Ok i just tried the method posted above (using latest config files from github) and after removing and readding the thermostat it now shows up as 3 devices and is now completely configureable.
Thanks for the link, that explains the heating modes. But now im wondering why this thing shows up as the different thermostats ( furnace, head and heat eco). I thought those were modes, why also seperate devices? 
guess i have to read a bit more.