Looking to convert a Bitzer screw chiller from 22 to 407c but don't think it's as easy as just changing oil dropping in a new gas. I ve never done a conversion on this scale and have to assume controls wont jive w/o updating. Namely the eevs, discharge gas thermostatic valve and fan cycling controls. Has anyone done this kinds conversion and what were the obstacle you needed to overcome to make it work. Looking at pt chart 407c and r-22 are close in some regards but not in others. Any thoughts?
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