Johnson Controls TG9SMP, GG9SMP User Manual 2

RESIDENTIAL GAS FURNACE

INSTALLATION MANUAL

MODELS: TG9S*MP, GG9S*MP
(95.5% AFUE Single Stage Multi-position)

LIST OF SECTIONS

SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

ELECTRICAL POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

TWINNING AND STAGING . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

CONDENSATE PIPING AND FURNACE

VENTING CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . 16

LIST OF FIGURES

Duct Attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Vertical Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Coil Flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Horizontal Right Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Horizontal Left Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

PC Series Upflow Coil Installation . . . . . . . . . . . . . . . . . . . . . . . . 7

Horizontal Left or Right application (Right Shown) . . . . . . . . . . . 7

Combustible Floor Base Accessory . . . . . . . . . . . . . . . . . . . . . . . 7

Horizontal Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Typical Attic Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Typical Suspended Furnace / Crawl Space Installation . . . . . . . 8

Downflow Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Side Return Cutout Markings . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Thermostat Chart - Single Stage AC

with Single Stage PSC Furnaces . . . . . . . . . . . . . . . . . . . . . . . 13

Thermostat Chart - Single Stage HP

with Single Stage PSC Furnaces . . . . . . . . . . . . . . . . . . . . . . . 14

Typical Twinned Furnace Application . . . . . . . . . . . . . . . . . . . . 15

Twinning Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Staging Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

COMBUSTION AIR and VENT SYSTEM . . . . . . . . . . . . . . . . . 22

START-UP AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . 29

SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

NORMAL OPERATION AND DIAGNOSTICS . . . . . . . . . . . . . 36

REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . 38

REPLACEMENT PART CONTACT INFORMATION . . . . . . . . 38

WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Typical. Condensate drain, vertical in stallation . . . . . . . . . . . . . 17

Typical. Combustion Pipe Drain Tee . . . . . . . . . . . . . . . . . . . . . 17

Upflow Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Downflow Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Horizontal Left Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Horizontal Right Configuration . . . . . . . . . . . . . . . . . . . . . . . . . 21

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Home Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Termination Configuration - 1 Pipe . . . . . . . . . . . . . . . . . . . . . . 25

Termination Configuration - 2 Pipe . . . . . . . . . . . . . . . . . . . . . . 25

Termination Configuration - 2 Pipe Basement . . . . . . . . . . . . . 25

Double Horizontal Combustion

Air Intake and Vent Termination . . . . . . . . . . . . . . . . . . . . . . . . 26

Double Vertical Combustion

Air Intake and Vent Termination . . . . . . . . . . . . . . . . . . . . . . . . 26

Downward Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Direct Vent Air Intake Connection and Vent Connection . . . . . . 26

Combustion Airflow Path Through The Furnace Casing . . . . . . 27

Outside and Ambient Combustion Air . . . . . . . . . . . . . . . . . . . . 28

Attic and Crawl Space Combustion Air Termination . . . . . . . . . 28

Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Reading Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Furnace Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

LIST OF TABLES

Unit Clearances to Combustibles . . . . . . . . . . . . . . . . . . . . . . . . 4

Coil Projection Dimensions - PC Series Coils . . . . . . . . . . . . . . . 7

Cabinet and Duct Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Recommended Filter Sizes (High Velocity 600 FPM) . . . . . . . . . 9

Nominal Manifold Pressure - High Fire . . . . . . . . . . . . . . . . . . . 11

Ratings & Physical / Electrical Data . . . . . . . . . . . . . . . . . . . . . 12

Maximum Equivalent Pipe Length . . . . . . . . . . . . . . . . . . . . . . . 22

Elbow Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Equivalent Length of Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Combustion Air Intake and Vent Connection

Size at Furnace (All Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Estimated Free Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Unconfined Space Minimum Area . . . . . . . . . . . . . . . . . . . . . . . 27

Free Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Gas Rate (CU FT/HR) at Full Input . . . . . . . . . . . . . . . . . . . . . . 31

Inlet Gas Pressure Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Nominal Manifold Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Blower Performance CFM - Any Position

(without filter) - Bottom Return . . . . . . . . . . . . . . . . . . . . . . . . . 34

Blower Performance CFM - Any Position

(without filter) - Left Side Return . . . . . . . . . . . . . . . . . . . . . . . . 35

364861-UIM-H-0712

364861-UIM-H-0712

These high efficiency, compact units employ induced combustion, reli­able hot surface ignition and high heat transfer aluminized tubular heat
exchangers. The units are factory shipped for installation in upflow or
horizontal applications and may be converted for downflow applica­tions.

These furnaces are designed for residential installation in a basement,
closet, alcove, attic, recreation room or garage and are also ideal fo r
commercial applications. All units are factory assembled, wired and
tested to assure safe dependable and economical installation and oper­ation.

These units are Category IV listed and may not be common vented with
another gas appliance as allowed by the National Fuel Gas Code.

SECTION I: SAFETY

This is a safety alert symbol. When you see this symbol on
labels or in manuals, be alert to the potential for personal
injury.

Understand and pay particular attention to the signal words DANGER,

WARNING, or CAUTION.
DANGER indicates an imminently hazardous situation, which, if not

avoided, will result in death or serious injury
WARNING indicates a potentially hazardous situation, which, if not

avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation, which, if not

avoided may result in m inor or moderate injury. It is also used to
alert against unsafe practices and hazards involving only property dam­age.

Improper installation may create a condition where the operation of
the product could cause personal injury or property damage.
Improper installation, adjustment, alteration, service or maintenance
can cause injury or property damage. Failure to carefully read and

follow all instructions in this manual can result in furnace mal­function, death, personal injury and/or property damage. Only a

qualified contractor, installer or service agency should install this
product.

.

8. 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.

9. It is permitted to use the furnace for heating of buildings or struc­tures under construction where the application and use must com­ply with all manufacturer’s installation instructions including:

• Proper vent installation;

• Furnace operating under thermostatic control;

• Return air duct sealed to the furnace;

• Air filters in place;

• Set furnace input rate and temperature rise per rating plate mark-

ing;

• Means for providing outdoor air required for combustion;

• Return air temperature maintained between 55ºF (13ºC) and

80ºF (27ºC);

•The air filter must be replaced upon substantial completion of

the construction process;

• Clean furnace, duct work and components upon substantial com-

pletion of the construction process, and verify furnace-operating
conditions including ignition, input rate, temperature rise and
venting, according to the manufacturer’s instructions.

