Personal Ambulatory Oxygen System Provider Technical Manual
45
PN 20631679 Rev D
2. Unscrew the wing nut that holds the HEPA lter.
Figure 20: Wing Nut.
3. Unscrew the Clear HEPA lter and discard lter & small o-ring.
Figure 21: Unscrewing the HEPA Filter.
4. Install the new small o-ring and HEPA lter.
Figure 22: Installing the new HEPA Filter.
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