• The wires of the measuring circuits carry extra low voltage• The wires to the actuator and the pumps carry AC 24…230 V• The local regulations for electrical installations must be complied with• Sensor cables may not be run parallel to mains carrying cables for loads such as actuators and pumps (safety class II to EN 60730)• In control systems using a room sensor, the reference room may not be equipped with thermostatic radiator valves. Manual valves must be locked in their fully open position• Local regulations as well as requirements of the district heat supplier when using the refill function must be complied with