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Refrigerant
Line Knockouts
Blower Selector
Switch (EH Only)
DOWNFLOW INSTALLATION
Figure 16. Downflow and Upflow Installations
Refer to instructions supplied with acces-
sory equipment.
3.
Remove unit front door and slide back until
bottom slots in rear of unit engage with both
tabs of optional rear mounting plate, OR...
If mounting plate is not used, an equivalent
method of securing the rear of the unit may
be used as long as it prevents displace-
ment during transport if used in a manufac-
tured home.
Upflow Duct
Connector
Furnace
Upflow Stand
Filters
Figure 17. Over-the-Floor Return Air
System with Upflow Stand
16
Power
Supply
Wire
Entrances
Power
Supply
Wire
Entrances
Tie Down Tab
Tie-Down Tab
(See Inset)
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.
5.
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
• The 2 Wire Relay Control is NOT recom-
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
Low Voltage
Wire Entrances
UPFLOW INSTALLATION
Secure front of unit with one or more fas-
teners at mounting hole(s) provided or at
tie-down tab (see Figure 16).
See Electrical System Installation to com-
plete furnace installation.
clearances for the installation and future
servicing of the furnace. Refer to Table 1.
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.
Refrigerant
Line
Knockouts
Blower Selector
Switch (EH Only)
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