Heating/Cooling, 2- and 4-pipe, continuously variable, with LCD operating menu and integrated timer program, heating/cooling changeover by means of external potential-free contact (low voltage), 24 V Actuator, Open/Closed, 1 W, flush-mounted, Protection class IP 30, Colour similar to RAL 9010 pure white, Type 30456 Suitable for: EC units, electromechanical 24 V/230 V, 5 Katherm HK, Katherm HK 320 E, Katherm QK or Katherm QK nano Trench Technology, 5 PowerKon nano Perimeter Heating