Grundfos CU 301 Instrucciones De Instalación Y Operación página 19

Dry-running stop at reduced maximum pump
speed:
If the maximum pump speed has been reduced,
the dry-running stop value in display
stop 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
Step
Start the pump against a closed outlet
1
valve.
Read the power input (P1) in the
2
display Power
Calculate the minimum power limit as
3
follows: Power limit [W] = P1 × 0.9.
Related information
5.7 Dry-running protection
6.2.5 Power consumption
6.3.1 Operating mode
6.3.7 Dry-running stop
8.1 Troubleshooting with Grundfos GO Remote
6.3.9 Cut-in speed
In the case of an oversized pump or drastically
changing water levels, this function may cause
excess pressure at startup in relation to the
desired outlet pressure. The cut-in speed can
therefore be lowered to compensate.
Setting range: 3000 - 10,700 rpm (100 rpm
intervals).
Factory setting
8200 rpm
6.3.10 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
5.4 Button locking
Dry-running
stop.
Action
consumption.
6.3.11 Number
When allocating a number, the power
supply to other CU 301 units, if any,
must be switched off.
Allocate a number to CU 301 and the pump
connected. CU 301 and the pump must have the
same number. In situations where multiple CU
301s are installed in same location, they must
have separate numbers.
Setting range: "Not active", 1, 2, .... 199.
Once a number setting is made, the factory
setting (not active) is no longer available.
If CU 301 and the pump do not have the same
number, the alarm "No contact" will be indicated.
When installing a new CU 301 on an
existing SQE where a number was
previously assigned, a new number
must be assigned to pair the two
devices.
The SQE pump must be connected to
CU 301.
Factory setting
"Not active".
Related information
3.2.2 Pump supply
8.1 Troubleshooting with Grundfos GO Remote
6.3.12 Indicator lights
The indicator light setting can be changed in
Grundfos GO Remote.
Available settings:
• "Running lights" during pump operation
(factory setting).
• "Constant lights" during pump operation.
Related information
5.2 Indication of pump operation
6.3.13 Store settings
Store the actual settings for later use.
6.3.14 Recall settings
Recall the last stored settings that the pump will
then use.
6.3.15 Undo
Undo previously made settings.
6.3.16 Unit configuration
Select between SI and US units. The setting can
be made generally for all parameters or
customized for each individual parameter.
Factory setting
According to the front foil.
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