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  1. #1
    Join Date
    Jun 2010
    Location
    Charlotte, NC
    Posts
    155

    What kind of chiller is this?

    This chiller, it looks like it is an aircooled chiller.

    How does it compress the refrigerent? It does not make the typical chiller sound I am used to hearing, much quieter.

    How old is it, and how many tons? Should I be budgeting for replacement and if so, what is a good option?

    It is unusual for me to see a chiller at a small, 8,000 sf building, which unfortunately, is a reheat system, very high utility bills, but I have not figured out any way to convert it to a better system.

    Thanks everyone for being so helpful.

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  2. #2
    Join Date
    Feb 2008
    Location
    Massachusetts
    Posts
    701
    It's 25 tons, I believe It's manufactured in 1993 if I'm reading the serial number correctly, nice unit, I work on a lot similar but the 15 ton capacity.

    Sent from ivy PC36100 using Tapatalk 2

  3. #3
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,079
    Carrier numbers are bigger than capacity so probably a hair under 25 ton. Likely has a Carlyle semihermetic. Those are not known for being quiet!

  4. #4
    Join Date
    Dec 2005
    Posts
    1,915
    Quote Originally Posted by Maikerum View Post
    This chiller, it looks like it is an aircooled chiller.

    How does it compress the refrigerent? It does not make the typical chiller sound I am used to hearing, much quieter.

    How old is it, and how many tons? Should I be budgeting for replacement and if so, what is a good option?

    It is unusual for me to see a chiller at a small, 8,000 sf building, which unfortunately, is a reheat system, very high utility bills, but I have not figured out any way to convert it to a better system.

    Thanks everyone for being so helpful.

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Size:  50.6 KB
    Not small chiller for that building. It can take care of fresh air.
    As for re-heat strategy was the old school when electricity was dirt cheap. Today, it is illigal to engineer that. As for this building, It will requires better strategies and DDC logics to reduce the elctric bills. The owner would never understand the up-front cost and the saving in the long run.

  5. #5
    Join Date
    Feb 2011
    Location
    Chesterfield, Virginia, USA
    Posts
    84
    It is a little over 20 tons (024 = 20tons) and was made the 45th week of 1993. It should be a standard Carlyle cast iron compressor with one or two unloaders, most likely suction cut-off unloading.

  6. #6
    Join Date
    Aug 2003
    Location
    Fort Worth, TX
    Posts
    11,320
    Quote Originally Posted by BaldLoonie View Post
    Carrier numbers are bigger than capacity so probably a hair under 25 ton. Likely has a Carlyle semihermetic. Those are not known for being quiet!
    A Carlyle semi-hermetic is more quiet than a 19XR centrifugal with no sound kit!
    • Electricity makes refrigeration happen.
    • Refrigeration makes the HVAC psychrometric process happen.
    • HVAC pyschrometrics is what makes indoor human comfort happen...IF the ducts AND the building envelope cooperate.


    A building is NOT beautiful unless it is also comfortable.

  7. #7
    Join Date
    Jul 2003
    Location
    Orange County N.Y.
    Posts
    1,176
    Quote Originally Posted by Shophound View Post
    A Carlyle semi-hermetic is more quiet than a 19XR centrifugal with no sound kit!
    I don't think that you are going to find a 20-25 ton centrifugal chiller. :-) The compressor is enclosed in a cabinet and they are usually quiet enough. Good chillers for the most part as long as you have enough water and a load on them. The one in this post is probably showing its age.

    ...Ron
    Roof Rat

  8. #8
    Join Date
    Aug 2003
    Location
    Fort Worth, TX
    Posts
    11,320
    Quote Originally Posted by rscamaro View Post
    I don't think that you are going to find a 20-25 ton centrifugal chiller. :-) The compressor is enclosed in a cabinet and they are usually quiet enough. Good chillers for the most part as long as you have enough water and a load on them. The one in this post is probably showing its age.

    ...Ron
    True on the tonnage aspect. But if you put up a rack of Carlyle 06E's (as many higher tonnage recip chillers have) against a screaming 19XR in a loudness contest, I think the high pressure centrifugal would still win. The 06E's purr in comparision to that ear drum shattering squeal.

    OTOH a large tonnage recip chiller (one or two large compressors) can crank out some sound.
    • Electricity makes refrigeration happen.
    • Refrigeration makes the HVAC psychrometric process happen.
    • HVAC pyschrometrics is what makes indoor human comfort happen...IF the ducts AND the building envelope cooperate.


    A building is NOT beautiful unless it is also comfortable.

  9. #9
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,079
    My church has 2 condensing units behind the parish hall. One looks like the chiller pictured except DX, the other is a notch smaller, maybe a 15 ton. When they are on, between the Carlyles and the fans, you can hear them for a block. The big boy for the sanctuary is behind a stone wall 15' high. 1 Carlyle on isn't too bad and fortunately that usually does it. But both on, walking across the courtyard you sure hear them. But then I can remember hearing one centrifugal in the past. Don't recall if Trane or Carrier. Had a loud whine seems to me.

  10. #10
    Join Date
    Jul 2003
    Location
    Orange County N.Y.
    Posts
    1,176
    Quote Originally Posted by BaldLoonie View Post
    But then I can remember hearing one centrifugal in the past. Don't recall if Trane or Carrier. Had a loud whine seems to me.
    That would be correct in some cases. Different impellers creat different sounds. Speed can make a difference in pitch too.

    ...Ron
    Roof Rat

  11. #11
    Join Date
    Jan 2008
    Location
    Dallas ,Texas
    Posts
    3,707
    Quote Originally Posted by rscamaro View Post
    That would be correct in some cases. Different impellers creat different sounds. Speed can make a difference in pitch too.

    ...Ron
    Probably a 23XL.

  12. #12
    Join Date
    Jul 2003
    Location
    Orange County N.Y.
    Posts
    1,176
    Quote Originally Posted by Dallas Duster View Post
    Probably a 23XL.
    That would be a screw machine, which sometimes sound like a box of rocks when running. Only the special ones though.

    ...Ron
    Roof Rat

  13. #13
    Join Date
    Jan 2008
    Location
    Dallas ,Texas
    Posts
    3,707
    Quote Originally Posted by rscamaro View Post
    That would be a screw machine, which sometimes sound like a box of rocks when running. Only the special ones though.

    ...Ron
    Yep those things are loud.

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