15
be used as long as it prevents displace-
ment during transport if used in a manufac-
tured home.
NOTE: The furnace does not need to be hard
up against the rear mounting plate. The tabs will
engage into the slots and allow approximately
1/2” of furnace adjustment front to back and right
to left.
4.
Secure front of unit with one or more fas-
teners at mounting hole(s) provided or at
tie-down tab (see Figure 16).
Figure 17. Over-the-Floor Return Air
System with Upflow Stand
Upflow Duct
Connector
Furnace
Filters
Upflow Stand
Low Voltage Wire Entr
ances
Refrigerant
Line Knockouts
Blower Selector
Switch (EH Only)
Tie-Down Tab
(See Inset)
Power
Supply
Wire
Entrances
Power
Supply
Wire
Entrances
Blower Selector
Switch (EH Only)
Refrigerant
Line
Knockouts
Low Voltage
Wire Entrances
Figure 16. Downflow and Upflow Installations
Tie Down Tab
DOWNFLOW INSTALLATION
UPFLOW INSTALLATION
5.
See Electrical System Installation to com-
plete furnace installation.
TYPICAL INSTALLATION OF
UPFLOW SYSTEMS
The following steps describe installation in-
structions for an overhead supply duct system
with a return air system that can be either over
the floor (non-ducted) or through the floor
(ducted).
NOTES:
• Before installing this furnace, consider all
clearances for the installation and future
servicing of the furnace. Refer to Table 1.
• The 2 Wire Relay Control is NOT recom-
mended for upflow applications, instead, the
AC/HP Relay Control (4-7 wire) should be
used when converting some models to ac-
cept an air conditioner. See Relay Control
installation instructions for further details.
Return Air and Filtering Systems
Furnaces may be installed with non-ducted or
ducted return air. For non-ducted systems with
air conditioners or heat pumps, the following
optional equipment is recommended: upflow
stand, coil cabinet, upflow duct connector, and
wall mount grille. For ducted systems with air
conditioners or heat pumps, the following op-
tional equipment is recommended: coil cabinet
and upflow duct connector.