For the heating engineerInstallation instructionsVRT 392VRT 392Room thermostat and hot water programmerContents1 Notes on the documentation .........................21.1 Cylinder of the documents ...................................21.2 Symbols used ...........................................................21.3 Validity of the instructions ...................................22 Description of the device ............................... 32.1 Identification plate ..................................................32.2 CE label ......................................................................32.3 Intended use .............................................................33 Safety instructions and regulations ............43.1 Safety instruction....................................................43.2 Regulations ...............................................................44 Assembly .........................................................44.1 Scope of delivery.....................................................44.2 Accessories ...............................................................44.3 Installation location ................................................44.4 Wall-mounting ..........................................................55 Installation ....................................................... 56 Initial commissioning ..................................... 66.1 Installation assistant ..............................................66.2 Operation level for the installer ..........................66.3 Resetting the parameters to thefactory setting..........................................................76.4 Handing over the device to the user ..................77 Service, Warranty ........................................... 98 Recycling and disposal ................................... 99 Technical data ................................................. 9Glossary ........................................................ Appendix