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  1. #1
    Join Date
    Jan 2010
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    Houston, TX
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    Clogged Shell and tube exchanger

    We have a Old York chiller with a shell and Tube exchanger. Over the years it has had poor water treatment and is now clogged with rust. Does anyone know how to unclog this mess. We even took the end plates off and could not get it. Help!

  2. #2
    Join Date
    May 2008
    Location
    Central Pennsylvania
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    Is it a flooded or dx barrel? I'm guessing it is the condenser your having problems with.

  3. #3
    Join Date
    Jan 2010
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    Houston, TX
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    It is the chilled water side and it is flooded.

  4. #4
    Join Date
    Jan 2008
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    East of big city prices.
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    Ok let's go this route. Does the water go thru the tubes or around the tubes?

  5. #5
    Join Date
    Jan 2010
    Location
    Houston, TX
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    Around it

  6. #6
    Join Date
    Aug 2000
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    Under my tree
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    Model number would help. If its a DX barrell probably be easier to replace it if its that fouled. Chemical cleaning may help.

    What ends did you take off? The refrigerant circuit heads?
    Not much to say, just hanging in my shade tree!!!!

  7. #7
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    Jan 2008
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    East of big city prices.
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    Describe what you were able to see when you took the endplates off?

  8. #8
    Join Date
    Jan 2010
    Location
    Houston, TX
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    Sorry, I just noticed I wrote flooded but it is a DX. When I take the end plates off I see the tubing bundles that a filled with R22. This is the evap.

  9. #9
    Join Date
    May 2008
    Location
    Central Pennsylvania
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    Like Abs said DX is hard to clean up. Maybe talk to your chemical treatment co. and see if they can recommend a chemical that will break the debris loose and not do any other damage.

  10. #10
    Join Date
    Jan 2009
    Location
    Virginia
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    Do you have the model and serial numbers?

  11. #11
    Join Date
    Nov 2008
    Location
    Auckland New Zealand
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    Like Chillerguy said it’s probably worth while seeing if the chemical guys have a shock dosage and then follow up dosages to try soften up the scale.

    Water treatment if like insurance you can’t see the benefits till you don’t have it.

  12. #12
    Join Date
    Jan 2010
    Location
    New Orleans metro area
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    161
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    Did a different brand long ago . Isolated the water side and fabbed a temporary recirc loop . we went 15% acid to start and dropped 5% till done .We spent 3 days Went thru some hell but got improvement .The boss even made us use a non rotating hammer drill over a striker plate to impart vibration and supposedly help the process . For the effort and time it would have beeen best to get a new barrel but it wasnt what the boss wanted. Water treatment shouldnt be shortchanged .Good luck !

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