13
Figure 8. *SA Horizontal Installation on a Platform
Gas Inlet
Wood or
non-combustible
Platform
Type “B” Vent
Coil Plenum
Electrical Supply
Connection
Figure 9. *SA Horizontally Suspended in Attic
Threaded
Rod
Lag
Bolt
Nuts (x2)
Washer
and
Lockwasher
Nuts (x2)
WARNING:
The downfl ow sub-base kit must not be installed
directly on carpeting, tile, or any combustible
material other than wood fl ooring.
A downfl ow 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 fl oor according to the
dimensions in Figure 6.
2. Position the plenum and the furnace as shown in
Figure 7.
“A”
“B”
Opening in concrete floor
*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.
Figure 6. Cutout Dimensions
If suspending the furnace from the ceiling, assemble a
support frame (Figure 9) using slotted iron channel and
full threaded rod. Fasten the frame together with nuts,
washers, and lockwashers. Secure the support frame to the
rafters with lag bolts. The furnace can also be suspended
using steel straps around each end of the furnace. The
straps should be attached to the furnace with sheet metal
screws and to the rafters with bolts.
It is recommended for further reduction of fi re hazard
that cement board or sheet metal be placed between the
furnace and the combustible fl oor and extend 12 inches
beyond the front of the door and top of the furnace.
Concrete
Floor
Furnace
Sheet
Metal
Plenum
Figure 7. Furnace on a Concrete Slab
Horizontal Installation
WARNING:
The furnace must not be installed directly on
carpeting, tile, or any combustible material other
than wood fl ooring.
The *SA series gas furnace can be installed horizontally
(Figure 8) in an attic, basement, crawl space or alcove.
It can also be suspended from a ceiling in a basement
or utility room in either a right to left airfl ow or left to right
airfl ow as shown in Figure 9.
*SA series furnaces are shipped with the bottom panel
installed. If the furnace is installed horizontally, remove
the bottom panel from the furnace before attaching the
duct system. See Bottom Panel Removal on page 14.
If installing the furnace in an attic, it is required that a drip
pan be placed under the furnace. If the installation is on a
combustible platform (Figure 8), it is recommended that
the drip pan extend at least 12 inches past the top and
front of the furnace.
Summary of Contents for *SA Upfl ow / Horizontal
Page 35: ...35...
