Cressi MC9 Manual De Istrucciones página 59

40 FIRST STAGES
WARNING: intermediate pressure must be set only at
authorized Cressi-sub centres; the setting values must NOT and
can NOT be modified by the user, in order not to affect the good
working of the regulator. Cressi-sub decline any responsibility for
any intervention carried out by unauthorized personnel.
You can find your authorized Cressi-Sub center by
asking your dealer, or Cressi Sub S.p.A. itself (email:
info@cressi-sub.it).
Balanced diaphragm first stage features a light compact structure
in chromium-plated brass with inner components in stainless steel,
chromium-plated brass and state-of-the-art thermoplastic resins.
It is supplied with four low pressure (LP) 3/8" ports - specially
angled to allow the best hose positioning, avoiding any encum-
brance among different devices - and two high pressure (HP)
7/16" ports with a micrometric air exit hole, guaranteeing maxi-
mum safety even in the case of damage to the high pressure
hose, since it greatly reduces air loss from the thank.
WARNING: an underwater pressure gauge or a computer
with such function must be connected with the HP ports of
the first stage.
Since the tanks are not supplied with a reserve device, a pres-
sure gauge must always be used, reporting the progressive
air consumption by diving and the reaching of reserve pres-
sure, which has to be considered as not to be used by diving
but only as emergency air supply.
Diving without any gauge is dangerous, since the diver can
not control his own air reserve, which might suddenly run out,
at his own high risk.
The first stage can be connected to the tank valve with an inter-
national, by means of an extremely modern designed bracket, or
with a threaded connection DIN 300 (EN 12209-1-2-3) bar, both-
complying with EN 250:2000 standard.
Like all Cressi-sub regulators, whose components are often in-
terchangeable one with the other, MC9 is compatible with other
diaphragm first stages of the present range.
MC9 balanced diaphragm first stage, like other Cressi-sub diaph-
ragm first stages as well, is to be recommended rather than other
piston models, by diving in suspension or mineral salts rich water,
or in cold water at temperature lower than 10 °C/50 °F. All inner-
components of the regulators are in fact perfectly watertight.
For extreme conditions diving, we recommend our model MC9
SC, supplied with a special Seal Chamber S.C..
WARNING: In case of dives in cold water (temperature less
than 10°C/50° F), Cressi-sub recommend to use a tank supplied
with a valve featuring two separate outlet ports, with which two
complete regulators are to be connected.
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. The regulator must absolutely not
get wet and exposed to freezing air before use. Do not press
the discharge button, particularly when the Venturi effect
adjustment lever is on "dive". If possible, keep the regulator in
a warm place before use.
The Seal Chamber' s task is to make MC9 balanced diaphragm
first stage perfectly watertight, preventing water from seeping
inside or on the diaphragm and the main spring: it works as an air
chamber above the regulator and its components, like a real
thermal barrier. It avoids any problem caused by contact with
suspension, sand, mineral salts rich water and with cold water,
which might eventually cause the regulator to freeze, especially
at temperature lower than 10° C/50° F.
fig. 2