solvents (such as perchloroethylene)

S Printing inks, paint removers, varnishes, etc.

S Hydrochloric acid

S Cements and glues

S Antistatic fabric softeners for clothes dryers

S Masonry acid washing materialsAll fuel--burning equipment must be supplied with air for fuelcombustion. Sufficient air must be provided to avoid negativepressure in the equipment room or space. A positive seal must bemade between the furnace cabinet and the return--air duct toprevent pulling air from the burner area and from draft safeguardopening.

FIRE AND EXPLOSION HAZARD

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

When the furnace is installed in a residential garage, theburners and ignition sources must be located at least 18inches above the floor. The furnace must be located orprotected to avoid damage by vehicles. When the furnace isinstalled in a public garage, airplane hangar, or otherbuilding having a hazardous atmosphere, the furnace mustbe installed in accordance with the NFGC. (See Fig. 5.)

! WARNING

310AAV

7

PERSONAL INJURY AND/OR PROPERTYDAMAGE HAZARD

Failure to follow this caution may result in furnacecomponent damage.

This gas furnace may be used for heating buildings underconstruction provided that:

--The furnace is permanently installed with all electricalwiring, piping, venting and ducting installed according tothese installation instructions. A return air duct is provided,sealed to the furnace casing, and terminated outside thespace containing the furnace. This prevents a negativepressure condition as created by the circulating air blower,causing a flame rollout and/or drawing combustionproducts into the structure.

--The furnace is controlled by a thermostat. It may not behot wired to provide heat continuously to the structurewithout thermostatic control.

--Clean outside air is provided for combustion. This is tominimize the corrosive effects of adhesives, sealers andother construction materials. It also prevents theentrainment of drywall dust into combustion air, which cancause fouling and plugging of furnace components.

--The temperature of the return air to the furnace ismaintained between 55_F (13_C) and 80_F (27_C), withno evening setback or shutdown. The use of the furnacewhile the structure is under construction is deemed to beintermittent operation per our installation instructions.

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

--The filters used to clean the circulating air during theconstruction process must be either changed or thoroughlycleaned prior to occupancy.

--The furnace, ductwork and filters are cleaned as necessaryto remove drywall dust and construction debris from allHVAC system components after construction is completed.

--Verify proper furnace operating conditions includingignition, gas input rate, air temperature rise, and ventingaccording to these installation instructions.

CAUTION!

18-IN. (457.2 mm) MINIMUM TO BURNERS

A93044

Fig. 5 --- Installation in a Garage

FIRE HAZARD

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

Do not install the furnace on its back or hang furnace withcontrol compartment facing downward. Safety controloperation will be adversely affected. Never connectreturn--air ducts to the back of the furnace. (See Fig. 6.)

! WARNING

A02054

Fig. 6 --- Prohibit Installation on Back

LOCATION RELATIVE TO COOLING EQUIPMENT

The cooling coil must be installed parallel with, or on thedownstream side of the unit to avoid condensation in the heatexchangers. When installed parallel with the furnace, dampers orother flow control must prevent chilled air from entering thefurnace. If the dampers are manually operated, they must beequipped with means to prevent operation of either unit unlessthe damper is in the full--heat or full--cool position.

AIR FOR COMBUSTION ANDVENTILATION

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

S Section 9.3 of the NFPA 54 / ANSI Z223.1--2012, Airfor Combustion and Ventilation, and applicable provi-sions of the local building codes.

FURNACE CORROSION HAZARD

Failure to follow this caution may result in furnace damage.

Air for combustion must not be contaminated by halogencompounds, which include fluoride, chloride, bromide, andiodide. These elements can corrode heat exchangers andshorten furnace life. Air contaminants are found in aerosolsprays, detergents, bleaches, cleaning solvents, salts, airfresheners, and other household products.

CAUTION!

310AAV

8

CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in personalinjury or death.

The operation of exhaust fans, kitchen ventilation fans,clothes dryers, attic exhaust fans or fireplaces could create aNEGATIVE 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 CarbonMonoxide Poisoning Hazard warning in venting section ofthese instructions to determine if an adequate amount ofmake--up air is available.

! WARNING

The requirements for combustion and ventilation air dependupon whether or not the furnace is located in a space having avolume of at least 50 cu/ft. per 1,000 Btuh input rating for all gasappliances installed in the space.

S Spaces having less than 50 cu/ft. per 1,000 Btuh re-quire the OUTDOOR COMBUSTION AIRMETHOD.

S Spaces having at least 50 cu/ft. per 1,000 Btuh may usethe INDOOR COMBUSTION AIR, STANDARD orKNOWN 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) directlycommunicating with the outdoors or spaces that freelycommunicate with the outdoors.

2. Fig. 7 illustrates how to provide TWO OUTDOOROPENINGS, one inlet and one outlet combustion andventilation air opening, to the outdoors.

e. One opening MUST commence within 12 in. (300mm) of the ceiling and the second opening MUSTcommence within 12 in. (300 mm) of the floor.

f. Size openings and ducts per Fig. 7 and Table 1.

g. TWO HORIZONTAL DUCTS require 1 sq./in. of freearea per 2,000 Btuh (1,100 mm2/kW) of combinedinput for all gas appliances in the space per Fig. 7 andTable 1.

h. TWO OPENINGS OR VERTICAL DUCTS require 1sq./in. of free area per 4,000 Btuh (550 mm2/kW) forcombined input of all gas appliances in the space perFig. 7 and Table 1.

3. ONE OUTDOOR OPENING requires:

a. 1 square inch of free area per 3,000 Btuh (734mm2/kW) for combined input of all gas appliances inthe space per Table 1 and

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

The opening shall commence within 12 in. (300 mm) of theceiling. Appliances in the space shall have clearances of at least 1in. (25 mm) from the sides and back and 6 in. (150 mm) from thefront. The opening shall directly communicate with the outdoorsor shall communicate through a vertical or horizontal duct to theoutdoors or spaces (crawl or attic) that freely communicate withthe outdoors.

Indoor Combustion Air NFPA & AGAStandard and Known--Air--Infiltration Rate MethodsIndoor air is permitted for combustion, ventilation, and dilution,if the Standard or Known--Air--Infiltration Method is used.

CARBON MONOXIDE POISONING HAZARDFailure to follow this warning could result in death and/orpersonal injury.

Many homes require air to be supplied from outdoors forfurnace combustion, ventilation, and dilution of flue gases.The furnace combustion air supply must be provided inaccordance with this instruction manual.

