Grundfos MAGNA3 Bedienungsanleitung Seite 6

SeTTInGS
Setpoint influence
The setpoint influence is able to adjust the resulting setpoint in a given
control mode based on either a signal feedback (ext. setpoint function)
or the internal temperature measurement (temp. influence).
External setpoint function
Max.
The external setpoint function allows the
pump to be controlled by means of an
external analog input signal.
Min.
2 V 10 V
External influence changes the resulting
setpoint in the given control mode.
Please note that AUTO
FLOW
manual setpoints and therefore
cannot be influenced by an
external signal.
The commonly used control mode
for external setpoint function
is constant curve.
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and
ADAPT
are not controlled by
ADAPT
Temperature influence
H H
100%
H actual
30%
20 50 80 Q
T [°C]
T actual
In the above example,
Tmax. = 80 °C has been
selected. The actual
liquid temperature
Tactual (60 °C) causes
the setpoint for head
to be reduced from
100% to Hactual.
Temperature influence is chosen for
systems where correlation between the
media temperature and the pressure
setpoint of the pump is desired.
The temperature influence is linear
and can be chosen as either T=50C
or T=80C at 100% setpoint.
This function can be enabled in
proportional pressure, constant
pressure and constant curve.
The resulting setpoint will be
adjusted according to the
liquid temperature.
The pump must be installed
in the flow pipe. The temperature
influence function cannot be used
in air-conditioning and cooling
systems.
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