While you wait for answers, we may have found some information which could help you.
Click here for Thermostat Heating CommunicationSiemans wireless heating controller battery usage?
How to use Siemens RWB7 central heating controller?
Thermostat issues- Siemens RDH10RF?
Siemens RDJ10RF thermostat problem?
Siemens brtrf keep LOSING connection?
my rdh10rf siemans thermostat will not send signal to my boiler. ?