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  1. #1
    Join Date
    Sep 2010
    Location
    San Diego
    Posts
    66

    Build up system with undersized condenser coil

    I have a one year old Frankenstein build up system with an undersized condenser coil. Does anyone know how I would possibly determine how many BTU's of additional condenser coil are required? And no, there is no make or model of the existing coils. All I can say is there are two 40 tons Copeland’s running with 404a.

  2. #2
    Join Date
    Apr 2007
    Location
    Pa
    Posts
    758
    how do you know the condenser is undersized?

  3. #3
    Join Date
    Feb 2010
    Location
    Cal
    Posts
    1,578
    US coil has a design cd they can mail to you. Toy around with it~ area, ckts, passes, fpi, and you should have a better handle on things.

    Gather you have ruled out assembly, direction and piping errors.

    No sub cooling?

  4. #4
    Join Date
    Sep 2010
    Location
    San Diego
    Posts
    66

    Undersized Condenser coil

    The sub-cooling is good under normal ambient conditions but it drops when the outdoor air temp gets around 100 deg. I'm going to check it for non-condensable tomorrow just to rule it out. The condenser coil is right next to the compressors but I'll give the piping a check up.

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