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  1. #1
    Join Date
    Sep 2002
    Location
    Virginia
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    installing Freeze Stat

    I didn't go for the expensive one with cap tube and sensor , I got the elcheapo you strap to suction line ( cheep cheep cheeeeeeeeep customer )

    Trane 6 ton gas pack

    Supco SFPC

    So how far from the evap do you strap this thing on the suction line ? Closer to evap or more towards the compressor ?

    It drops out at 35 deg , back in at 50

    I put it about 16 in from evap

    I also added a TDOM delay for 5 min

  2. #2
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    14,472
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    As close as possible.
    Inside the cabinet is best.

  3. #3
    Join Date
    Sep 2002
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    On the suction header of the evaporator might be the best but on the suction line just outside the plenum or coil-box has been successful for me many times.

    BTW: the time delay won't hurt but the 35 cut-out / 50 cut-in 'timing' is well sufficient to prevent short-cycling.

    PHM
    -------


    Quote Originally Posted by Snapperhead View Post
    I didn't go for the expensive one with cap tube and sensor , I got the elcheapo you strap to suction line ( cheep cheep cheeeeeeeeep customer )

    Trane 6 ton gas pack

    Supco SFPC

    So how far from the evap do you strap this thing on the suction line ? Closer to evap or more towards the compressor ?

    It drops out at 35 deg , back in at 50

    I put it about 16 in from evap

    I also added a TDOM delay for 5 min
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  4. #4
    Join Date
    May 2014
    Location
    Bay Area California
    Posts
    16,715
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    I would imagine that, ideally, you'd want it on a return bend. But often size and space restrictions can make that problematic.
    If you were a real tech, you'd solder a relay on that board and call it good to go.

  5. #5
    Join Date
    Sep 2002
    Posts
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    I guess that would work but the clip on them is for 5/8 to 7/8 tube size so you're kind of restricted for placement. And thinking back - maybe it's just 3/4 and 7/8.

    But really; the placement doesn't seem to be all that critical. I had one work well enough at the condensing unit. It was on an attic job that I Was Not Going into the attic for.

    Cut-out is 35. These jobs tend to have low SSH to start with - especially when the evap is in any danger of freezing - and the coil doesn't really "freeze" until about 30 suction.

    An EPR (or a new properly installed system <g>) works the best but so many jobs demand a lesser intervention and the Supco stats do work well for cheap.

    PHM
    --------




    c
    Quote Originally Posted by BBeerme View Post
    I would imagine that, ideally, you'd want it on a return bend. But often size and space restrictions can make that problematic.
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

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