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  1. #1
    Join Date
    Jan 2001
    Posts
    765

    Filter drier on wshp

    What do you guys do on compressor changes on water source heat pumps. I am going to install on LL. The thing will then be on suction side of txv in heat. Will that hurt anything if it doesnt plug up. This is a 5 ton mcquay.

  2. #2
    Join Date
    Sep 2012
    Location
    Central Florida
    Posts
    885
    Bi-flow filter drier. We normally use Parker's line in our factory. They have internal check valves so once they trap particles and moisture it does not get blown back in to the system during the reversed cycle.

  3. #3
    Join Date
    Jan 2001
    Posts
    765
    Yeah that was my plan. I wasnt sure about in the heat mode it being on the suction side. The customer bought the compressor and I doubt he will pay to drop unit to change drier

  4. #4
    Join Date
    Sep 2012
    Location
    Central Florida
    Posts
    885
    Quote Originally Posted by hvac17011 View Post
    Yeah that was my plan. I wasnt sure about in the heat mode it being on the suction side. The customer bought the compressor and I doubt he will pay to drop unit to change drier
    We ship them installed on the LL without a bypass for the most part on our systems.

    You could put a couple tees and a check valve to by-pass it in heating. A check valve is not to expensive.

    Of course with this you would lose filtration during heating.

  5. #5
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    3,990
    it was my understanding that all bi-flow driers had check valves in them

    is this not true?

  6. #6
    Join Date
    Sep 2012
    Location
    Central Florida
    Posts
    885
    Quote Originally Posted by gravity View Post
    it was my understanding that all bi-flow driers had check valves in them

    is this not true?
    That was my understanding as well.

  7. #7
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    3,990
    now im thinking. how do we know which way is for cooling? lol

    never have really payed attention.

  8. #8
    Join Date
    Sep 2012
    Location
    Central Florida
    Posts
    885
    they are setup so that it does not matter which way they are sweated in.

  9. #9
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    3,990
    so they always filter?

    i was thinking it hit a check valve in one direction and bypassed the core so it didnt blow the junk back out.

    so your saying they are all built so liquid flows from the outside thru the center of the core and out in both directions?

  10. #10
    Join Date
    Sep 2012
    Location
    Central Florida
    Posts
    885
    http://www.emersonclimate.com/europe..._BFK_35033.pdf

    When our factory was changing over to work with 410a our lovely engineers did not account for the higher pressures and thus did not put in larger filter driers. Thus I saw a bunch of these fail in the test station. Cut open a fair number of them, so saw how they worked. Pretty neat little devices.

  11. #11
    Join Date
    Nov 2004
    Location
    up in the hizzy
    Posts
    1,384
    a filter/dryer in a WSHP may do more harm than good if left permanently, I rather flush it with rx11 and put it back the way it was.

  12. #12
    Join Date
    May 2011
    Location
    tallahassee,fl
    Posts
    380
    Quote Originally Posted by valdelocc View Post
    a filter/dryer in a WSHP may do more harm than good if left permanently, I rather flush it with rx11 and put it back the way it was.
    Please explain ur theory!!!

  13. #13
    Join Date
    Sep 2012
    Location
    Central Florida
    Posts
    885
    Quote Originally Posted by valdelocc View Post
    a filter/dryer in a WSHP may do more harm than good if left permanently, I rather flush it with rx11 and put it back the way it was.
    How does it do harm? I'm trying to learn all I can and don't really trust all they have taught me where I currently work.

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