10. When installed in a non-HUD-Approved Modular Home or building
constructed on-site, combustion air shall not be supplied from occu­pied spaces.

11. The size of the unit should be based on an acceptable heat loss
calculation for the structure. ACCA, Manual J or other approved
methods may be used.

12. When moving or handling this furnace prior to installation, always
leave the doors on the furnace to provide support and to prevent
damage or warping of the cabinet. When lifting the furnace by the
cabinet, support the ends of the furnace rather than lifting by the
cabinet flanges at the return air openings (bottom or sides) or sup­ply air opening.

13. When lifting the furnace, it is acceptable to use the primary heat
exchanger tubes as a lifting point provided that the tubes are lifted
at the front of the heat exchangers where attached to the vestibule
panel. Do not use the top return bend of the heat exchangers as lift­ing points as the tubes may shift out of position or their location
brackets/baffles.

SPECIFIC SAFETY RULES AND PRECAUTIONS

1. Only Natural gas or Propane (LP) gas are approved for use with
this furnace.

2. Install this furnace only in a location and position as specified in
these instructions.

3. A gas-fired furnace for installation in a residential garage must be
installed as specified in these instructions.

4. Provide adequate combustion and ventilation air to the furnace
space as specified in these instructions.

5. Combustion products must be discharged outdoors. Connect this
furnace to an approved vent system only, as specified in "COM­BUSTION AIR and VENT SYSTEM" of these instructions.

6. Test for gas leaks as specified in these instructions.

FIRE OR EXPLOSION HAZARD

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

Never test for gas leaks with an open flame. Use a commercially
available soap solution made specifically for detection of leaks to
check all connections. A fire or explosion may result causing property
damage, personal injury or loss of life.

7. Always install the furnace to operate within the furnace’s intended
temperature rise range. Only connect the furnace to a duct system
which has an external static pressure within the allowable range, as
specified on the furnace rating plate.

During installation, doors should remain on the furnace when
moving or lifting.

SAFETY REQUIREMENTS

This product must be installed in strict compliance with the installation
instructions and any applicable local, state, and national codes
including, but not limited to building, electrical, and mechanical codes.

• Refer to the unit rating plate for the furnace mode l number, and
then see the dimensions page of this instruction for return air ple­num dimensions in Figure 13. The plenum must be installed
according to the instructions.

• Provide clearances from combustible materials as listed under
Clearances to Combustibles.

• Provide clearances for servicing ensuring that service access is
allowed for both the burners and blower.

• These models ARE NOT
into a HUD Approved Modular Home
(Mobile) Home.

• This furnace is not approved for installation in trailers or recr e­ational vehicles.

• Furnaces for installation on combustible flooring shall not be
installed directly on carpeting, tile or other combustible material
other than wood flooring.

CSA listed or approved for installation

or a Manufactured

2 Johnson Controls Unitary Products

364861-UIM-H-0712

• Check the rating plate and power supply to be sure that the elec­trical characteristics match. All models use nominal 115 VAC, 1
Phase, 60-Hz power supply. DO NOT CONNECT THIS APPLI­ANCE TO A 50-Hz POWER SUPPLY OR A VOLTAGE ABOVE
130 VOLTS.

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

• Installing and servicing heating equipment can be hazardous due
to the electrical components and the gas fired components. Only
trained and qualified personnel should install, repair, or service
gas heating equipment. Untrained service personnel can perform
basic maintenance functions such as cleaning and replacing the
air filters. When working on heating equipment, observe precau­tions in the manuals and on the labels attached to the unit and
other safety precautions that may apply.

COMBUSTION AIR QUALITY
(LIST OF CONTAMINANTS)

The furnace area must not be used as a broom closet or for any other
storage purposes, as a fire hazard may be created. Never store items
such as the following on, near or in contact with the furnace.

1. Spray or aerosol cans, rags, brooms, dust mops, vacuum
cleaners or other cleaning tools.

2. Soap powders, bleaches, waxes or other cleaning com­pounds; plastic items or containers; gasoline, kerosene, ciga­rette lighter fluid, dry cleaning fluids or other volatile fluid.

3. Paint thinners and other painting compounds.

4. Paper bags, boxes or other paper products

Never operate the furnace with the blower door removed. To do
so could result in serious personal injury and/or equipment
damage.

The furnace requires OUTDOOR AIR for combustion when the furnace
is located in any of the following environments.

• Buildings with indoor pools

• Chemical exposure

• Commercial buildings

• Furnaces installed in hobby or craft rooms

• Furnaces installed in laundry rooms

• Furnaces installed near chemical storage areas

• Restricted Environments

The furnace requires OUTDOOR AIR for combustion when the furnace
is located in an area where the furnace is being exposed to the follow­ing substances and / or chemicals.

• Antistatic fabric softeners for clothes dryers

• Carbon tetrachloride

• Cements and glues

• Chlorine based swimming pool chemicals

• Chlorinated waxes and cleaners

• Cleaning solvents (such as perchloroethylene)

• De-icing salts or chemicals

• Halogen type refrigerants

• Hydrochloric acid

• Masonry acid washing materials

• Permanent wave solutions

• Printing inks, paint removers, varnishes, etc.

• Water softening chemicals

When outdoor air is used for combustion, the combustion air intake duct
system termination must be located external to the building and in an
area where there will be no exposure to the substances listed above.

CODES AND STANDARDS

Follow all national, local codes and standards in addition to this installa­tion manual. 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, using the latest edition available:

STEP 1 - Safety

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

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

STEP 2 - General Installation

• US: Current edition of the NFGC and NFPA 90B. For copies, con­tact the

National Fire Protection Association Inc.
Batterymarch Park
Quincy, MA 02269

or for only the NFGC, contact the

American Gas Association,
400 N. Capital, N.W.
Washington DC 20001

or www.NFPA.org

• CANADA: NSCNGPIC. For a copy contact:

Standard Sales, CSA International
178 Rexdale Boulevard
Etobicoke, (Toronto) Ontario Canada M9W 1RS

STEP 3 - Combustion and Ventilation Air

• US: Section 5.3 of the NFGC, air for Combustion and Ventilation

• CANADA: Part 7 of NSCNGPIC, Venting Systems and Air Supply
for Appliances

STEP 4 - Duct Systems

• US and CANADA: Air Conditioning Contractors Association
(ACCA) Manual D, Sheet Metal and Air Conditioning Contractors
Association National Association (SMACNA), or American Soci­ety of Heating, Refrigeration, and Air Conditioning Engineers
(ASHRAE) 1997 Fundamentals Handbook Chapter 32.

