Any idea how to set Tempearature on a zwave (Eurotronics Spirit) Thermostat?

Hi All,
i try to set up a automation when a Window contact state is “OPEN” to set the temperature of the zwave Heating Thermostat to eg 8 degrees Celsius. In the filed of ACTION i do not find a appropriate topic to set the temperature. I tried Set Valve Control but this is not the Temp adjustment. When I choose “Set a zwave command” then I tried Multilevel Switch as Command class but also does not work when I set the Value to 8. Any idea what kind of class I have to select to control the Temperature on a zwave heating Thermostat?

Thank you,
Dirk