Dräger BG ProAir, Instructions For Use Manual

Page: 17 / 34

Maintenance
Instructions for use |
Dräger BG ProAir
17
5.2.3.4 Removing the compressed oxygen cylinder
1. Make sure that the cylinder valve is closed and the closed-
circuit breathing apparatus is completely purged.
2. Open the hook-and-loop fastener and pull the cylinder
strap out of the buckle.
3. Loosen the hand wheel of the pressure reducer. Do not
use any tools for this.
WARNING
Risk of fire!
Contact between high-pressure oxygen and oils, greases,
organic materials or similar contamination may cause a fire.
This can lead to serious physical injuries or death.
► Make sure connections are kept clean and free of dirt.
4. Pull the compressed oxygen cylinder off the connecting
pieces on the pressure reducer and remove it from the
closed-circuit breathing apparatus.
5. Seal the compressed oxygen cylinder with the lock nut.
5.2.3.5 Removing the breathing bag and disassembling
the valves
1. Push both release levers (1). Swivel the spring bridge 90°
and remove it from the closed-circuit breathing apparatus.
2. Release the locking mechanisms between the CO
2
absorber and breathing bag, as well as between the
breathing air cooler and breathing bag:
Push the lock buttons and remove the breathing bag from
the CO
2
absorber and breathing air cooler.
3. Release the drainage valve from the carrying frame.
4. Pull the breathing bag out of the closed-circuit breathing
apparatus. The breathing bag automatically slides off the
minimum valve lever.
5. Disassemble the relief valve:
a. Push the lock buttons and pull the relief valve out of
the breathing bag.
b. Keep hold of the relief valve and rotate the housing
parts (1, 5) against each other to open the valve.
c. Remove the valve disc (3) from the valve seat.
d. Check the valve disc (3) and stepped valve disc (2).
They must be clean and intact and be in contact with
the entire circumference of the valve seat. Replace
faulty valve discs.
e. Check the spring (4). It must not be bent and must be
connected to the lid (5) by a single coil.
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