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Chiller recommendations

Discussion in 'Technical Discussion' started by Danvilletim, May 11, 2019.

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  1. wdrzal

    wdrzal Senior Member

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    But if you don't have the extra air flow , you won't get the benefit of adding 12,000 btu. You may just circulate colder water until a freeze-stat shuts it down. You can't just pipe cold water around a loop for cooling, there are cooling coils in that loop with a fan/blower. Their just not technically evaporators, that happens in the heat exchanger in a chiller system, usually tube in tube but can be plate type. Are you going to use this system for heating also ? 5 ton chillers usually draw ~35 amps and are on 8 gauge wire (40 amp), I was just saying going to 6 ton you may need 6 gauge wire. Who ever recommended take your total heat load and install two compressor/ chiller units and 2 loops in case one fails. It's also possible to have just one cold water loop cooled by 2 chiller units.
  2. Capt J

    Capt J Senior Member

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    You do have to consider the loop hose size and circulation pump size. Also need to consider the BTU's of all of the air handlers, because if they're not big enough the chiller will short cycle because the air handlers can't take anymore cooling from the loop anyways.
  3. Pascal

    Pascal Senior Member

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    The
    The loop, yes. I mentioned it earlier but not the refrigeration pipes which are part of the cooler

    Chillers come in as needed. For instance on cloudy days or in the evening we usually have just one chiller running. The second one isn’t needed.

    My point was that a small increase in chiller capacity may not require any upgrading although the chiller manufacturer would need to be given things like hose sizes, pumps flow etc to be sure
  4. bayoubud

    bayoubud Senior Member

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    Feb 19, 2017
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    Location:
    Florida
    If the air handlers are 18 years old same as the chillers they may not be as efficient. We recently replaced all but one of our 17 year old air handlers and running on one 4 ton chiller, system is cooling much better. Also, had heat reflecting film installed on the ph windows which made a huge difference. Will see how it goes when it gets summer hot.

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