Menu Installation - Grundfos CRE Series Installation And Operating Instructions Manual

10.2.7 Lubrication status of motor bearings (only 15 - 30 Hp)
This display shows how many times the motor bearings have
been relubricated and when to replace the motor bearings.
When the motor bearings have been relubricated, confirm this
action in the INSTALLATION menu.
See section 10.3.14 Confirming relubrication/replacement of
motor bearings (only three-phase pumps) on page 23. When
relubrication is confirmed, the figure in the above display will be
increased by one.
10.2.8 Time till relubrication of motor bearings
(only 15 - 30 Hp)
This display shows when to relubricate the motor bearings.
The controller monitors the operating pattern of the pump and
calculates the period between bearing relubrications. If the
operating pattern changes, the calculated time till relubrication
may change as well.
The displayable values are these:
• in 2 years
• in 1 year
• in 6 months
• in 3 months
• in 1 month
• in 1 week
• Now!
10.2.9 Time till replacement of motor bearings
(only three-phase pumps)
When the motor bearings have been relubricated a prescribed
number of times stored in the controller, the display in
section 10.2.8 Time till relubrication of motor bearings (only 15 -
30 Hp) on page 18 will be replaced by the display below.
This display shows when to replace the motor bearings.
The controller monitors the operating pattern of the pump and
calculates the period between bearing replacements.
The displayable values are these:
• in 2 years
• in 1 year
• in 6 months
• in 3 months
• in 1 month
• in 1 week
•
Now!
18
DBP-1 - GRUNDFOS PUMP CRE - 99392005

10.3 Menu INSTALLATION

10.3.1 Control mode
Without sensor
(uncontrolled)
Select one of the following
control modes (see fig. 20):
•
Controlled
•
Uncontrolled.
If the pump is connected to a bus, the control
mode cannot be selected via the R100.
See section 15. Bus signal.
10.3.2 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 the
display below.
• The gain (K ) can be set within the range from 0.1 to 20.
p
• The integral time (T ) can be set within the range from 0.1 to
i
3600 s. If 3600 s is selected, the controller will function as a P
controller.
• Furthermore, it is possible to set the controller to inverse
control, meaning that if the setpoint is increased, the speed
will be reduced. In the case of inverse control, the gain (K
must be set within the range from -0.1 to -20.
The table below shows the suggested controller settings:
Heating
System/application
systems
p
L [ft]
p
p
With pressure sensor
(controlled)
Select one of the following
control modes (see fig. 20):
•
Controlled
•
Uncontrolled.
) and integral
p
)
p
K
p
Cooling
T
i
system
0.5
0.5
L < 16.4 ft: 0.5
1)
0.5
L > 16.4 ft: 3
L > 32.8 ft: 5
0.5 0.5