RT520RF : What’s in the Box (1.1.1) . Thermostat : The RT520RF room thermostat simply switches the heating system on and off as necessary. It works by sensing the air temperature, switching on the heating when the air temperature falls below the ...
RXRT520 : Receiver Controls (1.3.3) . Description : Your thermostat communicates wirelessly with the RXRT520 Receiver. It is the switching part of your heating system. Wired directly to your boiler, pump and control valves the receiver controls ...