LG AR-DR12-05A Installation And Operation Manual page 51

OPTIONAL ENERGY WHEEL
Maintenance
Figure 24: Energy Wheel Cassette
WARNING
When performing maintenance inspections always disconnect the power source.
Inspection
The wheel should be inspected semiannually in accordance with the maintenance schedule. Main-
tenance of the wheel consists mainly of inspecting the wheel for cleanliness and then checking
the drive motor, belt, and pulley for wear. If the wheel layers appear dirty, the wheel should be
disassembled and cleaned.
The wheel rotates through the two airstreams which are moving in opposite directions, the wheel
is self- cleaning, up to a point. If the wheel media becomes blocked by dirt or dust, or if the media
collects a layer of smoke residue or an oily film, the energy transfer efficiency drops.
The main factor in the frequency of cleaning is the cleanliness of the air. If air filters are not
changed frequently, the wheel will collect contaminants and will then have to be cleaned.
Wheel Disassembly
Wheels are part of a cassette that may be pulled from the unit for easy access. There may be a
small damper assembly or other component that blocks removal of the cassette. Before sliding out
the cassette or any other component, disconnect any power supply cord and secure it so it cannot
jam or otherwise get damaged. Each wheel has removable segments that hold the coated layers
of media and each segment is held in place with two retaining clips located on the outer rim of the
wheel. When removing more than one segment, remove them in sequence from opposite sides of the wheel (180 degrees apart) to reduce
the imbalance. Secure the wheel against rotation. Carefully release the two retaining clips and swing them fully open. The segment can now
be removed by pushing the face of the segment close to the outer rim of the wheel. Wheel segments are built to close tolerances and the
segment may have to be jiggled to remove it. Do not use a hammer or otherwise force the
Figure 25: Segment Retaining Clip
segment because these are high value items and are not built to withstand abuse.
Whenever retaining clips are opened, they should be closed as soon as possible. If the wheel
should rotate when a clip is open, the clip will jam against the bearing support bar and could
cause damage.
Cleaning
Maintenance or cleaning of the wheel segments should be done with the segments removed from the wheel cassette to avoid splashing liq-
uids or cleaning agents inside the cabinet. If the energy wheel appears excessively dirty, it should be cleaned to ensure maximum operating
efficiency. Only excessive buildup of foreign materials needs to be removed.
DISCOLORATION AND STAINING OF ENERGY RECOVERY WHEEL DOES NOT AFFECT ITS PERFORMANCE.
Thoroughly spray the wheel matrix with a household cleaner such as Fantastik™ or the equivalent. Gently rinse with warm water and use
a soft brush to remove any heavy accumulations. A detergent/water solution can also be used. Avoid aggressive organic solvents, such as
acetone. Wheel segments can be soaked in the above solution overnight for removal of stubborn dirt or accumulations.
After cleaning is complete, shake excess water from the wheel or segments. Dry the wheel or segments before putting them back into the
cassette.
Figure 26: Wheel Segment Pulley Side Figure 27: Wheel Segment Motor Side
Reassembly
When reinstalling the segments, be sure to install
them with the correct face toward the motor side of the
cassette. Note that one face of each segment is smooth
and the other face has a reinforcing channel or support
cut into the surface.
Energy Recovery Wheel Belt
Inspect belts each time filters are replaced. Belts that
Due to our policy of continuous product innovation, some specifications may change without notification.
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