EU-21R Regulator for UT pumps

EU-21R Regulator for UT pumps

The EU-21 regulation with LED display is intended for controlling the central heating (DH) circulation pump. The task of the regulation is to turn on the DHW pump when the temperature reaches the set value and turn it off when the boiler temperature drops below the set value by the set hysteresis value. This mode of operation prevents unnecessary operation of the pump, thereby saving electrical energy, extending the life of the pump and increasing its reliability. The regulation can also work as a thermostat, which turns off the pump after reaching the specified temperature. The EU-21 regulation has an ANTISTOP function that protects the circulation pump against freezing outside the heating season (the pump is switched on approximately every 10 days for 1 minute). An additional function of the regulation is the protection of the pump against freezing of water in the system. When the water temperature drops below 6°C, the pump turns on and works continuously.

Functions performed by regulation:

• UT pump control
• the possibility of operation as a thermostat
• ANTISTOP function
• anti-freeze function
• voltage-free output - EU-21R version only

Control equipment:

• CU temperature sensor
• LED display