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Installation
Setting Equipment
Do not connect the return air ducts to the back of the
furnace. Doing so will adversely affect the operation of
the safety control devices, which could result in personal
injury or death.
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.
Upflow Applications
The gas furnaces can be installed as shipped in the upflow
position. Refer to Figure 12 for clearances. Select a location
that allows for the required clearances that are listed on
the unit nameplate. Also consider gas supply connections,
electrical supply, vent connection, condensate trap and
drain connections, and installation and service clearances
[24 inches (610 mm) at unit front]. The unit must be level
from side to side. Tilt the unit slightly (maximum 1/2 in.
from level) from back to front to aid in the draining of the
heat exchanger. See Figure 13.
Page 10 of 60
WARNING
WARNING
Unit must be level side-to-side in all applications.
Tilt the unit slightly (Max. 1/2") from back to front to aid in the draining of the heat exchanger.
Figure 13. Setting Equipment
Allow for clearances to combustible materials as indicated
on the unit nameplate.
Left Side
Top/Plenum
*Front
Back
Sides
Vent
Floor
* 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.
‡ For installations on a combustible floor, do not install
the furnace directly on carpeting, tile or other combustible
materials other than wood flooring.
Figure 12. Installation Clearances
Issue 2332
Top
Right Side
Bottom (floor)
1 in. (25 mm)
0
0
0†
0
0‡
508404-01
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