Equipment Maintenance; Use With Nitrox Mixtures - Cressi MC9 Manual De Istrucciones

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Cressi-sub regulators must be serviced once a year and oftener
in case of particularly intensive use.
WARNING: intermediate pressure must be set only at au-
thorized Cressi-sub centres, while the setting values can NOT
and must NOT be modified by the user, in order not to
affect the regulator' s performance. 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:
[email protected]).
In case a regulator is used by more than a divers (diving centres,
clubs etc), we recommend to disinfect it by placing it for 2/3
minutes in a 2% Stereamine G water solution or other similar
pharmaceutical products.
All CRESSI-SUB regulators comply with 89/686/EEC directive of
21/12/1989, checked and certified by N. 0474 RINA – Genoa, with
tests in accordance with EN 250:2000 standard, which provides the
requisites of III class Individual Safety Devices: the device therefore is
EC branded and reports the certifying institu-te indication (0474), as
prescribed by Art. 11A of 89/686/EEC directive.
3.5.2. – Equipment maintenance
Cressi-sub recommend the regulator is serviced at least once a
year, not withstanding the number of dives carried out. Servicing
might also be more frequent according to intensive use.
In both cases, please remember that both the diver' s safety and the
regulator' s performance depend first of all on a correct servicing.
This must include an examination of the equipment, a full over-
haul, and repair (where needed), by an authorized Cressi-Sub
center and must be documented in the Service Record provided
by Cressi-Sub and found in this manual in section 3.7.
In order to ensure the best results, when maintenance operation
are performed, we recommend using all the spare parts provided
by Cressi-Sub in every procedure.
Maintenance (or repair) operations for the equipment must ex-
clusively use original Cressi-Sub spare parts.
Users must never perform maintenance themselves; all mainte-
nance must be performed by an authorized Cressi-Sub center.
If improper maintenance is performed on the equipment, per-
formed by someone other than authorized Cressi-Sub personnel,
or used for purposes other than those specifically intended, re-
sponsibility for proper and safe operations fall to the owner/user.
WARNING: the regulators must be serviced exclusively at
an authorized Cressi-sub centre, using only original spare parts.
Interventions carried out by untrained personnel may cause
high risks to the diver' s health and life. Cressi-sub decline any
responsibility for any servicing or setting of the regulators car-
ried out by unauthorized and uncertified personnel.
NOTE: You can find your authorized Cressi-Sub cen-
ter by asking your dealer, or Cressi Sub S.p.A. itself
by sending an e-mail to: [email protected]

3.6 - Use with Nitrox mixtures

All Cressi-sub regulators are supplied with NBR O-rings and all
inner components are greased with silicone, that guarantee the
best lubrication and protection from salted and corrosive sea
environment.
As proved by tests carried out by NASA (NASA DOCUMENT
TR-900-001), using silicone lubricants is excellent for equipment
using Nitrox hyper-oxygenated mixtures with oxygen percenta-
ge up to 40%.
The most recent European standards EN13949 and EN144/3
prescribe all equipment using mixtures containing more than
22% oxygen to be certified also with a pure oxygen working test,
which is impossible to get through using silicone lubricants.
Cressi-sub regulators are therefore EC certified only for use with
air and mixtures containing less than 22% oxygen and must not
be used, in EEC countries, with hyper-oxygenated mixtures.