72
UAC Fitting
G1 SCBA 2018 Edition
US
13 UAC Fitting
The universal air connection (UAC) fitting is a male coupling for use by rapid intervention teams for
emergency filling operations. In accordance with the requirements of NFPA 1981, Standard on Open-
Circuit Self-Contained Breathing Apparatus (SCBA) for Emergency Services, the SCBA is equipped
with one RIC UAC fitting located on the pressure reducer. The SCBA can be equipped with an optional
Remote Quick-Fill system that includes an additional UAC fitting. For SCBA with 2216 or 4500 psi
systems, either the RIC UAC fitting or the Remote Quick-Fill UAC fitting can be used for the filling and
transfilling operations described in this manual. SCBA with a 5500 psi operating system will not trans-
fill.
Users are responsible for developing standard operating procedures for use of the UAC fitting.
13.1 Precautions
WARNING!
Do NOT use the UAC fitting if there is any possibility that the environment contains a CBRN
warfare agent. The UAC fitting is not approved for filling operations in atmospheres containing
CBRN warfare agents.
Do NOT use the UAC fitting as a buddy breather (two users sharing the air supplied by one
approved SCBA cylinder simultaneously). Doing so voids NIOSH approval.
Do NOT try to transfill SCBA with a 5500 psi operating system.
Only qualified, trained personnel who have carefully read and understood these instructions,
cautions, and warnings should use the UAC fitting.
Do NOT lubricate the UAC fittings.
Do NOT let oil, grease, or other contaminants have contact with the UAC fittings.
For transfilling air from a secondary air supply, the hose assemblies and fittings are designed to be
used with CGA G-7.1, Section 2.1, Quality Verification Levels (Grades) D, or higher quality air. In
fire service applications, MSA recommends breathing air quality in accordance with NFPA 1989,
Standard on Breathing Air Quality for Emergency Services Respiratory Protection.
Failure to obey these warnings can result in serious injury or death.
The UAC fitting can only be used to fill approved SCBA cylinders.
The user is responsible for the air supply, which must meet the requirements of CGA G-7.1,
Section 2.1, Quality Verification Levels (Grades) D, or higher quality, with a moisture dew point not
more than -65°F (-54°C) (24 ppm water vapor, normal). In fire service applications, MSA recommends
breathing air quality in accordance with NFPA 1989, Standard on Breathing Air Quality for Emergency
Services Respiratory Protection.
Pressures at the inlet of the Quick-Fill hose must not exceed that of the SCBA (2216 psi, 4500 psi,
5500 psi).
The user is responsible for connecting the Quick-Fill hose to an appropriate secondary air supply.
Examine the cylinder for damage before charging.
When topping off the cylinder pressure using the UAC fitting, MSA recommends waiting until the
cylinder has cooled from the initial fill to a temperature of 70°F (21°C) to provide the maximum service
time.
To make sure the SCBA is in a configuration approved by NIOSH 42 CFR Part 84, use only MSA-
approved hose assemblies during transfilling procedures.
To Next Page
Loading...
