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- Check the submersible pressure gauge, making sure that it indicates the expected tank pressure and that this pressure is sufficient for
the planned dive.
- Check for any leaks in the connection between the tank and regulator. If a leak is found, it may be due to incorrect assembly of the
regulator on the tank valve, or to a damaged O-ring inside the tank valve.
- To ensure that the air delivery of the regulator is correct, first exhale through the mouthpiece to expel any impurities from the second
stage, then inhale. Repeating these actions a few times will allow you to quickly identify any major problems.
DURING THE DIVE
When the regulator is not in the diver's mouth, free-flowing may occur. This problem can be easily eliminated by turning the regulator
upside down and filling it with water (Fig. 7). If the regulator continues free-flowing, the dive should be interrupted.
AFTER-DIVE OPERATIONS - MAINTENANCE
Your regulator should ideally be rinsed with fresh water when it is still pressurized. This allows the second stage to be thoroughly washed
without introducing any impurities into its important sealing components. Rinse the first stage, and also run water into the second stage
mouthpiece and out through the exhaust ports. If the regulator is not pressurized, do not press the purge valve during washing. Pressing
the purge valve would allow impurities to enter the valve seat, which might give rise to leaks. To prevent contamination of the filter and first
stage, do not allow water to enter the air inlet of the first stage. Place the dust cap on the first stage filter and secure it with the yokenut
(Fig. 8). Allow the regulator to dry completely before putting it away. If the regulator is stored for prolonged periods in environments that are
greasy, dusty or exposed to direct sunlight, some of its components might be damaged. Lubricants are not necessary, and in fact should
not be used in routine maintenance operations.
WARRANTY CARD
On purchasing a MARES regulator you will receive a permanent "Original Owner Identification Card" made of durable plastic. This card is
embossed with the model and serial number of your regulator. Write your name and sign in the spaces provided. Keep this card, which
may be used at any Authorized MARES Service Centre world-wide for servicing the regulator.
!!
WARNING
The correct operation of your regulator also depends on proper maintenance. It is therefore advisable to have your
regulator serviced at least once a year by an authorized MARES service center. In particular, it is recommended to replace
the first stage valve after 2 years of use or 200 hours of diving. Failure to observe this precaution may result in serious
injury or death.
!!
WARNING
Do not use any type of adapter to attempt to connect the low pressure hose to the high pressure port, as this may lead to
serious injury.The low pressure components are not constructed to withstand pressures higher than 285 psi.
!!
WARNING
When opening the air valve, press the purge valve of the second stage. This helps to reduce the impact on the valve (Fig. 6).
DO NOT PERFORM THIS OPERATION AT AMBIENT TEMPERATURES BELOW 10°C (50°F). COLDER TEMPERATURES MAY
RESULT IN ICING OR FREE-FLOW.
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