Grundfos MAGNA3 25-80 Installation And Operating Instructions Manual page 21

Constant curve
• The pump can be set to operate according to a constant curve, like
an uncontrolled pump.
• Set the desired speed in % of the maximum speed in the range
from minimum to 100 %.
Multipump modes
• Alternating operation:
Only one pump is operating at a time.
• Backup operation:
One pump is operating continuously. In the event of a fault, the
backup pump starts automatically.
• Cascade operation:
Pump performance is automatically adapted to the consumption by
switching pumps on and off.
H
Q
For further
information, see
section 7.3.9 Constant
curve.
For further
information, see
section 7.5 Multipump
modes.
21