Danfoss ECL 2000, User Manual

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Service Settings
EY.65.H4.02
45
10.2.2 Pump/Valve Settings
This section describes the parameters you can set in pictures under the Pump/valve
menu item.
Pump The following parameters can be set for pump operation:
Display text Parameter Default value,
range Description
Overrun Pump overrun
period Default value:
3 min.
Range:
0-30 min.
The number of minutes the pump will
continue to run after the calculated flow
temperature setpoint has dropped below
20 °C. After this, the pump will be
stopped
Exercise Pump exercise Default value:
ON
Range:
ON, OFF
When the pump has been stopped for 72
hours, pump exercise will take place,
provided that this parameter is ON. This
means that at 12:00 (noon), the pump
will be started and run for 1 minute
Night stop Default value:
OFF
Range:
ON, OFF
During the night setback period, it is
generally desirable to stop the pump, or
at least reduce the number of revolutions.
When a normal pump is used, the pa-
rameter is set to OFF. In this case, the
controller stops the pump when the cal-
culated flow temperature drops below
20 °C.
The ON setting is used for pumps with
control of the differential pressure across
the pump. This type of pump has a sepa-
rate input that can be used to instruct the
pump to reduce its number of revolu-
tions.
When the Night stop parameter is set to
ON, the ECL 2000 sends a STOP signal
to the pump as soon as a night setback
period starts, thus causing the pump to
reduce its number of revolutions, re-
gardless of other pump control criteria.
For further information about the con-
nection and use of this type of pump, see
the ECL 2000 Technical Manual
(ref. [3])
Motor valve The following parameters can be set for the motor valve in the heat circuit:
Display text Parameter Default value,
range Description
Stroke Default value:
16 mm
Range:
1-50 mm
Stroke of the valve motor