Morphing Air Conditioner into Autocascade System

[n00b 0f l337]

Again, amazing advice. You are an incredible help to this community mytek. I'm going to pickup one of these ac's as the condenser setup is exactly what size I've been wanting, and the rotarys already placed perfectly. I do not have r23 just yet, but I'm also going to get a quote as I think its nearly the perfect autoc gas from most reading. I'll probably turn this ac into a chiller with a 16plate hx, but in the future I'm going to try what you have built, with our style evaporator and flexible line, and also use my lever arm pipe bender to make a tighter almost plateHX sized heat exchanger. I have one last question, do you use a pour-then-expand insulation foam, or a spray foam?

[mytekcontrols]

I have one last question, do you use a pour-then-expand insulation foam, or a spray foam?

Once again I am lucky to work for a service and repair facility, since they have a very nice spray foam machine that I can use.

[mytekcontrols]

Here is another picture of my Cold Trap machine giving you a more "bird's eye" view of the compressor, air-cooled condenser, fan, and the modifications I made (bullet style liquid line dryer, suction and discharge access fittings). This also shows the corrected position of the suction access fitting, which fixed a small boo boo I made on the initial build (I accidentally had it pointing towards the front which you can see is occupied by the electrical box).

As part of the modifications, it is also necessary to cut the rear motor shaft and remove both the evaporator fan and evap (these were originally inside the Styrofoam box). Actually the evap is another bonus which could be used as an air-cooled condenser for some other project.

[mytekcontrols]

Ah, do you know the foam density? Great Stuff isn't very good, so I'm purchasing some two part pour 8lb density foam.

We use a MIL-SPEC foam which I don't recall the density of (I can try to find out). Yes Great Stuff is not a good substitute (whatever happened to the real polyurethane in a can?).

do you think r11, r290, r23, r1150 might be a plausible creation?

Yes, very plausible. R290 instead of R22 I presume. The R1150 should do nicely to get you to -100C although R14 would be even better (understandably more expensive and harder to get in small quantities).

[colder2016]

great