Elvin, I remember the R-12 phase-out. Its known that propane can be interchanged in an r12 system. I have done it myself and it does work. Actually I used a mix of 25% isobutane and 75% propane.
I also found it was slightly more efficient, however I observed this thru reduced compressor loading. A pully size change would have matched temperature as good as r12 im sure. I only charged auto a/c systems.
As one may use propane based refrigerant, there is a decreased chance of the 'freon' based corrosives, which the dryer normally provides protections for when using r12. Also I saw a couple of refridgerators charged with the propane mix, the oil viscosity had to be reduced to accomodate the alternative freon. but all the systems I observed worked ok for a pretty long time(over 3 years)
But im pretty sure propane based freon is not allowed, because of the possibilite of a leak developing in such a system charged with that. But it does infact work, interesting that you know that.
I have never tried this with a system charged with 134a.
JW
[ Parent ]
