A Dive Rite first stage with DIN connector and hose assembly is included for the oxygen supply. First stage intermediate pressure (IP) is set to 85 psi for the oxygen regulator. The oxygen regulator IP must be set no higher than 85psi due to the maximum rated pressure of the solenoid.
A diluent regulator and hoses are not supplied with the O2ptima CM. The unit is only intended to be used with an off-board diluent supply and it is up to the diver to supply these components as there are a wide variety of possible configurations.
An over-pressurization valve (OPV) is installed in the oxygen first stage for safety. Because there are no second stages installed there is no other way for excess pressure to be released. The over-pressurization valve must be in place in the event of a first stage high pressure seat failure to prevent high pressure gas from reaching all of the downstream components.
An OPV that is releasing pressure indicates a malfunction and the dive should be terminated immediately. The OPV should be inspected for bubbling during the S-drill at the beginning of the dive.
The first stage needs to be serviced annually by an Authorized Dive Rite service center or directly by Dive Rite. Call Dive Rite directly (1-800-495-1046) or email [email protected] to schedule service.
Braided nylon Airflex LP hoses are used for oxygen gas supply on the Optima CM. Airflex hoses are flexible, yet tough. The hose lengths are optimized for streamlined routing.
A compact SPG on a braided Stainless Steel HP hose is included to monitor oxygen tank pressures. A BAR gauge is used to help simplify gas consumption calculations.
An inline shutoff with safety lock is included. This should be closed any time the oxygen supply hose is disconnected underwater to prevent water from entering the solenoid causing damage or failure to operate. Once the oxygen supply hose is connected, turn the gas supply on and purge the line using the oxygen MAV before opening the inline shutoff. Once the shutoff is open, install the included safety lock clip to prevent accidental oxygen shutoff.