16
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 11), it is recommended
that the drip pan extend at least 12 inches past the top
and front of the furnace.
If the furnace will be suspended from the ceiling, assemble
a support frame (Figure 12) 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.
NOTE: 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 fire hazard
that cement board or sheet metal be placed between the
furnace and the combustible floor and extend 12 inches
beyond the front of the door and top of the furnace.
FURNACE INSTALLATION
*TC series gas furnaces offer a wide range of installation
options, including installation in the upflow or horizontal
positions with either right, left, or upflow return air. The
*TL series gas furnaces may only be installed as a down
flow application.
GeneralRequirements
• Thefurnacemustbeleveledatinstallationandattached
to a properly installed duct system. See Figure 1 (page 6)
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. (If applicable)
• Thecabinetplugmustalwaysbeusedtoclosethehole
in the side of the furnace when rotating the inducer.
• The furnace requires special venting materials and
installation procedures. See pages 7 - 10 for
venting guidelines and specifications.
Upflow Furnaces
WARNING:
Thefurnacemustnotbeinstalleddirectlyon
carpeting,tile,oranycombustiblematerialother
thanwoodooring.
*TC series gas furnaces are shipped with the bottom
panel installed as shown in Figure 28. If the furnace is
installed with side return air, the bottom panel must not
be removed. If the furnace is installed with bottom return
air, the bottom panel must be removed. See Bottom Panel
Removal on page 20.
Horizontal Furnaces
WARNING:
Thefurnacemustnotbeinstalleddirectlyon
carpeting,tile,oranycombustiblematerialother
thanwoodooring.
The *TC series gas furnace can be installed horizontally
(Figure 11) 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 airflow or left to right
airflow as shown in Figure 12.
*TC series furnaces are shipped with the bottom panel
installed. If furnace is installed horizontally, remove the
bottom panel from the furnace before attaching the duct
system. See Bottom Panel Removal section (page 20).
Figure11.*TCHorizontallyInstalledonaPlatform
Flue pipe vented
to outside
J-Trap
Height
3” Min.
Coil Plenum
Wood or
non-combustible
platform
Combustion Air
Condensate
Drain Lines
Lag
Bolt
Nuts (x2)
Washer
and
Lockwasher
Nuts (x2)
Threaded
Rod
Figure12.*TCHorizontallySuspendedinAttic
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