Heating controller complete with valve actuator (AC 220 V). Used with room unit (QAA40.1) and flow temperature sensor (QAD21) - No direct replacement. Replacement by the RVP201.0 controller is recommended plus a 
Key data to replacement product: room unit (QAW70). The existing QAD21 can be re-used if preferred. The RVP200 has additional features including weather compensation and 3-position control. 
Info: The controller must be wall or panel mounted and a 
Key data to replacement product: valve actuator must be provided (SAS31.00 + ASK30).