Urc Assembly - MSA FireHawk M7XT Fonctionnement/Entretien

c. Push the female fitting of the hose onto the male fitting
of the URC Assembly until it snaps in place. Pull on the
hose to be sure the connection is secure. Filling immedi-
ately begins when the female fitting fully engages with
the URC Assembly.
d. After approximately 45-60 seconds, the pressure
between the secondary air supply and the air mask
cylinder will be equal.
If serious leakage is noticed from either of the two female
fittings, or anywhere along the hose, disconnect the female
fittings and return to fresh air immediately. Misuse can
result in serious injury or death.
NOTE: If the secondary air supply does not have a sufficient
volume of air, the air mask cylinder will not reach full service
pressure.
3. Compare the cylinder pressure gauge, the FireHawk M7XT
Control Module pressure gauge to the secondary air sup-
ply pressure gauge reading. If the readings are the same,
pressure is equal.
4. To disconnect the Quick-Fill hose after transfilling, pull the
gray sleeve back. The hose fitting and the URC Assembly
will separate. A hiss or pop may be heard as the fittings
separate and the high pressure air is sealed off.
5. Immediately install the dust cover on the URC Assembly.
6. The air mask cylinder is ready for service if the cylinder
pressure gauge needle is on the appropriate color band.
TRANSFILLING BETWEEN AIR MASKS
NOTE: The air mask with the higher pressure reading is the
donor. The air mask with the lower pressure is the receiver.
Transfilling between users of air masks should be performed
only during life-threatening emergencies or simulated training
exercises. Both donor and receiver must return to fresh air
immediately following the procedure.
DO NOT transfill if the donor's audible alarm is ringing or
FireHawk M7 HUD or I-HUD /FireHawk M7XT Control Module
low pressure alarm indicators are flashing. Failure to follow
this warning can result in shorter escape time to return to
fresh air, causing serious personal injury or death.
The audible alarm begins ringing and heads-up display system
begins flashing to indicate that the pressure in the cylinder has
been reduced to 33% of its rated working pressure. Remaining
service time must be used for escape to fresh air. If the donor's
audible alarm begins ringing or FireHawk M7 HUD or I-HUD/
FireHawk M7XT Control Module begins flashing during trans-
filling, the donor should disconnect and preserve his escape
time.
AUDI-LARM ALARM WITH URC ASSEMBLY
WARNING
WARNING
1. If the donor's alarm is not ringing and FireHawk M7 HUD
or I-HUD/FireHawk M7XT Control Module are not flashing
and you have sufficient air to transfill to a receiver, (greater
than 1500 psi for 2216 psi air masks and greater than 3000
psi for 4500 psi air masks), follow these steps.
a. Remove the 3 foot emergency transfill hose from its
protective pouch.
b. Remove the rubber dust cover from both female fittings
on the transfill hose assembly.
c. Remove the rubber dust cover from the URC fitting.
d. Push the female fittings on to the male fittings until
they click in place. Pull on the hose to be sure it
snapped in place.
If serious leakage is noticed from either of the two female
fittings, or anywhere along the hose, disconnect the female
fittings and return to fresh air immediately. Misuse can
result in serious injury or death.
e. After approximately 45-60 seconds, pressure between
the air mask cylinders will be equal.
f. Disconnect the transfill hose from the air mask by
pulling the gray sleeve back on both ends. A hiss or pop
may be heard as the fittings separate and the high pres-
sure air is sealed off.
g. Immediately install the dust cover on the URC fitting.
The dust cover prevents dirt, water, and debris from
entering the fitting, and acts as a redundant seal.
URC ASSEMBLY LEAKAGE
1. When transfilling in fresh air and the dust cover will not
stay on the male fitting because air is leaking, correct the
condition before using the air mask.
2. When transfilling in a contaminated atmosphere and the
dust cover will not stay on the male fitting because air is
leaking:
a. Immediately reconnect the Quick-Fill hose to seal off
the leak and return to fresh air.
b. If the hose will not reconnect, reach behind and close
the cylinder valve. Air pressure in the regulator will
drop, and the leak will slow down.
c. Quickly replace the protective dust cap on the male fit-
ting. This will form a redundant seal.
d. Open the cylinder valve and return to fresh air immedi-
ately. The dust cover prevents dirt, water, and debris
from entering the fitting, and acts as a redundant seal.
EMERGENCY TRANSFILL HOSE STORAGE
1. Preparing the Emergency Transfill Hose for storage:
a. Press in on the center of the quick-disconnect dust cap
to release any pressure in the transfill hose.
b. Roll up the hose and place it in its protective pouch.
25
WARNING
MSA 314 (L) Rev. 2 - 10128861