Harman® • PF-120 Installation Manual_R1 • 2014 -___ • 03/14
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3-90-08121i
Access Panel
Cover opening
Flex connector
Top
Figure 5.6
Figure 5.7
Assembling Filter Box, Cont’d
5. Place the top on the filter box as shown in Figure 5.6. At this
time all Tek screws can be inserted around the filter box.
Note:
Except for the (6) screws that attach the blower access
panel in place.
There should not be any screws protruding from the box on
the side toward the furnace. Also DO NOT put a screw into
the top center of the filter panel as a screw in this location
will interfere with the filter access cover.
6. Pry out the two knockouts in the top of the box and install
the flex connector and the switch. See Figure 5.7.
Note:
Make sure that the setscrew on the flex connector is not
pointing toward the furnace end of the box when the
locknut is fully tightened. The filter box is now ready to
install onto the furnace.
Note:
The blower should be mounted on the furnace before
the filter box for ease of distribution blower installation.
Note:
It is best to wait until the blower, filter box, and cold
air return duct work is installed before installing the filter and
side panel.
7. After the Filter Box is installed on the furnace the electrical
wiring needs to be completed. A decision must be made
as to which speed suites your installation.
Black - Hi
Yellow - Med-Hi
Orange - Med-Low
Red
- Low
(Note: the purple wire on the 1638 cfm blower is neutral,
and gets spliced to the white neutral wire.)
8. Install the access panel cover by hooking the lip at the
bottom of the cover over the edge in the filter box. Use 6
Tek screws to secure the access panel.
