System 3000 Room Temperature Controller BT in matte gray (painted) for System 55. Operation and programming via a mobile device (smartphone or tablet) via Bluetooth with the Gira System 3000 app. Control is done through a capacitive sensor surface.

Manual and time-controlled regulation of room temperature is possible. Functions on the attachment: Current time can be stored as a switching time, quick programming, automatic summer/winter time adjustment (can be disabled), timer with three memory areas for comfort and setback times for Mon-Fri as well as Sat+Sun.

Settings for comfort, setback, cooling, and frost protection temperatures. Controller output: Pulse width modulation (PWM) or 2-point control. Heating optimization (temperature is reached at the set time). Adaptation to valves (normally open or normally closed). Activation of cooling operation via the application. Support for internal and external temperature sensors as well as temperature drop detection. Operating lock and valve protection function are also included. The display turns off after 2 minutes, but a permanent display of the current time is possible.

Functions with the Gira System 3000 app: Weekly timer with 40 individually programmable switching points and temperatures, vacation mode (start, end, temperature), boost function for quick heating (max. 5 minutes), lock of local operation, integration of an external temperature sensor via Bluetooth, adjustable minimum and maximum temperature values, as well as copying settings and time programs to additional attachments. The combination of attachment 5393xx with 540700 is only possible from I05 (index) onwards. When connected to the Gira System 3000 app, the time and date are updated.