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  1. #1
    Join Date
    Jun 2001
    Location
    San Diego, CA
    Posts
    1,149
    I did a repair on a 134a reachin couple weeks ago.
    Dataplate charge was miniscule, like 11 ozs. It's not
    often I work on really small units so like a dummy I inverted the bottle and filled my hoses and manifold.
    There went 11 ozs. It was then I wondered just how am
    I gonna get exactly 11ozs into the system without wasting that much or more.

    What's a good way to do this?

  2. #2
    Join Date
    May 2004
    Posts
    20

    charging cylinders

    I have used charging cylinders to charge 4-6 oz in small systems. My old cylinders were calibrated for r12 and 22 so I had to recalibrate them for 134 and other gases using a digital scale.

  3. #3
    Join Date
    Jan 2004
    Location
    Earth
    Posts
    4,879
    I would like to see your manifold. If it holds 11 ounces you must have 20 foot hoses on that thing.
    A Diamond is just a piece of coal, that made good under pressure!

  4. #4
    Join Date
    Jul 2000
    Location
    Guayaquil EC
    Posts
    10,421
    Since you are working with R134A you can vapor charge the system and the amount of refrigerant left in the hoses is negligible even on small systems like this.

    Dial-a-Charge? I haven't seen one of those in twenty years! I've been using an electronic flat scale that's good to .5 oz and after nearly 15 years it still works well (unless I get it wet)

    For liquid charging small systems, just get your charging hose up to tank pressure with the tank upright, invert the tank and zero out your scale. When you get to the required weight, close off at the tank.

  5. #5
    Originally posted by icemeister
    Since you are working with R134A you can vapor charge the system and the amount of refrigerant left in the hoses is negligible even on small systems like this.

    For liquid charging small systems, just get your charging hose up to tank pressure with the tank upright, invert the tank and zero out your scale. When you get to the required weight, close off at the tank.
    Go with what he jus said.

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