LG AR-DR11-08A Installation And Operation Manual page 47

ENERGY RECOVERY WHEEL (AR-DE MODELS ONLY)
Wheel Drive Components
Wheel Drive Motor Bearings
The wheel drive motor bearings are pre-lubricated, so no further lubrication is necessary. Make certain air cooling ports are not blocked. The
wheel drive pulley is secured to the drive motor shaft by a set screw. The set screw is secured with a removable adhesive to prevent loosen-
ing. Confirm annually that the set screw is secure.
Wheel Drive Belt
The wheel drive belt is a urethane stretch belt designed to provide constant tension through the life of the belt. No adjustment is required.
Inspect the drive belt annually for proper tracking and tension. A properly tensioned belt will turn the wheel immediately after power is applied
with no visible slippage during start-up.
Diameter Seals
Diameter seals are provided on each cassette to minimize transfer
of air between counter-flowing air streams. To adjust the diameter
seals:
1. Loosen the diameter seal adjusting screws and back seals away
from wheel surface. Larger wheels may have a center seal.
2. Rotate wheel clockwise until the two (2) opposite spokes are
hidden behind the bearing support beam. Using a folder piece
of paper as a feeler gauge, position paper between the wheel
surface and diameter seals.
3. Adjust the seal towards the wheel surface until a slight friction on
the feeler gauge (paper) is detected when the gauge is moved
along the length of the spoke.
Wheel Drive Motor and Pulley Replacement
1. Disconnect power to the wheel drive motor.
2. Remove the belt from the pulley, and position temporarily around
the wheel rim.
3. Loosen the set screw in the wheel drive pulley using an Allen
wrench, and then remove the pulley from the motor drive shaft.
4. While supporting the weight of drive motor in one hand, loosen
and remove the four (4) mounting nuts.
5. Install the replacement motor.
6. Install the pulley and secure the set screw to the flat surface of
the drive shaft.
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
Figure 62: Adjusting the Diameter Seals (Step 1).
Figure 63: Wheel Drive Motor Mounting.
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