Danfoss ECL Comfort 296 Operating Manual

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Danfoss ECL Comfort 296 Operating Manual Manual pdf 6 page image

2.0 Installation2.1 Before you startTheapplicationA230isveryflexible. Thesearethebasicprinciples:Heating (application A230.1):Typically, the flow temperature is adjusted according to yourrequirements. The flow temperature sensor S3 is the mostimportant sensor. The desired flow temperature at S3 is calculatedin the ECL controller, based on the outdoor temperature (S1) andthe desired room temperature.The lower the outdoor temperature, the higher the desired flowtemperature.By means of a week schedule, the heating circuit can be in‘Comfort’ or ‘Saving’ mode. The week schedule can have up to 3‘Comfort’ periods / day. A value for the desired room temperaturecan be set in each of the modes.In Saving mode the heating can be reduced or switched off totally.The motorized control valve M1 is opened gradually when theflow temperature is lower than the desired flow temperature andvice versa.The return temperature S5 to the district heating supply should notbe too high. If so, the desired flow temperature can be adjusted(typically to a lower value), thus resulting in a gradual closing ofthemotorized control valve.In boiler-based heating supply the return temperature should notbe too low (same adjustment procedure as above).Furthermore, the return temperature limitation can be dependentof the outdoor temperature. Typically, the lower the outdoortemperature, the higher the accepted return temperature.Ifthemeasuredroomtemperature(directlyconnectedtemperaturesensor ESM-10 (S2) or Remote control unit ECA 30 / 31) does notequal the desired room temperature, the desired flow temperaturecan be adjusted.The circulation pump, P1, is ON at heat demand or at frostprotection.The heating can be switched OFF when the outdoor temperature ishigher than a selectable value.A connected flow or energy meter based on pulses (S7) can limitthe flow or energy to a set maximum value. Furthermore, thelimitation can be in relation to the outdoor temperature. Typically,the lower the outdoor temperature, the higher the accepted flow /power. When this subtype is used in an ECL Comfort 296 or 310 theflow / energy signal can alternatively come as an M-bus signal.Thefrostprotectionmodemaintainsaselectableflowtemperature,for example 10 °C.To compensate for the influence of wind, a wind speed sensor canbe connected. Based on the wind speed sensor signal (0 - 10 V), thecontroller can be set to increase the desired flow temperature inrelation to increased wind speed.Unusedinputscan, bymeansofanoverrideswitchorrelaycontact,be used for overriding the schedule to a fixed 'Comfort', 'Saving','Frost protection' or 'Constant temperature' mode.An alarm can be activated if the actual flow temperature differsfrom the desired flow temperature.Typical A230.1 application:Theshowndiagramisafundamentalandsimplifiedexampleanddoesnot contain all components that are necessary in a system.All named components are connected to the ECL Comfort controller.List of components:ECL 210 /296/310ElectroniccontrollerECLComfort210,296or310S1 OutdoortemperaturesensorS2 (Optional)Roomtemperaturesensor/ECA30S3 Flow temperature sensorS4 (Optional) Supply flow temperature sensor(read-out only)S5 (Optional)ReturntemperaturesensorS7 (Optional)Flow/energymeter(pulsesignal)S8 (Optional)WindspeedsensorP1 Circulation pump, heatingM1 Motorizedcontrolvalve,3-pointcontrolledAlternative 1: Control valve, thermo-actuatorcontrolled(DanfosstypeABV)Alternative 2 (ECL 310 with ECA 32): Motorizedcontrolvalve,0-10VoltcontrolledA1 AlarmThe A230.1 application can utilize a connected flow / energy meterto limit the flow / power.6 | © Danfoss | 2017.05 VI.LG.H4.02Operating Guide ECL Comfort 210/296/310, application A230