AUDI-LARM ALARM WITH URC ASSEMBLY OPERATION
OPERATION PRECAUTIONS FOR USING THE URC
ASSEMBLY
1. The URC Assembly can only be used to fill approved
air mask cylinders.
2. The URC Assembly is not to be used as a "Buddy
Breather" such that two users are sharing the air sup-
plied by one air mask cylinder simultaneously doing so
will void NIOSH approval.
3. The user is responsible for the air supply, which must
meet the requirements of Compressed Gas
Association Specification ANSI/G-7.1, Quality
Verification Level (Grade) D Gaseous Air or better, with
a moisture dew point of not greater than -65°F
(24ppm water vapor, normal). Pressures at the inlet of
the quick-fill hose must not exceed that of the air
mask (2216 psi or 4500 psi).
4. Using the 3000 psi URC Assembly to fill cylinders, the
cylinder can only be filled to 2216 psi. If the pressure
exceeds 2216 psi a relief valve in the URC Assembly
will vent at approximately 2525 psi or as low as 2400
psi. A 3000 psi cylinder can only be filled to 3000 psi
by using a secondary air supply; the 3000 psi URC
Assembly cannot be used for filling a 3000 psi cylinder.
5. The user also is responsible for connecting the quick-
fill hose to an appropriate secondary air supply.
6. The cylinder must be inspected for damage before
charging.
7. If filling cylinders in fresh air using the URC Assembly
topping off the cylinder is recommended after the
cylinder has cooled from initial fill. Topping off a cylin-
der after it has cooled will ensure proper service time.
All NFPA 1981:2007 approved air masks are equipped
with a URC Assembly (Universal Rescue Connection) fit-
ting. The URC Assembly is a male quick-fill inlet for use
by Rapid Intervention Crews for emergency filling opera-
tions. The system also includes an automatically resetting
pressure relief valve. The air mask can also be equipped
with a shoulder mounted Quick-Fill System, unless using
a 3000 psi URC Assembly, the 3000 psi URC Assembly
can not be used with Quick-Fill System. For additional
information on using the Quick-Fill System, refer to the
Quick-Fill System section of the manual.
•
DO NOT use the URC Assembly as a "Buddy
Breather" such that two users are sharing the air
supplied by one approved air mask cylinder simul-
taneously; doing so will void NIOSH approval.
•
The URC Assembly must be used by trained Rapid
Intervention Crews only using procedures devel-
oped for rapid intervention.
•
DO NOT install a Quick-Fill System and 3000 psi
URC assembly on the same air mask. Combining
these assemblies on the same air mask will not
allow the relief valve in the 3000 psi URC Assembly
to open as designed. Failure to follow this warning
can result in serious personal injury or death.
•
DO NOT transfill (be a donor) using a 3000 psi URC
Assembly. The 3000 psi URC Assembly has a
check valve that does not allow cylinders to trans-
fill (be a donor).
•
Using the 3000 psi URC Assembly to fill cylinders,
the cylinder can only be filled to 2216 psi. If the
pressure exceeds 2216 psi a relief valve in the URC
Assembly will vent at approximately 2525 psi or as
low as 2400 psi. A 3000 psi cylinder can only be
filled to 3000 psi by using a secondary air supply;
the 3000 psi URC Assembly can not be used for
filling a 3000 psi cylinder.
•
DO NOT lubricate the URC Assembly fittings. Do
not permit oil, grease, or other contaminants to
come in contact with the quick-fill fittings.
•
The hose assemblies and fittings are designed to
be used with Quality Verification Level (Grade) D or
better air as defined by ANSI/CGA G-7.1.TRANS-
FILLING AIR FROM A SECONDARY AIR SUPPLY.
•
DO NOT use any transfilling hose assembly or fit-
tings other than those supplied by MSA specifically
for the URC Assembly for filling operations.
Failure to follow the above warnings can result in seri-
ous personal injury or death.
Note:
The URC Assembly may be used for transfill opera-
tions as described in this manual. Standard operating pro-
cedures should be developed for use of the URC
Assembly.
The URC Assembly must be used only by qualified, trained
personnel who have carefully read and understood these
instructions, cautions, and warnings. NIOSH approvals of
SCBA from MSA are maintained while transfilling air
only
if
appropriate hose assemblies from MSA are used. URC
Assembly or hose assemblies and fittings are rated for a
maximum working pressure of 4500 psi. NIOSH approval
is maintained only when using the following hose assem-
blies: 485331, 802687, 802688, 802689, 802690, and
48332, for filling cylinders in IDLH atmospheres.
A secondary air supply stores compressed breathing air
until needed to refill air mask air cylinders. When transfill-
ing, the secondary air supply pressure must be greater
than air mask cylinder pressure. Examples of air supplies
include: cascade air cylinder refilling systems; high pres-
sure compressor systems with a fixed reservoir; or a
portable air system such as the RescueAire™ System.
DO NOT connect a High Pressure air mask to a sec-
ondary air supply with a pressure greater than 4500
psi. The high pressure air mask is rated for a maxi-
mum working pressure of 4500 psi. Failure to follow
the above warnings can result in serious personal
injury or death.
31
TAL 803 (L) Rev. 1 - 10086011
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