over/under temperature protection class 3.3 according to DIN 12880

Over/under temperature protection class 3.3 to DIN 12880 is a standard function for the KK, ST PREM Smart PRO and IL in the Smart PRO version. It is an additional option for ST BASIC, COMF, PREM and IL in the Smart version.
Order number: */3.3 (option factory preinstalled).
It features a sample protection function: the User can set the over/under protection temperature and once it has been exceeded, the program will cut off the heaters or compressor. When the temperature goes back to the permitted range, the unit will resume operating automatically.