Button functions and keysKey FunctionTurn on the LCD backlightTurn On/Off the Frost ModePress to increase setpoint temperature, press and holdto enter fast advance.Press to decrease setpoint temperature, press and holdto enter fast advance.1. Press once to enter/exit in RF Test Mode2. Press for 3 seconds to enter/exit Pairing ModeONAUTOOFFMANUALKey/LED FunctionAUTO System receiver output will switch on and off inrelation to the command from the RT310i transmitter.Manual System receiver output is controlled by the On/Offslide switch.ON When in Manual Mode, ON will turn on the boiler.OFF When in Manual Mode, OFF will turn off the boiler.Red Led Receiver On, paired.Green Led Command from thermostat received.There are few user controls for the RT310i, making this thermostat very easy to operate. These controls areshown below, along with a description of each of their functions. The temperature displayed on the LCD is thecurrent room temperature. All the buttons on the thermostat and receiver with a description are shown below.ThermostatReceiverRT310i Installation Manual 09