Installation Guide

14
Figure8.*SAHorizontallySuspendedinAttic
Threaded
Rod
Lag
Bolt
Nuts (x2)
Washer
and
Lockwasher
Nuts (x2)
Concrete
Floor
Furnace
Sheet
Metal
Plenum
Figure9.FurnaceonaConcreteSlab
*SKModels Dim.“A” Dim.“B”
054-23A 13 1/4 19 1/4
072-24B 16 5/8 19 1/4
090-24B 16 5/8 19 1/4
108-35C 20 1/8 19 1/4
126-45D 23 5/8 19 1/4
NOTE: Dimensions shown in Inches.
Table1.CutoutDimensions
“A”
“B”
Opening in concrete floor
DownowInstallation
Thefurnacemustnotbeinstalleddirectlyoncarpeting,
tile, or any combustible material other than wood
ooring. To install the furnace on combustible flooring,
a special sub-base is required.
wARNING:
Failuretoinstallthedownowsub-basekitmay
resultinre,propertydamageorpersonalinjury.
wARNING:
Thedownowsub-basekitmustnotbeinstalled
directlyoncarpeting,tile,oranycombustible
materialother than woodooring.Failureto
complymayresultinre,propertydamageor
personalinjury.
Downflow sub-base kits are factory supplied accessories
and are listed according to the cabinet letter of the furnace.
For ‘A’ size cabinets use Sub-Base kit #902974 only. For
‘B’, ‘C’, and ‘D’ size cabinets use Kit #904911. please
followtheinstructionsprovidedwiththekit.
A downflow sub-base kit is not necessary if the furnace
is installed on a factory or site-built cased air conditioning
coil. However, the plenum attached to the coil casing
must be installed so that its surfaces are at least 1” from
combustible construction.
Installation on a Concrete Slab
1. Create an opening in the floor according to the
dimensions in Table 1.
2. Position the plenum and the furnace as shown in
Figure 9.