Bryant 312AAV/JAV Filter Size Information In. / Mm, Cleaning AND/OR Replacing AIR Filter

Table 17 – Filter Size Information (In. / Mm)

		FILTER SIZE
FURNACE CASING WIDTH	SIDE		BOTTOM	FILTER TYPE
	RETURN		RETURN
14---1/2 (368)	16 x25 x 3/4		14 x25 x 3/4	Washable*
	(406 x635 x 19)		(356 x635 x 19)
17---1/2 (445)	16 x25 x 3/4		16 x25 x 3/4	Washable*
	(406 x635 x 19)		(406 x635 x 19)
21 (533)	16 x25 x 3/4		20 x25 x 3/4	Washable*
	(406 x635 x 19)		(508 x635 x 19)
24 (610)	16 x25 x 3/4		24 x25 x 3/4	Washable*
	(406 x635 x 19)		(610 x635 x 19)

*Recommended

**Some furnaces may have 2 filters.

CLEANING AND/OR REPLACING AIR FILTER		The inducer and blower motors are pre-lubricated and require no
The air filter arrangement will vary depending on the application.		additional lubrication. These motors can be identified by the
		absence of oil ports on each end of the motor.
NOTE: If the filter has an airflow direction arrow, the arrow
		Clean blower motor and wheel as follows:
must point towards the blower.
		1. Turn off electrical supply to furnace.
!	CAUTION
		2. Remove outer door.
		3. For downflow or horizontal furnaces having vent pipes
CUT HAZARD		within the furnace that pass in front of the blower access
		door:
Failure to follow this caution may result in personal injury.
		a. Disconnect vent connector from furnace vent elbow.
Sheet metal parts may have sharp edges or burrs. Use care
		b. Disconnect and remove short piece of vent pipe from
and wear appropriate protective clothing, safety glasses and
		within furnace.
gloves when handling parts and servicing furnaces.
		4. Remove 2 screws from blower access door and remove
		blower access door.

312AAV

Accessory media cabinet filter procedures:

1.Turn off electrical supply to furnace before removing filter access door.

2.Remove filter cabinet door.

3.Slide filter out of cabinet.

4.If equipped with permanent, washable 3/4-in. (19 mm) fil- ter, clean filter by spraying cold tap water through filter in opposite direction of airflow. Rinse filter and let dry. Oil- ing or coating of the filter is not recommended. See Table 17 for size information.

5.If equipped with factory-specified disposable media filter, replace only with media filter having the same part num- ber and size. For expandable replacement media, refer to the instructions included with the replacement media.

6.Slide filter into cabinet.

7.Replace filter cabinet door.

8.Turn on electrical supply to furnace.

BLOWER MOTOR AND WHEEL

!WARNING

ELECTRICAL SHOCK HAZARD

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

Blower access door switch opens 115-v power to control. No component operation can occur unless switch is closed. Caution must be taken when manually closing this switch for service purposes.

NOTE: The blower wheel should not be dropped or bent as balance will be affected.

The following steps should be performed by a qualified service agency.

To ensure long life and high efficiency, clean accumulated dirt and grease from blower wheel and motor annually.

5.All factory wires can be left connected, but field thermo- stat connections may need to be disconnected depending on their length and routing.

6.Remove 2 screws holding blower assembly to blower deck and slide blower assembly out of furnace.

7.Clean blower wheel and motor using a vacuum with soft brush attachment. Blower wheel blades may be cleaned with a small paint or flux brush. Do not remove or disturb balance weights (clips) on blower wheel blades.

8.Vacuum any loose dust from blower housing, wheel and motor.

9.If a greasy residue is present on blower wheel, remove wheel from the blower housing and wash it with an appro- priate degreaser. To remove wheel:

NOTE: Before disassembly, mark blower mounting arms, motor, and blower housing so motor and each arm is positioned at the same location during reassembly.

a.Disconnect capacitor wires (if equipped) and ground wire attached to blower housing.

b.Remove screws securing cutoff plate and remove cutoff plate from housing.

c.Loosen set screw holding blower wheel on motor shaft (160+/-20 in.-lb. when reassembling).

d.Remove bolts holding motor to blower housing and slide motor out of wheel (40+/-10 in.-lb. when reassembling).

e.Remove blower wheel from housing.

f.Clean wheel and housing.

10.Reassemble motor and blower by reversing steps 9a, through 9e. Be sure to reattach ground wire to the blower housing.

11.Verify that blower wheel is centered in blower housing and set screw contacts the flat portion of the motor shaft. Loosen set screw on blower wheel and reposition if neces- sary.

12.Spin the blower wheel by hand to verify that the wheel does not rub on the housing.

13.Reinstall blower assembly in furnace.

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