Control Modes - Grundfos MAGNA Serie Instrucciones De Instalación Y Funcionamiento

7.1 Control modes

A GRUNDFOS MAGNA pump can be set to the
control mode which is most suitable for the individual
system.
Possible control modes:
• AUTO (factory setting)
ADAPT
• Proportional pressure
• Constant pressure.
Each of the control modes can be combined with
automatic night-time duty, see section 7.3 Automatic
night-time duty.
AUTO
ADAPT
To be set on the control panel or with the R100, see
section 8. Setting the pump.
The control mode AUTO
ADAPT
the pump performance.
The setpoint of the pump has been factory-set as
follows and cannot be changed manually:
• MAGNA 32-120, 40-120, 50-120, 65-120 to
6.5 metres.
• MAGNA 50-60, 65-60 to 3.5 metres.
When the pump registers a lower pressure on the
max. curve, A , the AUTO
2
automatically selects a correspondingly lower control
curve, H , thus reducing the energy consumption.
set2
H
max.
H
fac.
A
1
Fig. 9 AUTO
ADAPT
A : Original duty point.
1
A : Lower registered pressure on the max. curve.
2
A : New duty point after AUTO
3
H : Original setpoint.
set1
H : New setpoint after AUTO
set2
H : Factory-set setpoint.
fac.
The AUTO function can be reset by pressing
ADAPT
the button for approx. 10 seconds until the control
mode is back to the starting point (AUTO
AUTO with automatic night-time duty).
ADAPT
continuously adapts
function
ADAPT
H
set1
H
set2
A
A 2
3
control.
ADAPT
control.
ADAPT
or
ADAPT
Proportional-pressure control
To be set on the control panel or with the R100, see
section 8. Setting the pump.
The pump head is reduced at decreasing water
demand and increased at rising water demand, see
fig. 10.
Constant-pressure control
To be set on the control panel or with the R100, see
section 8. Setting the pump.
The pump maintains a constant pressure,
irrespective of water demand, see fig. 10.
H
H
set
H
set
2
2
Q
Proportional
pressure
Fig. 10 Pressure control
H
H
set
Q
Constant
pressure
13