Analogue weather-compensated heating controller (AC 220 V). 100 % replacement by RVP201.1, same dimensions and/or panel cut-out. Room unit (QAA32.2) must be replaced (by QAA50.110/101) - all other sensors and valve actuator can be re-used. 
Info: Do not use the existing base as terminals are different - the 
Key data to replacement product: unit must be rewired (see Data Sheet).