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Air to Water Heat pump controllers

bmoon
bmoon Member Posts: 7
in Radiant Heating

We have a huge building with over 10,000 sq feet of space (business & residence). We've got 3 air to water heat pumps coming from the makers of the artic system and have a ton of fan coils (29 to be exact) spaced around the building to help with cold air in the summer. I'm looking for a great system that we can manage the actual temps of room and manage the heat pumps. Anyone know of something that can handle this?

Comments

  • pecmsg
    pecmsg Member Posts: 6,084

    What size are these 3 units?

    What is there now for controls?

    I'd let the manufacture control the air to water temps.

    GGross
  • Kaos
    Kaos Member Posts: 630

    There are two separate questions. How to run the AWHP units and how to control the FCUs.

    Most AWHP manufacturers show the unit in parallel on either a buffer tank or a low loss header with no controls between them. Basically set the outdoor reset on both units the same, turn them on and let them run on their own. Since each sees the same RWT it know the building load and can modulate the output to match. You'll have to talk to Arctic on what they recommend.

    Most FCUs are 3 speed fans, so you can use a standard multi stage thermostat to control it. Wire the first stage to med fan the 2nd to high fan and turn on water to when calling for heat/cool. You can also use one of the multizone control units. The thermostats don't need to connect to the AWHP at all, the heat pumps simply provide water at a temperature set by the outdoor reset curve and can run independently.

    skyking1DCContrarian
  • DCContrarian
    DCContrarian Member Posts: 1,123

    The only thing that's tricky is if you want to centrally control all of the FCU's. You want each FCU to be on its own thermostat, I'm not aware of a system that allows you to link 29 thermostats.

  • ratio
    ratio Member Posts: 3,991

    There's a number of hotel systems that should control a fan coil without problems. I installed Telkonet EcoSmart stats on a job in the past, they seemed to work fine & have as much remote monitoring & control as you could possibly want.

    https://telkonet.com/ecosystems/ecosmart/

    I also installed Honeywell Inncom thermostats, that experience was …less than enjoyable.

    bjohnhyskyking1
  • bmoon
    bmoon Member Posts: 7

    Thank you I'll check into the Telkonet!

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