4. Starting up the product
4.1 General information
Do not start the pump until it has been
filled with liquid and vented.
CAUTION
Biological hazard
Minor or moderate personal injury
‐ When pumping drinking water, the
pump must be flushed thoroughly with
clean water before startup in order to
remove any foreign matters, such as
preservatives, test liquid or grease.
4.1.1 Pumps with stuffing box
In the case of pumps with stuffing box, check that the
stuffing box gland is correctly fitted. It must be
possible to turn the pump shaft manually. If the pump
has been inactive for a long period, turn it manually to
make sure it has not got stuck. Loosen the stuffing
box or remove the packing.
4.1.2 Flushing the pipe system
The pump is not designed to pump liquids
containing solid particles such as pipe
debris and welding slag. Before starting up
the pump, the pipe system must be
thoroughly cleaned, flushed and filled with
clean water.
The warranty does not cover any damage
caused by flushing the pipe system by
means of the pump.
The startup procedure for the pumps has four steps:
1. Prestart checks. See section Prestart checks.
2. Priming. See section Priming.
3. Starting. See section Startup.
4. Final alignment. See section Alignment.
Only start the pump when you have
gone through all of the prestart checks.
Related information
4.2 Prestart checks
4.3 Priming
4.4 Startup
4.5 Final alignment
4.2
Prestart checks
Prestart checks have four steps:
1. Bearings
2. Stuffing boxes
3. Pressure gauge
4. Direction of rotation.
4.2.1 Bearings
Make sure that all bearings are properly lubricated.
See section Lubrication.
Related information
6.3.3 Lubrication
4.2.2 Stuffing boxes
Make sure that the stuffing box packing rings have
been properly tightened.
This does not apply to pumps with
mechanical shaft seals.
4.2.3 Pressure gauges
Make sure that the pressure gauge connections are
closed.
4.2.4 Direction of rotation
Check the direction of rotation in the following way:
1. Remove the coupling guard.
2. Disconnect the two coupling halves between
pump and motor.
3. Make sure that the motor shaft can turn freely.
4. Start the motor briefly to check the direction of
rotation. The correct direction of rotation is
indicated by the arrows on the pump casing.
The direction of rotation of the pump is
not always the same as the flow
direction.
5. If the direction of rotation is wrong, correct it by
interchanging two phases on the motor.
DANGER
Electric shock
Death or serious personal injury
‐ Before interchanging two phases,
make sure that the power supply
has been switched off and that it
cannot be accidentally switched on.
6. Check the direction of rotation again.
7. Reassemble the coupling and the guards.
20
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