Oh, the installation was not a problem. The AEG induction hob is connected to only 2 phases, for all technically interested.
The only negative that is leading to a star deduction that the timer switches off the hobs with the ringing.
I would have liked that you can decide this depending on the case itself.
I sit like a timer to control the cooking process to me.
So I have to after each ringing, adjust the heat setting again.
Not a big problem, but an unnecessary nuisance.