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Thread: coil stats ?

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  1. #1
    Join Date
    Mar 2006
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    1,042

    coil stats ?

    working on turbo air reach in cooler. unit had two issues, one was a leak which i fixed.. While testing the unit, i found it would pull down to around 25 degrees and wouldn't satisfy..

    so i put a new stat on it, i dont like coil stats and would much rather have a air stat, but i doos as i told, it was a ranco a21 i think, but dont quote me on that, it was still doing the same thing.

    i had to get out of there as it was getting really busy, last temp i had was 26 and still running.
    You can't kiss death without it kissing you back. Death is a passionate kisser.


  2. #2
    Join Date
    Dec 2003
    Location
    chicago,il
    Posts
    97
    i use a ranco a12-1560 used them for years no problems

  3. #3
    Join Date
    Mar 2006
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    1,042
    Quote Originally Posted by gmfridg View Post
    i use a ranco a12-1560 used them for years no problems
    thats what it was
    You can't kiss death without it kissing you back. Death is a passionate kisser.


  4. #4
    Join Date
    Jul 2000
    Location
    Guayaquil EC
    Posts
    10,460
    Did you have the control's cap tube inserted in the coil properly with the recommended 6" into the coil? What setting did you have the control set at?

    The A12-1560 has a mid-range or "normal off" of about 24ΊF, which would be around #4 or #5 on the dial. Remember, the higher the number, the colder the cut-out temp.

    Here's an old thread on constant cut-in controls:

    http://hvac-talk.com/vbb/showthread.php?t=108790

  5. #5
    Join Date
    Jan 2004
    Posts
    30
    I realize this is an old thread, but its one of the more informative on the subject. Where in the coil would be most preferable for the bulb of the cut in control. And also, with the other differences you mentioned, the physical characteristics of the control like Cap tube length and design. Some are coiled as others are just straight cap tube.

  6. #6
    Join Date
    Aug 2010
    Posts
    3,508
    Quote Originally Posted by iceburg View Post
    I realize this is an old thread, but its one of the more informative on the subject. Where in the coil would be most preferable for the bulb of the cut in control. And also, with the other differences you mentioned, the physical characteristics of the control like Cap tube length and design. Some are coiled as others are just straight cap tube.
    As determined by design engineer. Unit is designed to operate as intended only when the correct cold control is installed in the location chosen by the designer. Cold controls are an indirect means of control, so the box will behave unpredictably when you start messing with the location or type of bulb.

  7. #7
    Join Date
    Sep 2002
    Location
    Virginia
    Posts
    3,304
    I thread the cap tube thru the coils a few times, probly have couple feet wrapped.

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