Maintenance - LG AR-DR12-05A Installation And Operation Manual

Combustion Blower Motor
Motor maintenance is generally limited to cleaning. Cleaning should be limited to exterior surfaces only. Removing dust and grease build-up
on the motor housing assures proper motor cooling. Use caution and do not allow water or solvents to enter the motor or bearings. Under
no circumstances should motors or bearings be sprayed with water, steam or solvents. The motor bearings are pre-lubricated and sealed,
requiring no further lubrication.
WARNING
Turn off all gas and electrical power to the unit before performing any maintenance or service operations to this unit. Remem-
ber that if the unit is equipped with electric heat, there may be a second high voltage source that must also be disconnected.
Burners and Orifices
Before each heating season, examine the burners and gas orifices to make sure they are clear of any debris such as spider webs, etc. Clean
burner as follows:
• Turn off both electrical and gas supplies to the unit.
• Disconnect the union between manifold and gas valve.
• Remove burner manifold and burner assembly.
• Inspect and clean orifices and burners as necessary. Avoid using any hard or sharp instruments which could cause damage to the orifices
or burners.
1. Remove any soot deposits from the burner with a wire brush.
2. Clean the ports with an aerosol degreaser or compressed air.
3. Wipe the inside of the burner clean. Cleaning the burner with a degreaser will slow the future buildup of dirt.
• Before reinstalling the burner assembly, look down the heat exchanger tubes to make sure they are clear of any debris.
• Reinstall manifold and burner assembly, reconnect wire leads and gas supply piping.
• Turn on the electrical power and gas supply.
• Follow the start-up procedure to light the burners and verify proper operation.
Heat Exchanger
The heat exchanger should be checked annually for cracks and discoloration of the tubes. If a crack is detected, the heat exchanger should
be replaced before the unit is put back into operation. If the tubes are dark gray, airflow across the heat exchanger should be checked to
make sure the blower is operating properly.
Flue Collector Box
The flue passageway and flue collector box should be inspected prior to each heating season and cleared of any debris.
Electrical Wiring
The electrical wiring should be inspected annually for loose connections or wiring deterioration.
Gas Train
The gas train connections, joints and valves should be checked annually for tightness.
Replacement Parts
When ordering replacement parts, include the complete unit model number and serial number as shown on the unit labels.
INDIRECT GAS FIRED FURNACES
Due to our policy of continuous product innovation, some specifications may change without notification.
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Maintenance

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