Pocket; Drain Plug; Auxiliary Air Cylinder; Filling The Auxiliary Cylinder - Aqua Lung MDB Technical Manual

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Pocket

The MDB features two utility pockets on the left lobe of the BC. Each comes equipped with a D-
ring and one with a snap hook.

Drain Plug

The MDB is equipped with two drain caps located on the back of each lobe of the BC. The caps
can be removed to rinse the inside of the bladder.

AuXILIARY AIR cYLINDER

The auxiliary cylinder is attached to the MDB by means of a threaded hand fitting (Fig. 2). Air
is added to the MDB by opening the cylinder valve. Required for closed circuit and semi-closed
circuit diving.

Filling the Auxiliary cylinder

To fill the cylinder, you will need an optional fill adapter w/ GERS connection Aqua Lung part number
840817.
1. Before attempting to fill the auxiliary cylinder, ensure that the fill adapter and valve are
completely dry - especially in the area surrounding the valve outlet. Examine the cylinder markings
to verify that it is rated for a fill pressure of 200 BAR (2,900 PSI).
2. Using a calibrated pressure gauge, check the supply cylinder is filled to 200 BAR (2,900 PSI). It
is very important to ensure that the auxiliary cylinder is filled to its total capacity, but not overfilled.
WARNING: DO NOT attempt to fill the cylinder if the markings indicate that it is rated
for a different fill pressure other than 200 BAR (2,900 PSI). Doing so may result in rup-
ture or explosion in the event of fire or overfilling. Instead, immediately return the unit
to a qualified technician and do not use under any circumstances.
P/N 840558
P/N 840970
Fig. 2
mDB technical manual