9
FURNACE INSTALLATION
General Requirements
*SA series gas furnaces are shipped ready for installation
in the upfl ow or horizontal right or left positions. Only
the *SK series gas furnace may be used for downfl ow
operation.
• The furnace must be leveled at installation and attached
to a properly installed duct system. See Table 1 (page
23) for the required clearances needed to move the
furnace to its installation point (hallways, doorways,
stairs, etc).
• The furnace must be installed so that all electrical
components are protected from water.
• The furnace must be installed upstream from a
refrigeration system.
• Additional reference information for US and Canadian
installations can be found in the General Installation
section (page 4).
Upfl ow Installation
The *SA series gas furnace may be installed directly on
combustible wood fl ooring or supports.
This furnace
must not be installed directly on carpeting, tile, or
any combustible material other than wood fl ooring.
For venting guidelines and specifi cations, see Venting
Requirements section (pages 12 - 13).
Side Return Air Inlet
*SA series gas furnaces are shipped with the bottom
panel installed (Figure 15, page 24). If the upfl ow furnace
is installed with side return air, the bottom panel must not
be removed.
Bottom Return Air Inlet
*SA series gas furnaces are shipped with the bottom
panel installed. If the upfl ow furnace is installed with
bottom return air, the bottom panel must be removed.
See Bottom Panel Removal on page 10.
Horizontal Installation
The *SA series gas furnace can be installed horizontally
in an attic, basement, crawl space or alcove (Figure 6).
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 7.
*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 10.
If the furnace is to be suspended from the ceiling, it will
be necessary to use 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. The
furnace could also be suspended by an angle iron frame
bolted to the rafters (Figure 7).
Access for positioning and servicing must be considered
when locating the unit. See Table 1 (page 23) for clearance
specifi cations.
If the furnace is to be installed in an attic, it is required that
a drip pan be placed under the furnace. If the installation
is on a combustible platform (Figure 6), it is recommended
that the drip pan extend at least 12 inches past the top
and front of the furnace.
WARNING:
The furnace must not be installed directly on
carpeting, tile, or any combustible material other
than wood fl ooring.
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.
Figure 6. *SA Horizontal Installation on a Platform
Gas Inlet
Combustible
Platform
Type “B” Vent
Note: Line Contact
Is Permissible
Coil Plenum
Electrical Supply
Connection
Figure 7. *SA Horizontal Installation
Suspended in Attic or Crawl Space
Summary of Contents for 045C-23ASA
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