Bryant 355M-40-4, 355M-40-5 IV. Filter Arrangement, Ðfilter Information, Bottom Closure Panel

IV. FILTER ARRANGEMENT

CAUTION: Never operate unit without a filter or with blower access panel removed.

Factory-supplied washable framed filters are shipped in blower compartment. Determine location for filter and relocate filter retaining wire if necessary. See Table 2 to determine correct filter size for desired filter location. Table 2 indicates filter size, location, and quantity shipped with this furnace. See Fig. 2 for location and size of bottom and side return-air openings.

TABLE 2ÐFILTER INFORMATION

FURNACE	FILTER SIZE (IN.)*			FILTER TYPE
CASING
	Side Return	Bottom Return		FRAMED
WIDTH (IN.)
17-1/2	(1) 16 X 25 X 1²	(1) 16 X 25	X 1	Cleanable
21	(1) 16 X 25 X 1	(1) 20 X 25	X 1²	Cleanable
24-1/2	(2) 16 X 25 X 1²	(1) 24 X 25	X 1	Cleanable

*Filters can be field modified by cutting frame as marked and folding to desired size. Alternate sizes can be ordered from your distributor or dealer.

² Factory-provided with furnace.

CAUTION: Air delivery above 1800 CFM requires that both sides, a combination of 1 side and bottom, or bottom only of furnace be used for return air.

NOTE: Side return-air openings can ONLY be used in UPFLOW configurations. Install filter(s) as shown in Fig. 18.

For bottom return-air applications, filter may need to be cut to fit some furnace widths. Install filter as shown in Fig. 19.

171⁄2-IN. WIDE CASINGS ONLY:

INSTALL FIELD-SUPPLIED FILTER FILLER STRIP UNDER FILTER.

3″

24 1/2″

1″

241⁄2-IN. WIDE CASINGS ONLY: CUT AND FOLD FACTORY-PROVIDED FILTERS AS SHOWN TO DESIRED SIZE.

NOTE: Remove and discard bottom closure panel when bottom inlet is used.

V.BOTTOM CLOSURE PANEL

These furnaces are shipped with bottom closure panel installed in bottom return-air opening. This panel MUST be in place when side return air is used.

To remove bottom closure panel, perform following:

1.Tilt or raise furnace and remove 2 screws holding front filler panel. (See Fig. 20.)

2.Rotate front filler panel downward to release holding tabs.

3.Remove bottom closure panel.

4.Reinstall front filler panel and screws.

WASHABLE

FILTER

FILTER

RETAINER

A93045

Fig. 18ÐFilter Installed for Side Inlet

Ð16Ð

WASHABLE

FILTER

FILTER

FILTER RETAINER

SUPPORT

A96030

→Fig. 19ÐBottom Filter Arrangement

BOTTOM

CLOSURE

PANEL

FRONT FILLER

PANEL

A93047

Fig. 20ÐRemoving Bottom Closure Panel