Quote:
Originally Posted by pinballlooking
So a refrigerator compressor would work the best for this job.
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BEST is a strong word in this subject. There are a ton of "ifs" to consider.
IF you are trying to follow lawful, federally mandated professional procedures, none of the mentioned methods apply. Go buy a DOT 40 cylinder, a UL listed recovery machine, and approved hoses and fittings with shutoff and blowoff valves everywhere. Not to mention safe handling methods trainings and the EPA card you need to possess before accessing the refrigerant loop. In this approach, safety and protocol rule over economic concerns.
OTOH, if you are a "pirate hacker idiot", then the mentioned methods will work, but you assume all of the associated risk. For R12/R22/R134/R290 systems, a compressor/condenser/fan assembly from a common upright refrigerator works wonderfully:
Just chop the evaporator and cap tube loose, extract the entire condensing unit assembly, and install some flow controls and fittings. If you are a savvy hacker, you can use the included bullet strainer/drier to filter the gleaned liquid on its way into your recovery cylinder. A low pressure cutout can be rigged in place of the thermostat if desired.
Welcome to the dark side. Remember to keep to the code, arrr...
Somebody told me these things make a good space heater while not being used recovering refrigerant...