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  1. #1
    Join Date
    Jul 2012
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    WIC summer charging

    So here's a scenario, walk up to a walk in cooler, found leak on low pressure switch, replace switch, now need to top off charge. 404A, with receiver, headmaster and liquid line sight glass. It's 70 above outside, gets to about -20 in the winter, how would you guys go about recharging and knowing you will have enough for winter operation?

  2. #2
    Join Date
    Nov 2006
    Location
    Wisconsin
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    Look up sporlan bulletin 90-30-1

  3. #3
    Join Date
    Aug 2002
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    Southold, NY
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    Quote Originally Posted by fordrules View Post
    Look up sporlan bulletin 90-30-1
    Normally i would agree but with Micro Channels that's tricky.

    Make and model of condensing unit or just look up the IOM.

  4. #4
    Join Date
    Apr 2003
    Location
    Maple Grove, MN
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    Block off the condenser with cardboard and try to simulate the pressures that you might see on the hottest day of the year. Then charge it up 'til the receiver is about 3/4 full, which you can figure out by running a torch up and down it a few times and then using the back of your hand to feel where the liquid level is.
    If at First You Don't Succeed, Skydiving Is Not for You.

  5. #5
    Join Date
    Jul 2000
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    Guayaquil, EC
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    Quote Originally Posted by pecmsg View Post
    Normally i would agree but with Micro Channels that's tricky.

    Make and model of condensing unit or just look up the IOM.
    I don't believe Heatcraft has info about charging their units with the microchannel "HyperCore" condenser coils. Here's the bulletin on that...from 9 years ago:

    https://icemeister.net/backroom/wp-c...s-H-HTS-QA.pdf

    If it's not a microchannel, use the Sporlan Bulletin 90-30-1 and follow the instructions of how to do the simple calculations for the proper charge:

    http://sporlanonline.com/literature/...0and%20LAC.pdf

  6. #6
    Join Date
    Aug 2002
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    Southold, NY
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    I have something on the outer at home.
    Normal 1 HP units took 2 or 3 extra #s
    Micro Channels a few OZs

    Youll know on a hot summer day when it cycles real fast on high head safety.

    Id prefer manual reset

  7. #7
    Join Date
    Jul 2012
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    Thread Starter
    I can understand that but it's not possible to know the liquid level in the receiver without it having a level glass.

  8. #8
    Join Date
    Apr 2003
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    Maple Grove, MN
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    Quote Originally Posted by mr05tundra View Post
    I can understand that but it's not possible to know the liquid level in the receiver without it having a level glass.
    "Not possible" is a pretty strong statement. Try re-reading my suggestion from post number 4.
    If at First You Don't Succeed, Skydiving Is Not for You.

  9. #9
    Join Date
    Jul 2012
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    Thread Starter
    Thanks ammoniadog, my reply was directed to someone else's suggestion but I see it just went in as a general reply. I like you suggestion and will have to try this. I might start off using a heat gun instead of a torch.

  10. #10
    Join Date
    Oct 2011
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    Quote Originally Posted by mr05tundra View Post
    Thanks ammoniadog, my reply was directed to someone else's suggestion but I see it just went in as a general reply. I like you suggestion and will have to try this. I might start off using a heat gun instead of a torch.
    Use a torch.
    Officially, Down for the count

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