[FittedBuckle]

Hi everyone. I'm working on my 1983 Newell. Heating is done and now I'm moving onto the AC. This is a 40' RV with 3 mini air conditioners, one in front, one under the kitchen table, and one in the rear closet. Back one works, but the middle two need work. They dont seem to have any data plates but are rated 1-1.5 ton according to my father who is a HVAC guy. Split system. Capillary tube's. We're trying to find out what type of refrigerant these systems would have used without having to purchase an analyzer. Any help would be greatly appreciated.

[Richard]

I cannot say with certainty, but sounds like Dometic systems of that era. Most likely R22.

[johnkosir]

I would check pressures and temperatures  on the one that is working look at a pt chart and you should be able to tell what gas is in there

[FittedBuckle]

We ended up pulling pressure and concluded it was likely r22. Thanks for the help everyone.

[[email protected]]

I was going to say how about some pictures of the a/c controls inside or pictures of the A/C units? That could be a clue as to what your units are.

[Guy]

Our 1084 has 3 Dometic units. I have struggled over the years to keeps them running. I tried to replace any relays. timers, blower motors and capacitors when we had things torn up during service.