Grundfos CRE Series Installation And Operating Instructions Manual page 22

Operating hours
Tolerance: ± 2 %.
The value of operating hours is an accumulated value and cannot
be reset.
Replace motor bearings
This display shows when to replace the motor bearings.
The controller monitors the operating pattern of the motor and
calculates the period between bearing replacements.
Displayable values:
• in 2 years
• in 1 year
• in 6 months
• in 3 months
• in 1 month
• in 1 week
• Now!
22
10.3.4 INSTALLATION menu
Control mode
Select one of the following control modes:
• Const. pressure
• Const. diff. press.
• Const. temperature
• Const. diff. temp.
• Const. flow rate
• Const. level
• Const. curve
• Const. other value.
See section
9. Operating and control modes
information.
If the pump is connected to a bus, the control
Note
Note
mode cannot be selected via the R100. See
section 12. Bus signal.
Controller
E-pumps have a factory default setting of gain (K
time (T ). However, if the factory setting is not the optimum
i
setting, the gain and the integral time can be changed in this
display below:
• Set the gain (K ) within the range from 0.1 to 20.
p
• Set the integral-action time (T
3600 s.
If 3600 s is selected, the controller will function as a P
controller.
• Furthermore, the controller can be set to inverse control,
meaning that if the setpoint is increased, the speed will be
reduced. In the case of inverse control, the gain (K
set within the range from -0.1 to -20.
for further
) and integral
p
) within the range from 0.1 to
i
) must be
p