MBS Receiver Cassette ( 1 per Heater )
The RX9913 can only be used in heaters and with a master heater fitted with the Mains Signalling Transmitter (Part No. RX9912).
They operate by receiving a high frequency signal from the master heater transmitter (RX9912).
During set up receivers are dedicated to only one transmitter so that they cannot be activated by
signals from any other transmitter unit.