ECL Comfort 210/310, A275/A375 Installation Guide - Danfoss ...

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Installation Guide ECL Comfort 210 / 310, application A275 / A375 The ID no. is unique for the selected parameter. Example First digit Second digit Last three digits 11174 1 1 174 - Circuit 1 Parameter no. 12174 1 2 174 - Circuit 2 Parameter no. If an ID description is mentioned more than once, it means that there are special settings for one or more system types. It will be marked with the system type in question (e.g. 12174 - A266.9). Disposal Note This product should be dismantled and its components sorted, if possible, in various groups before recycling or disposal. Always follow the local disposal regulations. 4 DEN-SMT/DK VI.GU.L1.02 Danfoss District Energy
Installation Guide ECL Comfort 210 / 310, application A275 / A375 2.0 Installation 2.1 Before you start The application A275.1 is very flexible. These are the basic principles: Heating (circuit 1): Typically, the boiler temperature is adjusted according to your requirements. The boiler temperature sensor S3 is the most important sensor. It must be placed correctly in order to measure the boiler temperature. The desired boiler temperature at S3 is calculated in the ECL controller, based on the outdoor temperature (S1). The lower the outdoor temperature, the higher the desired boiler temperature. The boiler temperature is also the flow temperature in the direct connected heating circuit. By means of a week schedule (up to 3 ‘Comfort’ periods / day), the heating circuit can be in ‘Comfort’ or ‘Saving’ mode (two different temperature values for the desired room temperature). In 'Saving' mode a 'Total stop' function can be selected in order to switch OFF the heating. The burner is switched ON when the boiler temperature is lower than the desired boiler temperature and switched OFF when the boiler temperature is higher than the desired boiler temperature. A switching difference determines the ON / OFF control. Furthermore, the boiler protection function will only switch ON the circulation pump if the boiler temperature gets above a minimum temperature. A minimum ON-time can be set for the burner in order to increase the boiler's efficiency. The return temperature (S5) to the boiler should not be too high (condensing boiler) or too low (oil or gas fired boiler). If so, the desired boiler temperature can be decreased or increased. Furthermore, the return temperature limitation can be dependent of the outdoor temperature. Typically, the lower the outdoor temperature, the higher the accepted return temperature. If the measured room temperature (measured by S7 or the remote control unit ECA 30) does not equal the desired room temperature, the desired boiler temperature can be adjusted. The circulation pump (P1) is ON at heat demand or at frost protection. The heating can be switched OFF if the outdoor temperature gets higher than a set value. Typical A275.1 application: S1 B1 S3 S5 * Pressure relief valve P1 ECL 210 / (310) * The shown diagram is a fundamental and simplified example and does not 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 sensor S3 Boiler temperature sensor S5 Return temperature sensor S7 Room temperature sensor / ECA 30 P1 Circulation pump B1 Burner A1 Alarm The controller is pre-programmed with factory settings that are shown in the relevant chapters of this guide. Danfoss District Energy VI.GU.L1.02 DEN-SMT/DK 5 A1 S7 ① Danfoss 87H2163.10
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