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Thermostat rotary switch berker 20308989, white, 250 V AC, 50–60 Hz
Rotary thermostat berker 20308989 in white is a mechanical control device designed for manual regulation of room temperature in heating and ventilation systems. The compact, wall-mountable design integrates a rotary switch that adjusts setpoint temperature and operates on standard AC mains voltage. Intended for indoor residential and light-commercial environments, this thermostat provides straightforward temperature control for single-zone heating circuits and fan/ventilation applications.
The mechanical rotary switch offers reliable, maintenance-free operation without the need for batteries or programming. Its white finish and discreet profile suit a range of interior styles and mounting locations. Rated for mains voltage and standard power frequency, the thermostat is compatible with common heating boiler and fan installations, providing direct and immediate feedback when adjusting the setpoint.
Install the thermostat on a standard wiring box following local electrical regulations and ensure power is disconnected before wiring. Connect the supply and load conductors according to the heating or ventilation circuit diagram provided by the installation manual. After restoring power, rotate the dial to select the desired room temperature; the internal mechanism will switch the output when the measured temperature crosses the setpoint. Regularly check wiring connections and housing for secure mounting.
Place the thermostat on an interior wall away from direct sunlight, drafts, or heat sources such as radiators to ensure accurate temperature sensing. For circuits with inductive loads, use appropriate contact protection or relays as required by the connected equipment and local electrical codes.
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