! WARNING

Table 1—Minimum Free Area Required for Each Combustion Air Opening of Duct to Outdoors

FURNACEINPUT(BTUH)

TWO HORIZONTAL DUCTS SINGLE DUCT OR OPENING TWO OPENINGS OR VERTICALDUCTS(1 SQ. IN./2,000 BTUH)(1,100 SQ. MM/KW)

(1 SQ. IN./3,000 BTUH)(734 SQ. MM/KW)

(1 SQ. IN./4,000 BTUH)(550 SQ. MM/KW)

Free Area of Open-ing and DuctSq. In. (Sq. mm)

Round DuctDia.In. (mm)





44,000 22 (14194) 6 (152) 14.7 (9484) 5 (127) 11 (7096) 4 (102)66,000 33 (21290) 7 (178) 22.0 (14193) 6 (152) 16.5 (10645) 5 (127)88,000 44 (28387) 8 (203) 29.3 (18903) 7 (178) 22 (14193) 6 (152)110,000 55 (35484) 9 (229) 36.7 (23677) 7 (178) 27.5 (17742) 6 (152)132,000 66 (42580) 10 (254) 44 .0 (28387) 8 (203) 33 (21290) 7 (178)154,000 77 (49677) 10 (254) 51.3 (33096) 9 (229) 38.5 (24839) 8 (203)

EXAMPLES: Determining Free AreaFURNACE WATER HEATER TOTAL INPUT110,000 + 30,000 = (140,000 divided by 4,000) = 35.0 Sq. In. for each two Vertical Ducts or Openings66,000 + 40,000 = (106,000 divided by 3,000) = 35.3 Sq. In. for a Single Duct or Opening88,000 + 30,000 = (118,000 divided by 2,000) = 59.0 Sq. In. for each of two Horizontal Ducts

310AAV

9

Table 2—Minimum Space Volumes for 100% Combustion, Ventilation, and Dilution from Indoors

OTHER THAN FAN-ASSISTED TOTAL(1,000’S BTUH GAS INPUT RATE)

FAN-ASSISTED TOTAL(1,000’S BTUH GAS INPUT RATE)

ACH30 40 50 44 66 88 110 132 154

Space Volume Ft3 (M3)

0.60 1,050(29.7)1,400(39.6)

1,750(49.5)

1,100(31.1)

1,650(46.7)

2,200(62.2)

2,750(77.8)

3,300(93.4)

3,850(109.0)

0.50 1,260(35.6)1,680(47.5)

2,100(59.4)

1,320(37.3)

1,980(56.0)

2,640(74.7)

3,300(93.4)

3,960(112.1)

4,620(130.8)

0.40 1,575(44.5)2,100(59.4)

2,625(74.3)

1,650(46.7)

2,475(70.0)

3,300(93.4)

4,125(116.8)

4,950(140.1)

5,775(163.5)

0.30 2,100(59.4)2,800(79.2)

3,500(99.1)

2,200(62.2)

3,300(93.4)

4,400(124.5)

5,500(155.7)

6,600(186.8)

7,700(218.0)

0.20 3,150(89.1)4,200(118.9)

5,250(148.6)

3,300(93.4)

4,950(140.1)

6,600(186.8)

8,250(233.6)

9,900(280.3)

11,550(327.0)

0.10 6,300(178.3)8,400(237.8)

10,500(297.3)

6,600(186.8)

9,900(280.3)

13,200(373.7)

16,500(467.2)

19,800(560.6)

23,100(654.1)

0.00 NP NP NP NP NP NP NP NP NP

NP = Not Permitted

1 SQ IN . PER 4000

BTUH*

DUCTS TO

O UTDOORS

1 SQ IN. PER 4000 BTUH*

C IR

CU

LA TI

NG

A

IR D

UC

TS VENT

THR OUGH R OOF

D

B

A

C

E


DUCT TO

OUTDOORS

CIRCULA TING AIR DUCT S



DUCT S TO

OUTDOORS

12 ″ MAX

12 ″ MAX

12 ″ MAX

12 ″MAX

12 ″MAX

OU

TDO

OR

S

1 SQ IN . PER 4000

BTUH*

F

G

CLE

AR

AN

CE

IN F

RO

NT

O

F C

OM

B U

ST

ION

AIR

O

PE

NIN

GS

SH

ALL

BE

A

T L

EA

ST

3 IN

.

(305mm) (305mm)

(305mm) (305mm)

(305mm)

(76m

m)

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

A & B C & D D & E F & GA03174

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

CIRCULATING AIR DUCTS

6" MIN (FRONT)Ü

CIRCULATING AIR DUCTS

VENT THROUGH ROOF

1 SQ IN. PER 1000 BTUH* IN DOOR OR WALL

12" MAX

1 SQ IN. PER 1000 BTUH* IN DOOR OR WALL

12" MA X

UNCONFINED SPACE

INTERIOR HEATED SPACE

CLE

AR

AN

CE

IN F

RO

NT

OF

CO

MB

US

TIO

N A

IR

O

PE

NIN

GS

SH

ALL

BE

AT

LEA

ST 3

IN.

(305mm)

(152mm)

(305mm)

* Minimum opening size is 100 sq in. (64516 sq. mm)with minimum dimensionsof 3 in. (76 mm)† Minimum of 3 in. (76 mm) when type-B1 vent is used.

A03175

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

310AAV

10

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

Btuh of the maximum input ratings for all gas appliancesinstalled in the space and

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

The Known Air Infiltration Rate Method shall be used, if theinfiltration 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. Theminimum required volume of the space varies with the number ofACH and shall be determined per Table 2 or Equations 1 and 2.Determine the minimum required volume for each appliance inthe space and add the volumes together to get the total minimumrequired volume for the space.

Table 2 -- Minimum Space Volumes were determined by usingthe following equations from the National Fuel Gas Code ANSIZ223.1--2012/NFPA 54--2012, 9.3.2.2:

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

VolumeOther

= 21ft3

ACHI other

1000 Btu/hr

A04002

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

VolumeFan

= 15ft3

ACHI fan

1000 Btu/hr

A04003

If:Iother = combined input of all other than fan--assistedappliances in Btuh/hrIfan = combined input of all fan--assisted appliances in Btuh/hrACH = air changes per hour (ACH shall not exceed 0.60.) Thefollowing requirements apply to the Standard Method and to theKnown 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 openingshall have free area of at least 1 in.2/1,000 Btuh (2,000mm2/kW) of the total input rating of all gas appliancesin the space, but not less than 100 in.2 (0.06 m2). Oneopening shall commence within 12 in. (300 mm) ofthe ceiling and the second opening shall commencewithin 12 in. (300 mm) of the floor. The minimumdimension of air openings shall be at least 3 in. (80mm). (See Fig. 8.)

c. Combining space on different floor levels. Thevolumes of spaces on different floor levels shall beconsidered as communicating spaces if connected byone or more permanent openings in doors or floorshaving free area of at least 2 in.2/1,000 Btuh (4,400mm2/kW) of total input rating of all gas appliances.

2. An attic or crawlspace may be considered a space thatfreely communicates with the outdoors provided there areadequate permanent ventilation openings directly to out-doors having free area of at least 1--in.2/4,000 Btuh of totalinput rating for all gas appliances in the space.

