I have a Taco model 572 valve connected to an existing wired Honeywell TH8110 thermostat for my oil fueled radiator system. I'm getting a new Honeywell TH6320 wireless thermostat for a new A/C installation and I would like to know if there is equipment available that would allow me to connect the wireless thermostat to the Taco valve. The Taco valve is currently connected to a Honeywell control board.

  • Have you tired contacting Honeywell? Their customer support is top notch.
    – Tester101
    Jul 28, 2014 at 11:05
  • I've contacted taco, I will try Honeywell and see what they tell me. Thank you. Jul 29, 2014 at 12:26

1 Answer 1


This turned out to be much easier than I expected. The EIM that had been setup for A/C only had the R Rc Rh terminals connected by jumpers.

  • I removed the jumper on the Rh terminal because the heating system had it's own 24V power.
  • I replaced the wire that was coming from the old wired thermostat with a new one that I connected to the Rh terminal and W terminal on the EIM.

The thermostat had already been connected to the EIM so these steps were all it took.

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