Personal Ambulatory Oxygen System
Provider Technical Manual
44
REMOVE AND REPLACE HEPA FILTER
(Internal and External Filters)
Replace the HEPA filter annually, or more often as needed. To replace the HEPA filter, follow these steps.
External Filters (E1, E2, E2 Plus, and Early E3s)
1. Cut the three cable ties on the silicone tubes attached to the HEPA filter.
Figure 19: Removing the HEPA Filter.
2. Disconnect both tubes from the filter hose barbs.
Figure 20: Disconnecting the HEPA Filter.
3. Remove and replace the filter.
NOTE:
Always cut the heads of cable ties to avoid damaging the tubing.
DO NOT use any petroleum based or other lubricants. A spontaneous
and violent ignition may occur if oil, grease or other petroleum
substances come into contact with oxygen under pressure. Keep
these substances away from the oxygen system, tubing and
connections and any other oxygen source.
WARNING:
