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  1. #40
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    Feb 2016
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    Louisburg Kansas
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    Unfortunately if you can't measure the shut off head you can't determine what size impeller that is in it without tearing it down. In your case I would make certain there is no electrical problem and if not take the pump apart to see what impeller is installed. As was previously mentioned the pump will draw less current moving water than running at shut off (dead head). If there is no electrical problem it is strongly indicated the impeller size is too big for the motor.
    Your description of the problem however indicates an electrical problem.
    No man can be both ignorant and free.
    Thomas Jefferson

  2. #41
    Join Date
    Feb 2005
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    Florida
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    Thread Starter
    Quote Originally Posted by WAYNE3298 View Post
    Unfortunately if you can't measure the shut off head you can't determine what size impeller that is in it without tearing it down. In your case I would make certain there is no electrical problem and if not take the pump apart to see what impeller is installed. As was previously mentioned the pump will draw less current moving water than running at shut off (dead head). If there is no electrical problem it is strongly indicated the impeller size is too big for the motor.
    Your description of the problem however indicates an electrical problem.
    I have a few of these same pumps out there without any problems. But I am looking at a electrical problem I believe. I checked the voltage at the pump with no electrical load and it was spot on.

    It has a new AB starter and overload, my plan is a new 14/4 cable to the pump.

  3. #42
    Join Date
    Feb 2008
    Location
    Dubai
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    614
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    Quote Originally Posted by jimp View Post
    diagram shows star and delta. at present, how the motor connected with the terminal ,direct star or direct delta??? or star delta combination?

  4. #43
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    Feb 2005
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    Florida
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    Thread Starter
    Top diagram.

  5. #44
    Join Date
    Nov 2004
    Location
    up in the hizzy
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    Quote Originally Posted by jimp View Post
    Top diagram.
    So you changed the pump and the new one works fine.....right ?
    Are these Chinese knockoff ?
    There is not better place for the working men than the union! 100% UA the only HVAC union!

  6. #45
    Join Date
    Feb 2005
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    Florida
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    Thread Starter
    Quote Originally Posted by valdelocc View Post
    So you changed the pump and the new one works fine.....right ?
    Are these Chinese knockoff ?
    Going there Friday, but I going to run a new cable first before I change the pump.

    Made in Taiwan, and I have a ton of them out there. Only problem I've see is one of them went to ground and a couple bad seals on others.

    http://www.walrusamerica.com/

  7. #46
    Join Date
    Aug 2009
    Location
    Prattville, Alabama
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    Quote Originally Posted by jimp View Post
    ... I checked the voltage at the pump with no electrical load and it was spot on.
    ....
    Maybe I'm missing something, but how do you do this?
    In honor of RichardL: "Ain't 'None' of us as smart as 'All' of us".

  8. #47
    Join Date
    Nov 2011
    Location
    East Side
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    I have faith, but double check your wire labels at the peckerhead.

    Is there any way to see if it’s locked up?


    Also, is this a multistage, or a single impeller?

  9. #48
    Join Date
    Dec 2014
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    I don't know guys, I'm still thinking that if you had swapped pumps two and a half weeks ago you would have known right then if it was a pump problem or a system/ electrical problem.

    It is weird that a pump failed really for no known reason, and the new one would fail right away too.

    Cheers!

    Sent from my SM-G950U using Tapatalk

  10. #49
    Join Date
    Sep 2002
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    Disconnect all the wires at the pump and bring the starter in?

    Quote Originally Posted by Nuclrchiller View Post
    Maybe I'm missing something, but how do you do this?
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  11. #50
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    Feb 2005
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    Florida
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    Thread Starter
    Quote Originally Posted by Nuclrchiller View Post
    Maybe I'm missing something, but how do you do this?
    Pulled the wires off at the pump and checked the incoming voltage.

  12. #51
    Join Date
    Feb 2005
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    Florida
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    Thread Starter
    Quote Originally Posted by 71CHOPS View Post
    I have faith, but double check your wire labels at the peckerhead.

    Is there any way to see if it’s locked up?


    Also, is this a multistage, or a single impeller?
    Double checked the wiring four times, had the helper double check me. Its multistage and not locked up.

  13. #52
    Join Date
    Feb 2005
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    Florida
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    Thread Starter
    Run a new cable and fired it up, and it let the contained smoke out. Bahaha.

    Installed a new pump and its A OK.

    Got my 30 gpm, Amps are in spec.

    Heading home.

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