Klimaire GM80S User Manual

Gas Furnace

Installation Operation & Service Manual

80 % AFUE

GM80S Series

THIS BOOKLET CONTAINS
IMPORTANT INFORMATION

INSTALLER: USE THE INFORMATION IN THIS BOOKLET

TO INSTALL THE APPLIANCE AND AFFIX THIS
BOOKLET ADJACENT TO THE APPLIANCE
AFTER INSTALLATION.

USER: KEEP THIS BOOKLET OF INFORMATION FOR

FUTURE REFERENCE.

SERVICER: USE THE INFORMATION IN THIS BOOKLET

TO SERVICE THE APPLIANCE AND AFFIX
THE BOOKLET ADJACENT TO THE APPLI ­ANCE AFTER SERVICING.

“NOTE: Please read all instruction in the manual and

retain all manuals for futrue reference. ”

WARNING:

FIRE OR EXPLOSION HAZARD

Failure to follow safety warnings exactly could result in serious injury death
or property damage.

— Do not store or use gasoline or other flammable vapors and liquids in the
vicinity of this or any other appliance.

— WHAT TO DO IF YOU SMELL GAS

— Installation and service must be performed by a qualified installer,
service agency or the gas supplier.

NOTE: Do not use this furnace if any part has been under water. A flood-damaged furnace is extremely dangerous.
Attempts to use the furnace can result in fire or explosion. A qualified service agency should be contacted
to inspect the furnace and to replace all gas controls, control system parts, electrical parts that have been
wet or the furnace if deemed necessary.

GD Midea Heating & Ventilating Equipment Co., Ltd.

Penglai Industry Road, Beijiao, Shunde, Foshan

Guangdong, P.R.China

Installation Start-up Operating and Service and Maintenance Instructions

CONTENTS PAGE

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ISO 9001:2008

NOTE: Read the entire instruction manual before starting the

installation.

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

Z223.1-2006©, with permission of National Fire Protection

Association, Quincy, MA 02269 and American Gas Association,

Washington DC 2000l. 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.

WARNING

FIRE OR EXPLOSION HAZARD

The furnace is designed and approved for use with Natural Gas
and (LP) Propane Gas ONLY. DO NOT BURN ANY LIQUID
FUEL OR SOLID FUEL IN THIS FURNACE.
Burning any unapproved fuel will result in damage to the furnace
heat exchanger, which could result in Fire, Personal Injury, and/or
Property Damage.

I&O manual

I&O manual

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пт НЯЪЫМЗ ЭСТНЧЬЫОЯМЧСТН

WARNING

DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies hazards which
could result in personal injury or death. CAUTION is used to identify
unsafe practices which may result in minor personal injury or product
and property damage. NOTE is used to highlight suggestions which
will result in enhanced Installation, reliability, or operation.

FIRE, EXPLOSION, ELECTRICAL SHOCK,
AND CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in dangerous opera­tion, serious injury, death or property damage. Improper
installation adjustment alteration service maintenance
or use could cause carbon monoxide poisoning explosion
fire electrical shock or other conditions which may cause
personal injury or property damage. Consult a qualified service
agency local gas supplier, or your distributor or branch for
information or assistance. The qualified service agency must
use only factory-authorized and listed kits or accessories when
modifying this product.

CAUTION

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.

CAUTION

CUT HAZARD

Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care
and wear appropriate protective clothing, safety glasses and
gloves when handling parts and servicing furnaces.

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.

In Canada, refer to the current editions of the National Standards of
Canada CAN/CSA-BI49.1 and .2 Natural Gas and Propane Installa­tion Codes, and Canadian Electrical Code CSA C22.1

Recognize safety information. This is the safety-alert symbol . When
you see this symbol on the unit and in instructions or manuals, be alert
to the potential for personal injury. Understand the signal words
DANGER, WARNING, and CAUTION. These words are used with the
safety-alert symbol.

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

Install this furnace only in a location and position as specified in
the "Location" section of these instructions.

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

Combustion products must be discharged outdoors. Connect this
furnace to an approved vent system only, as specified in the
"Venting" section of these instructions.

