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  1. #1
    Join Date
    Dec 2006
    Location
    new england
    Posts
    611

    older carrier ahu capacity

    Having airflow issues with this unit.
    m/n-39ba110a10
    s/n-67060694
    Chilled and hot water coils. Coils and filters are clean. All dampers are open but church isn't maintaining temp when occupied. Any info on unit would be appreciated. I have our balancer heading out to take readings this week. TIA Fitz

  2. #2
    Join Date
    Jul 2011
    Location
    East coast USA
    Posts
    955
    has it ever worked? were there and changes since? what is the CW temps, the DT across the coils. Is it air flow or temp. To very different things.

    you could have flow issues, pumps issues, air etc... did you rule all this out.

  3. #3
    Join Date
    Aug 2009
    Location
    Prattville, Alabama
    Posts
    1,979
    Yeah, it sounds as if so far most of the attention has been given to the air side. Don't forget about about the water side.

  4. #4
    Join Date
    May 2012
    Location
    San Diego, CA
    Posts
    352
    Is there air flow (does the fan turn on?). Does the coils get the CHW and HHW?

  5. #5
    Join Date
    Feb 2011
    Location
    Chesterfield, Virginia, USA
    Posts
    84
    All "39 Series" Carrier air handlers are purpose built so you will have to call Carrier( and hope you get someone that even knows what they are) to decipher its numbers. It appears to be built in the sixties.

    What is the Delta T through the chilled water coils when running? Also how much fresh air are you pulling?

  6. #6
    Join Date
    Dec 2006
    Location
    new england
    Posts
    611
    I'll have more readings for you guys when I return next week. Thanks for the replies. Fitz

  7. #7
    Join Date
    Jul 2011
    Location
    East coast USA
    Posts
    955
    Quote Originally Posted by fitzyfitta View Post
    I'll have more readings for you guys when I return next week. Thanks for the replies. Fitz
    http://www.docs.hvacpartners.com/idc...9b,39c-1xa.pdf

    i think this is your unit.

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