Proportional Pressure (4.1 - Grundfos CONTROL MPC Installation And Operating Instructions Manual

11.7.9 Proportional pressure (4.1.7)

Fig. 42 Proportional pressure
Description
The function can only be activated in pressure-controlled systems
and automatically adapts the setpoint set to the current flow rate.
The adaptation can be linear or square. See fig. 43.
Pump curve
Setpoint
Resultant setpoint, linear
Resultant setpoint, square
H
set
Starting point of proportional pressure control
(Influence at 0 flow = x % of H
Fig. 43 Proportional pressure
The function has these purposes:
• to compensate for pressure losses
• to reduce the energy consumption
• to increase the comfort for the user.
Setting range
• Activation of the function.
• Selection of control mode.
• Setting of setpoint influence.
Setting via control panel
1. Mark the Settings menu with
2. Mark Primary controller with
3. Mark Proportional pressure with
.
4. Mark Activated with
mark in the right box shows that the function has been
activated.
5. Mark Adaptation, linear or square with
press .
6. Mark Influence at 0 flow with
or , and save with
Factory setting
The function is deactivated.
)
set
.
or , and press
or , and press
or , and press . The check
or , and
or . Set the value with
.
11.7.10 S-system configuration (4.1.8)
Fig. 44 S-system configuration
Description
The function makes it possible to invert the control of mains-
operated pumps (Control MPC-S). That is to set whether pumps
are to be started or stopped depending on the current value.
A start/stop band must be set in order to use this function.
See fig. 45.
Normal control: A pump is stopped when the current value
becomes higher than H
started when the current value becomes lower than H
See fig. 45.
Inverse control: A pump is started when the current value
becomes higher than H
stopped when the current value becomes lower than H
See fig. 45.
Normal control
H [m]
Pump stops
Start/stop band
H
set
Pump starts
Time [sec]
Fig. 45 Normal and inverse control
Setting range
• Selection of configuration (normal or inverse control).
• Setting of start/stop band.
.
Setting via control panel
1. Mark the Settings menu with
2. Mark Primary controller with
3. Mark S-system configuration with
.
4. Mark Inverse with
5. Mark Start/stop band with
with or , and save with
Factory setting
Normal.
+ start/stop band. And a pump is
set
+ start/stop band. And a pump is
set
Inverse control
H [m]
Pump starts
Start/stop band
H
set
Pump stops
Time [sec]
.
or , and press
or , and press
or , and press .
or . Set the value
.
.
set
.
set
.
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