Grundfos CU 301 Notice D'installation Et De Fonctionnement page 17

5.3.2 Setpoint
Set the desired pressure in this display.
Setting range unit:
• 2.0 - 5.0 bar, 0.5 bar intervals
• 40-100 psi, 10 psi intervals.
Relation to other displays
The setting in the display
overridden by the "Max." and "Min." settings in the
display
5.3.1 Operating mode.
Factory setting
3.0 bar (50 psi).
5.3.3 Analog input 1
Make the following settings according to sensor type:
• Sensor output signal: "-" (not active), 0-20 mA, 4-
20 mA, 0-10 V, 2-10 V.
• Setting range unit: bar or psi.
Two CU 301 front covers are available, one for bar
and another for psi. This means that a bar front cover
can be replaced by a psi front cover.
The pressure sensor must be replaced by
a sensor measuring the pressure in the
actual measuring unit.
When the front cover is replaced, the display
automatically changes from bar to psi or vice versa.
Relation to other displays:
The measuring unit appearing in the display
will be identical to the
5.2.2 Value, sensor 1
measuring unit in the front cover.
Factory setting
Sensor output signal: 4-20 mA
Setting range unit: bar or psi. Automatically set by
the front cover.
5.3.4 Maximum pressure
The set maximum pressure equals the upper
possible setting of the setpoint pressure value.
5.3.5 Automatic restarting
Set the automatic restart time from stop to restart
attempt.
The following settings are available:
• "Enabled"
• "Disabled"
• 0 to 254 minutes.
Factory setting
"5 minutes".
is
5.3.2 Setpoint
5.3.6 Double restarting time
The following settings are available:
• "Enabled"
• "Disabled".
When you select "Enabled", the restart time set
doubles automatically for every 10 motor stops
caused by an alarm. The time doubles up to a stop
time of 4 hours. After 10 hours of operation without
an alarm, the restart time is automatically set to one
of the following:
• The time set in the "Time" field.
• 5 minutes (factory setting) if no setting was made
in the "Time" field.
5.3.7 Dry-running stop
The dry-running stop value (dry-running power limit)
is factory-set.
The value depends on the actual motor.
The factory setting depends on the power rating of
the motor. See section
8. Technical
When the dry-running protection is to be enabled,
the minimum value of the pump power input must be
set in this display.
For further information, see section
protection.
Setting range: 0-2500 W.
Relation to other displays
4.7 Dry-running protection
Read the actual pump power input in the display
5.2.5 Power consumption.
Factory setting
Motor size
0.7 kW
0.7 kW (SQ/SQE 2-55)
1.15 kW
1.55 kW
1.85 kW
5.3.8 Maximum speed
Set the maximum speed.
Setting range: 3000 - 10,700 min
Factory setting
-1
10,700 min .
data.
4.7 Dry-running
must be set to "Enabled".
Dry-running stop
300 W
550 W
680 W
800 W
900 W
-1
.
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