Never test for gas leaks with an open flame. Use a commercially
available soap solution made specifically for the detection of leaks
to check all connections, as specified in the "Gas Suppy and
Piping" section.

Always install furnace to operate within the furnace's intended
temperature-rise range with a duct system which has an external
static pressure within the allowable range, as specified in the
"Start-Up, Adjustments, and Safety Check" section. See furnace
rating plate.

When a furnace is installed so that supply ducts carry air
circulated by the furnace to areas outside the space containing the
furnace, the return air shall also be handled by duct(s) sealed to
the furnace casing and terminating outside the space containing
the furnace. See "Air Ducts" section.

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

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 instructions.

These multipoise Gas-Fired Furnaces are CSA (formerly A.G.A.
and C.G.A). design-certified for use with natural and propane
gases (see furnace rating plate) and for installation in alcoves
attics, basements, closets, utility rooms, crawlspaces, and
garages. The furnace is factory-shipped for use with natural gas.
A CSA listed accessory gas conversion kit is required to convert
furnace for use with propane gas.

The furnaces must be kept free and clear of insulating materials.
Inspect surrounding area to ensure insulation material is in safe
distance when installing furnaces or adding insulation materials.
Insulation materials may be combustible.

See Fig. 2 for required clearances to combustible construction.

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

These furnaces SHALL NOT be installed directly on carpeting,
tile, or any other combustible material other than wood flooring. In
downflow installations, factory accessory floor base MUST be
used when installed on combustible materials and wood flooring.
Special base is not required when this furnace is installed on
manufacturer's Coil Assembly .

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See Fig Instruction of lighting/ shutdown operation. Should the
gas supply fail to shut off or if overheating occurs, shut off the
gas valve to the furnace before shutting of the electrical supply.

Before heating season begins, exame the furnace to determine
that:
a. All flue gas carrying areas external to the furnace (i.e.
chimney, vent connector) are clear and free of obstructions.
b. The vent connector is in place, slopes upward and is
physically sound without holes or exccessive corrosion.
c. The return-air duct connection(s) is physically cound, is
sealed to the furnace casing, and terminates outside the space
containing the furnace.

Cover old lighting instructions with this label. Note: Rating plate must be left visible for future reference.

d. The physical support of the furnace is sound without sagging,
cracks, gaps, etc around the base so as to provide a seal
between the support and the base.
e. There are no obvious sign of deterioration of the furnace.
f. The burner flames are in good adjustment (by comparison with
pictorial sketches of the main burner flame (see Fig 31).

Furnace operation needs air for combustion and ventilation.
Do not block or obstruct air openings on furnace or spacing
arroud furnace required for supplying sufficient combustion air
and ventilation.

FOR YOUR SAFETY READ BEFORE OPERATING

WARNING

A.

This appliance does not have a pilot. it is equipped with an
ignition device which automatically lights the burner.

Do not try to light the burner by hand.

BEFORE OPERATING smell all around the appliance

B.

area for gas. Be sure to smell next to the floor because
some gas ls heavier than air and will settle on the floor.

If you do not follow these instructions exactly, a fire or explosion may result
causing property damage, personal injury or loss of life.

FOR YOUR SAFETY

“WHAT TO DO IF YOU SMELL GAS”

any phone in your building.

OPERATING INSTRUCTIONS

1. STOP! Read the safety information above on this
label.

2. Set the thermostat to lowest setting.

3. Turn off all electric power to the appliance.

4. This appliance is equipped with an ignition device
which automatically lights the burner. Do not try to
light the burner by hand.

SWITCH SHOWN IN
THE “OFF” POSITION

neighbors phone. Follow the gas suppliers
Instructions.

fire department.
Use only your hand to turn the gas control switch. Never use

C.

call a qualified service technician. Force or attempted repair
may result in a fire or explosion.

Do not use this appliance if any part has been under water.

D.

Immediately call a qualified service technician to inspect the
appliance and to replace any part of the control system and
any gas control which has been under water.

5. Remove control access panel.

6. Wait five (5) minutes to clear out any gas. if you
then smell gas, STOP! Follow “B” in the safety

gas, go to the next step.

