Aqua Lung SECOND STAGE Service Manual download pdf (Page 9)

FIRST TO DIVE 9

2. Check opening effort. Apply a gradual inhalation

effort. When the MP starts to fall, release the pressure

and compare the result with the limits shown in Table 5.

Checking Specifications. If the opening effort is

outside these limits consult Table 1. Troubleshooting

Guide.

If the adjusting screw 127823 is not correctly adjusted,

unscrew it until its stop and then screw it to one turn and

3/4 turn. You have the possibility to screw and unscrew

of +/- 1/2 turn from this position to get the suitable

cracking effort.

3. Check depression / flow. Apply an inhalation flow of

400 l/min and check that the depression does not

exceed 15 mbar. If it exceeds this value consult Table 1.

Troubleshooting Guide.

4. Check for leaks. Connect the first stage to a cylinder

charged to 200 bar, open the valve and submerge the

assembly in a bath of water for 1 minute. Check that

there are no leaks. If there are apparent leaks,

disassemble the 2

stage completely and check all

sealing surfaces and the positioning of the parts.

END OF REASSEMBLY

Note: Tests 2,3 et 4 require the use of

a regulator test bench.

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Aqua Lung SECOND STAGE Service Manual Page 9