Thermostat rotary switch Berker 20268989, white, AC 250 V, 50–60 Hz

Rotary thermostat Berker 20268989 in white is a mechanical temperature control device designed for wall-mounted HVAC and heating circuits. The compact rotary switch allows manual adjustment of room temperature setpoints and provides on/off or switching control for connected heating loads. Rated for use with AC 250 V supply and compatible with 50–60 Hz systems, this thermostat integrates into residential or light-commercial installations where straightforward, reliable temperature control is required.

Advantages

The rotary design offers simple, tactile operation without the need for programming, making it easy to set and change temperature targets. Its standardized electrical rating (AC 250 V, 50–60 Hz) ensures compatibility with common mains supplies. The white finish provides a neutral appearance that fits typical interiors, while the compact form factor minimizes space requirements on standard wall boxes. Mechanical actuation reduces electronic complexity and supports straightforward diagnostics and maintenance.

Suitable for

• Room temperature control in residential apartments and houses
• Heating circuits and convector or radiator control
• Light-commercial spaces such as offices or meeting rooms
• Replacement or retrofit installations where simple manual control is needed

Key specifications

• Type: mechanical rotary thermostat for wall mounting
• Color: white finish
• Supply voltage rating: AC 250 V
• Frequency compatibility: 50–60 Hz
• Control: manual setpoint adjustment via rotary knob
• Application: HVAC and heating load switching

How to use

Install the thermostat on a suitable wall box following local electrical codes and wiring guidelines. Connect the thermostat in series with the heating actuator or load according to the installation diagram provided by the system manufacturer. Rotate the knob to select the desired temperature setpoint; the internal mechanism will switch the connected heating circuit when the ambient temperature crosses the setpoint. No programming is required; adjustment is immediate and mechanical.

Usage recommendations

Mount the thermostat away from direct sunlight, drafts, or heat sources to ensure accurate temperature sensing. Verify that the connected load and wiring meet the devices voltage and frequency ratings. For installations in larger or zoned systems, use this thermostat to control individual rooms or zones and combine with centralized control where precise scheduling or remote control is needed.