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On the left Plug - on the right Fan.
Thank you for the mass of questions and no answers. On the FIBARO forum, I drew an answer on my diagram after 5 minutes

3 minutes later, I had the connection ready as in the attached photo

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Mr sosarek, - "Apart from that, as I wrote earlier - with the fan as the load it may not be possible to calibrate the Dimmer.
" - Your advice, is worth as much as your doubts, which is NOTHING! The fan works very well, it has calibrated itself automatically - I have programmed it so that depending on the temperature it takes from the "smoke sensor", the speed changes

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Mr Christopher, the fan is built where you can see in the photograph

As I pointed out in the first post no switch/switch was to be mentioned (only Z-Wave control!) - that's why I asked for help.
I recommend you the FIBARO forum and the friendly and helpful community <3