Start-Up; Before Start-Up; Operating Modes - Grundfos SEG AUTOADAPT Montage- Und Betriebsanleitung

11. Start-up

Warning
Before starting work on the pump,
make sure that the fuses have been
removed or the mains switch has been
switched off. It must be ensured that
the power supply cannot be
accidentally switched on.
Make sure that all protective equipment
has been connected correctly.
The pump must not run dry.
Warning
Opening the clamp when the pump is
started can lead to personal injury or
death.
Warning
The pump must not be started if a
potentially explosive atmosphere is
present in the tank.
In case of abnormal noise or vibrations
from the pump or other pump or supply
failure, stop the pump immediately.
Caution
Do not attempt to restart the pump until
the cause of the fault has been found
and the fault corrected.
After one week of operation after replacement of the
the shaft seal, the condition of the oil in the oil
chamber should be checked. See section
12. Maintenance and service for procedure.

11.1 Before start-up

Proceed as follows:
1. Remove the fuses. Check that the impeller can
rotate freely. Turn the grinder head by hand.
2. Check the condition of the oil in the oil chamber.
See also section 12.8 Oil change.
3. Check that the level sensor is clean, and that the
protective cap is intact.
4. Check that the dry-running sensors are clean.
5. Open the isolating valves, if fitted.
6. Lower the pump into the liquid, and insert the
fuses.
7. Check that the system has been filled with liquid
and vented. The pump is self-venting.
8. Switch on the power supply to the pump.
When powered, the pump will start and pump down
to the dry-running level. This function can be used to
check the pump.
If the dry-running sensors are not
covered by liquid, the pump cannot
Note
start.
20

11.2 Operating modes

The pumps are designed for intermittent operation
(S3). When completely submerged, the pumps can
also operate continuously (S1).
• S3, intermittent operation:
The electronics of the pump will in due time stop
the pump automatically. The operating mode S3
means that within 10 minutes the pump must run
for 4 minutes and be stopped for 6 minutes.
See fig. 9.
In this operating mode, the pump is partly
submerged in the pumped liquid, i.e. the liquid
level reaches at minimum the middle of the motor.
P
Operation
4 min.
Stop
Fig. 9 S3 operation
• S1, continuous operation:
In this operating mode, the pump can operate
continuously without having to be stopped for
cooling. See fig. 10. Being completely
submerged, the pump is sufficiently cooled by
the surrounding liquid.
P
Fig. 10 S1 operation
6 min.
t
10 min.
t