Personal Ambulatory Oxygen System
Provider Technical Manual
45
4. Reconnect silicone tubes to the filter. Verify flow direction is correct. Ensure that the feed tubes are not blocked,
crimped or kinked upon completion of the installation or the unit will alarm for no/low oxygen flow after the
warm-up cycle is complete. Route tubing as shown in Figure 22 below. Place HEPA filter into slot in case.
Figure 21: Installing the HEPA Filter.
5. Re-install cable ties on silicone tubes.
NOTE:
Route tubing as shown in Figure 22. Install cable ties loosely as shown.
CAUTION
Once the silicone tubes are disconnected from the HEPA filter the
oxygen circuit is exposed to the atmosphere. Replace and reconnect
the filter immediately in order to minimize exposure to debris and
humidity which may result in ATF Module damage.
Internal Filters (Newer E3s)
HEPA Filter replacement SN: 11F06100456 and above:
1. Cut cable tie and Disconnect the tubing at the top of the filter carriage.
Figure 22: Tubing on Filter Carriage.
