6. Before removing a new control from its container, dis-
charge 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 5 before bringing the
control or yourself into contact with the furnace. Put all
used AND new controls into containers before touching
ungrounded objects.
7. An ESD service kit (available from commercial sources)
may also be used to prevent ESD damage.
LOCATION
I. GENERAL
CAUTION: 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.
CAUTION: Do not use this furnace during construction
when adhesives, sealers, and/or new carpets are being
installed and curing. If the furnace is required during
construction, use clean outside air for combustion and
ventilation. Compounds of chlorine and fluorine, when
burned in combustion air, form acids which will cause
corrosion of the heat exchangers and metal vent system.
Some of these compounds are released from paneling and
dry wall adhesives, paints, thinners, masonry cleaning
materials, and many other solvents commonly used in the
construction process. Excessive exposure to contami-
nated combustion air will result in safety and perfor-
mance related problems.
WARNING: Do not install the furnace on its back,
safety controls will be adversely affected. Never connect
return-air ducts to back of furnace. Failure to follow this
warning could result in fire, personal injury, or death.
(See Fig. 4.)
This furnace must be installed so the electrical components are
protected from water.
Locate furnace as near the center of the air distribution system and
chimney or vent as possible. The furnace should be installed as
level as possible. When a furnace is installed so that supply ducts
carry air to areas outside the space containing the furnace, return
air must also be handled by a duct(s) sealed to the furnace casing
and terminating outside the space containing the furnace.
Provide ample space for servicing and cleaning. Always comply
with the minimum fire protection clearances shown on furnace
clearance-to-combustible construction label. This furnace shall not
be installed directly on carpeting, tile, or any combustible material
other than wood flooring.
II. LOCATION RELATIVE TO COOLING EQUIPMENT
The cooling coil must be installed parallel with or on downstream
side of furnace to avoid condensation in heat exchangers. When
installed parallel with a furnace, dampers or other means used to
control flow of air must prevent chilled air from entering furnace.
If dampers are manually operated, they must be equipped with
means to prevent operation of either unit unless damper is in
full-heat or full-cool position.
III. HAZARDOUS LOCATIONS
WARNING: When furnace is installed in a residential
garage, it must be installed so that burners and ignition
sources are located a minimum of 18 in. above floor. The
furnace must be located or protected to avoid physical
damage by vehicles. When furnace is installed in a public
garage, airplane hangar, or other building having a
hazardous atmosphere, unit must be installed in accor-
dance with requirements of National Fire Protection
Association, Inc. (See Fig. 5.)
AIR FOR COMBUSTION AND VENTILATION
Provisions for adequate combustion and ventilation air must be
provided in accordance with Section 5.3, Air for Combustion and
Ventilation, of the NFGC or applicable provisions of the local
building codes.
Canadian installations must be in accordance with NSCNGPIC
and all authorities having jurisdiction.
CAUTION: Air for combustion must not be contami-
nated by halogen compounds, which include fluoride,
chloride, bromide, and iodide. These elements are found
in aerosol sprays, detergents, bleaches, cleaning solvents,
salts, air fresheners, and other household products.
All fuel-burning equipment must be supplied with air for combus-
tion of fuel. Sufficient air MUST be provided to ensure there will
not be a negative pressure in the equipment room or space. In
addition, a positive seal MUST be made between furnace cabinet
and return-air duct to prevent pulling air from burner area and draft
safeguard opening into the circulating air.
Fig. 4—Prohibit Installation on Back
A93043
FRONT
BACK
FRONT
B
A
C
K
Fig. 5—Installation in a Garage
A93044
18-IN. MINIMUM
TO BURNERS
—4—
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