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Thread: purge

  1. #1

    purge

    what does a purge do in a chiller

  2. #2
    Join Date
    Oct 2011
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    South Georgia
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    Trane has a good explanation. Here is a link.....
    http://www.austincc.edu/hart/lab-mat..._ctv_eb_84.pdf

  3. #3
    Join Date
    Oct 2006
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    Central Texas
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    Removes non-condensibles from LOW pressure centrifugal chillers (R-11, R-113, R-123 refrigerants) and absorbers (different animal). Evaporator runs in a vacuum, (R-113 condenser also in vacuum or low positive) leaks (on low side) will suck air in.
    Sic Semper Tyrannis.

  4. #4
    Join Date
    Nov 2008
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    some freezing metal shed somewheres
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    a purge on an absorption chiller is just a good sized vacuum pump.

    a purge on a low pressure chiller separates out noncondensibles by sucking gas off the top of the condenser and running it through a little refrigeration loop. condensed refrigerant gets returned, anything that doesn't condense gets pumped out of the top of a seperator tank by a little vaccum pump.

    why are you asking?

  5. #5
    Join Date
    Dec 2010
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    Down by the river
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    Quote Originally Posted by automig View Post
    a purge on an absorption chiller is just a good sized vacuum pump.


    a purge on a low pressure chiller separates out noncondensibles by sucking gas off the top of the condenser and running it through a little refrigeration loop. condensed refrigerant gets returned, anything that doesn't condense gets pumped out of the top of a seperator tank by a little vaccum pump.

    why are you asking?
    Not all purge units have a refrigeration circuit

  6. #6
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    Really? I thought That they did, which brand are you referring to? Which is the other method?

  7. #7
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    Really? I thought That they did, which brand are you referring to?

  8. #8
    Join Date
    Mar 2007
    Posts
    3,108
    The York Turboguard purge doesn't use a refrigeration circuit. It uses oil pressure, a small pump, some solenoid valves, and the differential refrigerant pressure created by the chiller when it's running to separate non-condensables from the refrigerant.
    "There is no greater inequality than the equal treatment of unequals."

    -Thomas Jefferson

  9. #9
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    Jun 2010
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    U.A. (upper Alabama)
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    The turbo guard does have a refrigeration circuit. It is an evap. coil inside the tank, although it is using the refrigerant from the chiller.

  10. #10
    Join Date
    Mar 2007
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    3,108
    Quote Originally Posted by cperk View Post
    The turbo guard does have a refrigeration circuit. It is an evap. coil inside the tank, although it is using the refrigerant from the chiller.
    I guess I should have been more specific and said it doesn't have a "dedicated mechanical refrigeration circuit that is separate from the chiller refrigerant circuit like a Trane Purifier/Earthwise or Redi-Purge"

    The one that I don't know very much of is the Carrier PreVent purge.
    "There is no greater inequality than the equal treatment of unequals."

    -Thomas Jefferson

  11. #11
    Join Date
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    ottawa canada
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    Quote Originally Posted by Tech Rob View Post

    The one that I don't know very much of is the Carrier PreVent purge.
    Theres only one thing you need to know about the Carrier Pre Vent purge ........ TOTAL J.U.N.K ...........
    The 64 roars to life Whoo hoo ...shes a rolling chassis .
    You bend em" I"ll mend em" !!!!!!!
    I"m not a service tech.. I"m a thermodynamic transfer analyst & strategic system sustainability specialist
    Best Austin Healey In Show twice in 2013 .....All those hrs paid off .

  12. #12
    Join Date
    Mar 2007
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    3,108
    Every 19D I've ever seen or worked on has had a Trane purge on it
    "There is no greater inequality than the equal treatment of unequals."

    -Thomas Jefferson

  13. #13
    Join Date
    Oct 2006
    Location
    Central Texas
    Posts
    632
    I've got several 19 D's with Redi Purges. At least your not running the old Skyguard or Carolina 2 stage purges, or those Enviropurges by Reftec. Seen the new gravity flow units, by Redi Controls? Supposedly a direct replacement for the purifier we'll see....
    Sic Semper Tyrannis.

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