7. Push gas control switch to “ON”.
NOTE: Do not force.

8. Replace control access panel.

9.Turn on all electric power to the appliance.

10.Set thermostat to desired setting

11.If the appliance will not operate, follow instructions
“To Turn Off Gas To Appliance” and call your
service technician or gas supplier.

TO TURN OFF GAS TO APPLIANCE

1. Set the thermostat to lowest setting.

2. Turn off all electric power to the appliance if
service is to be performed.

3. Remove control access panel.

4. Push gas control to “OFF”. Do not force.

5. Replace control access panel.

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2-1/8”(54mm)

24-13/16”(630mm)

24-1/2”(622mm)

19-1/2”(495mm)

24-13/16”(630mm)

3-1/8”(79mm)

7-7/16”(189mm)

DIA.THERMOSTAT

WIRE ENTRY

7/8”(22mm)

1-1/2”(38mm)

DIA.JUNCTION BOX LOCATION

7/8”(22mm)

RIGHT SIDE RETURN AIR

28-1/2”(724mm)

Table 1 - Dimensions

33-3/4”(857mm)

14”(355mm)

A

1-1/16”(27mm)

24-13/16”(630mm)

Fig. 1 - Dimensional Drawing

DIA.LEFT VENT OUTLETDIA.RIGHT HAND GAS ENTRY

4-3/4”(120.7mm)

DIA.JUNCTION BOX LOCATION

DIA.LEFT HAND GAS ENTRY

1-3/16”(30mm)

7/8”(22mm)

1-1/2”(38mm)

24-1/2”(622mm)

LEFT SIDE RETURN AIR

22-13/16”(580mm)

E

24”(610mm)

11-3/16”(284mm)

DIA.THERMOSTAT

WIRE ENTRY

7/8”(22mm)

4-1/2”(114mm)

A

FURNACE SIZE

FURNACE SIZE

50A3A

70A3A

80B4A

80C4A

90B4A 145

100C5A

100D5A

110C5A

120D5A

135D5A

CABINET WIDTH

IN. (MM)

14.5
(368)

14.5
(368)

17.5
(445)

21
(533)

17.5
(445)

21
(533)

24.5
(622)

21
(533)

24.5
(622)

24.5
(622)

D

SUPPLY-

AIR WIDTH

IN. (MM)

13
(330)

13
(330)

16
(406)

19.5
(495)

16
(406)

19.5
(495)

23
(584)

19.5
(495)

23
(584)

23
(584)

E

RETURN-

AIR WIDTH

IN. (MM)

12-27/32
(326)

12-27/32
(326)

15-27/32
(402)

19-13/32
(493)

15-27/32
(402)

19-13/32
(493)

22-27/32
(580)

19-13/32
(493)

22-27/32
(580)

22-27/32
(580)

SHIP WT (lbs)

123

128

145

152

161

167

161

172

176

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This series 4-way multipoise Category I fan-assisted furnace is CSA
design-certified. A Category I fan-assisted furnace is an appliance
equipped with an integral mechanical means to either draw or force
products of combustion through the combustion chamber and/or heat
exchanger. The furnace is factory-shipped for use with natural gas.

This furnace is not approved for installation in mobile homes,
recreational vehicles, or outdoors. This furnace is designed for
minimum continuous return-air temperature of 60°F (16°C) db or
intermittent operation down to 55°F (13°C)db such as when used with

WARNING

AVERTISSEMENT

FIRE, EXPLOSION, ASPHYXIATION HAZARD RISQUE
D’INCENDIE, D’EXPLOSION ET ASPHYXIE

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.

Une réglage, une modification, un reparation, un
enretien ou une installation incorrect puet entraîner
des blessures graves ou la mort.
Suivre les instructions et les consignes qui figurent
dans la notice d'utilisation qui accompagne ce
générateur d'air chaud. L'installation et I'entretien
doivent être effecturés par un réparateur qualifié
ou par Ie foumisseur de gaz.

CAUTION

MISE EN GARDE

Check entire gas assembly for leaks after lighting
this appliance.
Vérifier tous les éléments à gaz pour rechercher
les fuites après avoir allumé cet appareil.

