Refrigerator:
Skip, Line coming out of BD50 compressor’s side is high pressure
line, in warm seawater it would be the one that gets the hottest and
may be why O ring failed in it. Hopefully compressor was not
overheated as well. When failed O ring was removed I hope all pieces
were accounted for. As you know your system has no filter or screen
protecting expansion capillary tube inlet orifice in high pressure
liquid side of system.
Yes, the single service connection on top of compressor is where
vacuum dehydration pump and recharge with 134a is accomplished. Rube
Goldberg would give you an A+ for trying to complicate a simple
process. Only time will tell if you dehydrated deep and long enough to
be successful. On your system successful performance can only be when
refrigerant volume and keel cooler condenser cooling are in balance as
seawater temperatures and compressor speeds change.