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changing zone controllers

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northernlights
northernlights Member Posts: 2
in Radiant Heating

Hey guys!

New to the forums and looking for some advice on my hydonics system. I currently have a 3 zone system, zone 1 is domestic, zone 2 and 3 are in floor zones. This is all controlled by an ilink Sp83 controller to a Visemann Boiler and 4 Grundfos pumps.

See diagram below for the wiring of the ilink controller and where I propose to move the wiring on the new controller. I want to move away from the ilink controller (https://azeltec.com/images/ilinkinstructionplus.pdf) to an HBX ZON0600 controller (https://admin.hbxcontrols.com/assets/Uploads/resources/ZON-0600-Manual-1.0.1.pdf) and I'm trying to get my head around the wiring.

In particular a couple of issues I see are:

  1. The current setup uses a Honeywell L6006 Aquastat on the tank wired to zone 1 of the ilink. The ZON0600 does not allow for an aquastat so I am wondering if I can use a thermistor instead to monitor tank temp and feed that to the aux input on the ZON0600 to call for heat.
  2. There is a system circulator option on the ilink which provides 120v to a Grundfos pump. I can't see where to get that from the ZON0600.

Thanks.

NL

hydronics_controller.jpg

Comments

  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,668

    Your aquastat is just like a thermostat and normally, you connect these to TT on the zone control. But your control says: "The THM-0600 is the only approved thermostat to be used with the ZON-0600. Do not supply external power to the thermostat." So, I don't know if an aquastat will work with that control.

    Your system pump would be wired to one of the two "Pump Outputs".

    Why don't you go with a Taco or Caleffi pump or zone valve control. It seems less complicated and has DHW priority.

    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • northernlights
    northernlights Member Posts: 2

    thx for the feedback. I'll take a look at the brands you mention. I was going with HBX as they are local to me and their controllers support wifi connections via their app. I didn't think an aquastat would work which is why I was considering using a thermistor to the aux output.

  • hot_rod
    hot_rod Member Posts: 27,116

    It is not real clear if the DHW connection MUST be a thermistor or if an aquastat could be connected. Do they offer the thermistor for the DHW?

    The local rep or HBX directly should be able to help you.

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream

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