INSTALLATION

1.This fumace must be installed in accordance with
the manufacturer's instructions and local codes. In

MINIMUM INCHES CLEARANCE TO COMBUSTIBLE CONSTRUCTION

DISTANCE MINIMALE EN POUCES AUX CONSTRUCTIONS COMBUSTIBLES

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 fumace is for indoor installation in a
building constructed on site.
This fumace 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.

Utiliser une trousse de conversion, foumie
par Ie fabricant, pour passer au gaz propane
ou pour certaines installations au gaz naturel.
Cette foumaise est prévue pour être
installée dans un bâtiment construit sur
place.
Cette foumaise peut être installée sur un
pIanctler combustible dans une aIdôve ou
dans un garde-robe en respedant Ie
minimum d'espace libre des matériaux
combustibles, tel qu'indiqué sur Ie
diagramme.
Cette foumaise peut être utilisée avec un
oondutt d'évacuation de Type B-1 ou

appareils à gaz.

the absence of local codes, follow the National Fuel
Gas Code ANSI Z223.1/ NFPA54 or CSA B-149. 1
Gas Installation Code.
Ce foumaise á air chaud doit être installé
conforrnément aux instructions du fabricant et aux

norme. ANSI Z223.1/NFPA54 intitulée National Fuel

MINIMUM INCHES CLEARANCE TO COMBUSTIBLE CONSTRUCTION

DOWNFLOW POSITIONS:

Installation on non-combustible floors only.

†

For Installation on combustible flooring only when installed on sub-base provided by installer

Gas Code ou Ies code d'installation CSAB149.1.

18 inches front dearanre required for alcove.

2.This fumace must be installed so there are
provisions for combustion and ventilation air. See
manufacturer's installation information provided with
this appliance.
Ce foumaise á air chaud doit être installé de
manière à ce qu'iIyait ait suffisamment d'air de

Ø

HORIZONTAL INSTALLATION IN ATTIC

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.
A special base is required (refer to “Horizontal Installation” section in Manual)

ventilation et combustion. Consulter Ies instructions

OPERATION

This fumace is equipped with manual reset limit
swich(es) in bumer 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.

†

POUR LA POSITION COURANT DESCENDANT:

Pour I'installation sur pIancher non combustible seuIement.

Ø

Pour I'installation sur un pIancher combustible seulement quand on utilise Ia base spéciale
Dans une aloôve, on doit maintenir un dégagement à I'avant de 18 po (450mm).

*

La poistion indiquée conceme Ie côté d' entrée ou de retour quand la foumaise est dans la
position horizontale.
Le contact n'est permis qu'entre Ies lignes formées par les intersections du dessus et des
deux côtés de Ia cherrise de Ia foumaise et Ies soIives, montant sous cadre de charpente.

a night setback thermostat. Return-air temperature must not exceed
85°F (29°C) db. Failure to follow these return-air temperature limits
may affect reliability of heat exchangers, motors, and controls. (See
Fig. 3).

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

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

INSTALLATION

This fumace is approved for UPFLOW,
DOWNFLOW and HORIZONTAL
installations.
Cette foumaise est approuvée pour

d 'air VERS LE HAUT et VERS LE BAS.

Clearance arrows
do not change with
fumace
orientation.

Les fléches de dégag­ement ne change pas

(25.4mm)

avec I 'orientation de
Ia foumaise.

*

Ø

†

Clearance in inches
Dégagement (po).

Vent Clearance to combustibles:
For Single Wall vents 6 inches (6 po),
For Type B-1 vent type 1 inch (1 po).
Dégagement de I'é vent avec combustibles:
Pour oondurt d'évacuation à paroi simple 6 po (6
inches).
Pour oonduit d'évacuation de Type B-1 1 PO (1
inch).