STEP 5 - Acoustical Lining and Fibrous Glass Duct

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

STEP 6 - Gas Piping and Gas Pipe Pressure Testing

• US: NFGC; chapters 2, 3, 4, & 9 and National Plumbing Codes

• CANADA: NSCNGPIC Part 5

STEP 7 - Electrical Connections

• US: National Electrical Code (NEC) ANSI/NFPA 70

• CANADA: Canadian Electrical Code CSA C22.1

These instructions cover minimum requirements and conform to exist­ing national standards and safety codes. In some instances these
instructions exceed certain local codes and ordinances, especially
those who have not kept up with changing residential and non-HUD
modular home construction practices. These instructions are required
as a minimum for a safe installation.

Johnson Controls Unitary Products 3

364861-UIM-H-0712

FOR FURNACES INSTALLED IN THE COMMON­WEALTH OF MASSACHUSETTS ONLY

For all side wall horizontally vented gas fueled equipment installed in
every dwelling, building or structure used in whole or in part for resi­dential purposes, including those owned or operated by the Com­monwealth and where the side wall exhaust vent termination is less
than seven (7) feet above finished grade in the area of the venting,
including but not limited to decks and porches, the following require­ments shall be satisfied:

1. INSTALLATION OF CARBON MONOXIDE DETECTORS. At
the time of installation of the side wall horizontal vented gas
fueled equipment, the installing plumber or gasfitter shall
observe that a hard wired carbon monoxide detector with an
alarm and battery back-up is installed on the floor level where the
gas equipment is to be installed. In addition, the installing
plumber or gasfitter shall observe that a battery operated or hard
wired carbon monoxide detector with an alarm is installed on
each additional level of the dwelling, building or structure served
by the side wall horizontal vented gas fueled equipment. It shall
be the responsibility of the property owner to secure the services
of qualified licensed professionals for the installation of hard
wired carbon monoxide detectors

a. In the event that the side wall horizontally vented gas

fueled equipment is installed in a crawl space or an attic,
the hard wired carbon monoxide detector with alarm and
battery back-up may be installed on the next adjacent floor
level.

b. In the event that the requirements of this subdivision can

not be met at the time of completion of installation, the
owner shall have a period of thirty (30) days to comply with
the above requirements; provided, however, that during
said thirty (30) day period, a battery operated carbon mon­oxide detector with an alarm shall be installed.

2. APPROVED CARBON MONOXIDE DETECTORS. Each carbon
monoxide detector as required in accordance with the above pro­visions shall comply with NFPA 720 and be ANSI/UL 2034 listed
and IAS certified.

3. SIGNAGE. A metal or plastic identification plate shall be perma­nently mounted to the exterior of the building at a minimum
height of eight (8) feet above grade directly in line with the
exhaust vent terminal for the horizontally vented gas fueled heat­ing appliance or equipment. The sign shall read, in print size no
less than one-half (1/2) inch in size, "GAS VENT DIRECTLY
BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS".

4. INSPECTION. The state or local gas inspector of the side wall
horizontally vented gas fueled equipment shall not approve the
installation unless, upon inspection, the inspector observes car­bon monoxide detectors and signage installed in accordance
with the provisions of 248 CMR 5.08(2)(a)1 through 4.

INSPECTION

As soon as a unit is received, it should be inspected for possible dam­age during transit. If damage is evident, the extent of the damage
should be noted on the carrier’s freight bill. A separate request for
inspection by the carrier’s agent should be made in writing. Also, before
installation, the unit should be checked for screws or bolts which may
have loosened in transit. There are no shipping or spacer brackets
which need to be removed from the interior of this unit.

FURNACE LOCATION AND CLEARANCES

The furnace shall be located using the following guidelines:

1. Where a minimum amount of air intake/vent piping and elbows will
be required.

2. As centralized with the air distribution as possible.

3. Where adequate combustion air will be available (particularly when
the appliance is not using outdoor combustion air).

4. Where it will not interfere with proper air circulation in the confined
space.

5. Where the outdoor vent terminal will not be blocked or restricted.
Refer to “VENT CLEARANCES” located in SECTION VII of these
instructions. These minimum clearances must be maintained in the
installation.

6. Where the unit will be installed in a level position with no more than
1/4” (6.4 mm) slope side-to-side and front-to-back to provide proper
condensate drainage.

Installation in freezing temperatures:

1. Furnace shall be installed in an area where ventilation facilities pro­vide for safe limits of ambient temperature under normal operating
conditions. Ambient temperatures must not fall below 32°F (0°C)
unless the condensate system is protected from freezing.

Improper installation in an ambient below 32ºF (0° C) could create a
hazard, resulting in damage, injury or death.

2. Do not allow return air temperature to be below 55ºF (13°C) for
extended periods. To do so may cause condensation to occur in the
main heat exchanger, leading to premature heat exchanger failure.

3. If this furnace is installed in an unconditioned space and an
extended power failure occurs, there will be potential damage to the
internal components. Following a power failure situation, do not
operate the unit until inspection and repairs are performed.

Liquid anti-freeze will cause damage to internal plastic parts of this
furnace. DO NOT attempt to winterize the furnace using liquid

anti-freeze.

Clearances for access/service:

Ample clearances should be provided to permit easy access to the unit.
The following minimum clearances are recommended:

1. Twenty-four (24) inches (61 cm) between the front of the furnace
and an adjacent wall or another appliance, when access is required
for servicing and cleaning.

2. Eighteen (18) inches (46 cm) at the side where access is required
for passage to the front when servicing or for inspection or replace­ment of flue/vent connections.

In all cases, accessibility clearances shall take precedence over clear­ances for combustible materials where accessibility clearances are
greater.

Installation in a residential garage:

A gas-fired furnace for installation in a residential garage must be
installed so the burner(s) and the ignition source are located not less
than 18” (46 cm) above the floor, and the furnace must be located or
protected to avoid physical damage by vehicles.

