MENU > Settings > Boiler
M run (running time of the motorized control valve)
1x186
‘M run’ is the time in seconds it takes the controlled component to move
from fully closed to fully open position.
See Appendix “Parameter ID overview”
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.
MENU > Settings > Boiler
Nz (neutral zone)
1x187
When the actual flow / duct temperature is within the neutral zone, the
controller does not activate the motorized control valve.
See Appendix “Parameter ID overview”
Set the acceptable flow /duct temperature deviation.
Set the neutral zone to a high value if you can accept a high
variation in flow temperature.
The neutral zone is symmetrical around the desired flow / duct
temperature value, i.e. half the value is above and half the value is
below this temperature.
MENU > Settings > Boiler
Min. act. time (min. activation time gear motor)
1x189
The min. pulse period of 20 ms (milliseconds ) for activation of the gear
motor.
See Appendix “Parameter ID overview”
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).
MENU > Settings > Boiler
Control, delay
1x364
See Appendix “Parameter ID overview”
MENU > Settings > Boiler
Min. off time
1x424
See Appendix “Parameter ID overview”
VI.GU.L2.02
© Danfoss | 2017.09 | 133
Operating Guide ECL Comfort 210/296/310, application A275/A375