3. In spaces that use the Indoor Combustion Air Method, in-filtration should be adequate to provide air for combus-tion, permanent ventilation and dilution of flue gases.

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

b. Doors and openable windows are weatherstripped and

c. Other openings are caulked or sealed. These includejoints around window and door frames, between soleplates and floors, between wall--ceiling joints, betweenwall panels, at penetrations for plumbing, electricaland gas lines, etc.

Combination of Indoor and Outdoor Air

1. Indoor openings shall comply with the Indoor Combus-tion Air Method below and,

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

3. Outdoor openings shall be sized as follows:

a. Calculate the Ratio of all Indoor Space volume dividedby required volume for Indoor Combustion AirMethod below.

b. Outdoor opening size reduction Factor is 1 minus theRatio in a. above.

c. Minimum size of Outdoor openings shall be the sizerequired in Outdoor Combustion Air Method abovemultiplied by reduction Factor in b. above. The min-imum dimension of air openings shall be not less than3 in. (80 mm).

INSTALLATIONUPFLOW INSTALLATION

Bottom Return Air Inlet

These furnaces are shipped with bottom closure panel installed inbottom return--air opening. Remove and discard this panel whenbottom return air is used. To remove bottom closure panel,perform the following:

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

BottomClosure Panel

Bottom Filler Panel

A10273

Fig. 9 --- Removing Bottom Closure Panel

2. Rotate bottom filler panel downward to release holdingtabs.

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 inbottom return--air opening. This panel MUST be in place whenonly side return air is used.

310AAV

11

NOTE: Side return--air openings can be used in UPFLOW andmost HORIZONTAL configurations. Do not use side return--airopenings in DOWNFLOW configuration.

In upflow position with side return inlet(s), leveling legs may beused. (See Fig. 10.) Install field--supplied, 5/16 x 1--1/2 in. (8 x38 mm) (max) corrosion--resistant machine bolts, washers andnuts.

NOTE: Bottom closure must be used when leveling legs areused. It may be necessary to remove and reinstall bottom closurepanel to install leveling legs. To remove bottom closure panel, seeItem 1. in Bottom Return Air Inlet section.

1 3 / 4

1 3 / 4

1 3/ 4 1 3/ 4

5/ 16

5 / 16

5/ 16

5/ 16

(44mm)

(8mm)

(44mm)

(8mm)

(8mm)

(8mm)

(44mm) (44mm)

A89014

Fig. 10 --- Leveling Legs

Leveling Legs (If Desired)

To install leveling legs:

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

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

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

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

5. Reinstall bottom closure panel if removed.

DOWNFLOW INSTALLATION

NOTE: For downflow applications, this furnace is approved foruse on combustible flooring when any one of the following 3accessories are used:

S Special Base, KGASB

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

S Coil Box Part No. KCAKC1. Determine application being installed from Table 3.

2. Construct hole in floor per Table 3 and Fig. 11.

3. Construct plenum to dimensions specified in Table 4 andFig. 11.

4. If downflow subbase, KGASB is used, install as shown inFig. 12. If Coil Assembly Part No. CNPV, CNRV, CAR,or CAP or Coil Box Part No. KCAKC is used, install asshown in Fig. 13.

PLENUMOPENING

C

A

B D

FLOOROPENING

A96283

Fig. 11 --- Floor and Plenum Opening Dimensions

NOTE: It is recommended that the perforated supply--air ductflanges be completely folded over or removed from furnace wheninstalling the furnace on a factory--supplied cased coil or coil box.To remove the supply--air duct flange, use wide duct pliers orhand seamers to bend flange back and forth until it breaks off. Becareful of sharp edges. (See Fig. 14.)

DOWNFLOWSUBBASE

SHEET METALPLENUMFLOOR

OPENING

FURNACE(OR COIL CASING

WHEN USED)

COMBUSTIBLEFLOORING

A96285

Fig. 12 --- Furnace, Plenum, and Subbase Installed on aCombustible Floor

310AAV

12

APPROVEDCOIL ASSEMBLY

OR COIL BOX

FURNACE

SHEET METALPLENUM

FLOOROPENING

COMBUSTIBLEFLOORING

A08556

Fig. 13 --- Furnace, Plenum, and Coil Assembly or Coil BoxInstalled on a Combustible Floor







HORIZONTAL INSTALLATION

FIRE, EXPLOSION, AND CARBON MONOXIDEPOISONING HAZARD


Do not install the furnace on its back or hang furnace withcontrol compartment facing downward. Safety controloperation will be adversely affected. Never connectreturn--air ducts to the back of the furnace.

! WARNING

The furnace can be installed horizontally in an attic or crawlspace on either the left--hand (LH) or right--hand (RH) side. Thefurnace can be hung from floor joists, rafters or trusses orinstalled on a non--combustible platform, blocks, bricks or pad.

Suspended Furnace Support

The furnace may be supported under each end with threaded rod,angle iron or metal plumber’s strap as shown. (See Fig. 15 and16.) Secure angle iron to bottom of furnace as shown.Heavy--gauge sheet metal straps (plumber’s straps) may be usedto suspend the furnace from each bottom corner. To preventscrews from pulling out, use 2 #8 x 3/4--in. (19 mm) screws intothe side and 2 #8 x 3/4--in. (19 mm) screws in the bottom of thefurnace casing for each strap. (See Fig. 15 and 16.)

If the screws are attached to ONLY the furnace sides and not thebottom, the straps must be vertical against the furnace sides andnot pull away from the furnace sides, so that the strap attachmentscrews are not in tension (are loaded in shear) for reliable support.

Platform Furnace Support

Construct working platform at location where all required furnaceclearances are met. (See Fig. 2 and 17.) For furnaces with 1--in.(25 mm) clearance requirement on side, set furnace on non--combustible blocks, bricks or angle iron. For crawl spaceinstallations, if the furnace is not suspended from the floor joists,the ground underneath furnace must be level and the furnace seton blocks or bricks.

Roll--Out Protection

Provide a minimum 17--3/4 in. x 22 in. (451 x 559 mm) piece ofsheet metal for flame roll--out protection in front of burner areafor furnaces closer than 12 inches (305 mm) above thecombustible deck or suspended furnaces closer than 12 inches(305 mm) to joists. The sheet metal MUST extend underneath thefurnace casing by 1 in. (25 mm) with the door removed.

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







Side Return Air Inlet

These furnaces are shipped with bottom closure panel installed inbottom return--air opening. This panel MUST be in place whenside return air inlet(s) is used without a bottom return air inlet.

Not all horizontal furnaces are approved for side return airconnections. (See Fig. 20.)

FILTER ARRANGEMENT

CARBON MONOXIDE AND POISONING HAZARD

Failure to follow this warning could result in personalinjury, death and/or property damage.Never operate a furnace without a filter or with filter accessdoor removed.

