The system has the possibility to define 8 (0-7) pump groups. Each pump group has a list of outputs. These outputs can for example be the list of heating valves from the first floor of a house. To each pump group an output called “pump output” is linked. When at least 1 output of the pump group is activated, the pump output will be on. When all outputs of a pump group are off, the pump output will also be off. Each pump group can have a maximum of 32 (0-31) outputs.