Table 1: Unit Clearances to Combustibles

Application

Top 1" 0" 0"
Vent 0" 0" 0"
Rear 0" 0" 0"
Side 0" 0" 1"

Front* 0" 0" 0"

Floor Combustible

Closet Yes Yes Yes

Line Contact No No Yes

1. For combustible floors only when used with special sub-base.
* 24" clearance in front and 18" on side recommended for service access.
All furnaces approved for alcove and attic installation.

Upflow Downflow Horizontal

1

Combustible

Combustible

4 Johnson Controls Unitary Products

SECTION II: DUCTWORK

Factory
installed

For duct attachment,
if needed.

DUCTWORK GENERAL INFORMATION

The duct system’s design and installation must:

1. Handle an air volume appropriate for the served space and within
the operating parameters of the furnace specifications.

2. Be installed in accordance of National Fire Protection Association
as outlined in NFPA standard 90B (latest editions) or applicable
national, provincial, state, and local fire and safety codes.

3. Create a closed duct system. For residential and non-HUD Modular
Home installations, when a furnace is installed so that the supply
ducts carry air circulated by the furnace to areas outside the space
containing the furnace, the return air shall also be handled by a
duct(s) sealed to the furnace casing and terminating outside the
space containing the furnace.

4. Complete a path for heated or cooled air to circulate through the air
conditioning and heating equipment and to and from the condi­tioned space.

The cooling coil must be installed in the supply air duct, downstream
of the furnace. Cooled air may not be passed over the heat
exchanger.

When the furnace is used with a cooling coil, the coil must be installed
parallel with, or in the supply air side of the furnace to avoid condensa­tion in the primary heat exchanger. When a parallel flow arrangement is
used, dampers or other means used to control airflow must be ade­quate to prevent chilled air from entering the furnace. If manually oper­ated, the damper must be equipped with means to prevent the furnace
or the air conditioner from operating unless the damper is in full heat or
cool position.
When replacing an existing furnace, if the existing plenum is not the
same size as the new furnace then the existing plenum must be
removed and a new plenum installed that is the proper size for the new
furnace. If the plenum is shorter than 12” (30.5 cm) the turbulent air flow
may cause the limit controls not to operate as designed, or the limit con­trols may not operate at all.

The duct system is a very important part of the installation. If the duct

system is improperly sized the furnace will not operate properly.

The ducts attached to the furnace plenum, should be of sufficient size
so that the furnace operates at the specified external static pressure
and within the air temperature rise specified on the nameplate.

364861-UIM-H-0712

The duct system must be properly sized to obtain the correct airflow
for the furnace size that is being installed.

Refer to Table 6 or the furnace rating plate for the correct rise range
and static pressures.
If the ducts are undersized, the result will be high duct static pres­sures and/or high temperature rises which can result in a heat
exchanger OVERHEATING CONDITION. This condition can result in
premature heat exchanger failure, which can result in personal injury,
property damage, or death.

DUCT FLANGES

Four flanges are provided to attach ductwork to the furnace. These
flanges are rotated down for shipment. In order to use the flanges,
remove the screw holding an individual flange, rotate the flange so it is
in the upward position and reinstall the screw then repeat this for all 4
flanges.

If the flanges are not used, they must remain in the rotated down posi­tion as shipped.

FIGURE 1: Duct Attachment

DUCTWORK INSTALLATION AND SUPPLY PLENUM
CONNECTION - UPFLOW/HORIZONTAL

Attach the supply plenum to the furnace outlet. The use of
an approved flexible duct connector is recommended on all
installations. This connection should be sealed to prevent
air leakage. The sheet metal should be crosshatched to
eliminate any popping of the sheet metal when the indoor
fan is energized.

The minimum plenum height is 12” (30.5 cm). The furnace will not
operate properly on a shorter plenum height. The minimum recom­mended rectangular duct height is 4” (10.1 cm) attached to the ple­num.

If a matching cooling coil is used, it may be placed directly on the fur­nace outlet and sealed to prevent leakage. If thermoplastic evaporator
‘A’ coil drain pans are to be installed in the upflow/horizontal configura­tion, then extra 2” minimum spacing may be needed to ensure against
drain pan distortion.
On all installations without a coil, a removable access panel is recom­mended in the outlet duct such that smoke or reflected light would be
observable inside the casing to indicate the presence of leaks in the
heat exchanger. This access cover shall be attached in such a manner
as to prevent leaks.

FLOOR BASE AND DUCTWORK INSTALLATION ­DOWNFLOW

Installations on combustible material or directly on any
floors must use a combustible floor base shown in Figure 8.
Follow the instructions supplied with the combustible floor
base accessory. This combustible floor base can be
replaced with a matching cooling coil, properly sealed to
prevent leaks. Follow the instructions supplied with the

cooling coil cabinet for installing the cabinet to the duct con­nector. Plug intake and vent pipe holes in bottom panel and move grom­met to desired vent side exit.

Downflow Air Conditioning Coil Cabinet

The furnace should be installed with coil cabinet part number specifi­cally intended for downflow application. If a matching cooling coil is
used, it may be placed directly on the furnace outlet and sealed to pre­vent leakage. For details of the coil cabinet dimensions and installation
requirements, refer to the installation instructions supplied with the coil
cabinet.

Attach the air conditioning coil cabinet to the duct connector, and then
position the furnace on top of the coil cabinet. The connection to the fur­nace, air conditioning coil cabinet, duct connector, and supply air duct
must be sealed to prevent air leakage.

Johnson Controls Unitary Products 5

364861-UIM-H-0712

UPFLOW

DOWNFLOW

Furnace

Furnace

ALTERNATE
FLANGE LOCATION
(Used for downflow or
horizontal left installations)

FACTORY

FLANGE

LOCATION

(Used for upflow

or horizontal

right installations)

Furnace

Mounting Plate

Furnace

Mounting Plate

COIL INSTALLATION

On all installations without a coil, a removable access panel is recom­mended in the outlet duct such that smoke or reflected light would be
observable inside the casing to indicate the presence of leaks in the
heat exchanger. This access cover shall be attached in such a man­ner as to prevent leaks.

COIL/FURNACE ASSEMBLY - MC/FC/PC SERIES
COILS

FURNACE ASSEMBLY - MC SERIES COILS ONLY

MC coils are supplied ready to be installed in a horizontal position. A
horizontal pan is factory installed. MC coils should be installed in all hor­izontal applications with the horizontal drain pan side down.

