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Originally Posted by redleader
Thanks for the input. Its good to know i'm probably being caustious about pressure, even if R134a is a much lower pressure refrigerant then the R290 I plan on using. I think i'll try it and see.
Also, the oil does travel through the whole system. Fire up your compressor while its detached from the system and it will shoot oil everywhere  |
Thanks for clearing up the oil travel mystery for me....makes sense,I suppose.
Fridge compressors are a new animal to me...i just tinker with auto AC , but always like to learn more.
R290 gives lower temps with the trade off of higher pressures ,correct?
We should brainstorm a bit on evap designs as I'm ready to make one....
Edit to add: I just bought 3 ea. copper -phosphorus brazing rods from Ho' Depot.
Tensile strength 40,000 psi , working temp 1310 f to 1475 f. Says on the pack "joins copper to copper without flux and copper to copper alloys (brass & bronze) This alloy is widely used in refrigeration,electrical and plumbing jobs to join copper tubing and pipe,electrical wires and flexible tubing. Excellent for soldering copper tubing connections even with water in the lines ".
I'll let you know how they work.