Added by on 2016-06-21

I show how to connect and purge hoses when recovering refrigerant from an a/c system. Please do not be confused by the R-410A gauges. My R-22 gauges were broken and I was forced to use my R-410A gauges. Attention: Do not try any of what you see in this video at home. It takes at least two years of HVACR schooling to become qualified to learn in the field how to work on heating and air conditioning equipment. Then it takes another three years of apprenticeship training to become competent enough to safely work on heating and air conditioning equipment. Video Rating: / 5 Related PostsGreenGuard Roofing Recovery BoardOzone layer ‘shows signs of recovery’ – BBC NewsLED’s, HVAC, & Breakthrough Innovations | Let’s Talk Indoor Farming!Citywide HVAC Repair at Hellman’s Mayonnaise Plant ChicagoGarden Hose VS Car Fire Part 2Schedule 40 PVC, Male Garden Hose x 1″ Insert

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  • DrZarkloff 1 year ago

    I have an sman4 but I don't use it for recovering gas.

  • James Hoschek 1 year ago

    I hope that by now you are using the field piece sman and do away with all the other equipment. Do you use a filter on your hoses….. Good video but I am sure your upgraded by now.

  • Josue Rios 1 year ago

    hi rand

  • r s c-household 1 year ago

    if r22 is recovered from a leaking system without fixing the leak and vacuuming the line, what would remain in the line? Thanks

  • Winston Lee 1 year ago

    Can the recovery machine be re-charge the recoverd refrigerants back to the unit? And how ?

  • Winston Lee 1 year ago

    What do you use to charge the used R22 freon back into the unit ?

  • winston lee 1 year ago

    The used r22 freon took out from the unit ,can be charged them back in?

  • Richard Recupero 1 year ago

    i came here to read hater comments

  • Sydney Gourley 1 year ago

    were you greyfurnanceman?

  • Kevin O. McCann 1 year ago

    I don't like the hoses that have check valve in the end. I like the kind with ball valves attached. 

  • Kevin O. McCann 1 year ago

    If you wanted to recharge the gas that you had recovered; how do you account for the gas that is left in the recovery machine?

  • Dave RT 1 year ago

    Can you get your EPA online?

  • johnmiller102 1 year ago

    Hi Dr. Z.  I wanted to ask you when you are evacuating a system and you get below 500 microns is it necessary to turn off the pump and isolate the system to see if you get a rise in microns?  I usually pull the vacuum below 500 microns and let it sit for about 5-10 minutes to see if the reading goes up. Is this necessary or am I just wasting my time?

  • sacoolman 1 year ago

    In Europe we are not allowed to purge any gas to the atmosphere.Before opening guages to sistem we have to vacuum all lines.

  • Bart Curry 1 year ago

    Would be easier to purge last hose at the tank while it is loosely threaded on. tighten hose while purging then open tank.  When you purged and stopped with an open end hose you allowed air back in the hose.

  • kippercat123 1 year ago

    If you recover air along with Freon into your recovery tank, can the air be released back out of the tank without releasing Freon… say after its been sitting a day or more ?

  • MontiR Aruba 1 year ago

    An RV A/C roof unit that uses R22, can it be converted to run R134A after a complete vacuum?

  • Rafie sediqi 1 year ago

    Hi dear, my question is if there's not any label on my unit to red about freon how do I know what kind of freon it is in my unit ? 

  • adam mickiewicz 1 year ago

    what are the negative numbers on the top row on the scale display? lbs?

  • DrZarkloff 1 year ago

    Only if you're planning to open the system for repairs.