Analogue heating controller (AC 220 V) for flow temperature and boiler control (heat pump option). Direct replacement by digital unit RVP350, which has the same dimensions and/or panel cut-out. QAA32.2 room unit must be replaced (by QAA50.110/101), 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).