Manual 2100-392
Page 21
COUNTERFLOW MODELS – FILTER
LOCATIONS
Counterflow models normally have filters installed in
the return air plenum above the furnace unless a
common return air/filter grille is used.
The electrical switch should be turned “off” before the
front door to furnace is removed. After removing the
front door, remove the left side filter door in the upper
section of the furnace. Refer to Figure 14 for proper
filter locations.
Figure 13 shows a typical installation of a 20 x 25 x 1
filter rack. The same 14 x 23 cutout is required in the
furnace side, and the bottom of the filter rack is aligned
over the bottom of the 14 x 23 cutout. The top of the
filter rack rises approximately 6 inches above the top of
the cutout. The 3 inch depth of the filter rack provides
ample spacing between furnace side and leaving edge of
filter for the entire filter surface to be effective.
To remove filter from the filter rack (see Figures 12 &
13), remove the filter access cover and grasp the end of
the filter.
This filter is the high velocity type foam filter which
may be washed and used over and over. Do not replace
it with a fiberglass disposable filter of the same size.
To replace filter, reverse the above procedure.
FIGURE 14
FILTER LOCATIONS FOR COUNTERFLOW MODELS
MIS-1341
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