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  1. #1
    Join Date
    Oct 2009
    Posts
    7

    Heat Pump Humidity: Reply if you want to answer techncial questions

    Does anyone have any actual technical information besides sitting with a thumb up a nose, critiquing questions? what genius to say ‘get a qualified tech”.

    No wonder the AC business has so many problems and complaints.

    These people wasting time saying get a competent technical person, are either usless workers themselves, or not even ac people.

    First of all techs need to be able to read. It’s been mentioned several times in these postings about the heat pump not dehumidifying, that 2 different “best of phoenix” companies with clean records can’t determine how to fix the heat pump regarding it not dehumidifying. Secondly, these are only a few questions and not all case specific.

    If anyone has any real guts, instead taking cheap shots, then give a shot at the following questions if you would like:

    oh, to make things clear: 2 different “best of phoenix” companies with clean records came out on a humidity question on a trane xe 1000 heat pump and could not figure out the lack of dehumidification problem and be able to fix the heat pump.


    1. Any idea what would be the point of taking the txv bulb from inside the unit and placing it outside the unit on the suction line?

    2. In this case I was told that the coil on the inside air handler was dry and it was not suppose to be?. That placing the TXV bulb outside the air handler in a new location would fix that problem?. Should that ordinarily fix the problem?

    3. If this bulb is to blame is it letting too much Freon get in? or not enough Freon getting in?

    4. There was mention about moving the bulb to a warmer spot, Does that restrict the amount of freeon? or increases the flow? Why would the suction line be considered a "warmer" spot?

    5. The txv bulb normally sits on the internal part of the suction line does it not?

  2. #2
    Join Date
    Nov 2008
    Location
    port-land OR
    Posts
    111
    best of phoenix is a grownup equivalent to the highschool prom queen vote.


    1. Any idea what would be the point of taking the txv bulb from inside the unit and placing it outside the unit on the suction line?

    shooting in the dark to fix a problem you dont understand

    2. In this case I was told that the coil on the inside air handler was dry and it was not suppose to be?. That placing the TXV bulb outside the air handler in a new location would fix that problem?. Should that ordinarily fix the problem?

    no

    3. If this bulb is to blame is it letting too much Freon get in? or not enough Freon getting in?

    depends. if suction pressure is low and superheat is high its feeding too little. if the saturation temp on the low side is above the dewpoint then it could be feeding too much.


    4. There was mention about moving the bulb to a warmer spot, Does that restrict the amount of freeon? or increases the flow? Why would the suction line be considered a "warmer" spot?

    it would increase the flow assuming pressure remained the same which it won't. the txv maintains a specific suction line temp based on suction pressure in order to maintain superheated gas to the compressor. the sensing bulb is supposed to be insulated and mounted to the suction line at a 3-5 o'clock or 7-9 oclock position. the sensing bulb needs to sense the temp of the refrigerant in the suction line. not the environment on the outside of the suction line.

    5. The txv bulb normally sits on the internal part of the suction line does it not?

    inside the suction line...no. inside the unit...sometimes but not always. it should be mounted in the factory location and insulated.

    sorry that i cant go into your issue further but it sounds like yo have a refrigerant circuit issue and such things require further investigation on site or discussion in the pro forum.

    enjoy the sunshine down there!

  3. #3
    Join Date
    Jul 2008
    Location
    Denver, CO
    Posts
    4,229
    I answered your question in another thread you started if you would have read it. You are not getting off on the right foot here, you need to read the forum rules. And I will answer your question again as I did in the other thread.

    The bulb senses the temperature of the suction line and opens or closes the expansion valve as needed to maintain proper superheat. Moveing the bulb outside the case is just a band aid. If the superheat is off because the TXV is not metering properly the valve should be adjusted to maintain the appropriate superheat or replaced. The only possible thing that moveing the bulb ouside the case would do is cause the TXV to throttle shut a little bit due to the warmer ambiant air surrounding the bulb (even though it's insulated) and allow less refrigerant into the coil.

  4. #4
    Join Date
    Nov 2005
    Location
    Charlotte, N.C.
    Posts
    965
    Get a qualified tech!
    Those who restrain desire do so because theirs is weak enough to be restrained. (William Blake)

  5. #5
    Join Date
    Jul 2008
    Location
    Denver, CO
    Posts
    4,229
    He has created three threads asking the same question.

  6. #6
    Join Date
    Nov 2008
    Location
    port-land OR
    Posts
    111
    Quote Originally Posted by Tiger93rsl View Post
    I answered your question in another thread you started if you would have read it. You are not getting off on the right foot here, you need to read the forum rules. And I will answer your question again as I did in the other thread.

    correction...warmer suction line opens the valve to feed more refrigerant in order to lower superheat by increasing refrigerant flow. colder suction line closes valve in order to raise superheat by decreasing refrigerant flow.

  7. #7
    Join Date
    Jun 2004
    Location
    Location:Raleigh NC
    Posts
    9,664
    You tell us the High and Low side pressure you Supper heat your Subcool
    your SP & TSP,cfm wet bulb and dry bulb at the return and supply. and May we can tell you something.

    in out
    If you help others then you are a Success

  8. #8
    Join Date
    Jul 2008
    Location
    Denver, CO
    Posts
    4,229
    Quote Originally Posted by My77GMC View Post
    correction...warmer suction line opens the valve to feed more refrigerant in order to lower superheat by increasing refrigerant flow. colder suction line closes valve in order to raise superheat by decreasing refrigerant flow.
    Oh yes so it is, thank you for this correction. This guy wouldn't know the difference anyway he apparently dosen't listen to what any of us have to say anyhow. I don't even know why we bother with this guy.

  9. #9
    Join Date
    Jun 2004
    Location
    Location:Raleigh NC
    Posts
    9,664
    Doc I fell bad

    what's your temp
    Don't know

    other Doc took blood

    what he find

    don't know

    is the pain sharp or dull

    Can't say

    were is it

    can't tell you,
    some doc cant help me even after I gave him ton of info
    If you help others then you are a Success

  10. #10
    Join Date
    Nov 2008
    Location
    port-land OR
    Posts
    111
    well then normally i would feel bad about hijacking this but...


    anyone been on any good fishing trips lately?

  11. #11
    Join Date
    Jun 2004
    Location
    Location:Raleigh NC
    Posts
    9,664
    other guy move the worms way?
    If you help others then you are a Success

  12. #12
    Join Date
    Apr 2004
    Location
    Muskegon, Mi.
    Posts
    425
    Quote Originally Posted by My77GMC View Post
    well then normally i would feel bad about hijacking this but...


    anyone been on any good fishing trips lately?
    Been on Lake Huron with my pops and my brother. Caught our limit of walleye in about 4 hours.

  13. #13
    Join Date
    Dec 2008
    Location
    Dixiana, AL
    Posts
    2,611
    "hoo" are you? Put something in your profile about your own experience level if you want others to help you. I can honestly tell you, if you're a mechanic and you have to ask the type questions you asked here, you may want to find another line of work. If you're a consumer looking for answers, you need to work on your method of requesting information. Either way, after the way you started off here, you're lucky to get anyone to speak to you at all.

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