9.6 Setting the proportional pressure
9.6.1 Control curve function
You can set the proportional curve either to quadratic
or linear to match the system curve.
9.6.2 Zero flow head
You can set this value in percentage of the setpoint
and define how much the setpoint must be reduced at
a closed valve. With a setting of 100 %, the control
mode is equal to the constant differential pressure.
9.6.3 Fixed inlet pressure
This menu enables the use of a fixed inlet pressure.
9.6.4 Inlet pressure
Enter the fixed inlet pressure that is to be supplied to
the pump.
9.6.5 Pump data
To enable the pump to operate in proportional
pressure, the controller needs to process the pump
curve. Enter the maximum head, rated head and
rated flow rate from the pump nameplate.
9.7 FLOWLIMIT
FLOWLIMIT
• Enable the FLOWLIMIT function.
• Set the FLOWLIMIT.
H
Q
Q
max
Q
max
Q
limit
25 %
90 %
1
TM057908
FLOWLIMIT
Pos. Description
1 Setting range
You can combine the FLOWLIMIT function with the
following control modes:
• Prop. pressure
• Con. diff. press.
• Con. diff. temp.
• Const. temp.
• Const. curve.
A flow-limiting function ensures that the flow never
exceeds the entered FLOWLIMIT value.
The setting range for FLOWLIMIT is 25 to 90 % of the
Q
max
of the pump.
The factory setting of FLOWLIMIT is the flow rate
where the AUTOADAPT factory setting meets the
maximum curve. See the figure above.
Factory setting
See the section on factory settings.
Related information
9.58 Factory settings for Grundfos GO
54
English (GB)
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