User's Manual

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AUDI-LARM ALARM WITH URC ASSEMBLY OPERATION

OPERATION PRECAUTIONS FOR USING THE URC

(

UNIVERSAL RESCUE CONNECTION) ASSEMBLY

. 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

ill 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). In fire service applica-

tions, MSA recommends breathing air quality in accor-

dance with NFPA 1989. 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

o 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,

he 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 fill-

ing 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. In

fire service applications, MSA recommends breath-

ing air quality in accordance with NFPA 1989.

• 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

TAL 708 (L) Rev. 1 - 10082858