Mixing refrigerants? (let the flames begin)
Ok guys and gals... I KNOW it ain't right or what's taught or what they say ain't comtatible (so they say) HOWEVER!
I have come across units that have been marked by passed tech's "R-12/134A/409/hotshot.mix. And are working fine after I repaired a small leak and partially recharged with what I had on hand (134a).
I've also used R22 instead of 404a to get a WI freezer running after fixing a leak, havn't had to go back in 6 months and used 3lbs on a 8lb system.
The equipment,refrigerant,oil and other manufacturers adamantly proclaim that they WON'T mix but they will.
Now before you get your panties in a bunch! I don't do this all the time as a general practice, but only in a pinch. If the system pulls down to temp. then I leave it at that.
you can get as technical as you want but, R12,134a,409,hotshot,and a few others ALL have REALY close head pressure.. and the bottom line is protecting the compressor. R 502,404a,r22...ect are the same.
NO they are not intercomtatible with P.O.E. oil and Mineral oil. I know this but if it's a mix then as long as the majority is oil compatible it will work. Reduce performance and life???? maybe.
My proof I recently came across a 1 door upright freezer that was to be scrapped,marked 404a, The comp. worked so I fixed the evap. leaks and weighed in the 16 oz charge of as equal parts I could of 134a,404a,22,409a.
and also some recovered witches brew
Well it reached -10 F in 45 min. from 80 F.
Hmm?
Now let the beatings begin. (no I didn't make this up to provoke you guys...)
We the willing, led by the unknowing, for the ungratefull, have done so much for so long with so little, we are now qualified to do anything with nothing.
Refrigeration is all the same weather your making Ice, refrigerating or freezing the product.