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  1. #1
    Join Date
    Jan 2012
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    WEST COLUMBIA S.C.
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    condenser air temp.

    On a 90 degree DAY,should the discharge air from condenser fan be 30 degrees above ambient temp.(120)Anything less would mean dirty outside coil? True or not.

  2. #2
    Join Date
    Jan 2010
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    North Huntingdon,Pa
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    In the ball park,depends on a lot of variables...
    PA#9377
    Your Satisfaction...Our Goal.

  3. #3
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    Sep 2008
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  4. #4
    Join Date
    Jan 2012
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    Quote Originally Posted by jpsmith1cm View Post
    Hewitt,

    Please start threads for tech questions in the tech-to-tech area.
    Sorry. Still getting use to site.Love it

  5. #5
    Join Date
    Feb 2012
    Location
    Alabama
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    Quote Originally Posted by hewitt View Post
    On a 90 degree DAY,should the discharge air from condenser fan be 30 degrees above ambient temp.(120)Anything less would mean dirty outside coil? True or not.
    The more dirty the coil is the higher the temperature will be. 20 degree rise is considered ideal.

  6. #6
    Join Date
    Jan 2001
    Location
    Nebraska
    Posts
    319
    Chart that I Use.


    SEER
    TD Range
    8
    30 35
    10
    25 30
    12
    20 25
    13>
    10 20

  7. #7
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    Jan 2012
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    Has anyone seen the last reply.Has someone ever used this.I never seen this scale

  8. #8
    Join Date
    Sep 2004
    Location
    Jersey
    Posts
    389
    the scale to me sound about right. this is going off what I normally get. I use my pressure to let me know if my coil is dirty
    Ride hard on a Harley!!

  9. #9
    Join Date
    Jul 2011
    Location
    East coast USA
    Posts
    1,000
    when it comes to knowing if condenser coils are dirty, other than sight. Is to go by how the unit is running, SH, DT, pressures. If the unit is running as designed based on the running specs. cleaning a coil will not make it run any better. but as a rule 10 to 20 Diff. is what i have used as a quick check

  10. #10
    Join Date
    Feb 2012
    Location
    Atlanta, Ga
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    20
    30* for r22 and 20* r410a?

  11. #11
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    Sep 2008
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  12. #12
    Join Date
    Feb 2012
    Location
    Atlanta, Ga
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    20
    Quote Originally Posted by jpsmith1cm View Post
    Refrigerant doesn't matter.
    you are right, I was thinking something else. Brain fart!

  13. #13
    Join Date
    May 2011
    Location
    Ripley, WV
    Posts
    1,336
    openclasspro mentioned variables in that equation, some of them include: if you are maintaining a 68-70 Room temperature the OD coil temperature will be lower than if you just came home and had the system off and it was 80 inside. Also low air flow (dirty coil, filter blocked return, blower running too slow) can cause the OD coil to bee cooler than expected.

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