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  1. #1
    Join Date
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    American Standard

    Anyone familiar with this Am. Std. system?

    Air Handler:
    M- TAM7A0C36H31SDB
    S- 14313M64AV

    Heat pump with the blower before the coil. Push through, not pull through. Not sure how that could work.

    Do they run different? Like pressures/temperatures?

    Got one that is not putting out the required air flow. Currently about 800 cfm for a 3 ton system.
    Ran fine for the last 4 years and now there is a no cooling call.
    Delta T is 25 with floor supply and floor returns.

    I will be calling tech support tomorrow, but trying to get may head around this thing.
    Can someone please explain to me -
    Why is there never enough time to do it right the first time, but plenty of time to do it twice?


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  2. #2
    Join Date
    Jan 2016
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    Cooling CFM is lower than Heating CFM, I believe the Cooling CFM is 350/ton. If there is no call for cooling the fan will run at a lower CFM. The Y terminal has to have 24v.

  3. #3
    Join Date
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    This post is kinda short on your troubleshooting specifics.

    Do you have the Service Facts to verify dip switch settings?

    Have you checked the total external static pressure?

    Is the blower wheel and AC coil clean?
    Instead of learning the tricks of the trade, learn the trade.

  4. #4
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    Thread Starter
    Quote Originally Posted by rundawg View Post
    This post is kinda short on your troubleshooting specifics.

    Do you have the Service Facts to verify dip switch settings?

    Have you checked the total external static pressure?

    Is the blower wheel and AC coil clean?
    Sorry for the lack of info. I have the service facts and the troubleshoot info. I was just trying to get my head around the blower before the coil and wondered if ther was anything different.

    Seems the 3 boards control this whole system. Never ran into this system before.
    Can someone please explain to me -
    Why is there never enough time to do it right the first time, but plenty of time to do it twice?


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  5. #5
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    Quote Originally Posted by joemach View Post
    Sorry for the lack of info. I have the service facts and the troubleshoot info. I was just trying to get my head around the blower before the coil and wondered if ther was anything different.
    The couple of these units that I have come across have not had issues with refrigerant pressures or airflow that was directly related to the way the unit was set up.

    With that said, maybe a Trane guy that sees these units all the time, might have a different perspective.
    Instead of learning the tricks of the trade, learn the trade.

  6. #6
    Join Date
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    No different than a gas furnace with the coil on top. Any red lights? I love the Tam7 and Tam9, imho best ah on the market for 8 years now.

  7. #7
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    Thread Starter
    Quote Originally Posted by ksefan View Post
    No different than a gas furnace with the coil on top. Any red lights? I love the Tam7 and Tam9, imho best ah on the market for 8 years now.
    Customer said he say red lights. When I got there no red lights.

    Spend some time last night studying Service Facts on this thing. Customer did not have a copy. Got to know the diagnostic codes somewhat and when I go back with bring service facts with me and go through the step by step.

    Question: What about them makes them the best air handler on the market?

    Seems like a pain to diagnose. Probably not too bad once you see a few.
    Can someone please explain to me -
    Why is there never enough time to do it right the first time, but plenty of time to do it twice?


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  8. #8
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    I believe if you power the unit off and back on the fault light will flash the last faults.

  9. #9
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    Thread Starter
    Quote Originally Posted by savoy05 View Post
    I believe if you power the unit off and back on the fault light will flash the last faults.
    Did power off and back on, but no red lights.
    Can someone please explain to me -
    Why is there never enough time to do it right the first time, but plenty of time to do it twice?


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  10. #10
    Join Date
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    Check the service facts it should show how to retrieve the faults. In my download copy it was on page 8

  11. #11
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    I like the cabinet design, separates for ease of getting it up the ladder access in attics, no loose insulation inside makes it easier to clean. I like the eev design, built in frost protection, available float switch for the drain pan. They are multi directional, well insulated, and the heat packs are easy to remove.

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