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  1. #1
    Join Date
    Jul 2016
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    CA, USA
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    407 2 ton question

    72 low 46 temp .5 SH. 253 high 97 temp 11.4 SC ODDB 95.5
    supply 61 return 77 wb 66 RH 51%
    GAW14L24 407c
    Is that operating like it should for those temps? It took apartment 1 hr 15min to cool 80 down to 76. SH was .5- 2 whole time i was charging. Charged according to specs on panel. How much affect will having improper sized suction line. This unit wants 3/4 i only have 5/8.

  2. #2
    Join Date
    Aug 2014
    Location
    Central MO.
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    What do you think it is?

    Sent from my LGLS990 using Tapatalk

  3. #3
    Join Date
    Aug 2001
    Location
    Mechanicsville, Virginia
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    2,023
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    Quote Originally Posted by Shaunp45 View Post
    72 low 46 temp .5 SH. 253 high 97 temp 11.4 SC ODDB 95.5
    supply 61 return 77 wb 66 RH 51%
    GAW14L24 407c
    Is that operating like it should for those temps? It took apartment 1 hr 15min to cool 80 down to 76. SH was .5- 2 whole time i was charging. Charged according to specs on panel. How much affect will having improper sized suction line. This unit wants 3/4 i only have 5/8.
    Something is amiss with the numbers you posted. A 97* condenser with 11.4* subcooling gives you an 85.6* liquid line. You cannot have a liquid line that is colder than the outdoor temperature (95.5) without a restriction causing a pressure/temperature drop. Other causes could be the liquid line being cooled by water dripping on it or still wet from a recent cleaning.

    I plugged your data into my analyzer. The refrigerant 407 doesn't matter if using saturation temperatures.

    Use this link to check your linrset size: http://efficientcomfort.net/asp/LineSetCalc_Web/LineSetCalc_Web.asp
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  4. #4
    Join Date
    Jul 2016
    Location
    CA, USA
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    Quote Originally Posted by penderway View Post
    Something is amiss with the numbers you posted. A 97* condenser with 11.4* subcooling gives you an 85.6* liquid line. You cannot have a liquid line that is colder than the outdoor temperature (95.5) without a restriction causing a pressure/temperature drop. Other causes could be the liquid line being cooled by water dripping on it or still wet from a recent cleaning.

    I plugged your data into my analyzer. The refrigerant 407 doesn't matter if using saturation temperatures.

    Use this link to check your linrset size: http://efficientcomfort.net/asp/LineSetCalc_Web/LineSetCalc_Web.asp
    Thank vary much for your info. its vary helpful. I will go back and check around again for temp drop near meter or maybe after it. This unit is vary confusing to me.

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