Quote: (Originally Posted by
Drmike)
I can imagine a scenario where wet cells led to solenoid firing and loop venting. Over an hour the O2 supply could become exhausted. ....
If the unit is staged with the OPV facing down and lowest part of loop this risk should be negated, as once cl pressure has dropped to ambient water wont go 'uphill' into the CL through a leaking opv.
The unit may have been staged down, however if the CL filled with gas they would have become buoyant and flipped the unit over. In the right conditions moving the OPV to the highest point of the rig. Now when the unit settles to the floor again, the tanks are down and the lungs are up with the OPV in the highest position.
I don't have any information on how the unit was staged, but it is plausible for it to change position substantially with that much volume change.
Hans