Bryant 355CAV User Manual download pdf (Page 22)

or other accessories. All accessories MUST be connected external

to furnace main casing.

Return Air Connections

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.

WARNING

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

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.

WARNING

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.

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.

CAUTION

Table 2 – Filter Information -- In. (mm)

AIR FILTER LOCATED IN BLOWER COMPARTMENT

Furnace

Casing Width

Filter Size

Filter Type

Framed

Side

Return

Bottom

Return*

17--- 1/2

(445)

(1) 16 x 25 x 3/4 {

(406 x 635 x 19)

(1) 16 x 25 x 3/4{

(406 x 635 x 19)

Washable

(533)

(1) 16 x 25 x 3/4*

(406 x 635 x 19)

(1) 20 x 25 x 3/4{

(508 x 635 x 19)

Washable

24--- 1/2

(622)

(1 or 2)

16 x 25 x 3/4*

(406 x 635 x 19)

(1) 24 x 25 x 3/4{

(610 x 635 x 19)

Washable

* 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

FILTER

RETAINE

WASHABLE

FILTER

A93045

Fig. 24 -- Filter Installed for Side Inlet

355CAV

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Bryant 355CAV User Manual Page 22

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