Grundfos Control MPC-Serie Installationsanleitung Seite 26

8.5.4 Alternative setpoints (2.1.3)
Fig. 27 Alternative setpoints
Description
In addition to the primary setpoint 1 shown in display 2 in menu
"Operation", you can set six alternative setpoints for closed-loop
control mode. Furthermore, you can set seven setpoints for open-
loop control mode.
You can activate one of the alternative setpoints by means of
external contacts. See sections
and 8.7.4 Alternative setpoints 2-7 (4.1.2.1 -
Setting range
The setting range of setpoints for closed-loop control mode
depends on the range of the primary sensor. See section
8.7.7 Primary sensor (4.1.4).
In open-loop control mode, the setting range is 0-100 %.
Setting via the operating panel
• Operation > Further settings > Alternative setpoints.
Set the setpoint.
Factory setting
Setpoint 1 for closed-loop control mode is a value suitable for the
system in question.
The alternative setpoints for closed-loop control mode are 3 bar.
All setpoints for open-loop control mode are 70 %.
26
8.7.3 Alternative setpoints (4.1.2)
4.1.2.7).
8.5.5 Individual pump control (2.1.4)
Fig. 28 Individual pump control
Description
You can change the operating mode from automatic operation to
one of the manual operating modes.
Auto
The pumps are controlled by the PI controller, ensuring that the
system delivers the required performance.
Manual
The pump is not controlled by the PI controller, but set to one of
the following manual operating modes:
• Max.
– The pump runs at a set maximum speed. This operating
mode can only be selected for variable-speed pumps.
• Normal
– The pump runs at a set speed.
• Min.
– The pump runs at a set minimum speed. This operating
mode can only be selected for variable-speed pumps.
• Stop
– The pump has been forced to stop.
Pumps in manual operation are not part of the normal pump
cascade and speed control. The manual pumps are a
'disturbance' of the normal operation of the system.
If one or more pumps are in manual operation, the system may
not be able to deliver the set performance.
There are two displays for the function. In the first display, select
the pump to be set, and in the next display, select the operating
mode.
Setting range
All pumps can be selected.
Setting via the operating panel
Operation > Further settings > Individual pump control.