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  1. #27
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,366
    Merged your 2 threads. please don't make duplicate threads, thank you.
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    How many times must one fix something before it is fixed?

  2. #28
    Join Date
    Jan 2013
    Posts
    19
    My intentions werent to get a diagnosis. It was simply to discuss the 18 SEER 2 stage system & see if this was "normal". (& get my post count up) Could someone else chime in on the liquid entering the bottom & vapor leaving the top? Thats what all of my text books show & both of my college teachers.

  3. #29
    Join Date
    Feb 2010
    Location
    In a boiler room
    Posts
    7,162
    Quote Originally Posted by JMack13 View Post
    My intentions werent to get a diagnosis. It was simply to discuss the 18 SEER 2 stage system & see if this was "normal". (& get my post count up) Could someone else chime in on the liquid entering the bottom & vapor leaving the top? Thats what all of my text books show & both of my college teachers.
    There are 7 circuits on a 3 ton (may be more on 4 and 5 ton models, haven't counted) and they are evenly spaced top to bottom. So the part that's freezing could be one or two circuits.

    If you open the side panel pull that black plastic sheet out of the way, you can see the vapor manifold and see exactly how the coil is piped.

    I have this unit in my house, the water source version.

  4. #30
    Join Date
    Jun 2004
    Location
    Eugene, Oregon
    Posts
    1,018
    It could have several distribution tubes distributing the refrigerant to the different circuits in the outdoor coil. The top one is probably restricted.
    "The bitterness of poor quality remains long after the sweetness of low price is forgotten". --Benjamin Franklin
    "Don't argue with an idiot, they will drag you down to their level and beat you with experience". --Mark Twain
    http://www.campbellmechanical.com

  5. #31
    Join Date
    Apr 2007
    Location
    Saint Augustine, Florida, United States
    Posts
    1,156
    run it in ac for a couple hours, the heat will melt the ice. just kidding. it is 75 down here right now.

  6. #32
    Join Date
    Oct 2010
    Location
    Anderson, South Carolina, United States
    Posts
    7,528
    Sounds like a restricted distributer tube like air1 said.

  7. #33
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,366
    Quote Originally Posted by JMack13 View Post
    My intentions werent to get a diagnosis. It was simply to discuss the 18 SEER 2 stage system & see if this was "normal". (& get my post count up) Could someone else chime in on the liquid entering the bottom & vapor leaving the top? Thats what all of my text books show & both of my college teachers.
    Often text books will show an over simplified example/drawing. Your college teachers are wrong if they think all evap coils are set up with a single feed in the bottom of the coil. It will be multiple circuits with the bottom of each circuit being feed at its bottom.

    You need to look closer at the systems you work on.
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  8. #34
    Join Date
    Jan 2013
    Posts
    19
    Thanks guys. I do look at them & i'm still learning every day but ya'll don't understand this small town AL stuff. We might go a year without seeing anything above a 10 SEER!

  9. #35
    Join Date
    Sep 2005
    Location
    Atlanta GA area
    Posts
    21,433
    Quote Originally Posted by JMack13 View Post
    Thanks guys. I do look at them & i'm still learning every day but ya'll don't understand this small town AL stuff. We might go a year without seeing anything above a 10 SEER!
    Used to be 75% of what I saw was builder grade... Now I have a customer base that wants better. Takes time to build that base.

    How about filling out your profile with a city/state... then we will know the climate you are in.
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  10. #36
    Join Date
    Feb 2012
    Location
    Durham, NC
    Posts
    73
    The temperature sensors have an ohm reading related to the temp being read. Your trane service manual will have a table to follow for these measurements. Just something worth checking out.

  11. #37
    Join Date
    Nov 2008
    Location
    Bristol Va.
    Posts
    541
    10 seer or 18 seer Trane or Goodman all are designed similar meaning all circuits are very much the same maybe 4 to 9 inches in height on a cond. coil and as stated has many and the size dictates how many circuits, evap coil not the same but has several circuits maybe 2 circuits per ton. any one circuit could be restricted we and you can not tell over the phone or computer. so just because it is an 18 seer it is still a normal heat pump circuit refrigerant circuit and defrost the same.

    dogboy

  12. #38
    Join Date
    Mar 2004
    Location
    Chester County PA
    Posts
    386
    Maybe it's only running single stage and never ramps up.
    When I find a heat pump with half, or less, of the outdoor coil frozen solid it usually means under charged. If it's a 2 stage heat pump maybe it never comes out of 1st stage
    "That motor's done, he let the factory smoke charge out!"

  13. #39
    Join Date
    Mar 2002
    Posts
    516
    Check subcooling. I would guess either low subcooling and the top circuit not getting a solid flow of liquid or a restriction in the top circuit.

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