AS-D+—AS-P Series Instruction Manual 45
AirSep Corporation
6.4 CHANGING FILTER ELEMENTS
The time period to change the lter element depends upon the feed air conditions.
If the feed air is highly contaminated with dust, oil, etc., the lter element must be
changed more frequently than the specied time interval in the manual.
The following procedure describes how to change the lter elements for either the
particulate lter semi-annually or the coalescing lter annually.
1. Shut down the oxygen generator and depressurize the filters. (See
Section 6.3, Depressurizing the Filters.)
Do not attempt to remove the lter bowls until the lter assembly
fully depressurizes as described in Section 6.3.
2. To remove the bowl from either filter, push down the bowl latch and
rotate the bowl slightly right or left while pulling down on the bowl. If the
filter has screws, loosen them up.
3. When the bowl is free, disconnect the drain tubing from the bottom of
the bowl. There may be a retainer nut which has to be disconnected to
remove the filter element for the filter models with screws.
4. Wash the bowl in warm, soapy water, and then rinse the bowl.
5. Gently unscrew the old filter element and discard it.
6. If you are replacing a coalescing filter element, remove and discard the
black gasket where the top of the filter element connects to the filter
housing.
7. If you are replacing a coalescing filter element, make sure a black
gasket is attached to the top of the new element.
8. Taking care not to touch the filter portion of the new filter element,
screw it into the position from which the old filter was removed.
9. Reconnect the drain tubing to the bottom of the bowl.
10. Re-install the filter bowl, making sure the bowl locks firmly into place.
11. Slowly open fully the manual inlet valve and manual filter outlet valve.
12. Turn on the feed air at the air compressor or air header.
13. Connect the oxygen generator to the power supply.
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