OK, I'm confused ... let's see if we can clear this up.
Original system had only 1 zone. Controlled by a 2 wire thermostat, connected directly to the boiler.
You created a new zone, and installed a W-R 3 wire zone valve on each zone.
I think you are saying that you want to use the existing 2 wire thermostat to run a W-R valve ... you can't ... those valves require a 3 wire thermostat. Quote:
| The diagram shows 2 wires from the t-stat what do I do with the 3rd wire? |
Which diagram shows a 2 wire thermostat ? I don't see that. All the diagrams that I see show 3 wire thermostats.
One thing to keep in mind when looking at the wiring diagrams is the fact that terminals 2 and 5 on the zone valves is electrically the same point.
The reason their diagrams show T1 and T2 is because they are showing the designators on their own brand of relays, not Honeywell's ...
There will be only TWO wires coming from the zone valves going to the TT terminals on the control at the boiler.
I believe this will work:
