Aqua Lung Micra Air System User Manual page 12

12 Micra Air System Owner's Manual
9. To conserve the limited air supply of the M.A.S., it is
strongly recommended that you perform a pre-dive
inspection of the second-stage purge while it is connected
to the supply cylinder as follows:
a. Depress the purge button to ensure that sufficient
airflow is provided to clear the second-stage of water.
b. Immediately after releasing the purge button, listen
closely to ensure that the second-stage
does not continue to flow any air.
10. While holding the first-stage and fill
adapter secure, turn the M.A.S. cylinder
clockwise until it stops and the indicator
pin is positioned to the far right inside
the aperture marked "OFF." (See Fig.
8.) Turn the handwheel of the supply
cylinder valve clockwise until shut.
11. Hold the second-stage purge button
depressed until airflow can no longer be
heard from the second-stage and the LP
hose between the first and second
stages is completely depressurized.
12. While supporting the M.A.S. cylinder with one hand,
turn the yoke screw of the fill adapter counter-clockwise
to loosen until the complete system can be lifted off and
removed from the supply cylinder valve.
13. While holding the M.A.S. secure, turn the fill adapter
counter-clockwise at the fitting to loosen and remove
from the first-stage. Replace the dust cap over the inlet
fitting, and tighten the yoke screw until finger snug.
14. Remove the pressure gauge assembly from the protector
cap which is connected to the fill adapter. (Place the
protector cap securely over the threaded nozzle of the fill
adapter and set aside.) Examine the pressure gauge
assembly to ensure that the O-ring appears to be clean
and dry, without any signs of decay or damage, and is
seated evenly at the base of the threads. If the O-ring
appears to be in worn or damaged condition, it is impor-
tant to obtain a new O-ring from an Authorized Aqua
Lung Dealer before attempting to use the M.A.S.
Aqua Lung International, Inc.
Fig. 8 -
"Off" Position