Danfoss ECL Comfort 210 Installation Manual

Also see for ECL Comfort 210: Installation guide User guide Installation guide Operating guide Installation guide

Danfoss ECL Comfort 210 Installation Manual Manual pdf 68 page image

Installation Guide ECL Comfort 210 / 310, application A2605.7 Control parametersControl of valvesThe motorized control valves are controlled by means of 3-pointcontrol signal.Valve control:The motorized control valve is opened gradually when the flowtemperature is lower than the desired flow temperature and viceversa.The water flow through the control valve is managed by meansof an electric actuator. The combination "actuator" and "controlvalve" is also called motorized control valve. The actuator can inthis way gradually increase or decrease the flow in order to changethe supplied energy. Different types of actuators are available.3-point controlled actuator:The electric actuator contains a reversible gear-motor. Electric"open" and "close" signals come from the electronic outputs of theECL Comfort controller in order to manage the control valve. Thesignals are in the ECL Comfort controller expressed as "Arrow-up"(open)and"Arrow-down"(close)anddisplayedatthevalvesymbol.When the flow temperature (for example at S3) is lower than thedesired flow temperature, short open-signals come from the ECLComfort controller in order to gradually increase the flow. By this,the flow temperature will align with the desired temperature.Oppositely, when the flow temperature is higher than the desiredflow temperature, short close-signals come from the ECL Comfortcontroller in order to gradually reduce the flow. Again, the flowtemperature aligns with the desired temperature.Neither open-signals nor close-signals will come as long as the flowtemperature corresponds to the desired temperature.68 DEN-SMT/DK VI.LG.F2.02 Danfoss District Energy