DÉGAGEMENT MINIMUM EN POUCES AVEC ÉLÉMENTS
DE CONSTRUCTION COMBUSTIBLES

*

(609.6mm)

MI

Fig. 2 - Clearances to Combustibles

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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 and Canada, follow all codes and standards for
the following:

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USA: National Fuel Gas Code (NFGC) NFPA 54-2006/ANSI
Z223.1-2006 and the Installation Standards, Warm Air Heating
and Air Conditioning Systems ANSI/NFPA 90B

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US and CANADA: current edition of SMACNA and NFPA 90B as
tested by UL Standard 181 for Class I Rigid Air Ducts

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US: NFPA 54/ANSI Z223.1-2006 Chapters 5,6, 7, and 8 and
National Plumbing Codes.

CANADA: CAN/CSA-B149.1-05 Parts 4, 5, and 6 and
Appendices A, B, E, and H.

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US: National Electrical Code (NEC) ANSI/NFPA 70-2008.

CANADA: CSA B149.1-05 National Standard of Canada Natural
Gas and Propane Installation Codes (CAN/CSA-B149.1-05)

OUTLET
AIR

Max 850F/290C

Min 600F/160C

Fig. 3 - Return Air Temperature

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

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

CANADA: CAN/CSA-B149.1-05. For a copy, contact Standard
Sales, CSA International, 178 Rexdale Boulevard, Etobicoke
(Toronto), Ontario, M9W 1R3 Canada.

CANADA: Canadian Electrical Code CSA C22.I.

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Voltage: ANSI C84.1-2006 (104-127 volt)

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CANADA: CAN/CSA-B149.1-05 Part 8 and Appendix C.

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РОЫЭЯЛМЧСТН РОСЭЫЬЛОЫ

CAUTION

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.

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US: Section 9.3 of the NFGC, NFPA 54/ANSI Z223.1-2006 Air for
Combustion and Ventilation.

CANADA: Part 8 ofCAN/CSA-B149.1-05, Venting Systems and
Air Supply for Appliances.

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US and CANADA: 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.

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Disconnect all power to the furnace. Multiple disconnects maybe
required. DO NOT TOUCH THE CONTROL OR ANY WIRE
CONNECTED TO THE CONTROL PRIOR TO DISCHARGING
YOUR BODY'S ELECTROSTATIC CHARGE TO GROUND.

Firmly touch the clean, unpainted, metal surface of the furnace
chassis which is close to the control.Tools held in a person's hand
during grounding will be satisfactorily discharged.

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

your feet, do not touch ungrounded objects, etc.).

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,

Use this procedure for installed and un installed (ungrounded)
furnaces.

Before removing a new control from its container, discharge your
body's electrostatic charge to ground to protect the control from
damage. If the control is to be installed in a furnace, follow items 1
through 4 before bringing the control or yourself in contact with the
furnace. Put all used and new controls into containers before
touching ungrounded objects.

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

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This multipoise furnace is shipped in packaged configuration. Some
assembly and modifications are required when used in any of the
four applications . 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 (refer to SAFETY CONSIDERATIONS).

Downflow installation and horizontal installation in atttic have
additional requirements. See Section 6 Installation.

Be located as 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 label.

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

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.
Also see Section 6.4.

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

WARNING

CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in personal injury or
death, and unit component damage.
Corrosive or contaminated air may cause failure of parts
containing flue gas, which could leak into the living space. Air
for combustion must not be contaminated by halogen
compounds, which include fluoride, chloride, bromide, and
iodide. These elements can corrode heat exchangers and
shorten furnace life. Air contaminants are found in aerosol
sprays, detergents, bleaches, cleaning solvents, salts, air
fresheners, and other household products. Do not install
furnace in a corrosive or contaminated atmosphere. Make sure
all combustion and circulating air requirements are met, in
addition to all local codes and ordinances.

18-IN. (457.2 mm)
MINIMUM TO BURNERS

Fig. 4 - Installation in a Garage

WARNING

FIRE, INJURY OR DEATH HAZARD

Failure to follow this warning could result in personal injury,
death, and/or property damage.
When the furnace is installed in a residential garage, the
burners and ignition sources must be located at least 18 inches
(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 or CAN/CSA - B149 .1-05. (See
Fig. 4).

