Aqua Lung SEA-4500 User Manual page 15

5. Closely examine the pressure
gauge to determine whether the
needle is within the "GREEN ZONE",
indicating that the SEA-4500 cylinder
is full (Fig. 13).
NOTE: The operational range for composite / carbon fiber cylinder
units is 3000 - 4500 PSI (206 - 310 BAR). A 13 cubic inch (63.4 L)
composite / carbon fiber cylinder is equivalent to a 1.5 cubic foot (42.5
L) aluminum cylinder when both are filled to 3000 PSI (206 BAR).
A 17.5 cubic inch (85.5 L) is equivalent to a 2.0 cubic foot (56.6 L)
aluminum cylinder when both are filled to 3000 PSI (206 BAR). Aqua
Lung classifies composite / carbon fiber cylinders by floodable volume
(cubic inch) and aluminum cylinders by expanded volume (cubic feet).
Values in liters are metric expanded capacity.
6. Immerse the SEA-4500 in water to check for any signs of free flow from the
second stage, leakage from the hose, pressure gauge, safety plug assembly, first
stage or cylinder neck. If leakage is found, do not attempt to use the SEA-4500
until it has received service from a qualified technician. When complete, remove
the water from the SEA-4500 1st & 2nd stages and reinstall the mouthpiece cover.
NOTE: If the second stage purge was checked during the filling procedure,
it is not necessary to repeat steps 7 & 8.
7. Briefly depress the purge button to ensure that sufficient airflow is provided
to clear the second stage of water.
8. Immediately after releasing the purge button, listen closely to ensure that the
second stage does not continue to allow any air flow.
9. Turn the valve handwheel clockwise until it is completely closed. In the closed
position, the red indicator ring is visible in the handwheel.
Provided that these pre-issue inspection requirements have all been met,
the SEA-4500 is now ready for use.
GREEN
ZONE
Figure 13
15