Primary Sensor (4.1.4); Clock Program (4.1.6) - Grundfos Control DDD Montage- Und Betriebsanleitung

8.7.7 Primary sensor (4.1.4)

Fig. 49 Primary sensor
Description
You can select the control parameter of the system and set the
sensor to measure the value.
Setting range
• Discharge pressure
• External pressure
• Flow rate-3
• 0-100 % signal
• Not used.
The primary control parameter must always be set to
"Discharge pressure".
Setting via operating panel
• Settings > Primary controller > Primary sensor > Go to setting
of analog input. Display Analog inputs (4.3.8)
1. Select analog input (AI) for the primary sensor and set the
parameters.
2. Press [Back].
3. Select control parameter for the primary sensor.
Factory setting
The primary parameter is "Discharge pressure". The sensor is
connected to AI1 (CU 354). Other primary parameters can be
selected in the startup wizard.
30

8.7.8 Clock program (4.1.6)

Fig. 50 Clock program
Description
With this function, you can adjust the setpoint, and day and time
for the activation. You can also set day and time for stop of the
system.
The clock program works in two different ways, depending on the
selected mode. See below.
For more information, see section
(4.1.7).
Automatic adaptation
In this mode, the value is an offset you add to the setpoint of all
the remote sensors. The system will therefore increase the
pressure at the remote sensor with the given value. Use negative
values to reduce the pressure.
appears.
Manual adaptation and Disabled
For these modes, the value you enter is the absolute outlet
pressure at the pumping station.
If you change the offset by using the events, be aware that if you
add 0.5 bar in one time slot and 0.5 bar immediately after, the
resulting pressure for both settings will be the setpoint +0.5 bar.
The offset is always added to the original setpoint. See the table
below.
Time
[hh:mm]
08:00 - 09:00
09:00 - 10:00
10:00 - 11:00
8.7.9 Proportional pressure
If "Clock program" is disabled in "Automatic
adaptation" mode, all the remote sensors' setpoint
will be reverted to their given values (offset = 0).
If "Clock program" is disabled in "Manual adaptation"
mode or "Disabled" mode, the last used setpoint of
the clock program will be the active setpoint.
Minimum two events are required when activating the
"Clock program": one to start the system and one to
stop the system.
Setpoint Offset
[bar] [bar]
2.5 0.5
2.5 0.5
2.5 1.0
Resulting pressure
[bar]
3.0
3.0
3.5