10. Pairing your RXWBC60510. User controls for your RXWBC60526 iT500BM Installer Manual5 When the RXWBC605 Receiver and the iT500Thermostat have paired then the LED on theRXWBC605 will go out. Press OR toreturn to the home screen.iUSER CONTROLSIntegral RF Boiler ControlA. LED - This LED will be on whenthe thermostat is demanding heat.B. Mode Switch ON – Boiler will be oncontinuous AUTO – will follow timeand temperature program in thetransmitter OFF – Boiler is off.C. SYNC Button - This is used only forpairing the RF communications.6