User's Manual

AUDI-LARM ALARM WITH URC ASSEMBLY OPERATION
the above warnings can result in serious personal
i
njury or death.
FILLING INSTRUCTIONS FOR USING THE URC
ASSEMBLY
F
or Rapid Intervention Crews:
Note: Rapid Intervention Crews should use a separate air
supply such as MSA’s RescueAire portable air supply sys-
tem to fill the air mask in an IDLH atmosphere.
NIOSH DOES NOT approve the use of the URC
Assembly to transfer air from the cylinder of one air
mask to another air mask. Failure to follow this warn-
ing can result in serious personal injury or death.
1. Connect the quick-fill hose to the air supply source or
donor air mask.
a. Push the female fitting of the hose on the male fit-
ting until it snaps in place. Pull on the hose to be
sure the fitting snapped into place.
b. Turn the air supply on.
If there are leaks from either female fitting, or along
the hose, depressurize the hose and correct the prob-
lem. Such leakage can result in increased fill time.
Failure to follow this warning can result in serious per-
sonal injury or death.
2. Attach the quick-fill hose to the URC Assembly or
shoulder mounted quick-fill fitting (optional).
a. Remove the rubber dust cap from the male inlet fit-
ting on the URC Assembly or quick-fill fitting. Be
sure that the cylinder valve is fully opened.
b. Remove the rubber dust cap from the female fitting
on the quick-fill hose.
c. Push the female fitting of the hose onto the male fit-
ting of the URC Assembly or quick-fill fitting until it
snaps in place. Pull on the hose to be sure the con-
nection is secure. Filling immediately begins when
the female fitting fully engages with the URC
Assembly or quick-fill fitting.
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, discon-
nect the female fittings and return to fresh air immedi-
ately. Failure to follow this warning can result in seri-
ous personal injury or death.
Note: If the secondary air supply does not have a suffi-
c
ient volume of air, the air mask cylinder will not reach full
service pressure.
3. Compare the air mask cylinder gauge and the
FireHawk M7 Control Module gauge to the secondary
air supply pressure gauge reading. If the readings are
the same, pressure is equal.
4
. To disconnect the quick-fill hose after transfilling, pull
back the gray sleeve on the female fitting of the quick-
fill hose. 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 or shoulder mounted quick-fill male fitting.
6. The air mask cylinder is ready for service if the cylin-
der pressure gauge needle is on the appropriate color
band.
ADDITIONAL INSTRUCTIONS
1. If in a fresh air environment and the dust cover will not
stay on the URC Assembly because air is leaking, cor-
rect the condition before using the air mask.
2. When filling the URC Assembly in an IDLH atmos-
phere and the dust cover will not stay on the URC
Assembly 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 cannot be reconnected, reach behind
and close the cylinder valve. The pressure in the air
mask will drop, and the leak will slow down.
c. Quickly replace the protective dust cap on the URC
Assembly or shoulder mounted quick-fill male fit-
ting. This will form a redundant seal.
d. Immediately open the cylinder valve and return to
fresh air.
If the Audi-Larm Alarm begins ringing, the FireHawk M7
HUD flashes a single red LED, or the alarm button on the
FireHawk M7 Control Module flashes red indicating that
the pressure in the cylinder has been reduced to 25% of
its maximum working pressure, return to fresh air immedi-
ately. The remaining service time must be used for escape
to fresh air.
Note: Only persons trained in MSA Maintenance are
authorized to repair or disassemble the URC Assembly. If
repairs are required, contact your nearest MSA office. Call
1-800-MSA-2222.
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TAL 708 (L) Rev. 1 - 10082858