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

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Installation Guide ECL Comfort 210 / 310, application A275 / A375 6.6 Control parameters Motor pr. (motor protection) 12174 Circuit Setting range Factory setting 2 OFF / 10 ... 59 m OFF Prevents the controller from unstable temperature control (and resulting actuator oscillations). This can occur at very low load. The motor protection increases the lifetime of all involved components. OFF: Motor protection is not activated. 10 ... 59: Motor protection is activated after the set activation delay (minutes). Xp (proportional band) 12184 Circuit Setting range Factory setting 2 5 ... 250 K 80 K Set the proportional band. A higher value will result in a stable but slow control of the flow temperature. Tn (integration time constant) 12185 Circuit Setting range Factory setting 2 1 ... 999 s 30 s Set a high integration time constant to obtain a slow but stable reaction to deviations. A low integration time constant (in seconds) will make the controller react fast but with less stability. M run (running time of the motorized control valve) 12186 Circuit Setting range Factory setting 2 5 ... 250 s 50 s ‘M run’ is the time in seconds it takes the controlled component to move from fully closed to fully open position. Set the ‘M run’ according to the examples or measure the running time by means of a stop watch. How to calculate the running time of a motorized control valve The running time of the motorized control valve is calculated using the following methods: Seated valves Running time = Valve stroke (mm) x actuator speed (sec. / mm) Example: 5.0 mm x 15 sec. / mm = 75 sec. Rotating valves Running time = Turning degrees x actuator speed (sec. / degr.) Example: 90 degr. x 2 sec. / degr. = 180 sec. 136 DEN-SMT/DK VI.GU.L1.02 Danfoss District Energy
Installation Guide ECL Comfort 210 / 310, application A275 / A375 Nz (neutral zone) 12187 Circuit Setting range Factory setting 2 1 ... 9 K 3 K Set the acceptable flow temperature deviation. Set the neutral zone to a high value if you can accept a high variation in flow temperature. When the actual flow temperature is within the neutral zone, the controller does not activate the motorized control valve. Min. act. time (min. activation time gear motor) 12189 Circuit Setting range Factory setting 2 2 ... 50 10 The min. pulse period of 20 ms (milliseconds ) for activation of the gear motor. The neutral zone is symmetrical around the desired flow temperature value, i.e. half the value is above and half the value is below this temperature. Setting example Value x 20 ms 2 40 ms 10 200 ms 50 1000 ms The setting should be kept as high as acceptable to increase the lifetime of the actuator (gear motor). Danfoss District Energy VI.GU.L1.02 DEN-SMT/DK 137
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