Facepiece Fit Check - MSA FireHawk M7XT Fonctionnement/Entretien

5. Tighten the two side
temple straps in the
same manner as
described in step 4.
Ensure that the facepiece
tabs are not tucked
under the face seal.
6. Ensure the back of the
harness is centered on
the back of the head and
that the facepiece seal
provides uniform pres-
sure on the face at all
points. Readjust the
straps if needed.

FACEPIECE FIT CHECK

NOTE: Check the inhalation valve by inhaling. If the facepiece
does not provide sufficient flow of air, do not use facepiece.
The facepiece must be repaired or replaced.
1. Check facepiece fit,
a. Hold the palm of the
hand over the face-
piece inlet adapter.
b. Take a deep breath
and hold it for at least
10 seconds. The face-
piece should collapse
and stay collapsed
against the face. If it
does not, readjust the
facepiece and test
again. If this does not correct the leak, do not use the
facepiece.
2. Test the exhalation valve.
a. Take a deep breath and hold it.
b. Block the facepiece inlet adapter with the palm of the
hand and exhale. If the exhalation valve is stuck, a heavy
rush of air around the facepiece may be noticed. A
sharp exhalation of air may be needed to open the
valve. If this does not release the valve, do not use the
facepiece.
DONNING
This device may not seal properly to the face if a beard,
gross sideburns or similar physical characteristics (see NFPA-
1500 and ANSI Z88.2) exist. An improper facial seal may
allow contaminants to leak into the facepiece, reducing or
eliminating respiratory protection. Do not use this device if
such conditions exist. The face-to-facepiece seal must be
tested before each use. Never remove the facepiece except
in a safe, non hazardous non-toxic atmosphere. Misuse can
result in serious injury or death.
3. Open the cylinder valve
fully. Push in on the side
buttons of the Firehawk
Regulator to stop air
flow.
4. Listen for any hissing or popping sounds from the Audi-
Larm Alarm. If heard, return the air mask to an MSA trained
or certified repairperson.
INSTALLING THE SLIDE-TO-CONNECT FIREHAWK
REGULATOR ON THE FACEPIECE
NOTE: The slide-to-connect regulator has a side button with a
two pronged fork protruding from it. If this "fork" is not present
refer to the Installing the Push-To-Connect Firehawk
Regulator section of this manual.
1. Grasp and orient the reg-
ulator so that red bypass
knob is pointing to the
right and slide button is
on top.
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WARNING
MSA 314 (L) Rev. 2 - 10128861