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Thread: 404a help

  1. #1
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    404a help



    I have a 404a glycol chiller that doesnt have a typical expansion valve. On the high side I have a copper bulb, into a smaller diameter copper, then into 3/8" evap coil. Im new to components. Can someone explain what ive got?



  2. #2
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    Re: 404a help

    Is the small diameter copper a metered orifice?

  3. #3
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    Re: 404a help

    Sounds like you have a capillary expansion device.

    See...

    http://www.acr-news.com/news/news.asp?id=658
    Last edited by Brian_UK; 13-11-2013 at 10:50 PM.
    Brian - Newton Abbot, Devon, UK
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    Re: 404a help

    Sounds very like a cappillary system, presume theres no liquid receiver?

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    Re: 404a help

    Out of compressor into condensor, out of condensor into copper bulb into small diameter tube.

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    Re: 404a help

    Pretty application specific seems like. Damn. Im upgrading compressor from 3/4 to 1.5hp. Im guessing ill need an expansion valve.

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    Re: 404a help

    Quote Originally Posted by KCromwell.AES View Post
    Pretty application specific seems like. Damn. Im upgrading compressor from 3/4 to 1.5hp. Im guessing ill need an expansion valve.
    What do you hope to achieve with the planned upgrade?
    Mostly found in Oxfordshire, UK :)

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    Re: 404a help

    Unbalanced system. More fun!

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