Dear Radnuss,

If you want to keep the air below 75°C than I would recommend the application A07 from the RLU220, RLU210 is no more in sale.
In the settings of the RLU, it's possible to set the setpoint to 75°C or more. Please set the setpoint cool night higher as the setpoint cool day, the setpoint night must be higher.

Send you as attachment the application sheet of the application A07,  the basic documentation and other document can be found in HIT. https://hit.sbt.siemens.com/

Hope this help

Best regards

RichardF