Hello.
I bought this thermostat and I can't figure out how to connect it. This thermostat has a relay with 3 pins: com, nc, and no in order to control the boiler. On my wall, I have 3 conductors, a grey one that seems to be the phase (I checked it with an electrical screwdriver) and bleu one (neutral), and a green-yellowish one that is the PE (when this PE is floating the electrical screwdriver shows current which is weird, maybe a grounding fault somewhere?).
After hours of searching and using chat-gpt, I found that I have to bridge the com and no pins connect the phase to the com pin, and leave the neutral and PE floating. I can't understand how this works...
From what I can see, the boiler turns on when the phase and the neutral (of the boiler) touch each other. So if the neutral is not connected to the relay, even when the relay is closed how does the current flow from the phase back to the boiler's neutral to turn it on?
By the way, the video from the link I showed you, tells you to connect the phase into the com and the PE to the no pin (the NC pin is left floating the same with the neutral conductor). Maybe this green-yellowish conductor is not the PE after all? Can someone explain to me how this connection works?
I bought this thermostat and I can't figure out how to connect it. This thermostat has a relay with 3 pins: com, nc, and no in order to control the boiler. On my wall, I have 3 conductors, a grey one that seems to be the phase (I checked it with an electrical screwdriver) and bleu one (neutral), and a green-yellowish one that is the PE (when this PE is floating the electrical screwdriver shows current which is weird, maybe a grounding fault somewhere?).
After hours of searching and using chat-gpt, I found that I have to bridge the com and no pins connect the phase to the com pin, and leave the neutral and PE floating. I can't understand how this works...
From what I can see, the boiler turns on when the phase and the neutral (of the boiler) touch each other. So if the neutral is not connected to the relay, even when the relay is closed how does the current flow from the phase back to the boiler's neutral to turn it on?
By the way, the video from the link I showed you, tells you to connect the phase into the com and the PE to the no pin (the NC pin is left floating the same with the neutral conductor). Maybe this green-yellowish conductor is not the PE after all? Can someone explain to me how this connection works?
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