5 Operating and display functions20 Operating instructions VRT 350 0020135485_005.2.2 Setting timer programs5.2.2.1 Showing time periods for one day06:00 18:0008:00 16:30 22:3016 °21 °TemperatureTimeDesirednighttemperaturePeriod 1Desireddaytemperature20:00DesireddaytemperaturePeriod 2Period 3DesireddaytemperatureDesired night temperatureDesirednighttemperatureDesirednighttemperatureImage 5.1: Example: Three time periods in one dayThe «Time programmes» function can be used to set the time period for the heating circuit and hot water generation.If you have not set any time periods, the controller uses the time periods set in the factory settings.