Controlling a Z-Wave Radiator Thermostat with Valve Control and external Temperature Sensor (1-wire) #96
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Thanks for sharing, I've just got into the research phase for my setup, which is similar in a way, so hopefully some of this translates. I'm planning to use an esp pwm output via solid state relay to drive a 24v dc normally open thermal actuator. I've checked the spec sheet of the actuator, and with no power it should be sat fully open (equiv of a 5 setting on standard trv), and at 24v be at its maximum close position (equiv of a 1 setting on standard trv). It wont close any further than the equiv of a 1 setting on a standard trv, no ice/full off, but thats ok by me. |
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Hi @simonmarwitz , |
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First of all, thanks @ScratMan for the great work on HASmartThermostat 👏
My hot-water radiators are equipped with Z-Wave Thermostats that allow to direct control of the valve position (Eurotronic Comet Z-Wave). Their built-in thermostat controller works poorly; of course it only knows the temperature close to the radiator. But I have 1-wire temperature sensors in every room, to measure the real room temperature.
I came up with the following configuration, to use the Smart Thermostat for controlling the valves and I am very happy with the results. It took quite a while for me to have it working the way I want. Sharing my configuration here, for anyone that might be interested in doing something similar.
configuration.yaml
automations.yaml
Here you can see it in action
The target, vs. current temperature (Deviations in the morning hours are due to setting hvac_mode: 'off', which is not reflected in the target temperature):
![image](https://user-images.githubusercontent.com/25247720/207267053-dae54459-bdb5-4857-9cea-687f75eb9f9d.png)
![image](https://user-images.githubusercontent.com/25247720/207267111-09bbe8e1-735a-4cd9-ad4c-438340381c63.png)
The valve control of the radiator:
(I also created an open-window detection automation based on the room temperature measurements, that turns off thermostat control. If anyone is interested, I can also share it here.)
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