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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.
Page 10 of 56
Tilt the unit slightly (Max. 1/2") from back to front to aid in the draining of the heat exchanger.
Unit must be level side-to-side in all applications.
Figure 12. Setting Equipment
WARNING
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.
‡ For installations on a combustible floor, do not install
the furnace directly on carpeting, tile or other combustible
materials other than wood flooring.
Figure 13. Installation Clearances
Issue 2223
Top
Right Side
Bottom (Floor)
1 in. (25 mm)
Upflow Applications
507768-05G / 31-5000655
0
0
0†
0
0‡
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