Start-Up; General Start-Up Procedure - Grundfos SL1 Notice D'installation Et De Fonctionnement

10. 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
FM
The pump must not be started if the atmosphere
in the tank is potentially explosive.
Warning
It may lead to personal injuries or death to open
the clamp while the pump is operating.

10.1 General start-up procedure

This procedure applies to new installations as well as after
service inspections if start-up takes place some time after the
pump was placed in the tank.
1. Remove the fuses and check that the impeller can rotate
freely. Turn the impeller by hand.
Warning
The impeller can have sharp edges - wear
protective gloves.
2. Check the condition of the oil in the oil chamber.
See also section
11.1 Inspection.
3. Check that the system, bolts, gaskets, pipework and valves
etc. are in correct condition.
4. Mount the pump in the system.
5. Switch on the power supply.
6. Check whether the monitoring units, if used, are operating
satisfactorily.
7. For pumps with WIO sensor, switch on the IO 113 and check
that there are no alarms or warnings. See section
8. Check the setting of air bells, float switches or electrodes.
9. Check the direction of rotation. See section
rotation.
10. Open the isolating valves, if fitted.
11. Check that the liquid level is above the motor for S1 operation
and above the cable entry for S3 operation. See fig. 15.
If the minimum level is not reached do not start the pump.
12. Start the pump and let the pump run briefly, and check if the
liquid level is falling.
13. Observe if the discharge pressure and input current are
normal. If not there might be air trapped inside the pump.
20
Note
Note
Caution
After one week of operation or after replacement of the shaft seal,
check the condition of the oil in the chamber. For pumps without
sensor, this is done by taking a sample of the oil, See section
11. Maintenance and service
Every time the pump has been removed from the tank, go through
the above procedure when starting up again.
9.6 IO 113.
10.3 Direction of
Trapped air can be removed from the pump
housing by tilting the pump by means of the
lifting chain when the pump is in operation.
In case of abnormal noise or vibrations from the
pump, other pump failure or power supply failure
or water supply failure, stop the pump
immediately. Do not attempt to restart the pump
until the cause of the fault has been found and
the fault corrected.
for procedure.