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Thread: superheat

  1. #1
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    May 2004
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    ok how do you find out what the proper superheat should be.
    senerio outside temp 86 indoor wet bulb 58 indoor dry bulb 72.

  2. #2
    Senior Tech Guest
    Go to the "For your interest" section. Read up on superheat and subcool and then come back with your questions.

  3. #3
    Join Date
    Dec 2002
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    Houston,Tx.
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    Originally posted by 25skeet
    ok how do you find out what the proper superheat should be.
    senerio outside temp 86 indoor wet bulb 58 indoor dry bulb 72.
    What? I will save this one for Norm.
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  4. #4
    Join Date
    Dec 2002
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    go to...

    ...the supply house and buy a slide rule calculator...Trane makes a good one

  5. #5
    Join Date
    May 2004
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    slide rule calc

    none of the supply houses here in great falls mt have them i have been trying to find one online but cant. Can I get one direct from trane?

  6. #6
    Join Date
    Apr 2003
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    Check the equipment spec sheets... they will give you a chart for the different types of metering devices.

    Some will even go further with SP, LP, Amps, SH, SC, etc, etc...

  7. #7
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    Apr 2004
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    Hmm

    There is a guy on ebay that sells Carrier charts for like 15 bucks. I have a SH-31 and never using it.Its good for P/M work. Or as a learning tool, But you cant beat a good thermometer and a Temp Clamp. I carry a Fieldpiece thermometer and a Fluke line clamp in my tool bag fits nicey nice in bag. If you got a Fluke 16 they work well for line temps as well.

    [Edited by fitter638nyc on 06-23-2005 at 03:36 AM]
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  8. #8
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    Jan 2004
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    Originally posted by 25skeet
    ok how do you find out what the proper superheat should be.
    senerio outside temp 86 indoor wet bulb 58 indoor dry bulb 72.
    58 x 3 = 174

    174 - 80 = 94

    94 - 86 = 14

    14 / 2 = 7

    7° super heat for your senario.
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  9. #9
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    Re: slide rule calc

    Originally posted by 25skeet
    none of the supply houses here in great falls mt have them i have been trying to find one online but cant. Can I get one direct from trane?
    Yes, you can order them directly from Trane or Carrier, but there is a minimum order of $25 plus shipping & tax. It gets rather expensive for just one.

    Here's a source with a minimum order of $10, but you can meet that by buying an R-22 slide-chart and an R-410A slide-chart, plus shipping of course.

    http://www.123supply.com/clearspec.html

    If you just want a simple chart that uses indoor WB and outdoor DB then look here:

    http://www.rhvactools.com/
    and click on "A/C supherheat card"


  10. #10
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    Sep 2002
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    I see you are in Great Falls. Go to the Johnstone Supply there and ask them for one. They are a Coleman supplier and Coleman has such a slide rule. I have several.

    Coleman has them for both R22 and 410A.

    Norm


  11. #11
    Join Date
    May 2004
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    Great thanks I will get one from johnstone.

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