2. Push the CEN coupling together,
pull back the airline collar, disconnect the
airline and leave the hazard area.
4.9 CHANGING FROM
CYLINDER TO AIRLINE
1. Connect the airline to the pigtail
and close the cylinder valve.
2. Take a sharp breath to activate the
DV and then breathe normally.
DV Failure: Open the DV bypass if there
is a problem with the DV.
WARNING:
If the cylinder valve is not closed, the
cylinder will empty.
5. DOFFING THE
APPARATUS
WARNING:
DO NOT remove the apparatus until
well clear of the hazard area.
2. Release the head harness by
pulling the buckles forward in sequence:
bottom, middle, top. Remove the
facemask.
3. If you have been breathing from the
cylinder, close the cylinder valve.