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  1. HVAC
    I'm about to recover my car's R134A system for repairs. I have a tank of R134A with a little bit of refrigerant still inside (see pics below). The tank's gross weight is about 14 lbs. I have no idea what its tare weight is though. Can I attach my recovery machine to the car, and evac the...
    r134a recovery refrigerant
  2. HVAC
    I am just a hobbyist and do automotive as well as home A/C. I am considering purchasing a refrigerant recovery machine and have a few questions: Is it safe to use the same recovery machine for both R134 (auto) and R410 (home)? Piggybacking #1, If I do a line purge when swapping from one...
    hvac r134a r410a recovery
  3. HVAC
    What do numbers 1-8 represent?
    freon how to read gauge r134a
  4. HVAC
    Can anyone tell me what the superheat target calculation would be for a freezer? I recently had to add some R134a to my freezer and I need to know what my target superheat should be. I know that the formula for a typical HVAC is [(3*return wet bulb temp)-outdoor dry bulb temp-80]/2. But will...
    freezer r134a superheat superheat formula
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