I have a question, I started out doing residential/light commercial HVAC, and now for the past 6+ months have been doing Refrigeration . During my HVAC time I was always told to check Superheat with a fixed orifice and Subcooling with a TXV. I’m curious, because now doing refrigeration, almost always involving a TXV, I’ve always been told with check Superheat and to not even bother with Subcooling. Why is that?
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