Charging Cylinders - MSA AirHawk II Mode D'emploi

1. Be sure there is no
pressure in the system
before replacing a
cylinder. Disconnect
the Audi-Larm Alarm
Assembly coupling nut.
2. Lift and turn the latch wing to loosen the cylinder
clamp.
3. Slide out the empty cylinder and install one that is fully
charged. Be sure that the adjustable cylinder band
and latch is in the proper slot before you insert a new
cylinder. Make sure that the lock tab on the carrier is
fully engaged in the appropriate cylinder band slot
position.
4. Slide the fully charged cylinder into the carrier, with
gauge facing out, turn the latch wing clockwise to
tighten fully. Fold over the latch wing toward
backplate, locking latch wing in place.
Note: Be sure to tighten the latch wing fully each time a
cylinder is installed.
5. To check that the cylinder is secure, place one hand
on the backplate and grasp the cylinder valve with the
other. Try to pull the cylinder and valve down and out
away from the carrier. Make sure that the band and
latch holds the cylinder securely in the carrier.
Note: If the cylinder feels loose, re-check that the band and
latch is in the proper slot; that the lock tab is fully engaged
in the slot; and that the latch wing is fully tightened and
flipped over with the label side OUT. Do not use the air
mask if the cylinder is not held securely in the carrier.
6. Check that the O-ring is inside the Audi-Larm Alarm
Assembly coupling nut. If the O-ring is damaged it
must be replaced before the alarm is used.
7. Thread the Audi-Larm
Alarm Assembly
coupling nut to the
cylinder valve and
hand-tighten (no tools).
REMOVING THE APPARATUS
11
CHANGING THE CYLINDER WITH BUCKLE AND
STRAP
Be careful not to drop cylinder or bump valve knob. An
unsecured cylinder can become an airborne projectile
under its own pressure if the valve is opened even
slightly. Failure to follow this warning can result in
serious personal injury or death.
1. Be sure there is no pressure in the system before
replacing a cylinder. Disconnect the alarm Assembly
coupling nut.
2. Lift over center buckle to loosen the cylinder strap.
3. Slide out the empty cylinder and install one that is fully
charged. Be sure that the adjustable cylinder buckle is
properly installed.
4. Slide the fully charged cylinder into the carrier, with
gauge facing out. Close the over center buckle to
tighten the cylinder strap.
5. To check that the cylinder is secure, place one hand
on the back plate and grasp the cylinder valve with
the other. Try to pull the cylinder and valve down and
out away from the carrier. Make sure that the strap
and buckle hold the cylinder securely in the carrier.
NOTE: If the cylinder feels loose, re-check that the strap
and buckle are properly adjusted. Open cylinder buckle.
Tighten cylinder strap by pulling on top (outer) strap. It will
be necessary to reposition the black plastic slide during
adjustment. Tighten cylinder strap until cylinder buckle is
approximately 45 degrees from vertical. Close the cylinder
buckle. Do not use the air mask if the cylinder is not held
securely in the carrier. DO NOT over-tighten the cylinder
strap; otherwise it will damage the center buckle
assembly.
6. Check that the O-ring is inside the Alarm Assembly
coupling nut. If the O-ring is damaged it must be
replaced before the alarm is used.
7. Thread the alarm Assembly coupling nut to the
cylinder valve and hand-tighten (no tools).

CHARGING CYLINDERS

Always check to be sure the hydrostatic test date is within
the prescribed period and that the cylinder is properly
labeled to indicate its gaseous service. New labels are
restricted items which are only available through certified
hydrostatic test facilities.
Inspect the cylinder body for cracks, dents, weakened
areas, corrosive agent, causing the fibers to break or peel,
or signs of heat-related damage. If the cylinder is
damaged, return it to an MSA Service Center. Call 1-800-
MSA-2222 for instructions.
TAL 1211 (L) Rev. 4 - 10088650