Grundfos MAGNA3 D Instrucciones De Instalación Y Operación página 22

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Differential temperature
This control mode ensures a constant differential temperature drop
across heating and cooling systems.
The pump will maintain a constant differential temperature between
the pump and the external sensor.
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:
The pump performance is automatically adapted to the
consumption by switching pumps on and off.
22
Δt
H
Q
H
Q
For further
information, see
section
8.3.7 Differential
temperature.
For further
information, see
section
8.3.8 Constant curve.
For further
information, see
section 8.5 Multipump
modes.
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