The controller prevents unnecessary pump operation and unwanted cooling of the tank when the supply temperature drops. In this way, the CWU pump controller saves electricity and extends the life of the pump. The EU-21 CWU regulator is equipped with a system preventing the pump from stagnating during a longer standstill. Every 10 days, the pump is turned on for 1 minute.
CWU controller - effective frost protection
An additional function is protection of the installation against freezing. After the temperature at the boiler or tank sensor drops below 6 ° C, the pump is turned on permanently. It will be turned off when the temperature in the circuit reaches 7 ° C.
Operation of the ST-21 CWU regulator
The CWU pump controller ST-21 CWU is a device on which the sensor temperature view can be changed by pressing the MINUS (boiler water temperature) and PLUS (boiler feedwater temperature) buttons. The main menu of the domestic hot water pump controller includes such functions as: manual operation, pump activation delta, activation threshold, deactivation threshold and factory settings.
CWU controller - installation
Installation of the device should be performed only by a person with appropriate experience and appropriate authorizations. The sensor of the domestic hot water pump controller should be fixed with a clamp and insulated from external factors with an insulating tape.
Functions performed by the CWU controller:
- pump control
- anti-stop function
- anti-freeze function
- voltage-free output control
Equipment of the domestic hot water pump controller:
- LED display
- two temperature sensors
This product was added to our catalog on Wednesday 09 February, 2022.
