Grundfos CUE 150 Instrucciones De Instalación Y Funcionamiento página 34

10.7.15 Operating range (3.18)
How to set the operating range:
• Set the min. speed within the range from a pump-dependent
min. speed to the adjusted max. speed. The factory setting
depends on the pump family.
• Set the max. speed within the range from adjusted min. speed
to the pump-dependent maximum speed. The factory setting
will be equal to 100 %, i.e. the speed stated on the pump
nameplate.
Min. speed
Fig. 42 Setting of the min. and max. curves in % of maximum performance
10.7.16 Motor bearing monitoring (3.19)
The motor bearing monitoring function can be set to these values:
• Active
• Not active.
When the function is set to Active, the CUE will give a warning
when the motor bearings are due to be relubricated or replaced.
Description
The motor bearing monitoring function is used to give an
indication when it is time to relubricate or replace the motor
bearings. See display 2.10 and 2.11.
The warning indication and the estimated time take into account if
the pump has been running with reduced speed. The bearing
temperature is included in the calculation if temperature sensors
are installed and connected to an MCB 114 sensor input module.
The counter will continue counting even if the
Note function is switched to Not active, but a warning
will not be given when it is time for relubrication.
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Pump-dependent speed range
Min.
Actual speed range
Min. speed, adjusted
Max. speed, adjusted
The area between the min. and max. speed is the actual
operating range of the pump.
The operating range can be changed by the user within the
pump-dependent speed range.
For some pump families, oversynchronous operation (max. speed
above 100 %) will be possible. This requires an oversize motor to
deliver the shaft power required by the pump during
oversynchronous operation.
Nominal speed Max. speed
Max.
100 %
10.7.17 Confirming relubrication/replacement of motor
bearings (3.20)
This function can be set to these values:
• Relubricated
• Replaced
• Nothing done.
When the motor bearings have been relubricated or replaced,
confirm this action in the above display by pressing "OK".
Relubricated cannot be selected for a period of
Note
time after confirming relubrication.
Relubricated
When the warning Relubricate motor bearings has been
confirmed,
• the counter is set to 0.
• the number of relubrications is increased by 1.
When the number of relubrications has reached the permissible
number, the warning Replace motor bearings appears in the
display.
Speed [%]