LG AR-DE12-05A, Installation And Operation Manual

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Maintenance
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. Remember 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.
a. Remove any soot deposits from the burner with a
wire brush.
b. Clean the ports with an aerosol degreaser or
compressed air.
c. 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.