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How to wire zone controller with existing transformer relay
I'm having an issue with wiring my Weil McLain gas boiler. It was wired up fine and working for a single zone. I added (2) 4 wire zone valves in. So I now have 2 zones, a Taco zone valve controller(zvc-403), and two ecobee thermostats. And I have no idea how to wire it up.
I watched a video that showed me how to wire the valve controller. By wiring the circulator to the pump end switch and each of the thermostats to the proper zone and each zone valve to the proper zone on the board. That was pretty self-explanatory. But my question is: What happens to all the other connections on the boiler?? Like the water limiter and the gas wiring relays etc. I currently have a transformer relay with a lot of wiring connected to it - and no idea what to do with all those connections.
Do I just take the thermostat wires off the existing relay transformer and connect them in the controller and bring 120V to the controller to power it, and leave those connections powered with 120V to work completely on their own as long as it has power?
Or do I remove the thermostat wires from the existing relay transformer and bring the them to the controller, and remove the 120V power fro the existing relay transformer, and run the thermostat wires through the relay transformer as they were before? So no power in that relay transformer.
Or do i connect wire from the isolation end switch ti where the thermostat connections were made on the transformer relay
They completely left out what to do with all these other existing connections from the transformer relay. What about the gas igniter and the high water limiter etc. . Can anyone help with this? I have a decent idea of electrical work just never worked with HVAC and relays.