! WARNING

There are no provisions for an internal filter rack in thesefurnaces.

Refer to the instructions supplied with accessory Media Cabinetfor assembly and installation options.

This furnace requires a field--supplied external filter rack or asuitable field--supplied substitute, such as the media cabinet. Seethe Product Data Sheet for accessory list.

Refer to the instructions supplied with external filter rack forassembly and installation options.

310AAV

13

Table 3—Opening Dimensions -- In. (mm)

FURNACECASINGWIDTH

APPLICATIONPLENUM OPENING FLOOR OPENING

A B C D

14–3/16(360)

Upflow Applications on Combustible or Noncombustible Floor-ing (KGASB subbase not required)

12---11/16(322)

21---5/8(549)

13---5/16(338)

22---1/4(565)

Downflow Applications on Noncombustible Flooring (KGASBsubbase not required)

12---9/16(319)

19(483)

13---3/16(335)

19---5/8(498)

Downflow applications on combustible flooring (KGASB sub-base required)

11---13/16(284)

19(483)

13---7/16(341)

20---5/8(600)

Downflow Applications on Combustible Flooring with CNPV,CNRV, CAR, or CAP Coil Assembly or KCAKC coil box

(KGASB subbase not required)

12---5/16(319)

19(483)

13---5/16(338)

20(508)

17–1/2(445)


16(406)

21---5/8(549)

16---5/8(422)

22---1/4(565)


15---7/8(403)

19(483)

16---1/2(419)

19---5/8(498)


15---1/8(384)

19(483)

16---3/4(425)

20---5/8(600)



15---1/2(394)

19(483)

16---1/2(419)

20(508)

21(533)


19---1/2(495)

21---5/8(549)

20---1/8(511)

22---1/4(565)


19---3/8(492)

19(483)

20(508)

19---5/8(498)


18---5/8(473)

19(483)

20---1/4(514)

20---5/8(600)



19(483)

19(483)

20(508)

20(508)

24---1/2(622)


23(584)

21---1/8(537)

23---5/8(600)

22---1/4(565)


22---7/8(581)

19(483)

23---1/2(597)

19---5/8(498)

Downflow applications on Combustible flooring (KGASB sub-base required)

22---1/8(562)

19(483)

23---3/4(603)

20---5/8(600)



22---1/2(572)

19(483)

23---1/2(597)

20(508)

AIR DUCTS

General Requirements

The duct system should be designed and sized according toaccepted national standards such as those published by: AirConditioning Contractors Association (ACCA), Sheet Metal andAir Conditioning Contractors National Association (SMACNA)or American Society of Heating, Refrigerating and AirConditioning Engineers (ASHRAE) or consult The Air SystemsDesign Guidelines reference tables available from your localdistributor. The duct system should be sized to handle therequired system design CFM at the design external static pressure.The furnace airflow rates are provided in Table 4 -- AIRDELIVERY--CFM (With Filter).

When a furnace is installed so that the supply ducts carry aircirculated by the furnace to areas outside the space containing thefurnace, the return air shall also be handled by duct(s) sealed tothe furnace casing and terminating outside the space containingthe furnace.

Secure ductwork with proper fasteners for type of ductwork used.Seal supply-- and return--duct connections to furnace with codeapproved tape or duct sealer.

NOTE: Flexible connections should be used between ductworkand furnace to prevent transmission of vibration. Ductworkpassing through unconditioned space should be insulated andsealed to enhance system performance. When air conditioning isused, a vapor barrier is recommended.

Maintain a 1--in. (25 mm) clearance from combustible materialsto supply air ductwork for a distance of 36 in. (914 mm)horizontally from the furnace. See NFPA 90B or local code forfurther requirements.

Ductwork Acoustical Treatment

NOTE: Metal duct systems that do not have a 90 degree elbowand 10 ft. (3 M) of main duct to the first branch take--off mayrequire internal acoustical lining. As an alternative, fibrousductwork may be used if constructed and installed in accordancewith the latest edition of SMACNA construction standard onfibrous glass ducts. Both acoustical lining and fibrous ductworkshall comply with NFPA 90B as tested by UL Standard 181 forClass 1 Rigid air ducts.

Supply Air Connections

For a furnace not equipped with a cooling coil, the outlet ductshall be provided with a removable access panel. This openingshall be accessible when the furnace is installed and shall be ofsuch a size that the heat exchanger can be viewed for possibleopenings using light assistance or a probe can be inserted forsampling the air stream. The cover attachment shall prevent leaks.

310AAV

14

Table 4—Air Delivery -- CFM (with Filter)*

FURNACESIZE

RETURN---AIRINLET SPEED

EXTERNAL STATIC PRESSURE (In. W.C.)0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

045---08/024045

Bottom orSide(s)

HighMed---HighMed---Low

1035865760

995830720

945790680

895745635

835690580

770625520

675545445

565440345

390250220

195195195

045---12/036045

Bottom orSide(s)


144013601250

137513001210

130512401160

124011751100

116011151040

10701040965

975950885

870850790

730725670

560575520

070---08/024070

Bottom orSide(s)


1030835725

1005815700

965790675

925755635

870710595

810660545

740590460

645480350

465325250

280205--- ---

070---12/036070

Bottom orSide(s)


142513201200

137512801175

132012401145

126512051105

120011401050

11251075990

1035995920

940905840

830790725

655620555

070---16/048070

Bottom orSide(s)


175515501355

170015201340

163514751310

157014301280

150513751240

143513101190

135012401125

126011551060

11601070975

1055970890

090---14/042090

Bottom orSide(s)


160514701310

157014451295

153514101265

146513801230

138513001195

128512201120

117511151025

1055990915

895830710

645600565

090---16/048090

Bottom orSide(s)


194017401505

188017001505

180516501480

172015901440

163515251375

154014401300

142513351190

129011951045

10901010890

830820740

090---20/060090

Bottom OnlyHigh

Med---HighMed---Low

240521701920

231021101875

222020401835

213019701780

202518951715

192017851630

179016751535

166015651420

153014201275

135012601135

Both Sides or 1Side & Bottom


253022301895

245021701890

236521101845

227020501815

216519851755

206518901685

194017801600

180516601480

167015251350

150513601180

1Side OnlyHigh

Med---HighMed---Low

247521051850

239521451860

230020701810

220020101770

209019401715

198518451650

186517351555

173016201445

158514751310

142513251150

110---12/036110

Bottom orSide(s)


160014751315

155014351295

149013951265

142513351220

135512851155

126011851080

11351070985

990890810

785725675

530450440

110---16/048110

Bottom orSide(s)


198017451530

191517101515

183516501470

175015601400

165514501310

149513401215

136512051095

11851090990

965865830

700605670

110---22/066110

Bottom OnlyHigh

Med---HighMed---Low

248521351855

241521001840

234020601815

225520001775

216019301725

208018601675

195017651600

184016701510

172015551405

156514251290

Bottom Sidesor 1 Side & Bot-

tom


--- ---21401855

--- ---21001840

235520501815

228519901775

219019351725

209018651675

196517601600

185016701510

170515451405

153514101290

1Side OnlyHigh

Med---HighMed---Low

24952030--- ---

244020251735

237020001725

229019501695

220519051650

212018501595

201517501535

191016601455

177515551335

162514251230

* 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.

