Schneider Electric / Merten thermostat (MEG5779)

Hi, I am trying to get a Schneider Electric / Merten Raumtemperaturregler-Modul, polarweiss, System M, ZB MEG5779 running. Is there a quick way to get the basics (thermometer read-out, temperature set, and valve setting) of the thermostat working?
All the info I have uploaded on Github threads #7539, but unfortunately it has been closed.