RT520RF : Installation of the RXRT520 Receiver (1.3.1) . Note : This accessory must be fitted by a competent person, and installation must comply with the guidance provided in the current IEE Wiring Regulations and current Building Regulations. ...
RT520RF : Pairing with the RXRT520 Receiver (2.1.1) . Description : Pairing establishes a communications link between your Thermostat and the Receiver. If your thermostat is failing to control your boiler then your devices probably need pairing. ...