TECH-CONTROLLERS WG.14.0110 Controller for pump ST-21 TECH Controllers

The ST-21 Pump Controller by TECH-STEROWNIKI (Product Code: WG.14.0110) is an advanced device designed for controlling the circulation pump in central heating systems. This controller is engineered to activate the pump when the water temperature reaches the set value and deactivate it when the temperature falls below the desired threshold, taking into account a defined hysteresis range of 1 to 10°C. This intelligent operation not only conserves electrical energy but also extends the lifespan of the pump, ensuring reliable performance throughout its use.

Equipped with a LED display, the ST-21 serves not only as a pump controller but can also function as a thermostat, providing versatile heating management. Key features include the ANTYSTOP function, which prevents the pump from seizing during off-seasons by activating it every 10 days for one minute, and an anti-freeze function that ensures the pump operates continuously when temperatures drop below 6°C. These functionalities make the ST-21 a robust solution for maintaining optimal conditions in your heating system.

Technical specifications of the ST-21 include a power supply of 230 V, 50 Hz, a maximum power consumption of 2 W, and a temperature range for operation from +5 to +50 °C. The controller supports a maximum load of 1 A at the pump output and features a temperature sensor with a durability range of -25 to +90 °C. With a measurement accuracy of 1°C and a sensor cable length of 1.5 m, the ST-21 is designed for efficiency and reliability in heating applications.