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  1. #1
    I help my father out part time in the summer months in his small but successful hvac business out here in the country towns around Brenham,Tx. My question is that since we've replaced a Tempstar 3.5 ton package unit in a trailer house it has started to freeze up. There are no restictions on the duct work underneath, the fan speed has been set on high, the pressures are about 90 suction and 290 liquid around 2 pm and it's reaching around 102 degrees outside. I know it's probably something simple but if I could get some advice I would appreciate it. He thinks it's a bad expansion valve but I sure would hate to have to move a 300 pound unit to replace it if thats not the problem. Please help. Thank you.
    Scott Abel.

  2. #2
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    66,808
    Well its not freezing up while the vapor pressure is at 90psi if its r 22.

    With the almost no info you gave, hard to give advise.

    If you want help.
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  3. #3
    Join Date
    Jun 2006
    Location
    northern Il.
    Posts
    131
    This is a package unit??? Sets out side with large flex duct leading into the trailer???
    I have found anything from no return, to a return under a rug, under the been bag. Most often, no filter. Cats and small animals like laying on the flex duct under the trailers (flat flex duct= no air? ) kinked or damaged duct (insulation inside duct, blocking air flow) Check for under sized duct, (14" flex duct fastened to 12"x4" trailer duct)

    I don't think you are moving enough air. (If unit is sized properly)
    I started out with nothing, and I still have most of it left

  4. #4
    I have a feeling airflow is the problem, the trailer is 99.9% secure form animals getting underneath that was customers main concern. Old unit was replaced with same size new unit, the only thing that I see could be a factor with the airflow is a small end table sitting about 8-10 inches above the return that is nestled in the floor against the wall which is bascially lining up with the unit outside. The return duct is approximately 5 feet from inside to outside 14" flex. When the coil is thawed there is a great deal of volume coming from the floor vents and the pressures are running as I listed previously. I hope this helps.

  5. #5
    Join Date
    Feb 2005
    Location
    Miami, Fl.
    Posts
    3,559
    Originally posted by beenthere
    Well its not freezing up while the vapor pressure is at 90psi if its r 22.

    With the almost no info you gave, hard to give advise.

    If you want help.
    Register as a pro, and ask questions in the pro tech forum.


    If you are a professional in the HVAC/R field, please fill out your profile and register as such. Then, you may join us in the professional areas.

    Forum Rules

    beenthere gave you good advise, best follow it.

  6. #6
    i'm not a pro just help my father out in my off time from my real job, i'll back off and let my pops handle it i understand the sensitivity of the matter and all that's involved in the field, thanks.

  7. #7
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    66,808
    Originally posted by dscottnmel
    i'm not a pro just help my father out in my off time from my real job, i'll back off and let my pops handle it i understand the sensitivity of the matter and all that's involved in the field, thanks.
    You could have posted your reply to me here instead of sending an e mail.


    ----- Original Message -----
    From: XXXXXXXXXXXXXX
    To: XXXXXXXXXXXX
    Sent: Saturday, August 19, 2006 8:13 PM
    Subject: hvac post


    thanks for pointing out i need to post on the pro board so the moderator got on my butt, I was just trying to get some simple advice to help my old man cuz hes getting old and the business will be gone when he is gone, but i guess it's just like a yankee to be an a$$, we arent hacks and my dad does a damn good job with his business and i'm not an a/c pro and dont aspire to be. i have my high school diploma and a college degree plus i know enough not to suffer from a/c and heating problems, it's all relative, and i'm sure you'll have some tech school comeback for me, but just some advice for you guys, not everyone is ignorant to your trade and one day you might come across someone who knows something and you won't be able to dazzle them with your bull$hit, it was just a simple question, but of course arrogant donkeys like yourself try to make people look stupid just to make your blue collar self feel better.






    [Edited by Lusker on 08-19-2006 at 09:02 PM]
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  8. #8
    Join Date
    May 2004
    Posts
    11,858
    [advice deleted by Lusker]

    Hey you... your an ass. If you want yankee bullsh*t I'll call one of them for you...


    Oh yeah, goodbye.









    [Edited by Lusker on 08-19-2006 at 09:04 PM]

  9. #9
    Join Date
    Jan 2004
    Location
    Lancaster PA
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    66,808
    Originally posted by Lusker
    [advice deleted by Lusker]

    Hey you... your an ass. If you want yankee bullsh*t I'll call one of them for you...


    Oh yeah, goodbye.









    [Edited by Lusker on 08-19-2006 at 09:04 PM]


    LOl, I took the ats and isps out, thought that was good enough.

    Sorry bout that.
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  10. #10
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    66,808
    Originally posted by Lusker
    [advice deleted by Lusker]

    Hey you... your an ass. If you want yankee bullsh*t I'll call one of them for you...


    Oh yeah, goodbye.









    [Edited by Lusker on 08-19-2006 at 09:04 PM]

    He has re e mailed me and apoligized to me.
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  11. #11
    Join Date
    May 2004
    Posts
    11,858
    I'll let him back in if he apologizes to you and ARPA


    I understand he needs help but ragging on us is no way to do it

    ARPA is 100% right about the rules.


    It's up to him and he will find it up to me before he gets in the pro area.

    Each of you post if he email's you an apology and I will let him back in






  12. #12
    Join Date
    May 2004
    Posts
    11,858

  13. #13
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    66,808
    Originally posted by Lusker
    I'll let him back in if he apologizes to you and ARPA


    I understand he needs help but ragging on us is no way to do it

    ARPA is 100% right about the rules.


    It's up to him and he will find it up to me before he gets in the pro area.

    Each of you post if he email's you an apology and I will let him back in





    He has apologized to me.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

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