Primary Sensor (4.1 - Grundfos CONTROL MPC Installation And Operating Instructions Manual

11.7.6 Setting of influence function (4.1.3.2)
Fig. 37 Setting of influence function
Description
In this menu, you select the relation between the measuring
parameter which is to influence the setpoint and the desired
influence as a percentage.
The relation is set by entering values in a table with maximum
eight points by means of the control panel.
Example:
Setpoint influence [%]
100
25
0 10
Fig. 38 Relation between setpoint influence and flow rate
The control unit draws straight lines between the points. A
horizontal line is drawn from the minimum value of the relevant
3
sensor (0 m /h in the example) to the first point. This is also the
case from the last point to the sensor's maximum value (example
3
50 m /h).
Setting range
Two to eight points can be selected. Each point contains the
relation between the value of the parameter which is to influence
the setpoint and the influence of the value.
100 140
Temperature [°C]
Setting via control panel
1. Mark the Settings menu with
2. Mark Primary controller with
3. Mark External setpoint influence with
.
4. Mark Set the influence function with
.
5. Mark the menu line for number of points with
press .
6. Select the required number of points with
save with .
7. Mark External input value (point 1) with
8. Set the value of the external input value with
save with .
9. Mark Reduce setpoint to (point 1) with
10. Set the value as a percentage with
.
11. Repeat steps 7 to 10 for all desired parameters.
Factory setting
External setpoint influence is not activated.

11.7.7 Primary sensor (4.1.4)

Fig. 39 Primary sensor
Description
In this display, select the control parameter of the system and set
the sensor to measure the value.
For booster systems, the control parameter is usually the
discharge pressure which is measured by a sensor fitted on the
discharge manifold. In heating and cooling systems, the control
parameter is typically a differential pressure or a temperature.
See section 12. Measuring parameters.
Setting range
• Discharge pressure
• Differential pressure, external
• Differential pressure, pump
• Series 2000, differential pressure
• External pressure
• Differential pressure, inlet
• Differential pressure, outlet
• Flow rate
• Series 2000, flow rate
• Flow pipe temperature
• Return pipe temperature
• Differential temperature
• Ambient temperature
• Return pipe temperature, external
• 0-100 % signal
• Not used.
.
or , and press .
or , and press
or , and press
or , and
or , and
or .
or , and
or .
or , and save with
29