FIGURE 4: Horizontal Right Application
For horizontal left hand applications no conversion is required to an MC

coil when used with a downflow/horizontal furnace. A mounting plate,
supplied with every coil should always be installed on the side desig­nated as top side. See Figures 4 & 5.

FIGURE 2: Vertical Applications

FURNACE ASSEMBLY - MC & FC SERIES COILS

These coils are factory shipped for installation in either upflow or down­flow applications with no conversion.

Position the coil casing over or under the furnace opening as shown in
Figure 2 after configuring coil flanges as required see “Coil Flange” sec­tion below.

COIL FLANGE INSTALLATION

The coils include removable flanges to allow proper fit up with furnaces
having various inlet and outlet flange configurations. The two flanges
are attached to the top of the coil in the factory during production. For
proper configuration of flanges refer to Figure 3.

FIGURE 5: Horizontal Left Application

FURNACE ASSEMBLY - PC SERIES COILS

These upflow coils are designed for installation on top of upflow fur­naces only.

If the coil is used with a furnace of a different size, use a 45° transition
to allow proper air distribution through the coil.

1. Position the coil casing over the furnace opening as shown in Fig­ure 6.

2. Place the ductwork over the coil casing flange and secure.

3. Check for air leakage between the furnace and coil casing and seal
appropriately.

Do not drill any holes or drive any screws into the front duct flange on
the coil in order to prevent damaging coil tubing. See Figure 6.

FIGURE 3: Coil Flange

6 Johnson Controls Unitary Products

FIGURE 6: PC Series Upflow Coil Installation

Flexible
Duct Collar

Do not drill
or Screw
this flange

Field
Fabricated
Ductwork

Upflow
Coil

Upflow
Furnace

Secondary

Drain

Primary

Drain

D

C

(Min)

Alternate

Drain Location

NOTICE

Use tie plate
supplied with coil

Air flow

Gas Furnace

FURNACE

WARM AIR PLENUM
WITH 1” FLANGES

FIBERGLASS
INSULATION

FIBERGLASS TAPE
UNDER FLANGE

COMBUSTIBLE FLOOR
BASE ACCESSORY

Table 2: Coil Projection Dimensions - PC Series Coils

COIL SIZE DIMENSION “C” INCH

PC18 3-1/2
PC24 4-1/2

PC30, PC32, PC35 4-1/2

PC42, PC43, PC36, PC37 5-1/2

PC48 6-1/2
PC60 9

Dimension “C” should be at least 2/3 of dimension “D”. See Figure 6.

CRITICAL COIL PROJECTION

The coil assembly must be located in the duct such that a minimum dis­tance is maintained between the top of the coil and the top of the duct.
Refer to Table 2.

COIL / FURNACE ASSEMBLY - HC SERIES COILS

These coils are supplied ready to be installed in a right hand position or
a left hand position. When used in conjunction with a horizontal furnace
(blow through) application, the coil should be oriented with the opening
of the “A” coil closest to the furnace. See Figure 7.

Each coil is shipped with an external tie plate that should be used to
secure the coil to the furnace. It should be installed on the back side
of the coil using the dimpled pilot holes. See Figure 7.

364861-UIM-H-0712

DOWNFLOW DUCT CONNECTORS

All downflow installations must use a suitable duct connector approved
by the furnace manufacturer for use with this furnace. The duct connec­tors are designed to be connected to the rectangular duct under the
floor and sealed. Refer to the instructions supplied with the duct con­nector for proper installation. Refer to the separate accessory parts list
at the end of these instructions for the approved accessory duct con­nectors.

FIGURE 8: Combustible Floor Base Accessory

RESIDENTIAL AND MODULAR HOME UPFLOW
RETURN PLENUM CONNECTION

Return air may enter the furnace through the side(s) or bottom depend­ing on the type of application. Return air may not be connected into the
rear panel of the unit.

SIDE RETURN APPLICATION

Side return applications pull return air through an opening cut in the
side of the furnace casing. This furnace is supplied with a bottom block­off panel that should be left in place if a side return is to be used. If the
furnace is to be installed on a flat, solid surface, this bottom panel will
provide an adequate seal to prevent air leakage through the unused
bottom opening. However, if the furnace is to be installed on a surface
that is uneven, or if it is to be installed on blocks or otherwise raised off
the floor, it will be necessary to seal the edges of the bottom panel

to the casing using tape or other appropriate gasket material to
prevent air leakage.

BOTTOM RETURN AND ATTIC INSTALLATIONS

Bottom return applications normally pull return air through a base plat­form or return air plenum. Be sure the return platform structure or return
air plenum is suitable to support the weight of the furnace.

The internal bottom panel must be removed for this application.
Attic installations must meet all minimum clearances to combustibles

and have floor support with required service accessibility.

HORIZONTAL APPLICATION

FIGURE 7: Horizontal Left or Right application (Right Shown)

Johnson Controls Unitary Products 7

FIGURE 9: Horizontal Application

This furnace may be installed in a horizontal position on either side as
shown above. It must not be installed on its back.

364861-UIM-H-0712

Return
Air

Sediment

Trap

Gas Piping

Supply
Air

Vent (Maintain
required
clearances to
combustibles)

Line contact only permissible
between lines formed by the
intersection of furnace top
and two sides and building
joists, studs or framing

30” MIN.
Work Area

Filter rack
must be a minimum
distance
of 18” (45.7 cm)
from the
furnace

Support
Rod

Support
Angle (x3)

Maintain 6” minimum
clearance between support
rods and front of furnace

LEFT SIDE VENT

RIGHT SIDE VENT

Rotate vent
blower 90°
either way

ATTIC INSTALLATION

FIGURE 10: Typical Attic Installation

This appliance is certified for line contact when the furnace is installed
in the horizontal left or right position. The line contact is only permissible
between lines that are formed by the intersection of the top and two
sides of the furnace and the building joists, studs or framing. This line
may be in contact with combustible material. Refer to Figure 10.

When a furnace is installed in an attic or other insulated space, keep
all insulating materials at least 12” (30.5 cm) away from furnace and
burner combustion air openings.

