Changing Filter Elements - AirSep AS-20 Instruction Manual

12/02
5) Shut off the feed air supply at the air compressor or air header.
6) Re-install the front cover of the enclosure, if applicable.
7) Reconnect the oxygen generator to the power supply.
8) Press the MANUAL DRAIN button on the control panel until the CYCLE
PRESSURE gauge indicates zero pressure.
9) Set the ON/OFF switch on the control panel to OFF.
7.5
The following procedure describes how to change the filter elements for either the
particulate filter (not available on the AS-20 model) semi-annually or the coalescing
filter annually.
1) Depressurize the filter assembly and shut down the oxygen generator. (See
Section 7.4, Depressurizing the Filters.)
2) While the unit is depressurized and the power supply is disconnected,
remove the front cover of the enclosure. (See Section 7.3, Removing the Front
Cover of the Enclosure.)
3) To remove the bowl from either filter, push down the bowl latch and rotate the
bowl slight right or left while pulling down on the bowl.
4) When the bowl is free, disconnect the drain tubing from the bottom of the
bowl.
5) Wash the bowl in warm, soapy water, then rinse the bowl.
6) Gently unscrew the old filter element and discard it.
7) 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.
8) If you are replacing a coalescing filter element, make sure a black gasket is
attached to the top of the new element.
7-4
If the pressure gauge does not decrease to zero, shut down the
unit and call the AirSep Corporation Commercial Products
Division.

Changing Filter Elements

Do not attempt to remove the filter bowls until the filter
assembly fully depressurizes as described in Section 7.4.
®
AirSep Corporation
AS-20—1000 Instruction Manual