GB
MSA Using the Compressed Air Breathing Apparatus
AirGo 33
(8) Proceed as described from (9) to (14) for pressure reducer with thread
connection.
3.4. Donning the Compressed Air Breathing Apparatus
(1) Check all components of the compressed air breathing apparatus for defects
and malfunctions.
(2) Don breathing apparatus with shoulder straps fully extended.
(3) Close hip belt and tighten loose ends towards the front.
(4) Tighten shoulder straps until back plate fits comfortably.
(5) Adjust shoulder straps to achieve a comfortable weight distribution between
shoulder straps and hip belt.
(6) If required, connect lung governed demand valve to medium pressure
connection ( Operating Manual for lung governed demand valve).
3.5. Condensed Check Prior to Use
(1) Ensure that lung governed demand valve is closed.
(2) Open cylinder valve(s) and check pressure on the pressure gauge.
The pressure values must read:
for 300 bar cylinders: minimum 270 bar
for 200 bar cylinders: minimum 180 bar
(3) Close cylinder valve(s) and check pressure gauge.
The pressure must not drop more than 10 bar in 60 seconds.
(4) Carefully activate flushing mode of lung governed demand valve, closing exit
port as much as possible.
(5) Observe the pressure gauge.
The warning signal must sound at 55±5 bar.
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