Bryant 330JAV, 331JAV instruction manual Downflow Filter Arrangement, II. Blower Motor and Wheel

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AIRFLOW

INSTALLATION

POSITION

OF FILTERS

RETURN-AIR

PLENUM

ACCESS DOOR

MOUNTING

SCREWS

RELIEF

BOX

GAS VALVE

CONTROL

W Y R G

WASHABLE

FILTER OR

DISPOSIBLE

MEDIA FILTER

IN FILTER

CABINET

FLUE

COLLAR

BLOCKED

VENT

SAFEGUARD

PRESSURE

SWITCH

FLUE

COLLECTOR

BOX

FILTER

RETAINER

WASHABLE

FILTER

FURNACE

A00293

A88486

Fig. 4—Downflow Filter Arrangement

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

g.Reinstall filters.

h.Replace blower access door and turn on electrical supply to furnace.

2.Upflow/Horizontal–filters installed in media cabinet adja- cent to furnace (See Fig. 5.)

a.Turn off electrical supply to furnace

b.Remove filter cabinet door.

c.Slide filter out of cabinet.

d.If equipped with permanent, washable filter, clean filter by spraying cold tap water through filter in opposite direction of airflow. Rinse filter and let dry. Oiling or coating of the filter is not recommended.

e.If equipped with factory-specified disposable media filter, replace only with media filter having the same part number and size.

f.Slide filter into cabinet.

g.Replace filter cabinet door.

h.Turn on electrical supply to furnace.

3.Upflow/Horizontal–filter(s) installed in side(s) and/or bot- tom of blower compartment (See Fig. 5.)

a.Turn off electrical supply before removing blower and control access doors.

b.Release filter retainer from clip at front of furnace casing. (See Fig. 5.) For side return, clips may be used on either or both sides of the furnace.

c.Slide filter out.

d.Clean filters by spraying tap water through filter from opposite direction of airflow.

—3—

Fig. 5—Model 330JAV Upflow

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

f.Place filter in furnace.

g.Replace blower and control access doors and turn on electrical supply to furnace.

II. BLOWER MOTOR AND WHEEL

The following items should be performed by a qualified service technician:

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

The inducer and blower motors are pre-lubricated and require no additional lubrication. These motors can be identified by the absence of oil ports on each end of the motor.

Clean blower motor and wheel as follows:

1.Turn off electrical supply to furnace.

2.Remove blower access door.

3.Downflow only:

a.Disconnect vent connector from furnace flue collar. (See Fig. 6.)

b.Remove internal vent pipe enclosure cover.

c.Disconnect and remove short piece of vent pipe from within furnace.

d.Disconnect and remove vent pipe enclosure. Push bot- tom side backward to release tabs.

NOTE: Vent pipe is SCREWED and RTV sealed to relief box.

4.Disconnect blower leads from furnace control. Note wire color and location for reassembly. Also, disconnect auxil- iary limit switch leads (downflow only, if present).

All other factory wires can be left connected, but field thermostat connections may need to be disconnected de- pending on their length and routing.

5.Remove 2 screws securing control and transformer support to furnace.

6.Hang control and transformer support to front of furnace casing.

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Contents Safety Considerations Table of ContentsIntroduction Electrostatic Discharge ESD Precautions ProcedureCare and Maintenance Cleaning AND/OR Replacing AIR FilterII. Blower Motor and Wheel Downflow Filter ArrangementSpeed Selector III. Cleaning Heat ExchangerPosition of Ignitor to Burner IV. Electrical Controls and Wiring Troubleshooting Wiring Diagrams324459-101 REV. D Service Start Service Training
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330JAV, 331JAV specifications

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