Bryant 355CAV Return Air Connections, Fire Hazard, Upflow Furnaces, Filter Arrangement

355CAV

humidifier, or other accessories. All accessories MUST be connected external to furnace main casing.

Return Air Connections

!WARNING

FIRE HAZARD

Failure to follow this warning could result in personal injury, death or property damage.

Never connect return-air ducts to the back of the furnace. Return air duct connections on furnace side(s) permitted in upflow applications only.

Upflow Furnaces

The return-air duct must be connected to bottom, sides (left or right), or a combination of bottom and side(s) of main furnace casing. Bypass humidifier may be attached into unused side return air portion of the furnace casing. DO NOT connect any portion of return-air duct to back of furnace casing.

Downflow and Horizontal Furnaces

The return-air duct must be connected to return-air opening provided. DO NOT cut into casing sides or back to attach any portion of return-air duct. Bypass humidifier connections should be made at ductwork or coil casing sides exterior to furnace.

Filter Arrangement

!WARNING

FIRE, CARBON MONOXIDE AND POISONING HAZARD

Failure to follow this warning could result in personal injury, death or property damage.

Never operate unit without a filter or with filter access door removed.

The air filter arrangement will vary due to application, furnace orientation and filter type. The filter may be installed in an external Filter/Media cabinet (if provided) or the furnace blower compartment. Factory supplied washable filters are shipped in the blower compartment.

If a factory-supplied external Filter/Media cabinet is provided, instructions for its application, assembly, and installation are packaged with the cabinet. The Filter/Media cabinet can be used with the factory-supplied washable filter or a factory-specified high-efficiency disposable filter (see cabinet instructions).

If installing the filter in the furnace 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.

!CAUTION

CUT HAZARD

Failure to follow this caution may result in personal injury.

Use care when cutting support rods in filters to protect against flying pieces and sharp rod ends. Wear safety glasses, gloves, and appropriate protective clothing.

!CAUTION

UNIT MAY NOT OPERATE

Failure to follow this caution may result in intermittent unit operation or performance satisfaction.

For airflow requirements above 1800 CFM, see Air Delivery table in Product Data literature for specific use of single side inlets. The use of both side inlets, a combination of one side and the bottom, or the bottom only will ensure adequate return air openings for airflow requirements above 1800 CFM.

Table 2 – Filter Information

AIR FILTER LOCATED IN BLOWER COMPARTMENT

Furnace	Filter Size (In./mm)		Filter Type
Casing Width
	Side	Bottom
			Framed
	Return	Return*
17---1/2 in.	(1) 16 x 25 x 1	(1) 16 x 25 x 1{	Cleanable
(445 mm.)	(in.){	406 x 635 x 25
	406 x 635 x 25	(mm)
	(mm)
21	(1) 16 x 25 x 1*	(1) 20 x 25 x 1{	Cleanable
	406 x 635 x 25	508 x 635 x 25
(533 mm.)
	(mm)	(mm)
	(1 or 2)	(1) 24 x 25 x 1{
24---1/2	16 x 25 x 1*		Cleanable
		610 x 635 x 25
(622 mm.)	406 x 635 x 25
		(mm)
	(mm)

*Filters may be field modified by cutting filter material and support rods (3) in filters. Alternate sizes can be ordered from your distributor or dealer

{Factory--- provided with the furnace

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