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This was a great thread until a few came in and shit all over it. Many golden nuggets of information were shared, and this can be a great reference for all those with pipe dreams or real business aspirations of running such a facility. Can a mod please delete all these useless argumentative...

That sounds possible, but I'm not sure. They way I would do it was with a machine that recovers the freon in the lines and gauges after the system has been charged the proper amount. If the compressor is running, with the low side hooked up, in an automotive system it will pull down to about...

I'm not a HVAC technician, but I've done lots of work in automotive related a/c, which is R-134, which is just a different flavour, really. The pressure/temperature relationship is the main difference between the them. 1. How do I determine whether I lost enough Freon that I need to add some...