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368262-UIM-B-1008
Johnson Controls Unitary Products 3
COMBUSTION AIR QUALITY
(LIST OF CONTAMINANTS)
The furnace requires OUTDOOR AIR for combustion when the furnace
is located in any of the following environments.
• Restricted Environments
• Commercial buildings
• Buildings with indoor pools
• Furnaces installed in laundry rooms
• Furnaces installed in hobby or craft rooms
• Furnaces installed near chemical storage areas
• Chemical exposure
The furnace requires OUTDOOR AIR for combustion when the furnace
is located in an area where the furnace is being exposed to the follow-
ing substances and / or chemicals.
• 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
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 installa-
tion manual. The installation must comply with regulations of the serv-
ing 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. Natu-
ral Gas and Propane Installation Codes (NSCNGPIC)
STEP 2 -General Installation
• US: Current edition of the NFGC and NFPA 90B. For copies, con-
tact 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 Soci-
ety 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 exist-
ing 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.
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 fur-
nace.
1. Spray or aerosol cans, rags, brooms, dust mops, vacuum
cleaners or other cleaning tools.
2. Soap powders, bleaches, waxes or other cleaning com-
pounds; plastic items or containers; gasoline, kerosene, ciga-
rette 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.