User manual

28
7. Mount the xing cover to secure the position of
the breathing valve and tighten the screws by
hand. Do not overly tighten the screws as this may
pull out the thread insert thereby damaging the
mask.
M
ake sure that the O-ring is in place and undam-
aged.
8
. Check that the locknut on the breathing valve is
properly tightened.
9
. Check that the locking ring on the breathing valve
is properly tightened.
1
0. Connect the full-face mask with the mounted
breathing valve to the breathing hose. Securely
hand-tighten the breathing hose nut. Close the
safety pressure knob if that type of full-face mask
is used.