CAIRE HELiOS Marathon H850 Use Manual page 47

5. The portable oxygen unit does not fill.
6. The portable oxygen unit vent valve does not
WARNING
Do not touch liquid oxygen or parts that have been
in contact with liquid oxygen. Liquid oxygen is
extremely cold (-297 °F / -183 °C). When touched,
liquid oxygen, or parts of the equipment that have
been carrying liquid oxygen, can freeze skin and
body tissue.
HELiOS Marathon
side. With the cannula on, close your mouth and
breathe only through your nose to verify that the
portable oxygen unit has stopped pulsing.
a. Verify there is oxygen in the reservoir. If the
reservoir has a pounds-per-square-inch (psi)
pressure gauge, make sure it reads between
20 psi and 48 psi.
b. Ensure the portable oxygen unit and reservoir fill
connectors are fully engaged throughout the
filling process.
close properly at the end of the filling process.
If the vent valve fails to close and the hissing sound
and oxygen vapor cloud continue, carefully remove
the portable oxygen unit by pressing the release
button on the reservoir. Venting from the bottom of
the portable oxygen unit should stop in a few
minutes. Keep the portable oxygen unit upright,
allowing it to warm until you can close the vent
valve. The portable oxygen unit may require as much
as 60 minutes to restore adequate pressure for
accurate oxygen flow. While waiting for the portable
oxygen unit, use an alternate source of oxygen such
as an external flow control device, B-701655-00. See
Accessories, page 47.
TM
H850 Portable Oxygen Unit Home Use Guide
Troubleshooting
43