RT520 Series Boiler Plus Compliant Thermostat | 1.5.1 Pairing With The Wall Mounted Receiver

1.5.1 Pairing with the wall mounted Receiver
RT520RF - Pairing with the RXRT520 Receiver
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. ...

RT520 Series Boiler Plus Compliant Thermostat | 1.5.1 Pairing With The Wall Mounted Receiver | Help Center