Specifications

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URC ASSEMBLY OPERATION

All NFPA 1981-2002 approved SCBA are equipped with a

URC Assembly (Universal Rescue Connection) fitting. The

URC Assembly is a male quick-fill inlet for use by Rapid

Intervention Crews for emergency filling operations. The

ystem also includes an automatically resetting pressure

elief valve. The SCBA can also be equipped with a shoul-

er mounted quick-fill system, unless using a 3000psi

URC Assembly, the 3000psi URC Assembly can not be

used with Quick-Fill System.

• The URC Assembly is not to be used as a "Buddy

Breather" such that two (2) users are sharing the

air supplied by one (1) approved SCBA cylinder

simultaneously; doing so will void NIOSH approval.

Failure to follow the above warnings can result in

serious personal injury or death.

• The URC Assembly must be used by trained Rapid

Intervention Crews only using procedures devel-

oped for rapid intervention.

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 or Quick Fill System.

Do not install a Quick-Fill System and 3000psi URC

assembly on the same air mask. Combining these

assemblies on the same air mask will not allow the

relief valve in the 3000psi URC Assembly to open as

designed. Failure to follow this warning can result in

serious personal injury or death.

The URC Assembly must be used only by qualified,

trained personnel who have carefully read and understood

these instructions, cautions, and war

nings. NIOSH

approvals of SCBA from MSA are maintained while trans-

filling air ONLY if appropriate Quick-Fill hose assemblies

from MSA ar

e used. URC Assembly or Quick-Fill hose

assemblies and fittings are rated for a maximum working

essure of 4500psig.

NIOSH approval is maintained only when using the follow-

ing Hose Assemblies:

485331, 802687, 802688, 802689, 802690, and 48332, for

filling cylinders in IDLH atmospheres.

• Do not Transfill (be a Donor) using a 3000psi URC

Assembly. The 3000psi URC Assembly has a check

valve that does not allow cylinders to Transfill (be a

donor). Failure to follow this warning can result in

erious personal injury or death.

•

Using the 3000psi URC Assembly to fill cylinders,

he cylinder can only be filled to 2216psig. If the

pressure exceeds 2216psig a relief valve in the

URC Assembly will vent at approximately 2525psig

or as low as 2400psig. A 3000psig cylinder can only

be filled to 3000psig by using a secondary air

source; the 3000psi URC Assembly can not be

used for filling a 3000psig 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 Quick-Fill

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 SOURCE.

Failure to follow the above warnings can result in seri-

ous personal injury or death.

For Filling Operations using the URC Assembly, do not

use any transfilling hose assembly or fittings other

than those supplied by MSA specifically for the URC

Assembly or Quick-Fill System. Use of any other

transfilling hose assembly, fitting, or cylinder can

result in serious personal injury or death, and will void

NIOSH approval.

A secondary air source stores compressed breathing air

until needed to refill SCBA air cylinders. Secondary air

source pressure must be greater than air mask cylinder

essure. Examples of air sour

ces include: cascade air

cylinder refilling systems; high pressure compressor sys-

tems with a fixed reservoir; and an SCBA air cylinder

which is not installed on an SCBA.

Do not connect a High Pressure SCBA to a secondary

air source with a pressure greater than 4500psig. The

high pr

essure air mask is rated for a maximum work

ing pressure of 4500psig. Failure to follow the above

warnings can result in serious personal injury or

death.

AL 606 (L) Rev. 16 - 10023638

WARNING

ARNING

WARNING