Cressi MC7 Manuel D'instruction page 51

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3.1 - Use of the SCUBA and Risk Assessment
Before using any Scuba diving equipment, you should complete
a proper diving course.
Do not attempt to dive if weather is bad or your physical condi-
tion is inadequate.
Always watch out for underwater currents, rough sea, extreme-
ly cold water and low visibility.
If you are suffering from emotional and physical stress, bad
digestion, or if you lack training, diving can become dangerous.
The safety risk of diving is greater if you have not gone diving for
a long period of time, as your skill level has diminished.
All Cressi-sub regulators are manufactured with first quality anti-
corrosion materials for use in total safety.
All open circuit air regulators are designed for use down to 50 m
(150ft) depth, in compliance with UNI EN 250:2000. We recom-
mend not exceeding 40 m (120ft) of depth for recreational div-
ing.
3.2 - Checks Before Use
Always check your cylinder pressure before entering the water.
Test the regulator by pressing the purge button repeatedly to
make sure that air is flowing properly. Holding the mouthpiece
between your teeth, inhale and exhale deeply to check if the
regulator and the exhaust valves are working well. Additionally,
check your octopus in the same manor.
Check for air leaks at connections, hoses or leaking from the
regulator.
Warning: When the regulator has been assembled on the
cylinder, the equipment has to be laid horizontally to prevent
accidental falls from causing damage to components or injury
to people.
3.3 - Assembly of the Regulator on the Cylinder
Before assembling the regulator, make sure that the cylinder has
been filled with compressed air at a proper working pressure.
Use a suitable compressor able to supply breathable air in com-
pliance with UNI EN 12021.
Warning: Always remember to check the cylinder valve O-
ring. If it shows cuts, scratches or abrasions, replace it. Even if
it is intact, it has to be replaced every 3 months because it is
constantly exposed to the cylinder high pressure and to
weathering. It is advisable to only use Cressi-sub original spare
parts.
The instructions indicated below must be followed for 1st Stage
with yoke connections:
Unscrew the yoke screw, remove the dust cap and place it
against the valve outlet, after making sure that the 2nd Stage is
on the suitable side.
Tighten the yoke screw to connect the 1st Stage. Do not over-
tighten.
Open the cylinder valve counterclockwise and keep the 2nd
Stage purge button pressed until the air starts flowing. Release
the button and open the cylinder valve completely.
In order not to damage the thread, it is advisable to turn the valve
1/4 of a turn clockwise.
The assembly of the 1st Stage with DIN connection is not very
different from the procedure described above. In this case, the
connection must be screwed directly on the valve outlet without
over-tightening.
When using a second independent regulator, connect it to the
additional valve outlet following the above instructions.