Mounting The Regulator To The Tank - Cressi MC9 Manuel D'instructions

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WARNING: After assembling and checking it, the regulator
must be laid down horizontally, in order to prevent any
accidental fall from causing damage to its components or
injury to people.
3.3 – Mountig the regulator to the tank
Before assembling, check the tank has been filled with exclusi-
vely compressed air working pressure, using a suitable com-
pressor, which supplies breathable air in compliance with EN
12021 standards.
We remind that only test certified tanks can be filled within the
lapse of time reported by the certificate itself.
WARNING: check the perfect state of the valves waterti-
ght O-rings. They must not show any cut, scratch or other
damage; they must be replaced anyway at regular intervals of
time, even if being in perfect state, since they are subdued to
the tanks air high pressure and to atmospheric agents as
well. We recommend to use only original Cressi-sub spare
parts.
For yoke connected first stages, use following procedure:
slightly unload the tank, opening its valve a little, in order to free
its end from any residual water. After unscrewing the yoke' s lock
knob, take the protection tap out of it seat and place the first
stage on the air exit valve, checking the second stage is positio-
ned correctly.
Now, screw the yoke' s knob to lock the first stage on the valve.
You do not need to tighten the knob too much.
Open the tank valve, turning it anticlockwise, keeping pressed
the manual supply button of the second stage for a while (this is
to be avoided in cold water).
WARNING: diving in cold water at temperature lower than
10°C/50 °F requires a special technical training. Cressi-sub
recommend such diving only after attending a special training
course by certified trainers. Using underwater equipment in
cold water without adequate training may be dangerous for
the diver' s health and life.
The regulator must absolutely not get wet and exposed to
freezing air before use. Do not press the discharge button, par-
ticularly when the Venturi effect adjustment lever is on "dive". If
possible, keep the regulator in a warm place before use.
We highly recommend, as a rule, to open the tank valve slowly,
so that the regulator gets filled gradually. If the regulator gets pres-
surized too suddenly, in fact, it creates an adiabatic compres-
sion of the breathable gas inside the 1st stage, that might cause
the equipment to work imperfectly.
As soon as you hear air flowing out of the second stage, stop
pressing the manual supply button and open the valve fully. It is
advisable to turn the valve clockwise for a quarter, in order to
avoid damaging the poppet thread.
For DIN connection first stages, assembling does not differ a lot
from that described above.
You just have to screw the connection directly onto the valve,
without tighten too much.
In case a second independent regulator is used, connect it to
the additional valve outlet following the above instructions.
WARNING: Do not turn the first stage connected with the
tank when the system is pressurized; do not use the first
stage connected with the valve as a handle to carry the
equipment: it might damage the regulators, its O-rings and
the valves.
WARNING: if the hoses are not positioned correctly, do
not try to arrange them well when the regulator is pressuri-
zed. Close the tank, depressurize and, only then, position
the hoses correctly.