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NOTE: The 1/2 hp blower motor used in this unit is equipped
with three flexible legs and one rigid leg. The rigid leg is
equipped with a shipping bolt and a flat white plastic washer
(rather than the rubber mounting grommet used with a flexible
mounting leg). The bolt and washer must be removed
before the furnace is placed into operation. After the
bolt and washer have been removed, the rigid leg will not
touch the blower housing.
Allow for clearances to combustible materials as indicated
on the unit nameplate. Minimum clearances for closet or
alcove installations are shown in Figure 7.
WARNING
Blower access panel must be securely in place when
blower and burners are operating. Gas fumes, which
could contain carbon monoxide, can be drawn into living
space resulting in personal injury or death.
WARNING
Improper installation of the furnace can result in personal
injury or death. Combustion and flue products must
never be allowed to enter the return air system or air in
the living space. Use sheet metal screws and joint tape
to seal return air system to furnace.
In platform installations with furnace return, the furnace
should be sealed airtight to the return air plenum. A
door must never be used as a portion of the return air
duct system. The base must provide a stable support
and an airtight seal to the furnace. Allow absolutely no
sagging, cracks, gaps, etc.
For no reason should return and supply air duct systems
ever be connected to or from other heating devices such
as a fireplace or stove, etc. Fire, explosion, carbon
monoxide poisoning, personal injury and/or property
damage could result.
506552-01
1/2 HP BLOWER MOTOR
Figure 6
The unit may be installed three ways in downflow
applications: on non-combustible flooring, on combustible
flooring using a base, or on a reverse flow cooling coil
cabinet. Do not drag the unit across the floor in the downflow
position. Flange damage will result.
Refer to Figure 7 for clearances in downflow applications.
Downflow Application Installation Clearances
* Front clearance in alcove installation must be 24 in. (610 mm).
Maintain a minimum of 24 in. (610 mm) for front service access.
† Allow proper clearances to accommodate condensate trap and
vent pipe installation.
‡ The furnace may be Installed on a combustible wood floor if an
optional base is installed between the furnace and the combustible
floor.
Installation on Non-Combustible Flooring (Figure 8)
1. Cut floor opening keeping in mind clearances listed on
unit rating plate. Also keep in mind gas supply
connections, electrical supply, flue and air intake
connections and sufficient installation and servicing
clearances. See Table 1 for correct floor opening size.
2. Flange warm air plenum and lower the plenum into the
opening.
3. Set the unit over the plenum and seal the plenum to the
unit.
4. Ensure that the seal is adequate.
Issue 1034
Figure 7
Page 7 of 52
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