With this logic group, the solar surplus of a PV system can be used with the help of a heating cartridge in the hot water boiler (built-in heating cartridge with 3 identical heating rods) to save gas or oil, for example. The available surplus electricity is read out via the smart meter, for example.

There are two usage variants within the logic group. The first variant works with a dimmer ("switching" & "absolute dimming") and two further switching outputs to control the power continuously. In the second variant, the two-step switching is used if there is no dimmer and only the 2 switching outputs are used.

Klaus Hofmann
(209; 2022.04)