ST-20 Central Heating Pump Controllers

ST-20 regulator is intended for control of the pump of the central heating water circulation. The set temperature can be adjusted by using a potentiometer. The controller's task is to switch the pump on when the temperature reaches the set value and to switch the pump off when the boiler cools down 2°C below the set value. Such a functioning mode prevents unnecessary operation of the pump, which allows to save electric energy and prolongs life of the pump as well as improves its reliability.