URC ASSEMBLY OPERATION
1. If you are in fresh air and the dust cover will not stay
on the URC Assembly because air is leaking, correct
the condition before using the SCBA.
2. If you are filling the URC Assembly in a contaminated
atmosphere and the dust cover will not stay on the
URC Assembly because air is leaking:
a. Immediately reconnect the Quick-Fill System hose
to seal off the leak and return to fresh air.
b. If you cannot reconnect the hose, 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 URC
Assembly male regulator fitting. This will form a
redundant seal.
d. Open the cylinder valve and return to fresh air
immediately. The dust cover prevents dirt, water,
and debris from entering the fitting and acts as a
redundant seal.
The audible alarm with URC Assembly begins ringing and
NightFighter Heads-Up Display System begins flashing to
indicate that the pressure in the cylinder has been
reduced to 25% of its rated working pressure. 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 709 (L) Rev. 4 - 10058881