310AAV

15

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

FURNACESIZE

RETURN---AIRINLET SPEED

EXTERNAL STATIC PRESSURE (In. W.C.)0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

135---16/048135

Bottom orSide(s)


206517901480

200017551480

193017051480

183516401450

171015501380

159014651295

142012951160

123511451005

1025945855

835775670

135---22/066135

Bottom OnlyHigh

Med---HighMed---Low

244521301860

236520801830

228020251800

219019601755

208518801705

198017951630

185016901530

170515501415

152014051280

135512551140

Bottom, Sidesor 1 Side & Bot-

tom


--- ---21201860

--- ---20751830

235519951800

228019701755

216019051725

206518351630

193017351530

180516451415

165515151280

146513251140

1 Side OnlyHigh

Med---HighMed---Low

--- ---20701860

--- ---20151830

221519701800

213019351755

203018551725

192017651630

179516551530

167515501415

154014451280

138512651140

155---20/060155

Bottom OnlyHigh

Med---HighMed---Low

246521151800

243020951790

237520551770

230520051735

221519401695

211018451640

200018201570

186516751465

171515251345

153013901225

Both Sides Or 1Side & Bottom


--- ---21551800

--- ---21251790

237520751770

228520151735

218519351695

210518301640

199517801570

187016351465

172014851345

155513651225

1Side OnlyHigh

Med---HighMed---Low

--- ---21401800

--- ---20851790

226020201770

218019501735

207018501695

197517451640

186516951570

174015451465

159514151345

144012901225

* 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.

UPFLOW DOWNFLOW HORIZONTAL

YES

NO NO

YES

YES

YES

NO

120MIN

YES 120MIN

YES120MIN

90 90

A02020

Fig. 14 --- Duct Flanges

310AAV

16

1 / 4 " (6mm) THREADED ROD4 REQ.

SECURE ANGLEIRON TO BOTTOMOF FURNACE WITH3 #8 x 3/4" (19mm) SCREWSTYPICAL FOR 2 SUPPORTS

1” (25mm) SQUARE, 1-1/4”x1-1/4”x1/8” (32x32x3mm)ANGLE IRON OR UNI-STRUT MAY BE USED

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

8" (203mm) MIN FOR DOOR REMOVAL

OUTER DOOR A S SEMBLY

A10130

Fig. 15 --- Horizontal Unit Suspension

METHOD 2USE (4) #8 x 3/4 (19 mm) SHEETMETAL SCREWS FOR EACHSTRAP. THE STRAPSSHOULD BE VERTICALAGAINST THE FURNACESIDES AND NOT PULL AWAYFROM THE FURNACESIDES.

METHOD 1FOLD ALL STRAPS UNDERFURNACE AND SECURE WTH(4) #8 x 3/4 (19 mm) SHEET METAL SCREWS (2 SCREWS IN SIDE AND 2 SCREWSIN BOTTOM).

A10131

Fig. 16 --- Horizontal Suspension with Straps

310AAV

17

30-IN . (762mm) MIN WORK AREA

6 ″ M IN *

TYPE-B VENT

17 3 / 4 ″

22 ″

SHEET MET AL

SEDIMENT TRAP

EQUIPMENT MANU AL SHUT -OFF GAS VA LV E

LINE CONT A CT ONL Y PERMISSIBLE BETWEEN LINES FORMED BY INTERSECTIONS OF THE T OP AND TW O SIDES OF THE FURNA CE JA CKET AND BUILDING JOISTS , STUDS , OR FRAMING.

GAS ENTR Y

17 3 / 4 ″ (451mm)OVERALL4 3 / 4 ″ (121mm) UNDER DOOR1 ″ (25mm) UNDER FURNACE

EXTEND OUT 12 ″ (305mm)FR OM FA CE OF DOOR

* WHEN USED W ITH SINGLE W ALL VEN T CONNECTIONS

UNION

(152mm)

(451mm)

(559mm)

A10164

Fig. 17 --- Typical Attic Installation

A02075

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

310AAV

18

A02163

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

A02162

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

Upflow and Horizontal Furnaces

Connect supply--air duct to flanges on furnace supply--air outlet.Bend flange upward to 90_ with wide duct pliers. (See Fig. 14.)The supply--air duct must be connected to ONLY the furnacesupply--outlet--air duct flanges or air conditioning coil casing(when used). DO NOT cut main furnace casing side to attachsupply air duct, humidifier, or other accessories. All accessoriesMUST be connected to duct external to furnace main casing.

NOTE: For horizontal applications, the top--most flange may bebent past 90_ to allow the evaporator coil to hang on the flange

temporarily while the remaining attachment and sealing of thecoil are performed.

Downflow Furnaces

Connect supply--air duct to supply--air outlet on furnace. Bendflange inward past 90_ with wide duct pliers. (See Fig. 14.) Thesupply--air duct must be connected to ONLY the furnacesupplyoutlet or air conditioning coil casing (when used). Wheninstalled on combustible material, supply--air duct must beconnected to ONLY the factory--approved accessory subbase or afactory--approved air conditioning coil casing. DO NOT cut mainfurnace casing to attach supply side air duct, humidifier, or other

310AAV

19

accessories. All accessories MUST be connected to duct externalto furnace casing.

FIRE HAZARD

A failure to follow this warning could result in personalinjury, or death and/or property damage.

Never connect return--air ducts to the back of thefurnace. Follow instructions below.

! WARNING

Return Air Connections

Downflow Furnaces

The return--air duct must be connected to return--air opening(bottom inlet) as shown in Fig. 19. DO NOT cut into casing sides(left or right). Side opening is permitted for only upflow and mosthorizontal furnaces. (See Fig. 19.) Bypass humidifier connectionsshould be made at ductwork or coil casing sides exterior tofurnace.

Upflow and Horizontal Furnaces

The return--air duct must be connected to bottom, sides (left orright), or a combination of bottom and side(s) of main furnacecasing as shown in Fig. 18 and 20. Bypass humidifier may beattached into unused return air side of the furnace casing. (SeeFig. 18 and 20.)

Not all horizontal furnaces are approved for side return airconnections. (See Fig. 20.)

GAS PIPING

FIRE OR EXPLOSION HAZARD


Never purge a gas line into a combustion chamber. Nevertest for gas leaks with an open flame. Use a commerciallyavailable soap solution made specifically for the detectionof leaks to check all connections. A fire or explosion mayresult causing property damage, personal injury or loss oflife.

