Rcr10433 volt wire link l lx 230 volt switch live to boiler or valve note lx l1 l2 are volts free contacts.Ĭonfiguration instructions for the siemens rdj10rfset the transmitter rdj10rf room unit and the receiver rcr10433 are set to communicate bonded with each other at the factory. When i gave it hard bang the boiler licked in. It could be an internal fault but i would be checking the wiring connections first.Ĭheck wiring all electrical connections must comply with current regulations. The engineer replaced with a siemens unit above.