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Thread: Minimum Load

  1. #1
    Join Date
    Aug 2002
    Southold, NY

    Minimum Load

    What is the minimum load on a new McQuay 500-ton chiller? I say 40% someone here says 10%.

  2. #2
    Join Date
    Jan 2010
    Cedar Rapids, IA
    I can't answer this myself, but the pros on here will need to know your tech- are you running centrifugal, scroll, screw, turbocor? May even help them to know if its air or water cooled. Best luck.

  3. #3
    Join Date
    Aug 2009
    Prattville, Alabama
    Also, are you referring to the minimum cooling load (tons), or minimum compressor motor load (amps)? They are not the same thing.... I am not familar with that machine, but I have seen others unload to 10%, or less, of capacity, but still run loaded at about 30-40% motor load.

  4. #4
    Join Date
    Nov 2004
    Depend of the software and the administrator privileges you have over the program.You can make this machine to unload and load depend of the vain,slide,compressor speed etc. and whithout the knolege of the software and the machine mechanical minimum requirements is risky business.
    There is no 10% or 40% ,depend on yuor loop load and the process the chiller is used for.I assume for 500 T chiller there is a option to increase artificialy the loop load and then to run in minimum load.What proces they use and how many cirquits on the loop they have,how many pumps,tower controls etc. is a complex issue.
    OOOPS!Try again!Well done!

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