ECL Comfort 210/310, A217/A317 Installation Guide - Danfoss ...

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Installation Guide ECL Comfort 210 / 310, application A217 / A317 Close time - A217.3 11095 Circuit Setting range Factory setting 1 OFF / 0.1 ... 25.0 s OFF Commands the actuator to close the valve for the set period when a DHW tapping / DHW draw-off stops. When no DHW tapping / DHW draw-off is present, the flow switch (S8) is deactivated. OFF: Commanded closing time is 0 (zero) sec. 0.1 .... 25.0 s: Commanded closing time. 84 DEN-SMT/DK VI.LG.U2.02 Danfoss District Energy
Installation Guide ECL Comfort 210 / 310, application A217 / A317 If you want to tune the PI regulation precisely, you can use the following method: • Set the ‘Tn’ (integration time constant) to its max. value (999 sec.). • Decrease the value for the ‘Xp’ (proportional band) until the system starts hunting (i.e. gets unstable) with a constant amplitude (it might be necessary to force the system by setting an extreme low value). • Find the critical time period on the temperature recorder or use a stop watch. Temp. Critical time period Time This critical time period will be characteristic for the system, and you can evaluate the settings from this critical period. ‘Tn’ = 0.85 x critical time period ‘Xp’ = 2.2 x proportional band value in the critical time period If the regulation seems to be too slow, you can decrease the proportional band value by 10%. Make sure there is a consumption when you set the parameters. Danfoss District Energy VI.LG.U2.02 DEN-SMT/DK 85
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ECL Comfort 210/310, A217/A317 Installation Guide - Danfoss ...

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