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  1. #1
    Join Date
    Mar 2008
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    624

    Recovery Cylinder Capacity

    What method are you guys using to determine the capacity of your recovery cylinders?
    HVAC PRO IN THE MAKING
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  2. #2
    Join Date
    Jun 2006
    Location
    New Jersey
    Posts
    4,340
    I have always used the stamped gross weight on the tank. Is that wrong?

  3. #3
    Join Date
    Mar 2008
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    624
    yep lol. thats part of it but theres a way of determining what percentage of the cylinder is fluid at certain temps etc so you dont go beyond 80% liquid in the thing.

    ive attached two pdf charts that i dug up from last year. theyre both different and i think one is out dated or something.
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    HVAC PRO IN THE MAKING
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  4. #4
    Join Date
    Dec 2006
    Location
    Northern VA
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    389
    I have always used the WC * .8 + TW = total weight when 80%.

  5. #5
    Join Date
    Sep 2005
    Location
    maui
    Posts
    389
    dont ya just fill it till it cant fit no more
    What cant be done correctly shouldn't be done at all

  6. #6
    Join Date
    Nov 2004
    Location
    South Carolina
    Posts
    1,840
    Quote Originally Posted by ryand View Post
    dont ya just fill it till it cant fit no more
    that's what i don't do lol

  7. #7
    Join Date
    Feb 2008
    Location
    Waffleville
    Posts
    10,339
    62lbs and 42lbs. max weight on the two sizes that i use. that's how i know. fill it till it is there or close to there.

    hey profiler, why you doing installation NATE's????

    if you do the service NATE's they'll give you the installation credits
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  8. #8
    Join Date
    Sep 2005
    Location
    Bay Area, CA
    Posts
    843
    Quote Originally Posted by EverettsHVAC View Post
    I have always used the WC * .8 + TW = total weight when 80%.
    If its r22 that's what I do, if its 410 I believe its 2/3's the wc weight. But I can be wrong on that I just remember 2/3 is the fill on a new tank. I'm sure someone will correct me if thats wrong.
    Global Warming or: None like it hot
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  9. #9
    Join Date
    Jul 2008
    Location
    Washington, DC
    Posts
    1,586

    Got this somewhere...

    Not sure where I found this formula but here it is.

    To convert to refrigerant capacity:
    Maximum allowable gross cylinder fill weight is 0.8 x water capacity x specific gravity of
    the refrigerant recovered @ 77F/25C + the cylinder tare weight.

  10. #10
    Join Date
    Mar 2008
    Posts
    624
    Quote Originally Posted by beachtech View Post
    62lbs and 42lbs. max weight on the two sizes that i use. that's how i know. fill it till it is there or close to there.

    hey profiler, why you doing installation NATE's????

    if you do the service NATE's they'll give you the installation credits

    You silly geese...ive only taken 2 exams plus core. What makes you think im actually taking the installation exams? I took the gas heat service and heat pump service. 21 certs total i believe including cores and ive knocked out 8 of em. I put service/ installation on my thingy cause ive got boph.
    Last edited by Profiler; 02-25-2009 at 08:22 PM.
    HVAC PRO IN THE MAKING
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  11. #11
    Join Date
    Jun 2004
    Location
    Location:Raleigh NC
    Posts
    9,642
    Quote Originally Posted by ryand View Post
    dont ya just fill it till it cant fit no more
    I do that then put it in the hot Van
    If you help others then you are a Success

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