Units may also be suspended from rafters or floor joists using rods, pipe
angle supports or straps. In all cases, the furnace should be supported
with rods, straps, or angle supports at three locations to properly sup­port the furnace. Place one support at the supply end of the furnace,
one support located approximately in the center of the furnace near the
blower shelf, and the third support should be at the return end of the fur­nace. Maintain a 6” (15.2 cm) minimum clearance between the front of
the furnace and the support rods or straps.

All six suspension points must be level to ensure proper and quiet fur­nace operation. When suspending the furnace, use a secure platform
constructed of plywood or other building materials secured to the floor
or ceiling joists. Refer to Figure 11 for det ails and additional information.

FIGURE 11: Typical Suspended Furnace / Crawl Space Installation

DOWNFLOW APPLICATION

To apply the furnace in a downflow position, it will be necessary to
rotate the vent blower 90° left or right so that the vent pipe passes
through the side of the furnace casing. See Figure 12.

During installation, doors should remain on the furnace when
moving or lifting.

When moving or handling this furnace prior to installation, always leave
the doors on the furnace to provide support and to prevent damage or
warping of the cabinet. When lifting the furnace, support the ends of the
furnace rather than lifting by the cabinet flanges at the return air open­ings (bottom or sides) or supply air opening.

It is acceptable to use the primary heat exchanger tubes as a lifting
point provided that the tubes are lifted at the front of the heat exchang­ers where attached to the vestibule panel. Do not use the top return
bend of the heat exchangers as lifting points as the tubes may shift out
of position or their location brackets/baffles.

SUSPENDED FURNACE / CRAWL SPACE
INSTALLATION

The furnace can be hung from floor joists or installed on suitable blocks
or pads. Blocks or pad installations shall provide adequate height to
ensure that the unit will not be subject to water damage.

8 Johnson Controls Unitary Products

FIGURE 12: Downflow Venting

364861-UIM-H-0712

FRONT

33

A

LEFT SIDE

Combustion Air Inlet

Condensate Drain
(Downflow)

Vent Outlet

Thermostat
Wiring

28.5”

Gas Pipe
Entry

Electrical
Entry

Condensate
Drain

Thermostat
Wiring

RIGHT SIDE

Vent Outlet

Condensate Drain
(Downflow)

14”

1”

1.5”

23”

Combustion Air Inlet

Gas Pipe
Entry

Electrical
Entry

Condensate
Drain

Optional Return Air
Cutout (Either side)

29.5”

(For Cladded door add appoximately an additional .75”)

C

SUPPLY END

.56”

.56”

20”

B

3”

23.8”

.56”

Combustion
Air Inlet

Vent
Outlet

RETURN END

B

24.25”

NOTICE

FIGURE 13: Dimensions

Table 3: Cabinet and Duct Dimensions

BTUH (kW)

Input

Nominal

CFM (m

3

/min)

40 (11.7) 800 (22.7) A 14 1/2 36.8 13 3/8 34.0 11 3/4 29.8 113 (51.3)
60 (17.6) 1000 (28.3) A 14 1/2 36.8 13 3/8 34.0 11 3/4 29.8 118 (53.5)
60 (17.6) 1200 (34.0) B 17 1/2 44.4 16 3/8 41.6 13 1/4 33.7 122 (55.3)
80 (23.4) 1200 (34.0) B 17 1/2 44.4 16 3/8 41.6 14 3/4 37.5 126 (57.2)
80 (23.4) 1600 (45.3) C 21 53.3 19 7/8 50.5 16 1/2 41.9 136 (61.7)

80 (23.4) 2200 (62.3) C 21 53.3 19 7/8 50.5 16 1/2 41.9 139 (63.0)
100 (29.3) 1600 (45.3) C 21 53.3 19 7/8 50.5 18 1/4 46.4 142 (64.4)
100 (29.3) 2000 (56.6) C 21 53.3 19 7/8 50.5 18 1/4 46.4 145 (65.8)
120 (35.1) 1600 (45.3) D 24 1/2 62.2 23 3/8 59.4 21 3/4 55.2 153 (69.4)
120 (35.1) 2000 (56.6) D 24 1/2 62.2 23 3/8 59.4 21 3/4 55.2 156 (70.7)
130 (38.1) 2000 (56.6) D 24 1/2 62.2 23 3/8 59.4 No Hole No Hole 160 (72.5)

SECTION III: FILTERS

FILTER INSTALLATION

All applications require the use of a field installed filter. All filters and
mounting provision must be field supplied.

Filters must be installed external to the furnace cabinet. DO NOT

attempt to install filters inside the furnace.

Single side return above 1800 CFM is approved as long as the filter
velocity does not exceed filter manufacturer’s recommendation and a
transition is used to allow use on a 20x25 filter.

Cabinet

Size

Cabinet Dimensions (Inches)

Approximate

Operating Weights

A (in) A (cm) B (in) B (cm) C (in) C (cm) Lbs (kg)

Table 4: Recommended Filter Sizes (High Velocity 600 FPM)

CFM (m³/min) Cabinet Size Side (in) Bottom (in)

800 (22.7) A 16 x 25 14 x 25
1000 (28.3) A 16 x 25 14 x 25
1200 (34.0) A 16 x 25 14 x 25
1200 (34.0) B 16 x 25 16 x 25
1600 (45.3) B 16 x 25 16 x 25
1600 (45.3) C 16 x 25 20 x 25
2000 (56.6) C (2) 16 x 25 20 x 25
2200 (62.3) C (2) 16 x 25 20 x 25
2000 (56.6) D (2) 16 x 25 22 x 25

1.Air velocity through throwaway type filters may not exceed 300 feet per min-

ute (91.4 m/min). All velocities over this require the use of high velocity fil­ters.

2.Do not exceed 1800 CFM using a single side return and a 16x25 filter. For

CFM greater than 1800, you may use two side returns or one side and the
bottom or one side return with a transition to allow use of a 20x25 filter.

