24v thermostat to transformer/ZV - where does 3rd wire go?
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24v thermostat to transformer/ZV - where does 3rd wire go?
I'm installing several thermostats, transformers, and zone valves in a new propane boiler/hydronic baseboard system.
The wiring diagram ask for a third "common wire" if I want to eliminate batteries - something that would be preferred.
I cannot find diagrams that show connections at the zone valves/transformers with a 3rd wire from the thermostat. Where does it go?
The wiring diagram ask for a third "common wire" if I want to eliminate batteries - something that would be preferred.
I cannot find diagrams that show connections at the zone valves/transformers with a 3rd wire from the thermostat. Where does it go?
#2
Referring to your diagram...
The black wire to your stat is R.
The yellow wire between the stat and valve is W.
The yellow wire between the valve and transformer is C.
C is your third wire.
The black wire to your stat is R.
The yellow wire between the stat and valve is W.
The yellow wire between the valve and transformer is C.
C is your third wire.
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Thanks for the reply.
The diagram with yellow and red wires shows exactly 2 wires coming out of the thermostat - one black and one yellow. I have 3 wires coming out of each thermostat. Maybe I missed something on your explanation. Are you suggesting to add a wire in the diagram? If so, where?
Thanks.
The diagram with yellow and red wires shows exactly 2 wires coming out of the thermostat - one black and one yellow. I have 3 wires coming out of each thermostat. Maybe I missed something on your explanation. Are you suggesting to add a wire in the diagram? If so, where?
Thanks.
#4