Grundfos CRE Serie Notice D'installation Et De Fonctionnement page 20

Fig. 20 AYB connector plug
4.4.12 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.
H
100 %
Max. curve
Min. curve
12 %
Fig. 21 Setting of the min. and max. curves in % of maximum
performance
20
4.4.13 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 section
4.3.7 Lubrication status of motor bearings (only 20-30 hp).
4.4.14 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 section 4.2.3 Fault indications.
When the motor bearings have been relubricated or replaced,
confirm this action in the above display by pressing OK.
4.4.15 Standstill heating (only three-phase pumps)
The standstill heating function can be set to these values:
• Active
• Not active.
Q
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.
– 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.
Relubricated cannot be selected for a period of time
after confirming relubrication.