Morphing Air Conditioner into Autocascade System

[mytekcontrols]

Hi Moc thanks for joining the discussion

As for your autocascade: it's not the fault of your phase separator that is causing the problem, but the lack of a HXC before it (Aux Condenser). Coming in at room temperature is the limiting factor for good separation. If you put another plate HXC before it (exchanging with the suction return from the existing cascade plate HXC), you should see somewhere around -30C at the phase separator. Give it a try and let me know what happens.

mytekcontrols: so the r22 and r123 they are mixing and create a ''new freon'' kind off .why not use just 1 r*** like lets say r134?

If I could get R-114 (boiling point = 3.6C), then this would be what I'd substitute for the R-123/R-22 mix. However I don't believe there is a good alternative available, at least not in a freon. R-134A might work, although it does boil off at a colder temp, and probably wont work as well as either R-123 or R-114 in transferring heat at the air cooled condenser.

Edit: HFC R236fa is a good replacement for R114, although it will necessitate the use of POE oil in the system.

is it ok to use 0,7mm(0,028''?) cap lines?

Well it all depends on what displacement of compressor you intend to use, and what flow rates you need. Go back a few posts in this thread and you'll see a chart and a discussion on captube sizing.