Aqua Lung Apeks Regulator - Manual (Page 27)

US
27
Attaching the First Stage to a
Cylinder Valve (Yoke Connection)
WARNING: OPEN VALVES SLOWLY TO AVOID OVER-
PRESSURISATION. When pressurising your SCUBA system,
be sure to open the cylinder valve slowly to minimise the
generation of heat. Failure to do so, with Enriched Air Nitrox
(EAN) present, increases the risk of combustion that can lead
to serious injury or death.
It is considered safe practice, especially when using EAN, to open the
cylinder valve slowly and let the first stage pressurise slowly. Rapid
pressurisation causes adiabatic compression of the breathing gas,
which generates heat inside the first stage. Heat, along with elevated
percentages of oxygen and an ignition source (from contamination)
are the ingredients that can cause combustion. This is why it is
necessary to keep the interior of the regulator clean, along with the
slow opening of the cylinder valve. For regulators over 21% oxygen
please see pages 6,7and 8.
1. Check the second stage IVS/RVS control switch to ensure that it is
set to the “MIN” (–) position prior to connecting your regulator to the
cylinder.
2. If present, gently turn the inhalation
control knob “in” (clockwise), only
until it stops. Do not apply excessive
pressure.
3. If you are using a cylinder with a yoke
connection valve, check the cylinder
valve O-ring is fitted and not worn or
damaged. If you are using a high
pressure cylinder with a DIN connection
valve, remove the protector cap from
the first stage to inspect the sealing
O-ring of the DIN connector. If the
sealing O-ring is damaged or worn,
replace it before mounting the regulator
on the cylinder valve.
Regulator Owner’s Manual
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