Grundfos CONTROL MPC User Manual

31
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.
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 or , and press .
3. Mark Proportional pressure with or , and press
.
4. Mark Activated with or , and press . The check
mark in the right box shows that the function has been
activated.
5. Mark Adaptation, linear or square with or , and
press .
6. Mark Influence at 0 flow with or . Set the value with
or , and save with .
Factory setting
The function is deactivated.
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
set
+ start/stop band. And a pump is
started when the current value becomes lower than H
set
.
See fig. 45.
Inverse control: A pump is started when the current value
becomes higher than H
set
+ start/stop band. And a pump is
stopped when the current value becomes lower than H
set
.
See fig. 45.
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 or , and press .
3. Mark S-system configuration with or , and press
.
4. Mark Inverse with or , and press .
5. Mark Start/stop band with or . Set the value
with or , and save with .
Factory setting
Normal.
TM03 8960 4807TM03 8524 1807
Setpoint
Resultant setpoint, linear
Pump curve
Starting point of proportional pressure control
(Influence at 0 flow = x % of H
set
)
Resultant setpoint, square
H
set
TM03 8961 4807TM03 9205 3607 - TM03 9205 3607
Start/stop band
H
set
Time [sec]
H [m]
Pump stops
Pump starts
Normal control
Start/stop band
H
set
Time [sec]
H [m]
Pump starts
Pump stops
Inverse control

Grundfos CONTROL MPC Specifications

General

Brand	Grundfos
Model	CONTROL MPC
Category	Control Systems
Language	English