Just bought a 77' Edson Buffalo camper trailer (17' - 1700 lbs) and am very new to RVing... How does the fridge work? I found a panel outside the camper that reveals the back of the fridge; there is a copper line with a ball valve, then a manifold with a red button, then what appears to be a port where matches had been inserted. What do I do, look for, set it at, shut it down, etc.? Can I run this on my A/C supply? Any help is appreciated... P.S. Had a near death experience while towing and passing a semi... MAJOR SWAY! Whats up?