Danfoss ECL Comfort 210 Operating Manual

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Danfoss ECL Comfort 210 Operating Manual Manual pdf 5 page image

2.0 Installation2.1 Before you startThe two applications, A217.1 / A317.1 are almost identical.However, A317.1 has some extra functions which are describedseparately.The applications A217.1 / A317.1 are very flexible. These are thebasic principles:Domestic Hot Water (DHW):By means of a week schedule (up to 3 ‘Comfort’ periods / day), theDHW circuit can be in ‘Comfort’ or ‘Saving’ mode (two differenttemperature values for the desired DHW temperature at S6).The heating / charging temperature sensor S3 is the mostimportant sensor.If the measured DHW temperature (S6) gets lower than the desiredDHW temperature, the DHW heating / charging pump (P1) isswitched ON.The motorized control valve (M1) is controlled in order to maintainthe heating / charging temperature at S3. This temperature istypically 5–10 degrees higher than the desired DHW temperature.A max. value can be set.DHW tank with 1 temperature sensor (S6):If the measured DHW temperature (S6) gets higher than thedesired DHW temperature, the DHW heating / charging pump (P1)is switched OFF. The post-run time can be set.DHW tank with 2 temperature sensors (S6 and S8):IfthemeasuredDHWtemperature(S6)getshigherthanthedesiredDHW temperature and the lower temperature (at S8) gets higherthan the cut-out temperature, the DHW heating / charging pump(P1) is switched OFF. The post-run time can be set.In charging applications the DHW circulation can be throughthe DHW tank (connection A) or through the heat-exchanger(connection B).The solution with connection A results in closing of the motorizedcontrol valve after the DHW tank charging procedure.The solution with connection B is used to compensate for theheat loss in the DHW circulation pipe. Furthermore, after DHWtank charging, the circulation temperature (at S3) is controlledaccording to the desired DHW temperature.The return temperature (S5) to the district heating supply shouldnot be too high. If so, the desired charging temperature can beadjusted (typically to a lower value), thus resulting in a gradualclosing of the motorized control valve.In boiler-based heating supply the return temperature should notbe too low (same adjustment procedure as above).The supply temperature, S2, is used for adjusting the proportionalband (Xp) in order to give a stable temperature control.An anti-bacteria function is available for activation on selecteddays of the week.The outdoor temperature sensor S1 is used to protect thecirculation circuit against frost.The DHW circulation pump (P3) has a week schedule for up to 3ON-periods per day.Typical A217.1. / A317.1 application:Theshowndiagramisafundamentalandsimplifiedexampleanddoesnot contain all components that are necessary in a system.All named components are connected to the ECL Comfort controller.List of components:S1 Outdoor temperature sensorS2 Supply temperature sensorS3 Charging temperature sensorS5 Return temperature sensorS6 DHWtanktemperaturesensor, upperS8 DHWtanktemperaturesensor, lowerP1 DHWchargingpump(DHWheatingpump)P3 DHW circulation pumpM1 Motorized control valveA1 Relay output, alarmVI.LG.U3.02 © Danfoss | 2018.03 | 5Operating Guide ECL Comfort 210/296/310, application A217/A317