As a wired digital, programmable room thermostat with a clock, the flush-mounted room temperature controllers are directly wired to a heating element and can be adapted separately as a standalone device or via intermediate frames according to DIN 49075 to nearly all surface-mounted switch systems. With an intermediate frame obtained from your switch manufacturer, you can easily integrate the room thermostat into an existing light switch program. A standard frame is included in the delivery. The digital weekly clock features programs for switching between comfort and setback temperatures. The controller is pre-set for normal daily routines. Temperature setting in 0.5 K increments. Sensor tolerance: 0.5 K. Switching differential: approx. K. Operating voltage 230 VAC, power consumption: approx. W. Heating contact: normally closed max. 230 VAC, A. Protection class: II after appropriate installation. Ambient temperature: 0-30 °C. Storage temperature: -20-70 °C. Radio interference suppression: according to EN 50081-1, EN 50082-1. Backup time: days, after h operating time. Valve protection: at least one week. Comes with installation instructions. Operating modes: Automatic, Comfort, Economy, Party, Vacation, Frost Protection, Off. Weekly clock with individually adjustable daily routines. Display: illuminated graphic display. If the installed power exceeds the specified switching power of the respective room thermostat, the heating elements must be switched via additional load relays type LS-E. In any case, the lifespan of the room thermostat is extended if an additional load relay switches the load. VT D-UP.