24 Electronic Theatre Controls, Inc.
Cleaning dimmer rack air filters
The air filter on your dimmer should be cleaned every six months, more often
if your system operates in a dusty environment. You can remove the air filter
for cleaning.
1. Open the dimmer rack door. The air filter is mounted on the inside of the
door, held in on the bottom by a metal lip.
2. Slide the filter up about 1/2 inch until the filter base clears the top edge of
the lip. Tilt the filter slightly so the base is out far enough to clear the
retaining lip and slide the filter down and out.
3. Vacuum or blow out the dust in an appropriate place. (Not next to the
dimmer rack.) You can wash the filter under clear tap water, but it must
be completely dry before you reinstall it. Do not use soap or other
chemicals to clean the filter.
4. Slide the top of the filter back up into the slot at the top of the door until
the base clears the metal retaining lip on the bottom of the door.
5. Let the filter drop back into place and close the door.
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chapter 3
system
maintenance
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