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  1. #1
    Join Date
    Aug 2006
    Location
    Wisconsin
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    1,504

    Chiller with Plate and Frame heat exhanger

    I am working on a chiller with a plate and frame heat exchanger on the leaving water side of the chiller. I am starting to trip on freezestat and want to clean the heat exchanger. I have never taken one apart and would love some advice on what to do and not do from others who have. This is a fairly large heat exchanger and I already purchased some new gaskets just in case. Wondering how you handle the plates once you take it apart to prevent damage while cleaning. Thank you in advance for any help.
    Buy American! The job you save may be your own.

  2. #2
    Join Date
    Oct 2011
    Location
    La.
    Posts
    280
    Use an acid solution to clean the water side. I would stay away from taking the exchanger apart.

  3. #3
    Join Date
    Aug 2009
    Location
    Prattville, Alabama
    Posts
    2,036
    I'm a little confused. What is the plate and frame used for? Why do you think it is causing your problem?

  4. #4
    Join Date
    Jul 2011
    Location
    East coast USA
    Posts
    962
    Quote Originally Posted by Nuclrchiller View Post
    I'm a little confused. What is the plate and frame used for? Why do you think it is causing your problem?
    yes that's a good question I'm curious too. i had this set up using free cooling.

    Also, i would run cleaning solutions through it first if you thinks it dirty. I would not take it apart unless i saw leaks or if you had a restriction. Also, i would look at their chemical treatment process as well.

  5. #5
    Join Date
    Aug 2006
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    Wisconsin
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    Quote Originally Posted by Nuclrchiller View Post
    I'm a little confused. What is the plate and frame used for? Why do you think it is causing your problem?
    Sorry for being vague on description. The chilled water leaves the evaporator and is circulated thru a closed pressurised loop into a plate and frame heat exchanger. Chilled water on one side and very nasty process water on the other. Because of the nasty process water they use a plate and frame so it can be pulled apart for cleaning. Problem is I have never done it. Seems pretty straight forward but would like to hear from others who have taken them apart. Just to clarify, the plate and frame is not on the chiller. It is connected to the process side of things and the chilled water is used to cool the nasty process water. Hope this makes it a little more clear.
    Buy American! The job you save may be your own.

  6. #6
    Join Date
    Jul 2012
    Location
    Western KY
    Posts
    1,221
    Agree with prior posts. Would not take apart unless absolutely nessisary. Verify load and CW in and out temps at chiller barrel and then in and out temps of process fluid at heat exchanger.

  7. #7
    Join Date
    Jan 2008
    Location
    In the work truck
    Posts
    2,999
    Take the measurement of the end plates before you loosen it up and write it on the plate.. Take your time and have help to switch out when cleaning.. I dont remove the plates if I dont have to. I clean them in place once you open everything up. Double check those gaskets to make sure they are in place and nothing is on them while putting them back together..
    Gotta have the right tool for the job!

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  8. #8
    Join Date
    Aug 2006
    Location
    Wisconsin
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    1,504
    Quote Originally Posted by Pascone10 View Post
    Take the measurement of the end plates before you loosen it up and write it on the plate.. Take your time and have help to switch out when cleaning.. I dont remove the plates if I dont have to. I clean them in place once you open everything up. Double check those gaskets to make sure they are in place and nothing is on them while putting them back together..
    By measurement I assume you mean the distance between the end plates? How do you clean them in place, with a hose?
    Buy American! The job you save may be your own.

  9. #9
    Join Date
    Oct 2011
    Location
    La.
    Posts
    280
    We use very large ones for this same reason and we use cleaning solution twice a year. Call a chemical company and they can help you if this is the route you wish to take. If not, call alpha laval or whoever made it and they will give you a procedure to follow.

    good luck

  10. #10
    Join Date
    Nov 2008
    Posts
    366
    Get the IOM for procedure.

    Don't mix up the plates. Measure and mark plates before you take it apart.

    Get torque specs. they will be pretty high. Pull up plates evenly measuring as you go.

    And above all have a pneumatic impact wrench and socket to fit or you will be there for ever.

  11. #11
    Join Date
    Aug 2006
    Location
    Wisconsin
    Posts
    1,504
    Thank you to all for the advice.
    Buy American! The job you save may be your own.

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