CWD
COLD WATER DIVING KIT FOR MARES REGULATORS
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WARNING
CAREFULLY READ THIS INSTRUCTION MANUAL BEFORE USE, AND KEEP IT FOR FUTURE REFERENCE.
Introduction
Congratulations on your purchase of a MARES product. This product is part of MARES's new family of advanced high performance
underwater life support systems. It is designed, manufactured and tested by experienced divers.
For over 40 years, MARES has been an industry leader in dive innovation and technology.
EN 250: 2000 CERTIFICATION
The MARES CWD kit described in this manual has been tested and certified by Registered Test Centre No. 0426 - Italcert - Viale Sarca
336, Milano - I, in compliance with EC directive 89/686/EEC of 21 December 1989 as a component part of MARES regulators suitable for
use in cold water (temperatures below 10°C). The test procedures were conducted according to the EN 250: 2000 standard, in
conformance with the aforesaid directive which sets out the conditions for marketing and essential safety requirements for Personal
Protective Equipment (PPE), regarding quality assurance for the product and according to the provisions of European Standard EN 250:
2000.
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WARNING
The CWD kit must be installed by an authorized MARES repair shop or by a technician who is an expert in regulator
maintenance, following the instructions provided here. It is advisable to conduct a complete check on the regulator before
installing the CWD kit.
INSTRUCTIONS FOR USE
COLD WATER DIVING
According to standard EN 250: 2000, cold water is defined as temperatures below 10°C.
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WARNING
Attempting to dive in cold water conditions (10°C or less) without adequate training may result in serious injury. Before
diving in cold water, it is advisable to take a special training course under the supervision of a certified diving instructor.
When diving in cold water conditions, parts of the regulator may be subject to "icing" phenomena. The variables that influence the
possibility of ice forming inside and above the regulator are: external ambient temperature, the temperature of the water, the temperature
of the air in the tanks (and therefore the period in which the tanks were exposed to the cold before the dive), freshwater as opposed to
salt, the humidity level of the air in the tanks, the amount of air demanded through the regulator during the dive, and breathing rhythm.
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WARNING
Since it is not possible in practice to maintain control over all of these variables and therefore to prevent the second stage
from icing in every possible situation, even MARES regulators equipped with the CWD kit may demonstrate "icing"
phenomena. In this event, regulators may not function properly. This may result in serious injury. Therefore, to minimize the
potential hazards, it is essential to be adequately trained in the prevention and handling of the problems which may arise
from a regulator subject to "icing" phenomena.
Particularly in these situations, the following precautions should be observed:
1. Take a course to learn cold water diving techniques.
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2. Refill the air tanks only at filling stations equipped with an efficient filtering and moisture removal system.
3. When preparing for a cold water dive, keep the tanks and regulator in a place that is sheltered from the cold until just before starting
the dive.
4. Open the tank control valve for one or two seconds to make sure there are no water droplets or small ice crystals. Also check the inlet
opening of the regulator.
5. In the event of repetitive dives, take special care to ensure that the regulator is perfectly dry before starting the second dive.
6. Avoid using the regulator out of the water.
7. Insofar as possible, avoid allowing any water to enter the second stage during the dive.
8. Only press the purge valve underwater.
9. Use the purge button as little as possible. In any event, do not keep it pressed for more than two or three consecutive seconds; longer
periods could cause ice to form.
10. Try to breathe normally in order to minimize the cooling effect produced by the higher air velocity during overbreathing.
ASSEMBLY INSTRUCTIONS
(reserved for the installing repair shop)
To mount the CWD kit correctly you must consult the maintenance manual.
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WARNING
Do not pierce or prick the diaphragm and avoid directing powerful jets of water against it (as for example from a hose). This
could puncture the diaphragm or displace it, leading to subsequent oil leaks or infiltration of water. In these cases it is
necessary to disassemble the CWD kit, replace the diaphragm, and repeat all assembly operations.
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cod. 46185405 - Rev. A - 11/04 - printed by BCD - 2.000 - 11/04 - ArtBooK 1259/04
HTM SPORT S.p.A. - Salita Bonsen, 4 - 16035 RAPALLO - ITALY - Tel. +39 01852011 - Fax +39 0185669984
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