Danfoss ECL 2000, User Manual

Page: 52 / 106

Service Settings
EY.65.H4.02
46
Display text Parameter Default value,
range Description
Run time
1 mm
Running time
1 mm Default value:
8 seconds
Range:
1-99 seconds
The time required for the spindle of the
motor valve to move 1 mm
Exercise Valve exercise Default value:
OFF
Range:
ON, OFF
When the valve motor has not been run-
ning for 72 hours, valve exercise will
take place, provided that this parameter
is ON. This means that at 12:00 (noon),
the gear motor will be started and the
valve will be activated for 3 minutes in
the opening direction and 3 minutes in
the closing direction
Flow cut-off Depending on the type of ECL 2000 and the type of application you have selected, it
is possible to customize 1 or more sensor inputs (see page 27). If one of these inputs is
used to measure the water flow, the controller can be set up to close the valve if the
flow in the system falls below a user-defined limit.
The following settings are related to flow cut-off caused by measured flow data:
Display text Parameter Default value,
range Description
Cut-off time
Default value:
0 min.
Range:
0-30 min.
The period during which the valve is
closed
Min. flow Minimum flow Default value:
0.0 l/h
Range:
0.0-999 l/h or
0.0-999 m
3
/h
If the water flow in the system is below
this limit, the valve is closed
The range and unit depend on the se-
lected application and flow sensor
Alternatively, if one of the user-definable inputs is set up as a digital input, this signal
can be used to activate flow cut-off. In this case, the valve is closed when the input is
short-circuited. For such a configuration, only the cut-off time can be set.
In more detail, the flow cut-off function works as follows:
1. The ECL 2000 detects that the condition for activating flow cut-off is present.
2. The ECL 2000 waits for 5 minutes before closing the valve.
3. The valve remains closed for the period of time specified in Cut-off time.
4. The valve is reopened and the ECL 2000 checks whether the flow cut-off condi-
tion is still present.
5. If this is the case, the valve is closed after a delay of 5 minutes. If the flow cut-off
condition is no longer present, the valve remains open.