Johnson Controls Unitary Products 9

364861-UIM-H-0712

Front of
Furnace

Corner
Markings

Side of
Furnace

DANGER

INLET

WRENCH
BOSS

INLET
PRESSURE
PORT

ON

OFF

ON/OFF SWITCH
(Shown in ON position)

MAIN REGULATOR
ADJUSTMENT

OUTLET

OUTLET
PRESSURE
PORT

VENT PORT

Upflow

Downflow

Horizontal

External
Manual
Shut-off
Valve

External
Manual
Shut-off
Valve

External Manual
Shut-off Valve

To Gas
Supply

To Gas
Supply

To Gas
Supply

To Gas
Supply

To Gas
Supply

To Gas
Supply

Drip
Leg

Drip
Leg

Drip
Leg

Drip
Leg

Drip Leg

Drip

Gas
Pipe

Gas
Valve

Gas
Pipe

Gas
Valve

Gas
Pipe

Gas
Valve

Ground
Union

Ground
Union

Ground
Union

Ground
Union

Ground
Union

Ground
Union

NOTE: Ground Union maybe installed inside or outside unit.

SIDE RETURN

Locate the “L” shaped corner locators. These indicate the size of the cut­out to be made in the furnace side panel. Refer to Figure 14.

FIGURE 14: Side Return Cutout Markings
Install the side filter rack following the instructions provided with that

accessory. If a filter(s) is provided at another location in the return air
system, the ductwork may be directly attached to the furnace side
panel.

Some accessories such as electronic air cleaners and pleated media
may require a larger side opening. Follow the instructions supplied
with that accessory for side opening requirements. Do not
opening larger than the dimensions shown in Figure 13.

cut the

HORIZONTAL APPLICATION

Horizontal Filters

All filters and mounting provision must be field supplied. All installa­tions must have a filter installed.

Any branch duct (rectangular or round duct) attached to the plenum
must attach to the vertical plenum before the filter. The use of straps
and/or supports is required to support the weight of the external filter
box.

Downflow Filters

Downflow furnaces typically are installed with the filters located above
the furnace, extending into the return air plenum or duct. Any branch
duct (rectangular or round duct) attached to the plenum must attach to
the vertical plenum above the filter height.

Filter(s) may be located in the duct system external to the furnace using
an external duct filter box attached to the furnace plenum or at the end
of the duct in a return filter grille(s). The use of straps and/or supports is
required to support the weight of the external filter box.

SECTION IV: GAS PIPING

GAS SAFETY

An overpressure protection device, such as a pressure regulator,
must be installed in the gas piping system upstream of the furnace
and must act to limit the downstream pressure to the gas valve so it
does not exceed 0.5 psig [14" w.c. (3.48 kPa)]. Pressures exceeding

0.5 psig [14” w.c. (3.48 kPa)] at the gas valve will cause damage to
the gas valve, resulting in a fire or explosion or cause damage to the
furnace or some of its components that will result in property damage
and loss of life.

FIGURE 15: Gas Valve

Plan your gas supply before determining the correct gas pipe entry.
Use 90° service elbow(s), or short nipples and conventional 90°
elbow(s) to enter through the cabinet access holes.

GAS PIPING INSTALLATION

Properly sized wrought iron, approved flexible or steel pipe must be
used when making gas connections to the unit. If local codes allow the
use of a flexible gas appliance connection, always use a new listed con­nector. Do not use a connector that has previously serviced another gas
appliance.

Some utility companies or local codes require pipe sizes larger than the
minimum sizes listed in these instructions and in the codes. The furnace
rating plate and the instructions in this section specify the type of gas
approved for this furnace - only use those approved gases. The instal­lation of a drip leg and ground union is required. Refer to Figure 16.

FIGURE 16: Gas Piping

10 Johnson Controls Unitary Products

An accessible manual shutoff valve must be installed upstream of the

DANGER

furnace gas controls and within 6 feet (1.8 m) of the furnace.

The furnace must be isolated from the gas supply piping system by
closing its individual external manual shutoff valve during any pressure
testing of the gas supply piping system at pressures equal to or less
than 0.5 psig (3.5 kPa).

The gas valve body is a very thin casting that cannot take any exter­nal pressure. Never apply a pipe wrench to the body of the gas valve
when installing piping. A wrench must be placed on the octagon hub
located on the gas inlet side of the valve. Placing a wrench to the
body of the gas valve will damage the valve causing improper opera­tion and/or the valve to leak.

Table 5: Nominal Manifold Pressure - High Fire

Manifold Pressures (in. w.c.) Manifold Pressures (kPa)

Altitude (feet) Altitude (m)

0-7999 8000-8999 9000-9999 0-2437 2438-2742 2743-3048
800 3.5 3.5 3.5
850 3.5 3.5 3.5 31.7 0.87 0.87 0.87
900 3.5 3.5 3.5 33.5 0.87 0.87 0.87
950 3.5 3.5 3.3 35.4 0.87 0.87 0.81

1000 3.5 3.2 2.9 37.3 0.87 0.80 0.73

(BTU/cu ft.)

Gas Heating Value

1050 3.5 2.9 2.7 39.1 0.87 0.73 0.67
1100 3.2 2.7 2.4 41.0 0.80 0.66 0.61

2500 (LP) 9.8 8.2 7.5 93.2 (LP) 2.44 2.03 1.86

364861-UIM-H-0712

Gas piping may be connected from either side of the furnace using any
of the gas pipe entry knockouts on both sides of the furnace. Refer to
Figure 13.

GAS ORIFICE CONVERSION FOR PROPANE (LP)

This furnace is constructed at the factory for natural gas-fired operation,
but may be converted to operate on propane (LP) gas by using a fac­tory-supplied LP conversion kit. Follow the instructions supplied with
the LP kit.

HIGH ALTITUDE GAS ORIFICE CONVERSION

This furnace is constructed at the factory for natural gas-fired operation
at 0 –7,999 feet (0 – 2,438 m) above sea level.

The manifold pressure must be changed in order to maintain proper
and safe operation when the furnace is installed in a location where the
altitude is greater than 7,999 feet (2,438 m) above sea level. Refer to
Table 5 for proper manifold pressure settings.

HIGH ALTITUDE PRESSURE SWITCH CONVERSION

For installation where the altitude is less than 5,000 feet (1,524m), it is
not required that the pressure switch be changed unless you are in an
area subject to low pressure inversions.