! WARNING



Use proper length of pipe to avoid stress on gas controlmanifold and a gas leak.

! WARNING

Gas piping must be installed in accordance with national andlocal codes. Refer to current edition of NFGC.

Installations must be made in accordance with all authoritieshaving jurisdiction. If possible, the gas supply line should be aseparate line running directly from meter to furnace.

NOTE: In the state of Massachusetts:

1. Gas supply connections MUST be performed by a li-censed plumber or gas fitter.

2. When flexible connectors are used, the maximum lengthshall not exceed 36 inches (915 mm).

3. When lever handle type manual equipment shutoff valvesare used, they shall be T--handle valves.

4. The use of copper tubing for gas piping is NOT approvedby the state of Massachusetts.

Refer to Table 5 for recommended gas pipe sizing. Risers must beused to connect to furnace and to meter. Support all gas pipingwith appropriate straps, hangers, etc. Use a minimum of 1 hangerevery 6 ft. (1.8 M) Joint compound (pipe dope) should be appliedsparingly and only to male threads of joints. Pipe dope must beresistant to the action of propane gas.

Table 5—Maximum Capacity of Pipe

NOMINALIRON PIPESIZEIN. (MM)

INTERNALDIA.

IN. (MM)

LENGTH OF PIPE --- FT (M)

10(3.0)

20(6.0)

30(9.1)

40(12.1)

50(15.2)

1/2 (12.7) 0.622(158) 175 120 97 82 73

3/4 (19.0) 0.824(20.9) 360 250 200 170 151

1( 25.4) 1.049(26.6) 680 465 375 320 285

1-1/4(31.8)

1.380(35.0) 1400 950 770 660 580

1-1/2(38.1)

1.610(40.9) 2100 1460 1180 990 900

* Cubic ft. of natural gas per hr for gas pressures of 0.5 psig (14---In. W.C.)or less and a pressure drop of 0.5---In. W.C. (based on a 0.60 specificgravity gas). Ref: Table 6 and ANSI Z223---2012/NFPA 54---2012.



If local codes allow the use of a flexible gas applianceconnector, always use a new listed connector. Do not use aconnector which has previously served another gasappliance. Black iron pipe shall be installed at the furnacegas control valve and extend a minimum of 2 in. (51 mm)outside the furnace.

! WARNING

FURNACE OVERHEAT HAZARD

Failure to follow this caution may result in unit componentdamage.

Connect gas pipe to gas valve using a backup wrench toavoid damaging gas controls and burner misalignment.

CAUTION!

An accessible manual equipment shutoff valve MUST beinstalled external to furnace casing and within 6 ft. (1.8 M) offurnace. A 1/8--in. (3 mm) NPT plugged tapping, accessible fortest gauge connection, MUST be installed immediately upstreamof gas supply connection to furnace and downstream of manualequipment shutoff valve.

NOTE: The furnace gas valve inlet pressure tap connection issuitable to use as test gauge connection providing test pressureDOES NOT exceed maximum 0.5 psig (14--In. W.C.) stated ongas control valve. (See Fig. 42.)

Some installations require gas entry on right side of furnace (asviewed in upflow.) (See Fig. 21.)

Install a sediment trap in riser leading to furnace as shown in Fig.22. Connect a capped nipple into lower end of tee. Capped nippleshould extend below level of furnace gas controls. Place a groundjoint union between furnace gas control valve and exteriormanual equipment gas shutoff valve. A 1/8--in. (3 mm) NPTplugged tapping, accessible for test gauge connection, MUST beinstalled immediately upstream of gas supply connection tofurnace and downstream of manual equipment shutoff valve.

310AAV

20

2” (51mm)

Street Elbow

A08551

Fig. 21 --- Burner and Manifold

UNION

SEDIMENTTRAP

MANUALSHUTOFFVALVE(REQUIRED)

GASSUPPLY

A02035

Fig. 22 --- Typical Gas Pipe Arrangement

Piping should be pressure and leak tested in accordance withNFGC, local, and national plumbing and gas codes before thefurnace has been connected. After all connections have beenmade, purge lines and check for leakage at furnace prior tooperating furnace.

If pressure exceeds 0.5 psig (14--In. W.C.), gas supply pipe mustbe disconnected from furnace and capped before and duringsupply pipe pressure test. If test pressure is equal to or less than0.5 psig (14--In. W.C.), turn off electric shutoff switch located onfurnace gas control valve and accessible manual equipmentshutoff valve before and during supply pipe pressure test. Afterall connections have been made, purge lines and check forleakage at furnace prior to operating furnace.

The gas supply pressure shall be within the maximum andminimum inlet supply pressures marked on the rating plate withthe furnace burners ON and OFF.

FactoryFactoryInstalledInstalled

AlternateAlternateLocationLocation

A10291

Fig. 23 --- Relocating J--Box

A10141

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

ELECTRICAL CONNECTIONS

ELECTRICAL SHOCK HAZARD


Blower access panel door switch opens 115--v power tocontrol. No component operation can occur. Do not bypassor close switch with panel removed.

! WARNING

See Fig. 26 for field wiring diagram showing typical field 115--vwiring. Check all factory and field electrical connections fortightness.

310AAV

21

ELECTRICAL SHOCK AND FIRE HAZARD


The cabinet MUST have an uninterrupted or unbrokenground according to NEC ANSI/NFPA 70--2011 or localcodes to minimize personal injury if an electrical faultshould occur. This may consist of electrical wire, conduitapproved for electrical ground or a listed, grounded powercord (where permitted by local code) when installed inaccordance with existing electrical codes. Refer to thepower cord manufacturer’s ratings for proper wire gauge.Do not use gas piping as an electrical ground.

! WARNING

FURNACE MAY NOT OPERATE

Failure to follow this caution may result in intermittentfurnace operation.

Furnace control must be grounded for proper operation orelse control will lock out. Control must remain groundedthrough green/yellow wire routed to gas valve and manifoldbracket screw.

CAUTION!

115--V WIRING

Verify that the voltage, frequency, and phase correspond to thatspecified on unit rating plate. Also, check to be sure that serviceprovided by utility is sufficient to handle load imposed by thisequipment. Refer to rating plate or Table 6 for equipmentelectrical specifications.

Make all electrical connections in accordance with NationalElectrical Code (NEC) ANSI/NFPA 70--2011 and any local codesor ordinances that might apply.

FIRE HAZARD


Do not connect aluminum wire between disconnect switchand furnace. Use only copper wire.

! WARNING

Use a separate, fused branch electrical circuit with a properlysized fuse or circuit breaker for this furnace. See Table 6 for wiresize and fuse specifications. A readily accessible means ofelectrical disconnect must be located within sight of the furnace.

NOTE: Proper polarity must be maintained for 115--v wiring. Ifpolarity is incorrect, control LED status indicator light will flashrapidly and furnace will NOT operate.

