Operating Range - Grundfos LFE Instrucciones De Instalación Y Funcionamiento

17.3.12 Operating range

How to set the operating range:
• Set the minimum curve within the range from maximum curve
to 12 % of maximum performance. The pump is factory-set to
24 % of maximum performance.
• Set the maximum curve within the range from maximum
performance (100 %) to minimum curve.
The area between the minimum and maximum curves is the
operating range.
H
100 %
Max. curve
Min. curve
12 %
Fig. 38 Setting of the minimum and maximum curves in % of
maximum performance
17.3.13 Motor bearing monitoring (only three-phase pumps)
The motor bearing monitoring function can be set to these values:
• Active
• Not active.
When the function is set to Active, a counter in the controller will
start counting the mileage of the bearings. See section
17.2.7 Lubrication status of motor bearings (only 15-30
The counter will continue counting even if the
function is switched to Not active, but a warning will
not be given when it is time for relubrication.
When the function is switched to Active again, the
accumulated mileage will again be used to calculate
the relubrication time.
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17.3.14 Confirming relubrication/replacement of motor
This function can be set to these values:
•
•
•
When the bearing monitoring function is Active, the controller will
give a warning indication when the motor bearings are due to be
relubricated or replaced. See section
When the motor bearings have been relubricated or replaced,
confirm this action in the above display by pressing OK.
17.3.15 Standstill heating (only three-phase pumps)
Q
The standstill heating function can be set to these values:
•
•
When the function is set to Active, an AC voltage will be applied
to the motor windings. The applied voltage will ensure that
sufficient heat is generated to avoid condensation in the motor.
hp).
bearings (only three-phase pumps)
Relubricated (only 15-30 hp)
Replaced
Nothing done.
Relubricated cannot be selected for a period of time
after confirming relubrication.
Active
Not active.
17.1.3 Fault indications.
41