PRO-PAK
18
4.6 WHISTLE TEST
1. With cylinder valve still closed,
slowly breathe down the air from the
system. Check that the whistle sounds
clearly as the pressure gauge falls to 55
bar (±5 bar).
2. Once the whistle has sounded,
open the cylinder valve fully.
3. DO NOT USE apparatus that fails
this test. Attach an explanatory note and
return for service.
4.7 FINAL CHECKS
1. Check that the cylinder valve(s)
is/are fully open and that the pressure
gauge shows that there is sufficient air.
WARNING:
On Duo models, BOTH cylinder valves
MUST be fully open immediately prior
to and during use.
2. Turn on the DV bypass knob and
check for a steady flow of air into the
mask. Close the bypass knob.
4.8 ATTACHING AN AIRLINE
WARNING:
• Airlines should be at least 15
metres long.
• Use anti-static hoses in
flammable or explosive
atmospheres.
1. Push the airline onto the Pro-Pak
attachment connector.
WARNING:
Close cylinder valve while breathing
from the airline.
2. Give the supply airline a firm tug to
ensure that it is securely connected.
3. Proceed with tasks to be
performed.
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