I have to change our sauna heater. The current heater has wires connected to Earth, N and L3.
I'm confused by the manual of the new heater as there is only 1 X N wire but the manual seems to suggest that there should be 2 (unless I've misread it).
The shop said that the wiring would be the same.
The new heater model is numbered 1 - 7 so it's the top diagram that seems relevant.