Should be a simple question. I have the expedition blocks on my o2ptima. The O2 side is simple enough, and if I need to go to offboard O2 I have to disconnect the O2 hose and swivel it down to plug off board.
The Dil side however is just an empty swivel block. If I hook up off board gas and shutoff the ADV, do I need to unhook the onboard dil hose to ensure I'm on offboard dil?
I tried just hooking it up and doing a dil flush, but the Ppo2 dropped to what I would have expected for the air dil , vice the 32% I had plugged from off board.
The Dil side however is just an empty swivel block. If I hook up off board gas and shutoff the ADV, do I need to unhook the onboard dil hose to ensure I'm on offboard dil?
I tried just hooking it up and doing a dil flush, but the Ppo2 dropped to what I would have expected for the air dil , vice the 32% I had plugged from off board.