Bryant Heating and Cooling System 311A Efficiency Gas Furnace Yearly Maintenance

WARNING: FIRE OR EXPLOSION HAZARD Failure to follow this warning could result in corrosion of the heat exchanger, fire, personal injury, or death. 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, kerosene, cigarette lighter fluid, dry cleaning fluids, or

WARNING: ELECTRICAL SHOCK AND FIRE HAZARD Failure to follow this warning could result in personal injury, death or product damage. Turn off the gas and electrical supplies to the unit before performing any maintenance or service. Follow the operating inst

WARNING: CARBON MONOXIDE POISONING AND FIRE HAZARD Failure to follow this warning could result in fire, personal injury, or death. Never operate unit without a filter or with filter access door removed.

Table 13—Filter Size Information (IN.)

CAUTION: CUT HAZARD Failure to follow this caution may result in personal injury. Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing, safety glasses and gloves when handling parts and servicing furnaces.

The minimum maintenance on this furnace is as follows:

CLEANING AND/OR REPLACING AIR FILTER

NOTE: If the filter has an airflow direction arrow, the arrow must point towards the blower

CAUTION: CUT HAZARD Failure to follow this caution may result in personal injury. Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing, safety glasses and gloves when handling parts and servicing furnaces.

Media cabinet filter procedures :

NOTE: Media cabinet is included with single-stage deluxe 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

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 The inducer and blower motors are pre-lubricated and require no additional lubrication. These motors can be identified by the absence of oil po

Clean blower motor and wheel as follows:

For downflow or horizontal furnaces having vent pipes within the furnace that pass in front of the blower access door:

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

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

CAUTION: UNIT DAMAGE HAZARD Failure to follow this caution may result in shortened heat exchanger life. Heating fan speed(s) MUST be adjusted to provide proper air temperature rise as specified on the rating plate. Recommended operation is at the midpoint

NOTE: Refer to Table 9 for motor speed lead relocation if leads were not identified before disconnection.

To check blower for proper rotation:

WARNING: ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in electrical shock, personal injury, or death. Blower access door switch opens 115-v power to furnace control. No component operation can occur unless switch is closed. Exercise

NOTE: If thermostat terminals are jumpered at the time blower access door switch is closed, blower will run for 90 sec before beginning a heating or cooling cycle.

Downflow or horizontal furnaces with vent pipe through furnace only:

CLEANING HEAT EXCHANGER

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

NOTE: If the heat exchangers get a heavy accumulation of soot and carbon, they should be replaced rather than trying to clean them thoroughly. A heavy build-up of soot and carbon indicates that a problem exists which needs to be corrected, such as imprope

If it becomes necessary to clean the heat exchangers because of dust or corrosion, proceed as follows:

Disconnect wires to the following components. Mark wires to aid in reconnection of (be careful when disconnecting wires from switches because damage may occur):

NOTE: Be very careful when removing burner assembly to avoid breaking igniter. See Fig. 57 and 58 for correct igniter location.