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CAUTION

PERSONAL INJURY AND/OR PROPERTY DAMAGE
HAZARD

Improper use or installation of this furnace may cause prema­ture furnace component failure.
This gas furnace may be used for heating buildings under
construction provided that:

- The furnace is permanently installed with all electrical wiring,
piping, venting and ducting installed according to these installa­tion instructions. A return air duct is provided, sealed to the
furnace casing, and terminated outside the space containing
the furnace. This prevents a negative pressure condition as
created by the circulating air blower, causing a flame rollout
and/or drawing combustion products into the structure.

- The furnace is controlled by a thermostat. It may not be "hot
wired" to provide heat continuously to the structure without
thermostatic control.

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

- The temperature of the return air to the furnace is maintained
between 60°F (16°C) and 85°F (29°C), with no evening setback
or shutdown. The use of the furnace while the structure is under
construction is deemed to be intermittent operation per our
installation instructions.

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

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

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

- Verify proper furnace operating conditions including ignition,
gas input rate, air temperature rise, and venting according to
these installation instructions.

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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.

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NOTE: For downflow applications, this furnace is approved for use
on combustible flooring when anyone of the following 3 accessories
are used:

Special Base
Cased Coil Assembly
Coil Box

Determine application being installed from Table 2.

1.
Construct hole in floor per Table 2 and Fig. 6.

2.
Construct plenum to dimensions specified in Table 2 and Fig. 6.

3.
If down flow subbase is used, install as shown in Fig. 7. If Coil

4.
Assembly or Coil Box is used, install as shown in Fig. 8.

NOTE: It is recommended that the 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 Be careful of sharp edges.

Bottom Return Air Inlet

Do not use side return openings in downflow configuration.
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. See 6.1 and Fig. 5 for bottom closure
removal.

A

PLENUM
OPENING

B D

FLOOR
OPENING

C

This furnace can be installed for upflow, downflow and horizonal
positions (see Fig 12-18).

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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:

Tilt or raise furnace and remove the screw holding bottom

1.
filler panel. (See Fig. 5.)
Remove bottom closure panel.

2.

BOTTOM FILLER
PANEL

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Fig. 5 - Removing Bottom Closure Panel

SCREW

BOTTOM CLOSURE PANEL

Fig. 6 - Floor and Plenum Opening Dimensions

TABLE 2 - OPENING DIMENSIONS - IN. (MM)

C

E

G

H

T

FURNA

CASIN

WIDT

14-1/2

(368)

17-1/2

(445)

21

(553)

24-1/2

(622)

APPLICATION

PLENUM OPENING FLOOR OPENING

A B C D

Downflow Applications on Noncombustible Flooring 13-3/16(335) 19-11/16(500)13-13/16(350) 20-5/16(516)

Downflow Applications on Combustible Flooring Using special base 12-3/16(311) 19(483) 13(331)

Downflow Applications on Combustible Flooring with Manufacturer
Supplied Coil Assembly or Coil Box

Downflow Applications on Noncombustible Flooring

Downflow Applications on Combustible Flooring Using special base

Downflow Applications on Combustible Flooring with Manufacturer
Supplied Coil Assembly or Coil Box

Downflow Applications on Noncombustible Flooring

Downflow Applications on Combustible Flooring Using special base

Downflow Applications on Combustible Flooring with Manufacturer
Supplied Coil Assembly or Coil Box

Downflow Applications on Noncombustible Flooring

Downflow Applications on Combustible Flooring Using special base

Downflow Applications on Combustible Flooring with Manufacturer
Supplied Coil Assembly or Coil Box

FURNACE

(OR COIL CASING
WHEN USED)

COMBUSTIBLE
FLOORING

13-3/16(335)

16-3/16(411) 19-11/16(500)16-13/16(427)
15-3/16(385)

16-3/16(411)

19-11/16(500)
18-11/16(474) 19(483) 19-1/2(495)

19-11/16(500)

23-3/16(589)
22-3/16(563)

19-11/16(500)

19-3/16(487)

13-13/16(351) 19-13/16(503)

19(483) 16(406)

19-3/16(487)

16-13/16(427)

19-11/16(500)20-5/16(516) 20-5/16(516)

