CAIRE HELiOS Marathon H850 Home Use Manual page 26

How To Use Your H850 Personal Oxygen System
AUTION
C : If the vent valve fails to close and the
hissing continues, remove the H850 Portable by
depressing the H850 Portable release button on the
Reservoir. Ensure that the Portable is kept upright
and is not tipped at all during this time. The H850
Portable will stop venting in a few minutes. Allow the
H850 Portable to warm until you can close the vent
valve. The H850 Portable may require as much as 60
minutes to restore adequate pressure for accurate
oxygen flow. An alternate source of oxygen, such as a
flow control valve attached to the Reservoir, can be
used if needed.
Note: For shorter planned use times, you can partially fill
the H850 Portable by closing the vent valve sooner
than normal. The H850 Portable will then be lighter
to carry.
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