Manual Operation

The position of the damper vane can always be determined by looking at the indicator wheel. If the word “open” is visible, the vane is open. If the word “closed” is visible, the vane is closed.

Observe the following instructions in the event it is neces- sary to change the damper vanes from closed to open position. For example, if the cooling system is not zoned but does use the same duct work as the heating system, the damper vanes should be changed from the closed position to the open position at the start of the cooling season.

!CAUTION

Be sure to change the vanes back to the open position at the start of the heating season.

OPERATION

To change damper vane from closed to open position:

Loosen wing nuts and pull damper motor back from duct a short distance. Rotate indicator wheel 90° in either direction so that yoke on damper motor drops into the two round holes on indicator wheel. Then retighten wing nuts.

To change damper vane from open to closed position:

Loosen wing nuts and pull damper motor back from duct a short distance. Rotate indicator wheel 90° in either direction so that yoke on damper motor drops into the two square holes on indicator wheel. Then retighten wing nuts.