Aqua Lung Conshelf XIV User Manual page 10

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10. Switch the FCD to the open position. Depress the purge button momentarily
to ensure that sufficient airflow is provided to blow out any dust or debris which
may have entered the second stage.
11. Perform a breathing and FCD function test as follows:
• Switch the FCD to the closed position. Slowly inhale from the second stage
regulator, there should be no air flow.
• Switch the FCD to the open position. Slowly inhale from the second stage
regulator, there must enough air delivered for you to breathe easily without
noticeable resistance.
NOTE: If a FCD is being used on the primary and octopus second stages,
both must be tested prior to the dive to ensure proper function.
12. Ensure the FCD is in the open position prior to starting the dive (Fig. 4).
NOTE: A breathing and FCD function test must be performed on both the
primary and octopus second stages prior to the dive to ensure they are
working properly.
Conshelf XIV User's Manual
Figure 4