J--BOX RELOCATION

NOTE: If factory location of J--Box is acceptable, go to nextsection (ELECTRICAL CONNECTION TO J--BOX).

NOTE: On 14--in. (356 mm) wide casing models, the J--Boxshall not be relocated to other side of furnace casing when thevent pipe is routed within the casing.

1. Remove and save two screws holding J--Box. (See Fig.23.)

NOTE: The J--Box cover need not be removed from the J--Boxin order to move the J--Box. Do NOT remove green groundscrew inside J--Box. The ground screw is not threaded into thecasing flange and can be lifted out of the clearance hole in casing

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

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

3. Move J--Box to desired location.

4. Fasten J--Box to casing with two screws removed in Step1.

5. Route J--Box wires within furnace away from sharp edges,rotating parts and hot surfaces.

ELECTRICAL CONNECTION TO J--BOX

Field--Supplied Electrical Box on Furnace J--Box Bracket SeeFig. 24.

1. Remove cover from furnace J--Box.

2. Attach electrical box to furnace J--Box bracket with at leasttwo field--supplied screws through holes in electrical boxinto holes in bracket. Use blunt--nose screws that will notpierce wire insulation.

3. Route furnace power wires through holes in electrical boxand J--Box bracket, and make field--wire connections inelectrical box. Use best practices (NEC in U.S.) for wirebushings, strain relief, etc.

4. Route and secure field ground wire to green ground screwon J--Box bracket.

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

6. Reinstall cover to J--Box. Do not pinch wires betweencover and bracket. Electrical Box on Furnace Casing SideSee Fig. 24.

FIRE OR ELECTRICAL SHOCK HAZARD


If field--supplied manual disconnect switch is to be mountedon furnace casing side, select a location where a drill orfastener cannot damage electrical or gas components.

! WARNING

1. Select and remove a hole knockout in the casing where theelectrical box is to be installed.

NOTE: Check that duct on side of furnace will not interfere withinstalled electrical box.

2. Remove the desired electrical box hole knockout and posi-tion the hole in the electrical box over the hole in the fur-nace casing.

3. Fasten the electrical box to casing by driving two fieldsupplied screws from inside electrical box into casingsteel.

4. Remove and save two screws holding J--Box. (See Fig.23.)

5. Pull furnace power wires out of 1/2--in. (12 mm) diameterhole in J--Box. Do not loosen wires from strain--reliefwire--tie on outside of J--Box.

6. Route furnace power wires through holes in casing andelectrical box and into electrical box.

7. Pull field power wires into electrical box.

8. Remove cover from furnace J--Box.

9. Route field ground wire through holes in electrical boxand casing, and into furnace J--Box.

10. Reattach furnace J--Box to furnace casing with screws re-moved in Step 4.

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

310AAV

22

Table 6—Electrical Data

FURNACE SIZEVOLTS---HERTZ---PHASE

OPERATING VOLTAGERANGE MAXIMUM

UNIT AMPSUNIT

AMPACITY#

MAXIMUMWIRE

LENGTH FT.(M)‡

MAXIMUMFUSE ORCKT BKRAMPS†

MINIMUMWIREGAUGE

Maximum* Minimum*045---08/024045 115---60---1 127 104 5.2 7.26 49 (14.9) 15 14045---12/036045 115---60---1 127 104 7.2 9.79 37 (11.2) 15 14070---08/024070 115---60---1 127 104 5.1 7.14 51 (15.5) 15 14070---12/036070 115---60---1 127 104 7.2 9.72 38 (11.5) 15 14070---16/048070 115---60---1 127 104 9.5 12.60 29 (8.8) 15 14090---14/042090 115---60---1 127 104 8.6 11.39 32 (9.7) 15 14090---16/048090 115---60---1 127 104 10.0 13.09 28 (8.5) 15 14090---20/060090 115---60---1 127 104 14.1 18.2 31 (9.4) 20 12110---12/036110 115---60---1 127 104 8.6 11.27 32 (9.7) 15 14110---16/048110 115---60---1 127 104 10.2 13.34 27 (8.2) 15 14110---22/066110 115---60---1 127 104 15.1 19.42 29 (8.8) 20 12135---16/048135 115---60---1 127 104 10.5 13.63 27 (8.2) 15 14135---22/066135 115---60---1 127 104 14.5 18.72 30 (9.1) 20 12155---20/060155 115---60---1 127 104 15.4 19.83 29 (8.8) 20 12

* Permissible limits of the voltage range at which the unit operates satisfactorily.# Unit ampacity = 125 percent of largest operating component’s full load amps plus 100 percent of all other potential operating components’ (EAC, humidifier,etc.) full load amps.

{ Time---delay type is recommended.} Length shown is as measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop.

12. Complete electrical box wiring and installation. Connectline voltage leads as shown in Fig. 26. Use best practices(NEC) for wire bushings, strain relief, etc.

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

POWER CORD INSTALLATION IN FURNACE J--BOX

NOTE: Power cords must be able to handle the electricalrequirements listed in Table 6. Refer to power cordmanufacturer’s listings.

1. Remove cover from J--Box.

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

3. Secure power cord to J--Box bracket with a strain reliefbushing or a connector approved for the type of cord used.

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



BX CABLE INSTALLATION IN FURNACE J--BOX

1. Remove cover from J--Box.

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

3. Secure BX cable to J--Box bracket with connectors ap-proved for the type of cable used.

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



310AAV

23

BLW

NU

ET

RA

LS

TATU

S C

OD

E LE

D

SEC-2 SEC-1

EAC-2 L2

FUSE 3-AMP

0.5 AMP@24VAC

HUM

TEST/TWIN

G C

om W

Y R

24V

120 180

90 150

BLOWER OFF-DELAY

CO

OL H

EAT

SPARE-1 SPARE-2 PR-1L1

PL2 1

24-V THERMOSTATTERMINALS

3-AMP FUSE

LED OPERATION &DIAGNOSTIC LIGHT

115-VAC(L2)NEUTRALCONNECTIONS

COOLHEAT

SPARE-1

SPARE-2BLOWER SPEED

SELECTION TERMINALS

EAC-1 TERMINAL(115-VAC 1.0 AMP MAX.)

115 VAC (L1) LINEVOLTAGE CONNECTION

PL2-HOT SURFACEIGNITER & INDUCERMOTOR CONNECTOR

PL1-LOW VOLTAGE MAINHARNESS CONNECTOR

TRANSFORMER 24-VACCONNECTIONS

HUMIDIFIER TERMINAL(24-VAC 0.5 AMP MAX.)

