Reply to "Charging new AC system"

larrywMember

Thanks George. Got it.

Bill, Since my car has been fitted with an R12 rotary pump and the charging equipment I have access to is also all R12 stuff, I'm going to stick with that.
I have over a dozen NOS cans of freon on hand, and it's still easy to find on Ebay. Summit still sells bottles of the proper oil for the R12 compressors too.
With 40 year old hoses my system has held it's charge for at least five years now, still blows cold. Even the iffy hose I described earlier doesn't actually leak (yet).
I did install a binary switch at the receiver dryer, it's wired in series with the compressor relay pilot circuit. If the system is over or under proper operating pressures the compressor won't engage.
Next time I empty the system I'm going to swap the binary switch for a trinary switch and use the third wire to control the condensor fan relay.

12/4/145:44 AM

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