INSTALLATION INSTRUCTIONS Gas Furnace: WFAR
440 01 7104 02 9
Specifications subject to change without notice.
See Table 1 for loose parts bag contents.
This furnace must:
S be installed so the electrical components are
protected from water.
S not be installed directly on any combustible material
other than wood flooring (refer to SAFETY
CONSIDERATIONS).
S be located close to the chimney or vent and attached
to an air distribution system. Refer to Air Ducts
section.
S be provided ample space for servicing and cleaning.
Always comply with minimum fire protection
clearances shown in Table 2 or on the furnace
clearance to combustible construction label.
CARBON MONOXIDE POISONING /
COMPONENT DAMAGE 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.
!
WARNING
The following types of furnace installations may require
OUTDOOR AIR for combustion due to chemical exposures:
S Commercial buildings
S Buildings with indoor pools
S Laundry rooms
S Hobby or craft rooms
S Chemical storage areas
If air is exposed to the following substances, it should not be
used for combustion air, and outdoor air may be required for
combustion:
S Permanent wave solutions
S Chlorinated waxes and cleaners
S Chlorine based swimming pool chemicals
S Water softening chemicals
S De--icing salts or chemicals
S Carbon tetrachloride
S Halogen type refrigerants
S Cleaning solvents (such as perchloroethylene)
S Printing inks, paint removers, varnishes, etc.
S Hydrochloric acid
S Cements and glues
S Antistatic fabric softeners for clothes dryers
S Masonry acid washing 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.
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 in. (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 NFPA 54/ANSI
Z223.1--2012 or CAN/CSA B149.2--2010. (See
Figure 5.)
!
WARNING
FIRE 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. (See Figure 4.)
!
WARNING
Location Relative to Cooling Equipment
The cooling coil must be installed parallel with, or on the
downstream side of the unit to avoid condensation in the heat
exchangers. When installed parallel with the furnace, dampers
or other flow control must prevent chilled air from entering the
furnace. If the dampers are manually operated, they must be
equipped with means to prevent operation of either unit unless
the damper is in the full--heat or full--cool position.
AIR FOR COMBUSTION AND
VENTILATION
Introduction
Direct Vent (2--pipe) Applications
When the furnace is installed as a direct vent (2-pipe) furnace,
no special provisions for air for combustion are required.
However, other gas appliances installed in the space with the
furnace may require outside air for combustion. Follow the
guidelines below to insure that other gas appliances have
sufficient air for combustion.
Non--Direct Vent (1--pipe) Applications
When the furnace is installed as a non-direct vent (1-pipe)
furnace, it will be necessary to insure there is adequate air for
combustion. Other gas appliances installed with the furnace
may also require air for combustion and ventilation in addition
to the amount of combustion air and ventilation air required for
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