TWINNING AND/ORCOMPONENT TEST

TERMINALBLOWER OFF-DELAY

J2

J2 JUMPER

PLT

PL1

SPARE-3

SPARE-31

A11619

Fig. 25 --- Furnace Control

115-V FIELD-SUPPLIED

DISCONNECT

AUXILIARYJ-BOX

24-VTERMINAL

BLOCK

THREE-WIREHEATING-ONLY

FIVE WIRE

NOTE 1

NOTE 2FIELD-SUPPLIEDDISCONNECT

CONDENSINGUNIT

TWOWIRE

FURNACE

CONTROL

R

G

COM

W C R G Y

GND

GND

FIELD 24-V WIRINGFIELD 115-, 208/230-, 460-V WIRINGFACTORY 24-V WIRINGFACTORY 115-V WIRING

208/230- OR460-VTHREEPHASE

208/230-VSINGLEPHASE

BLOWER DOOR SWITCH

WHT

BLK

WHT

BLK

NOTES: Connect Y-terminal in furnace as shown for proper blower operation.Some thermostats require a "C" terminal connection as shown.If any of the original wire, as supplied, must be replaced, usesame type or equivalent wire.

W

Y/Y2

GND

THERMOSTATTERMINALS

1.2.3.

A99440

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

310AAV

24

24--V WIRING

Make field 24--v connections at the 24--v terminal strip. (See Fig.25.) Connect terminal Y as shown in Fig. 26 for proper coolingoperation. Use only AWG No. 18, color--coded, copperthermostat wire.

The 24--v circuit contains an automotive--type, 3--amp. fuselocated on the control. Any direct shorts during installation,service, or maintenance could cause this fuse to blow. If fusereplacement is required, use ONLY a 3--amp. fuse of identicalsize.

ACCESSORIES

1. Electronic Air Cleaner (EAC)Connect an accessory Electronic Air Cleaner (if used) us-ing 1/4--in female quick connect terminals to the two male1/4--in quick--connect terminals on the control boardmarked EAC--1 and EAC--2. The terminals are rated for115 VAC, 1.0 amps maximum and are energized duringblower motor operation. (See Fig. 24.)

2. Humidifier (HUM)Connect an accessory 24 VAC, 0.5 amp. maximum hu-midifier (if used) to the 1/4--in male quick--connect HUMterminal and COM--24V screw terminal on the controlboard thermostat strip. The HUM terminal is energizedwhen gas valve relay (GVR) is energized. (See Fig. 24.)

NOTE: A field--supplied, 115--v controlled relay connected toEAC terminals may be added if humidifier operation is desiredduring blower operation.

NOTE: DO NOT connect furnace control HUM terminal toHUM (humidifier) terminal on Thermidistatt, Zone Controlleror similar device. See Thermidistatt, Zone Controller,thermostat, or controller manufacturer’s instructions for properconnection.

VENTING

The furnace shall be connected to a listed factory built chimneyor vent, or a clay--tile lined masonry or concrete chimney. Ventinginto an unlined masonry chimney or concrete chimney isprohibited.

When an existing Category I furnace is removed or replaced, theoriginal venting system may no longer be sized to properly ventthe attached appliances. An improperly sized Category I ventingsystem could cause the formation of condensate in the furnaceand vent, leakage of condensate and combustion products, andspillage of combustion products into the living space.

Vent system or vent connectors may need to be resized. Ventsystems or vent connectors, must be sized to approach minimumsize as determined using appropriate table found in the NFGC.

GENERAL VENTING REQUIREMENTS

Follow all safety codes for proper vent sizing and installationrequirements, including local building codes, the National FuelGas Code ANSI Z223.1--2012/NFPA 54--2012 (NFGC), Parts 12and 13, local building codes, and furnace and vent manufacturers’instructions.


Failure to follow the steps outlined below for eachappliance connected to the venting system being placed intooperation could result in carbon monoxide poisoning ordeath.

The following steps shall be followed for each applianceconnected to the venting system being placed intooperation, while all other appliances connected to theventing system are not in operation:1. Seal any unused openings in venting system.2. Inspect the venting system for proper size and horizontalpitch, as required in the National Fuel Gas Code, ANSIZ223.1/NFPA 54 and these instructions. Determine thatthere is no blockage or restriction, leakage, corrosion andother deficiencies, which could cause an unsafe condition.3. As far as practical, close all building doors and windowsand all doors between the space in which the appliance(s)connected to the venting system are located and otherspaces of the building.4. Close fireplace dampers.5. Turn on clothes dryers and any appliance not connectedto the venting system. Turn on any exhaust fans, such asrange hoods and bathroom exhausts, so they are operatingat maximum speed. Do not operate a summer exhaust fan.6. Follow the lighting instructions. Place the appliancebeing inspected into operation. Adjust the thermostat soappliance is operating continuously.7. Test for spillage from draft hood equipped appliances atthe draft hood relief opening after 5 minutes of main burneroperation. Use the flame of a match or candle.8. If improper venting is observed during any of the abovetests, the venting system must be corrected in accordancewith the National Fuel Gas Code, ANSI Z223.1/NFPA 54 .9. After it has been determined that each applianceconnected to the venting system properly vents when testedas outlined above, return doors, windows, exhaust fans,fireplace dampers and any other gas--fired burningappliance to their previous conditions of use.

! WARNING

These furnaces are design--certified as Category I furnaces inaccordance with ANSI Z21.47--2012/CSA 2.3--2012 and operatewith a non--positive vent static pressure to minimize the potentialfor vent gas leakage. Category I furnaces operate with a flue lossnot less than 17 percent to minimize the potential forcondensation in the venting system. These furnaces are approvedfor common venting and multistory venting with other fanassisted or draft hood equipped appliances in accordance with theNFGC, the local building codes, and furnace and ventmanufacturers’ instructions.

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



Do not bypass the draft safeguard switch, as an unsafecondition could exist which must be corrected.

! WARNING

310AAV

25

1. If a vent (common or dedicated) becomes blocked, the fur-nace will be shut off by the draft safeguard switch locatedon the vent elbow.

2. Do not connect this Category I furnace into a single--walldedicated or common vent. The dedicated or commonvent is considered to be the vertical portion of the ventsystem that terminates outdoors.

3. Vent connectors serving Category I furnaces shall not beconnected into any portion of a mechanical draft systemoperating under positive pressure.

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

5. Category I furnaces must be vented vertically or nearlyvertically unless equipped with a listed power venter.

6. Do not vent this appliance into an unlined masonry chim-ney. Refer to Chimney Inspection Chart, Fig. 27.

MASONRY CHIMNEY REQUIREMENTS

NOTE: These furnaces are CSA design--certified for use inexterior clay tile--lined masonry chimneys with a factoryaccessory Chimney Adapter Kit. Refer to the furnace rating platefor correct kit usage. The Chimney Adapter Kits are for use withONLY furnaces having a Chimney Adapter Kit numbers markedon the furnace rating plate.

If a clay tile--lined masonry chimney is being used and it isexposed to the outdoors below the roof line, relining might berequired. Chimneys shall conform to the Standard for Chimneys,Fireplaces, Vents, and Solid Fuel Burning Applian

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