Step 1—Location
GENERAL
DO NOT install furnace in a corrosive or contaminated
atmosphere. Make sure all combustion and circulating air
requirements are followed.
DO NOT use this furnace during construction when adhe-
sives, 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 systems. Some of these compounds are released
from paneling and dry wall adhesives, paints, thinners,
masonry cleaning materials, and many other solvents com-
monly used in the construction process.
This furnace must be installed so the electrical components are
protected from water.
Locate the furnace as near to the center of the air distribution
system and the chimney or vent as possible. The furnace should be
installed as level as possible.
When a furnace is installed so that the supply ducts carry air to
areas outside the space containing the furnace, the 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 the unit
clearance label. This furnace shall not be installed directly on
carpeting, tile, or any combustible material other than wood
flooring. The furnace may be installed on combustible flooring
when installed with the accessory downflow subbase, which is
available from your distributor or branch when required.
LOCATION RELATIVE TO COOLING EQUIPMENT
The cooling coil must be installed parallel with or on the
downstream side of the furnace to avoid condensation in the heat
exchangers. When installed parallel with a furnace, dampers or
other means used to control the flow of air 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-cooling position.
HAZARDOUS LOCATIONS
When the furnace is installed in a residential garage, it must be
installed so that the burners and ignition source are at least 18 in.
above the floor. The furnace should be protected from physical
damage by vehicles.
When a furnace is installed in public garages, airplane hangars, or
other buildings having hazardous atmospheres, the unit must be
installed in accordance with the recommended good practice
requirements of the National Fire Protection Association, Inc.
Step 2—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.
Fig. 1—Dimensional Drawing
A88324
Table 2—Dimensions (In.)
UNIT SIZE
A
D
E
VENT CONN
SHIP. WT
065-08
14-3/16
12-9/16
12-11/16
4
141
065-12
14-3/16
12-9/16
12-11/16
4
145
085-12
17-1/2
15-7/8
16
4
154
085-16
17-1/2
15-7/8
16
4
154
105-20
21
19-3/8
19-1/2
4
181
125-20
24-1/2
22-7/8
23
5
192
3