BioPak 240R-NIOSH User Instruction Manual
47C090, Revision C
Page 19 of 25
check valve will result in the facemask
being pushed away from the face.
DO NOT
place the apparatus into service if
the check valves do not pass the tests of
steps 3 and 4.
5. Depress the red emergency bypass for
1-2 seconds and release. Verify the
sound of oxygen gas additions into the
breathing chamber while the button is
depressed and that the oxygen
additions cease when the button is
released.
DO NOT
place the apparatus into service if
the emergency bypass valve does not pass
the above test.
