Grundfos CONTROL MPC, Инструкция по установке и эксплуатации

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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"), six alternative setpoints can be set for closed-loop
control. It is furthermore possible to set seven setpoints for open-
loop control.
It is possible to activate one of the alternative setpoints by means
of external contacts. See sections
8.7.3 Alternative setpoints
(4.1.2)
and
8.7.4 Alternative setpoints 2 - 7 (4.1.2.1 - 4.1.2.7)
.
Setting range
The setting range of setpoints for closed-loop control depends on
the range of the primary sensor. See section
8.7.7 Primary
sensor (4.1.4)
.
In open loop control, the setting range is 0-100 %.
Setting via control panel
• Operation > Further settings > Alternative setpoints.
Set the setpoint.
Factory setting
Setpoint 1 for closed-loop control is a value suitable for the
system in question.
The alternative setpoints for closed-loop control are 3 bar.
All setpoints for open-loop control are 70 %.
8.5.5 Individual pump control (2.1.4)
Fig. 28 Individual pump control
Description
It is possible to 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, the
pump to be set is selected, and in the next display, the operating
mode is selected.
Setting range
All pumps can be selected.
Setting via control panel
Operation > Further settings > Individual pump control.