Addition Of Air Conditioning

Optional Duct Standoff

20 x 25 Optional

Filter Rack

25-23-05-4

Filter

Optional Filter Rack Installation: Side Return

Center the filter rack on the side panel, flush with the bottom edge of the furnace. Mark the fastening holes. Drill the fastening holes in the side panel and fasten the filter rack in place with sheet metal screws. See Figure 23 and Figure 24.

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Side Return Filter Rack

Filter

25-23-05-4a

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i_Filters Installed on Two Sides

Using Two

Filter Racks

25-23-05-3

Filter

Internal Filter in Bottom- Return Installation

When installing a bottom-mounted filter inside the furnace, install the filter clips on the edge of the bottom duct opening with the wider end of the clips toward the blower, as shown in Figure 25. Clips

may be obtained from your distributor or fabricated from sheet metal (Figure 26). Insert filter into side clips first and push filter back until it is fully engaged into back clip.

Bottom Mounted Filter

Center Clip

sideto

25-24-18-1

11/4"

26 Ga, Galvanized Steel

NOTE: If filters are only suitable for heating application, advise homeowner that filter size may need to be increased if air condi- tioning is added.

When a refrigeration coil is used in conjunction with this furnace, it must be installed on the discharge side of the furnace to avoid con-

densation in the heat exchanger. The coil installation instructions must be consulted for proper coil location and installation proce-

dures. With a parallel flow arrangement, dampers must be installed to prevent chilled air from entering the furnace. Ifmanual- ly 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.

Copper or plastic tubing may be used for the condensate drain line.

441O1 261302

8MPN125J20B1, N8MPL050B12B1, N8MPL100F20B1, 8MPN050B12B1, 8MPL075F16B1 specifications

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