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Thread: Superheat

  1. #1
    Join Date
    Jul 2004
    Location
    Western NY
    Posts
    2

    Post

    Somewhere in the far reaches of my overloaded mind I used to remember what superheat settings to look for on freezers, coolers, AC units....anyone help me to recover my memory?! For some reason 7 to 10 deg on AC and coolers rings a bell...is the bell ringing right?

  2. #2
    Join Date
    Jun 2004
    Location
    Long Island, NY
    Posts
    37
    Superheat is factory set at approx 10F(spring tension) and the TXV/TEV should work properly if no field adj have been made. If you want to check superheat try this.
    Example R-12 walk in box. Gauges read 37# = 40F evap. place an accurate thermmonter near the feeler bulb. Let say it reads 50F....
    +50F
    -40F
    ----
    =10F superheat.

    Note: Tech's in the field that change the factory set superheat settings just create more problems for himself or the next tech.

  3. #3
    Join Date
    Feb 2004
    Location
    Medford Oregon
    Posts
    807
    for many years the common Superheat rule has been
    high temp 8 to 12
    med temp 5 to 8
    low temp 2 to 5
    this is probably what you are refering to and is
    highlighted in Copeland's COSS seminars

    these are safe but if possible, get equip mfrs recommendation

  4. #4
    Join Date
    Jul 2004
    Location
    Western NY
    Posts
    2

    Cool

    Thanks guys, that brings back my memory, it hasn't gone completely....I knew I was in the ballpark

  5. #5
    Originally posted by rocket
    for many years the common Superheat rule has been
    high temp 8 to 12
    med temp 5 to 8
    low temp 2 to 5
    this is probably what you are refering to and is
    highlighted in Copeland's COSS seminars

    these are safe but if possible, get equip mfrs recommendation
    addition: 3 to 6 low temp cap tube
    20* A/C

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