Controller with ET-OLED user interface

The controller shows the inlet and outlet water temperatures, the heat output in kW from the heat exchanger and the energy in kWh. When water is consumed or the temperature has started to rise, the controller continuously searches for the operating point corresponding to the maximum output of the heat exchanger, controlling the filling of the exhaust air valve. If no water is consumed and the leaving water temperature drops, the choke is emptied regularly to prevent clogging. In addition, the operation of the controller requires the installation of a water meter with a pulse counter (10 l / imp).