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Thread: low temp drop

  1. 10-10-2012, 10:44 PM #1
    chr358
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    low temp drop

    was introduced to my new problem today. brand new unit. 2 cicuits. #1 15 degree SH and 12degree SC. #2 24degree SH and 21 degree SC. Only 10 degrees across coil. I would think #1 is OK but #2 having both high SH and SC has got me puzzled. Unit is for a gas station with a little food area. There is a hood exhaust and make up which appear to be ok. Unit never gets to set pt
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  2. 10-10-2012, 10:57 PM #2
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    jtrammel
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    Restriction?
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  3. 10-10-2012, 11:02 PM #3
    hands
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    Sounds like ckt 2 has a restriction, look for a temp drop on the liquid line. Check the filter drier and condenser. Does it have a TXV or fixed orifices?
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  4. 10-10-2012, 11:03 PM #4
    chr358
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    fixed orifice
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  5. 10-10-2012, 11:05 PM #5
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    socotech
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    What are the pressures?
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  6. 10-10-2012, 11:07 PM #6
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    jtrammel
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    Could have installed the wrong size piston in that circuit
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  7. 10-10-2012, 11:08 PM #7
    chr358
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    I honestly didnt check for a restriction but havin a hard time thinkin it would cause High SH and SC
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  8. 10-10-2012, 11:11 PM #8
    chr358
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    #1 135/355
    #2 125/385


    410 freon
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  9. 10-10-2012, 11:13 PM #9
    chr358
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    47degree suction temp 95 degree liquid on circuit#1

    43degree suction and 91 degreeliquid #2
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  10. 10-10-2012, 11:20 PM #10
    chr358
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    could be a restriction. now that im looking at the numbers
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  11. 10-11-2012, 06:52 AM #11
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    socotech
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    Could it be overcharged?
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  12. 10-11-2012, 06:53 AM #12
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    socotech
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    If this is a package unit, I would weigh the charge.
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