ENGLISH
17) open the four way valve after having exhaled as described above (lever up) (Fig. 38);
18) check that you can inhale and exhale deeply from the mouthpiece without any effort or obstruction;
19) slightly press the palm lever positioned on the flow regulator goup to check the bypass valve operation (Fig. 39);
20) dive just enough to make a final check of buoyancy and general wellbeing.
As soon as all checks have been successfully carried out you are ready to dive.
During the dive, when the lower tank pressure gauge (each gauge must be clearly identified with a different colored cover) reading
approaches 20 bars, it is time to add the upper tank into the breathing loop by rotating the cam positioned on the flow regulator group
forward lator. (Fig. 40).
DANGERDANGER
The user must be perfectly aware that the tanks’ pressure has to be constantly checked while diving. It really
dangerous to continue breathing in the closed loop with a tank pressure below 20 bars. The secondary tank can
be add into the loop at any time, without necessarily waiting for the primary tank to be empty. Failure to
observe these precautions can be extremely dangerous, and may cause serious or even fatal accidents to the
diver.
Should the diver, for any reason, abandon the mouthpiece while underwater or on the surface, it is essential to close the four way valve
at once by placing its lever in the downward position.
To resume underwater breathing by the mouthpiece, proceed as follows:
1) place the mouthpiece in your mouth with the four way valve closed (lever in downward position);
2) blow forcefully into the mouthpiece to expel the water from its small inner chamber;
3) place the four way valve lever in the up position (open) and start breathing.
DANGERDANGER
It is extremely dangerous to lose contact with the mouthpiece while underwater. You must always first close the
four way valve, by placing the lever in the downward position. Rebreather block may occur when water enter the
gas loop. A sudden negative-buoyancy situation may mean the breathing loop has somewhat given up, and
flooding has occured. If such a situation should arise immediately switch to the emergency regulator and
abandon he dive. Failure to observe these cautions can be extremely dangerous, and puts the diver at risk of
serious or even fatal accidents.
13
AZIMUTHAZIMUTH
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