Heating controller (AC 230 V). 100% replacement by RVP340 with additional functions which has the same dimensions and panel cut-out. Existing sensors, room units and valve actuators can be re-used. For the replacement with a RVP340 the terminal base must be replaced as well, because the positioning of the inputs B5, B7, H1 and the outputs F1/F2, Y1, Y2, F7, Q2 and K6 has been changed.