Bryant Understanding Furnace Air Flow Direction and Maintenance Guidelines

WARNING: Turn off the gas and electrical supplies to the unit before performing any maintenance or service. Follow the operating instructions on the label attached to the furnace. A failure to follow this warning could result in personal injury.

WARNING: Never store anything on, near, or in contact with the furnace, such as:

1.Spray or aerosol cans, rags, brooms, dust mops, vacuum cleaners, or other cleaning tools.

2.Soap powders, bleaches, waxes or other cleaning compounds, plastic or plastic containers, gasoline, kero- sene, cigarette lighter fluid, dry cleaning fluids, or other volatile fluids.

3.Paint thinners and other painting compounds, paper bags or other paper products.

A failure to follow this warning could result in corrosion of the heat exchanger, fire, personal injury, or death.

The minimum maintenance that should be performed on this equipment is as follows:

1.Check and clean air filter each month or more frequently if required. Replace if torn.

2.Check blower motor and wheel for cleanliness and lubrica- tion each heating and cooling season. Clean and lubricate as necessary.

3.Check electrical connections for tightness and controls for proper operation each heating season. Service as necessary.

CAUTION: As with any mechanical equipment, per- sonal injury can result from sharp metal edges, etc., therefore, be careful when removing parts.

A. Air Filter Arrangement

The air filter arrangement may vary depending on the application. Refer to Table 1 or 2 for filter size information.

TABLE 1ÐFILTER SIZE INFORMATION FOR DOWN-

FLOW FURNACE (IN.)

FURNACE	FILTER QUANTITY	FILTER
CASING WIDTH	AND SIZE	TYPE
14-3/16	(2) 16 X 20 X 1	Cleanable
17-1/2	(2) 16 X 20 X 1	Cleanable
21	(2) 16 X 20 X 1	Cleanable
24-1/2	(2) 16 X 20 X 1	Cleanable

TABLE 2ÐFILTER SIZE INFORMATION FOR UPFLOW

FURNACE (IN.)

FURNACE	FILTER QUANTITY AND SIZE		FILTER
CASING WIDTH	Side Return	Bottom Return	TYPE
14-3/16	(1) 16 X 25 X 1*	(1) 14 X 25 X 1	Cleanable
17-1/2	(1) 16 X 25 X 1*	(1) 16 X 25 X 1	Cleanable
21	(1) 16 X 25 X 1	(1) 20 X 25 X 1*	Cleanable
24-1/2	(2) 16 X 25 X 1*	(1) 24 X 25 X 1	Cleanable

*Factory provided with the furnace. Filters may be field modified by cutting as required.

Ð2Ð

WARNING: Never operate unit without a filter or with filter access door removed. A failure to follow this warning could result in fire, personal injury, or death.

1.Downflow

Each furnace requires 2 filters which are installed in the return-air duct. (See Fig. 3.)

AIRFLOW

INSTALLATION

POSITION

OF FILTERS

RETURN-AIR

PLENUM

ACCESS DOOR

A88486

Fig. 3ÐFilter Positions

To remove filters for cleaning or replacement, proceed as follows:

a. Disconnect electrical power before removing access door.

b.Remove blower access door after removing 2 screws.

c.Reach up behind top plate, tilt filters toward center of return-air plenum, remove filters, and clean as needed. Replace if torn.

d.Furnaces are equipped with permanent, washable filters. Clean filters with tap water. Spray water through filter in opposite direction of airflow.

e.Rinse and let dry. Oiling or coating of filters is not recommended or required.

f.Reinstall filters.

g.Replace access door and secure with 2 screws.

h.Restore electrical power to furnace.

2.Upflow

Each furnace requires 1 or 2 filters which are installed in the blower compartment. (See Fig. 4.)

To remove filters for cleaning or replacement, proceed as follows:

a.Disconnect electrical power before removing access doors.