A system of belts and pulleys is employed to transmit power from the motor to rotate the evaporator drum. This series of pulleys decreases the motor RPM to a slower pace for the evaporator drum. The pulley system requires no maintenance.
If a belt or pulley needs replacement, follow these steps;
1. Unplug the humidifier from the power outlet.
2. Remove the pulley guard (Kidney shaped panel on back of unit)
3. The belt and pulley system now exposed consists of a main drive pulley on the rear motor shaft turning a large belt to three other pulleys (which are identical) which are turned by two small belts. A wire unites the top pulley to the drive roller shaft which rotates the evaporator drum (Fig W).
4. The tie wire can be straightened to allow it to be removed. After the wire tie is removed, all pulleys can be slid off their shafts to replace them or the belts.
5. Occasionally a belt will stretch and lose enough grip to not turn the evaporator drum. A stretched belt should be replaced. Never stretch a new belt when assembling on the humidifier.
6. With required parts replaced, re-install belts and pulleys according to Figure W. Notice the middle pulley is installed reverse of the other two pulleys.
7. Reverse steps 2 and 1 to re-assemble the humidifier.
David B. February 23rd, 2010
Posted In: Humidifiers
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