Grundfos CRE Instructions

5.4.12 Operating range
How to set the operating range:
• Set the min. curve within the range from max. curve to 12 % of
maximum performance. The pump is factory-set to 24 % of
maximum performance.
• Set the max. curve within the range from maximum performance
(100 %) to min. curve.
The area between the min. and max. curves is the operating range.
Q
H
1
2
3
100%
12%
TM007747
Setting of the min. and max. curves in % of maximum
performance
Pos. Description
1 Min. curve
2 Max. curve
3 Operating range
5.4.13 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 the section on
lubrication status of motor bearings (only 11-22 kW).
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.
Related information
5.3.7 Lubrication status of motor bearings (only 20-30 hp)
5.3.7 État de lubrification des roulements moteur (20-30 HP
uniquement)
5.3.7 Estado de lubricación de los cojinetes del motor (solo
modelos de 20-30 HP)
5.4.14
Confirming relubrication/replacement of motor bearings
(only three-phase pumps)
This function can be set to these values:
• Relubricated (only 20-30 hp)
• Replaced
• Nothing done.
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 the section on fault indications.
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 time after
confirming relubrication.
Related information
5.2.3 Fault indications
5.4.15 Standstill heating (only three-phase pumps)
The standstill heating function can be set to these values:
• Active
• Not active.
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.
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English (US)

Grundfos CRE Specifications

General

Protection Class	IP55
Material	Stainless Steel
Applications	Water supply, pressure boosting, irrigation
Impeller Material	Stainless Steel
Pump Housing Material	Stainless Steel
Connection Size	DN32 to DN200 (depending on model)
Power Supply	3-phase
Control	Integrated frequency converter