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10.2 Cleaning the Filters
To reduce the risk of injury, disconnect the air filtration system from the power source (unplug)
before servicing or changing filters. Failure to comply may cause serious injury!
This ISF is designed to remove airborne non-metallic dust particles from the air. Cleaning is about removing those particles
from the filter in the opposite direction from which it came.
It is recommended to clean both filters at the same time. Whether using the Filter Status Indicator or a visual inspection,
both filters should be cleaned to restore as much filtration ability as possible.
Remove the filters from the ISF unit as described in 10.1 Changing the Filters.
10.2.1 Washable Filters
Washable filters are those filters which may get wet and allowed to dry before returning to service. The replacement
Washable Electrostatic Outer Filter (P/N 708732) is a washable filter.
Figure 10-2 Inside of filter shown
•
Using a hose and spray nozzle with normal tap water pressure, spray the filter from the inside out. Opposite the
operating air flow. This will rinse the larger loose particles out of the filter.
•
Mix a mild detergent and water mixture (soap) such as dish soap. Mix a drop or two of dish soap and water into a spray
bottle. If using a commercial electrostatic detergent, follow the label instructions.
•
Spray the soap onto the entire filter until fully covered.
•
Allow the soap to soak 1 to 2 minutes on the filter but do not allow the soap to dry. This will create a sticky film that is
difficult to remove.
•
Thoroughly rinse the soap out of the filter and the filter frame.
•
Allow all excess water to drain off the filter. While the filter does not need to be absolutely dry, do not return to service
if water is dripping or droplets are still visible.
•
Low pressure compressed air may be used to remove any remaining water from the filter.
•
Install the filters in reverse of the removal. The outer filter has directional air flow arrows printed on the frame which
depicts the direction of air flow. Make sure it is facing the proper direction when installed. If no directional arrows are
present, the inboard side of the filter will typically have metal support not used on the outboard side.
