Servus,

I live in a 2.5 room rented flat with underfloor heating. I have 2 "wall switches with a wheel" to set the heat output. I regularly hear a click; I interpret this to mean that "heat" is then flowing or the flow is throttled.
In the flat itself, I have a wall box where the pipes run through and you can regulate the flow, for example, and there is also such a huge grey box with cables, etc. I can't see anything.

If I now want to install this Netatmo system...what goes where? The grey box can't be opened and I don't have a clue what it is.

I hope you understand my beginner questions...😁

Question

Servus,

I live in a 2.5 room rented flat with underfloor heating. I have 2 "wall switches with a wheel" to set the heat output. I regularly hear a click; I interpret this to mean that "heat" is then flowing or the flow is throttled.
In the flat itself, I have a wall box where the pipes run through and you can regulate the flow, for example, and there is also such a huge grey box with cables, etc. I can't see anything.

If I now want to install this Netatmo system...what goes where? The grey box can't be opened and I don't have a clue what it is.

I hope you understand my beginner questions...😁

Answer

I had the same questions once. 

In principle, the "wall switch with the wheel" is a combined thermostat and relay, which then controls the actuator (should be mounted in the wall box above the heat distributors). 

The NTH01-EN-EC now consists of two parts. The part where the temperature is measured and can also be set and then additionally the relay. Both communicate with Netatmo via radio. This has the advantage that you can place the thermometer where the heat is needed. You can then install the relay directly in the wall box and connect it to the actuator. You need a 230V power source here and with that you can connect both (actuator + relay) so that the relay only supplies the actuator with power in "On" mode.

I have integrated my bathroom in this way (initially I only had a manual rotary switch to open and close the water valve in the wall box). It works perfectly and since then it is never cold in the morning anymore :) In addition, the heating regulates the temperature at the place of the thermometer. Since it is mobile, you can decide flexibly where you want the heat.

If the temperature in the room falls below a defined limit, the thermometer sends a command to the relay, which then activates the actuator and extends it. As soon as the temperature is reached, the procedure is reversed (command is sent and actuator retracted).

Of course, any heating cycles and times can be set with the netatmo app.

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