Morphing Air Conditioner into Autocascade System

[mytekcontrols]

Good point Walt. But Polycold has access to refrigerants that I simply don't.

Polycold charge as stated in their patent:
R236fa, R125, R23, R14, Argon (EDIT: forgot to list the R23)

Requires POE oil, and extremely good oil separators (Polycold had some gigantic ones custom made to their specs).

EDIT: BTW; I no longer work for Polycold, and this project was not an attempt to make what they have made, it was simply meant to serve as a tutorial on autocascades (which I think it has done quite well).