I recently decided to modernize my radiant floor heating system, and I’m really excited about integrating it with smart home technology. My setup includes a Wilo circulation pump with three stages, five Heimeier NC thermostatic valves, and Eberle room thermostats with bimetallic switches. I’ve been exploring how to connect these components with a Shelly Pro 3 to automate the heating process, but I’ve hit a few roadblocks along the way.
One of the main challenges I’m facing is understanding how to properly wire the thermostatic valves with the Shelly. From what I gather, the valves currently hang between the neutral (N) and live (L) wires, but I’m not entirely sure how to configure them to work seamlessly with the Shelly. The Eberle thermostats provide an output that seems to involve both live and neutral potentials, which adds another layer of complexity. I’ve considered a few options, like removing the neutral connection from the thermostats or adjusting the wiring to accommodate the Shelly, but I’m worried about the potential consequences of these changes.
I’ve also been experimenting with the resistance settings on the thermostats. I suspect that the resistance might be affecting the hysteresis of the bimetallic switch, but I’m not entirely sure how to test this without risking damage to the components. It’s a bit overwhelming, but I’m determined to figure this out. If anyone has experience with similar setups or can offer some guidance, I’d greatly appreciate it!
In the meantime, I’m leaning towards removing the neutral connection from the thermostats to simplify the wiring. I believe this could make the system safer and easier to manage, but I’ll need to test this approach carefully to ensure it doesn’t disrupt the functionality of the heating system. I’m also considering using external sensors to fine-tune the hysteresis, which would allow me to optimize the system’s performance over time.
This project has been a fascinating learning experience, and I’m excited to see how it turns out. If anyone has successfully integrated a similar setup or has any tips to share, please don’t hesitate to reach out! I’m eager to hear your thoughts and insights.
Cheers,
Gam