29.8 0.87 0.87 0.87

(MJ/cu m)

Gas Heating Value

PROPANE AND HIGH ALTITUDE CONVERSION KITS

It is very important to choose the correct kit and/or gas orifices for the altitude and the type of gas for which the furnace is being installed.
Only use natural gas in furnaces designed for natural gas. Only use propane (LP) gas for furnaces that have been properly converted to use pro­pane (LP) gas. Do not use this furnace with butane gas.
Incorrect gas orifices or a furnace that has been improperly converted will create an extremely dangerous condition resulting in premature heat

exchanger failure, excessive sooting, high levels of carbon monoxide, personal injury, property damage, a fire hazard and/or death.
High altitude and propane (LP) conversions are required in order for the appliance to satisfactory meet the application.
An authorized distributor or dealer must make all gas conversions.
In Canada, a certified conversion station or other qualified agency, using factory specified and/or approved parts, must perform the conversion.

The installer must take every precaution to insure that the furnace has been converted to the proper gas orifice size when the furnace is installed.
Do not attempt to drill out any orifices to obtain the proper orifice size. Drilling out a gas orifice will cause misalignment of the burner flames, caus­ing premature heat exchanger burnout, high levels of carbon monoxide, excessive sooting, a fire hazard, personal injury, property damage and/or
death.

SECTION V: ELECTRICAL POWER

ELECTRICAL POWER CONNECTIONS

Field wiring to the unit must be grounded. Electric wires that are field
installed shall conform to the temperature limitation for 63°F (35°C) rise
wire when installed in accordance with instructions. Refer to Table 6 in
these instructions for specific furnace electrical data.

Use copper conductors only.

Johnson Controls Unitary Products 11

364861-UIM-H-0712

Electrical Entry

Junction
Box

L1-Hot

Neutral

Connect ground
lead to screw

BLK
WHT

Table 6: Ratings & Physical / Electrical Data

Input Output

Nominal

MBH kW MBH kW CFM

Airflow

3

m

/min

AFUE

%

Air Temp. Rise

°F °C °F °C HP Amps

Max. Outlet

Air Temp

Blower

Blower

Size

Max

Over-Current

Protect

Total Unit

Amps

Min. wire Size

(awg) @ 75 ft

one way

40 11.7 38 11.1 800 22.7 95.5 30-60 17-33 160 71.1 1/3 4.8 11x8 15 8.0 14
60 17.6 57 16.7 1000 28.3 95.5 30-60 19-36 160 71.1 1/2 7.07 11x8 15 10.0 14
60 17.6 57 16.7 1200 34.0 95.5 30-60 19-36 160 71.1 1/2 7.07 11x8 15 10.0 14
80 23.4 76 22.3 1200 34.0 95.5 35-65 19-36 165 73.9 1/2 7.07 11x8 15 10.0 14
80 23.4 76 22.3 1600 45.3 95.5 35-65 19-36 165 73.9 3/4 8.8 11x10 15 11.5 14

80 23.4 76 22.3 2200 62.3 95.5 35-65 19-36 165 73.9 1 14.5 11x11 20 17.0 12
100 29.3 95 27.8 1600 45.3 95.5 35-65 19-36 165 73.9 3/4 8.8 11x10 15 11.5 14
100 29.3 95 27.8 2000 56.6 95.5 35-65 19-36 165 73.9 1 14.5 11x11 20 17.0 12
120 35.1 114 33.4 1600 45.3 95.5 40-70 22-39 170 76.7 3/4 8.8 11x10 15 11.5 14
120 35.1 114 33.4 2000 56.6 95.5 35-65 19-36 165 73.9 1 14.5 11x11 20 17.0 12
130 38.1 123.5 36.2 2000 56.6 95.5 45-75 28-44 175 79.4 1 14.5 11x11 20 17.0 12

Annual Fuel Utilization Efficiency (AFUE) numbers are determined in accordance with DOE Test procedures.
Wire size and over current protection must comply with the National Electrical Code (NFPA-70-latest edition) and all local codes.
The furnace shall be installed so that the electrical components are protected from water.

SUPPLY VOLTAGE CONNECTIONS

The power connection leads and wiring box may be relocated to the
left side of the furnace. Remove the screws and cut wire tie holding
excess wiring. Reposition on the left side of the furnace and fasten
using holes provided.

FIGURE 17: Electrical Wiring

1. Provide a power supply separate from all other circuits. Install over­current protection and disconnect switch per local/national electrical
codes. The switch should be close to the unit for convenience in
servicing. With the disconnect or fused switch in the OFF position,
check all wiring against the unit wiring label. Refer to the wiring dia­gram in this instruction.

2. Remove the wiring box cover screws. Route all power wiring
through a conduit connector or other proper bushing that has been
installed into the unit opening and the junction box. In the junction
box there is a black wire, a white wire and a green ground screw.
Connect the power supply as shown on the unit’s wiring label on
the inside of the blower compartment door or the wiring schematic
in this section. Connect the black wire to L1 (hot) from the power
supply. Connect the white wired to neutral. Connect the ground wire
(installer-supplied) to the green (equipment ground) screw. An
alternate wiring method is to use a field-provided 2” (5.1 cm) x 4”
(10.2 cm) box and cover on the outside of the furnace. Route the
furnace leads into the box using a protective bushing where the
wires pass through the furnace panel. After making the wiring con­nections replace the wiring box cover and screws. Refer to Figure

17.

3. The furnace's control system requires correct polarity of the power
supply and a proper ground connection. Refer to Figure 17.

LOW VOLTAGE CONTROL WIRING CONNECTIONS

Install the field-supplied thermostat by following the instructions that
come with the thermostat. With the thermostat set in the OFF position
and the main electrical source disconnected, connect the thermostat
wiring from the wiring connections on the thermostat to the terminal
board on the ignition module, as shown in Figure 17. Electronic thermo­stats may require the common wire to be connected. Apply strain relief
to thermostat wires passing through cabinet. If air conditioning equip­ment is installed, use thermostat wiring to connect the Y and C termi­nals on the furnace control board to the proper wires on the condensing
unit (unit outside).

Set the heat anticipator in the room thermostat to 0.4 amps. Setting it
lower will cause short cycles. Setting it higher will cause the room
temperature to exceed the set points.

Some electronic thermostats do not have adjustable heat anticipa­tors. They should be set to six cycles per hour. Follow the thermostat
manufacturer's instructions.

The 24-volt, 40 VA transformer is sized for the furnace components
only, and should not be connected to power auxiliary devices such as
humidifiers, air cleaners, etc. The transformer may provide power for an
air conditioning unit contactor.

12 Johnson Controls Unitary Products