ENGLISH
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The pump must not be started if the atmosphere in the tank is potentially explosive.
Before starting the pump, check that it is suitably connected to the pumping system to avoid
uncontrolled leakage of liquid.
Do not put your hands or any tool into the pump suction or discharge port after the pump has
been connected to the power supply.
7.1 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.
- After long periods of storage, check the conditions of the oil in the oil chamber. See also section 8.1
Routine maintenance.
- Check that the system, bolts, gaskets, pipework and valves etc. are in correct condition.
- Mount the pump in the system.
- Switch on the power supply.
- Check whether the monitoring units, if used, are operating satisfactorily.
- Check the setting of the float switches or of the level sensors.
- Check that the impeller can turn freely by briefly starting the motor.
- Check the direction of rotation. See section 7.2 Direction of rotation.
- Open the isolating valves, if fitted.
- Check that the liquid level is above the motor for S1 operation and above the cable entry for S3
operation. See fig. 9. If the minimum level is not reached do not start the pump.
- Start the pump and let the pump run briefly, and check if the liquid level is falling.
- Observe if the discharge pressure and input current are normal. If not there might be air trapped inside
the pump (See section 5 Installation).
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.
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 8. Maintenance and service for
procedure. Every time the pump has been removed from the tank, go through
the above procedure when starting up again.
7.2 Direction of rotation
The pump may be started for a very short period without being submerged to check the
direction of rotation.
Check the direction of rotation before starting up the pump. An arrow on the motor housing indicates the correct
direction of rotation. Correct direction of rotation is clockwise when viewed from above.
Checking the direction of rotation
The direction of rotation should be checked in the following way every time the pump is connected to a new
installation.
Procedure
1. Let the pump hang from a lifting device, e.g. the hoist used for lowering the pump into the tank.
2. Start and stop the pump while observing the movement (jerk) of the pump. If connected correctly, the
pump will rotate clockwise, i.e. it will jerk counter-clockwise. See fig. 10. If the direction of rotation is
wrong, interchange any two of the phases in the power supply cable.
