Operating the Pump
Assembly/Disassembly
Built-in protection
The motor incorporates an electronic unit which protects the motor in
various damaging situations.
In case of overload, the built-in overload protection will stop the pump for 5
minutes. After 5 minutes, the pump will attempt to restart.
If the pump is started and the well has not recovered, the pump will stop
after 30 seconds.
If the pump has been stopped as a result of dry running, it will start
automatically after 5 minutes or the reset time set by the R100.
Resetting the pump:
Switch off the electricity supply for 1 minute.
The motor is protected against the following conditions:
- dry running,
- voltage surges (up to 5000 V),
- overvoltage,
- undervoltage,
- overload
- overtemperature.
MSE 3NE Motors:
Note: To set Dry-Run limit in the MSE-NE pumps, you need to connect
the pump to a Redi-Flo3 status box. Refer to Redi-Flo3 status box I&O for
proper connections.
To set Dry-Run protection, follow these steps:
1. Start the pump against closed discharge.
2. Rapidly read the power consumption value (W) in the R100
display 2.5.
3. Multiply this value by 0.9.
4. Within the R100, go to display 4.6 and enter the new value
(minimum power limit).
5. Go to display 4.7 and change the setting to “Active”.
For further information on dry-running, refer to RediFlo3 Status Box I&O.
Maintenance and service:
The pumps are normally maintenance-free. Deposits and wear may occur.
For that purpose, service kits and service tools are available from
GRUNDFOS. The GRUNDFOS Service Manual is available on request.
The pumps can be serviced at a GRUNDFOS service center.
19. Assembly of Pump and Motor
To assemble pump end and motor, proceed as follows:
1. Place the motor horizontally in a vice and tighten it, see fig. 12.
2. Grease the motor shaft end with a vegetable based grease.
3. Screw the pump end on the motor. A spanner may be used on the
clamping faces of the pump part, see fig.12.
4. Install cable guard as described on page 7.
When pump end and motor have been assembled correctly, there must not
be a clearance between pump end and motor.
To disassemble reverse procedure.
Fig. 12
Page 11
Page 12
70 mm
30 mm
2.91"
1.2"
Use pump vise here.
