5894307-UIM-B-0920
Johnson Controls Ducted Systems
3
CODES AND STANDARDS
Follow all national and local codes and standards in addition to this
installation manual. The installation must comply with regulations of the
serving gas supplier, local building, heating, and plumbing codes, and
other codes. In the absence of local codes, the installation must comply
with the national codes listed below and all authorities having jurisdic-
tion.
In the United States and Canada, follow all codes and standards for the
following, using the latest edition available:
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. Natu-
ral Gas and Propane Installation Codes (NSCNGPIC)
General Installation
• US: Current edition of the NFGC and NFPA 90B. For copies, con-
tact:
National Fire Protection Association Inc.
Batterymarch Park
Quincy, MA 02269
or for only the NFGC, contact:
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
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
Duct Systems
• US and CANADA: Air Conditioning Contractors Association
(ACCA) Manual D, Sheet Metal and Air Conditioning Contractors
Association National Association (SMACNA), or American Soci-
ety of Heating, Refrigeration, and Air Conditioning Engineers
(ASHRAE) 1997 Fundamentals Handbook Chapter 32.
Acoustical Lining and Fibrous Glass Duct
• US and CANADA: Current edition of SMACNA and NFPA 90B as
tested by UL Standard 181 for Class
1
Rigid Air Ducts
Gas Piping and Gas Pipe Pressure Testing
• US: NFGC - chapters 2, 3, 4, and 9 and National Plumbing Codes
• CANADA: NSCNGPIC Part 5
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 exist-
ing national standards and safety codes. In some instances, these
instructions exceed certain local codes and ordinances, especially
those that do not reflect changing residential and non-HUD modular
home construction practices. These instructions are required as a mini-
mum for a safe installation.
INSPECTION
On receiving a unit, inspect the unit for possible damage during transit.
If damage is evident, note the extent of the damage on the carrier’s
freight bill. Make a separate request for inspection by the carrier’s agent
in writing. Before installation, check the unit for screws or bolts that may
have loosened in transit. There are no shipping or spacer brackets that
need to be removed from the interior of this unit.
FURNACE LOCATION AND CLEARANCES
Locate the furnace using the following guidelines:
• Where a minimum amount of air intake/vent piping and elbows
are required
• As centralized with the air distribution as possible
• Where adequate combustion air is available (particularly when
the appliance is not using outdoor combustion air)
• Where it does not interfere with correct air circulation in the con-
fined space
• Where the outdoor vent terminal is not blocked or restricted. See
the VENT CLEARANCES section. These minimum clearances
must be maintained in the installation.
• Where the unit is installed in a level position side-to-side. The unit
must be installed with a slight (1/4 in.) slope toward the front of
the unit to assist in condensate drainage.
Installation in freezing temperatures:
• Install the furnace 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.
• Do not allow the return air temperature to be below 55ºF (13°C)
for extended periods. To do so can cause condensation to occur
in the main heat exchanger, leading to premature heat exchanger
failure.
• If this furnace is installed in an unconditioned space and an
extended power failure occurs, there is potential for damage to
the internal components. Following a power failure, do not oper-
ate the unit until inspection and repairs are performed.
Clearances for access/service:
Provide ample clearances to permit easy access to the unit. The follow-
ing minimum clearances are recommended:
• 24 in. (61 cm) between the front of the furnace and an adjacent
wall or another appliance, when access is required for servicing
and cleaning
• 18 in. (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 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 burners and the ignition source are located not less than
18 in. (46 cm) above the floor, and the furnace must be located or pro-
tected to avoid physical damage by vehicles.
WARNING
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 clean-
ers 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.
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WARNING
Improper installation in an ambient below 32ºF (0.0° C) could create a
hazard, resulting in damage, injury or death.
WARNING
Liquid anti-freeze will cause damage to internal plastic parts of this
furnace.
DO NOT attempt to winterize the furnace using liquid
anti-freeze.
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