Grundfos CU 301 Instrucciones De Instalación Y Funcionamiento página 20

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 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
Dry-running protection must be set to "Enabled".
Read the actual pump power input in the display
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
Related information
4.7 Dry-running protection
5.2.5 Power consumption
5.3.9 Cut-in speed
7.1 Fault finding with Grundfos GO Remote
8. Technical data
5.3.8 Maximum speed
Set the maximum speed.
Setting range: 3000 - 10,700 min
Factory setting
-1
10,700 min .
Related information
5.3.1 Operating mode
20
data.
Dry-running
Dry-running stop
300 W
550 W
680 W
800 W
900 W
-1
.
5.3.9 Cut-in speed
In the case of an oversized pump or drastically
changing water levels, this function may cause an
excess pressure, at start-up, in relation to the desired
discharge pressure. The cut-in speed can therefore
be lowered to compensate.
Setting range: 3000 - 10,700 min
intervals).
Dry-running stop at reduced maximum pump
speed:
If the maximum pump speed has been reduced, the
dry-running stop value in display
must be changed.
Calculating the minimum power limit:
If the pump is worn, a renewed calculation
of the minimum power limit may be
required.
The calculated value is used in the display
Dry-running stop.
Step
1 Start the pump against closed outlet valve.
Read the power input (P1) in the display
2
Power consumption.
Calculate the minimum power limit as
3
follows: Power limit [W] = P1 × 0.9.
Factory setting
-1
8200 min
Related information
5.2.5 Power consumption
5.3.7 Dry-running stop
5.3.10 Buttons on product
Disable the on/off button on CU 301 for protective
reasons.
You can set the on/off button to the following:
• "Active"
• "Not active".
Factory setting
"Active".
Related information
4.4 Button locking
-1 -1
(100 min
Dry-running stop
Action