Mounted Filter Rack
I \
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25-20-90
Filter Installation using Optional Filter Rack
When installing or removing a bottom mounted filter, slide the two
side filter clips to the back of the furnace BEFORE installing or re-
moving. This will allow the filter to clear the front raised edge of the
furnace. Insert filter into side clips first and push filter back until it is
fully engaged into back clip. When filter is in place, slide clips back
into place midway on filter as shown in Figure 44 and Figure 45.
Standoff Filter Rack
Bottom Mounted Filter Rack
25-24-18
Slide filter clips towards back before removing
UsingOptional
Standoff Filter
Rack
25-21-45a
CAUTION
26 Ga. Galvanized Steel
11/4"
<
11/16"
Refer to Figure 46 and for guidelines to install filters. Furnaces
which require larger filter media and have limited clearances on
one side of furnace, require a standoff filter rack, see Figure 46,
available from your distributor.
Fabricate a plenum to the dimensions given in Table 12, for the
furnace outlet. Plenum should be flanged, approximately 3/4" for
support.
Note: The three(3) screws in the top panel of the furnace next to
the duct flange MUST be removed to provide serviceability of the
primary heat exchangers in the downflow installation
1. Position plenum through the floor and set the furnace over
the opening in the floor. If necessary, grout around the base
to seal air leaks between the base and the floor.
Combustible Floor Installation
FIRE HAZARD
Failure to install unit on noncombustible subbase
could result in death, personal injury and/or
property damage.
Place furnace on noncombustible subbase on
downflow applications, unless installing on non-
combustible floorinq.
44001 102102
Downflow Furnace Installation
Non- Combustible Floor Installation
When a refrigeration coil is used in conjunction with this unit, it
must be installed parallel with or on the discharge side of the unit to
avoid condensation on the heat exchanger. The coil installation in-
structions must be consulted for proper coil location and installa-
tion procedures. With a parallel flow arrangement, dampers must
be installed to prevent chilled air from entering the furnace. If
manually operated dampers are used, they must be equipped with
a means to prevent operation of either unit unless the damper is in
full heat or full cool position.
A 3" clearance is required on the right side ofthe furnace in order to
run the condensate drain line. Copper, iron or plastic tu bing may be
used for the condensate drain line.
Addition Of Air Conditioning
If filters are only suitable for heating application, advise
homeowner that filter size may need to be increased if air
conditioning is added.
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