Viessmann Vitodens 222-W WS2A + Vitotrol 300 thermostat and Vitotronic 200 exterior sensor + Tado X?

DinaZ

Hello, can anyone suggest a technician in Brussels area who is familiar and able to remove the Vitotrol 300 wired thermostat (not compatible with TadoX) and connect/wire the Tado X wireless receiver to our boiler? We have had no luck so far, 2 technicians could not do it, there seems to be an issue due to the exterior sensor… Or anyone with the same boiler maybe can post the pictures of the tado x (not V3) receiver correct wiring to the type of boiler we have? App recognized the receiver but gave an error message and the heating on demand did not start.