19-3/16(487)

20-5/16(516)

19-11/16(500)20-5/16(516) 23-13/16(605)

19(483)

19-3/16(487)

FURNACE

APPROVED
COIL ASSEMBLY
OR
COIL BOX

COMBUSTIBLE
FLOORING

23(584)

20-5/16(516)

19-3/4(503)

20-5/16(516)

19-3/4(503)

19-13/16(503)

19-3/4(503)

19-13/16(503)

19-3/4(503)

19-13/16(503)

DOWNFLOW
SUBBASE

SHEET METAL
PLENUM

FLOOR
OPENING

Fig. 7 - Furnace, Plenum, and Subbase Installed on a
Combustible Floor

1/4" (6mm) THREADED
ROD 4 REQ

4

1
4

SECURE ANGLE
IRON TO BOTTOM
OF FURNACE WITH
3 #8 X / " SCREWS

4 1

1
8

TYPICAL FOR 2 SUPPORTS

SHEET METAL
PLENUM
(B, Ref Fig 6)

FLOOR
OPENING
(D, Ref Fig 6)

Fig. 8 - Furnace, Plenum, and Coil Assembly or
Coil Box Installed on a Combustible Floor

22 GAUGE GALVANIZED

STRAPS TYPICAL
FOR 4 STRAPS

OUTER DOOR
ASSEMBLY

METHOD 2
USE (4) #8 X 3/4 (19mm) SHEE
METAL SCREWS FOR EACH
STRAP . THE STRAPS
SHOULD BE VERTICAL
AGAINST THE FURNACE

BACK OF

AIR OPENING

3

FURNACE

METHOD 1
FOLD ALL STRAPS UNDER
FURNACE AND SECURE WITH
(4) #8 X 3/4 (19MM) SHEET METAL SCREWS
(2 SCREWS IN SIDE AND 2 SCREWS
IN BOTTOM) .

SIDES AND NOT PULL AWAY
FROM THE FURNACE
SIDES.

Fig. 9 - Horizontal Unit Suspension Fig. 10 - Horizontal Suspension with Straps

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Supply Air

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.

SEDIMENT

TRAP

Sheet metal in front of furnace
combustion air Openings is

Recommended

Fig. 11 - Typical Attic Installation

VENT(Maintain required clearances to
combustibles)

Return Air

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WARNING

FIRE, EXPLOSION, AND CARBON MONOXIDE
POISONING HAZARD

Failure to follow this warning could result in personal injury,
death, and/or property damage.
Do not install the furnace on its back or hang furnace with
control compartment facing downward. Safety control operation
will be adversely affected. Never connect return-air ducts to the
back of the furnace.

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

Suspended Furnace Support

The furnace may be supported under each end with threaded rod,
angle iron or metal plumber's strap as shown. (See Fig. 9 and 10.)
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. screws into the side and 2 #8 x 3/4-in. screws in
the bottom of the furnace casing for each strap. (See Fig. 9 and 10.)
If the screws are attached to ONLY the furnace sides and not the
bottom, the straps must be vertical against the furnace sides and not
pull away from the furnace sides, so that the strap attachment
screws are not In tension (are loaded in shear) for reliable support.

Platform Furnace Support

Construct working platform at location where all required furnace
clearances are met. (See Fig. 2 and 11.) For furnaces with 1-in.
clearance requirement on side, set furnace on noncombustible
blocks, bricks or angle iron. For crawl space installations, if the
furnace is not suspended from the floor joists, the ground
underneath furnace must be level and the furnace set on blocks or
bricks.

Roll-Out Protection

Provide a piece of sheet metal for flame roll-out protection in front of
burner area for furnaces closer than 12-in. (305 mm) above the
combustible deck or suspended furnaces closer than 12-in. (305
mm) to joists. The sheet metal MUST extend underneath the furnace
casing by 1-in. (25 mm) with the door removed.
The bottom closure panel on furnaces of widths 12in. (305 mm) and
larger may be used for flame roll-out protection when bottom of
furnace is used for return air connection. See Fig. 11 for proper
orientation of roll-out shield.

I&O manual

I&O manual

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