Preparing For Startup; Startup; Handling And Storing The Product; Handling The Product - Grundfos DPK Montage- Und Betriebsanleitung

4.3 Preparing for startup

Before starting the product, follow the steps below:
• Check that the fuses have been removed.
• Check that the impeller can rotate freely by
turning the impeller by hand.
– Wear protective clothing (gloves) when
touching the impeller.
• Check the condition of the oil.
See section 8.4.5 Oil check and oil
• Check the direction of the rotation.
See section 4.2 Checking the direction of
rotation.
• Make sure that the monitoring units, if used, are
operating.
• Check the setting of the level and float switches,
or electrodes.

4.4 Startup

The pump must not run dry.
In case of abnormal noise or vibrations
from the pump or other pump or power
supply failure, stop the pump immediately.
Do not attempt to restart the pump until the
cause of the fault has been found and
corrected.
Proceed as follows:
1. Switch on the power supply.
2. Open the isolating valves, if fitted.
3. Check that the motor is 2/3 covered with liquid.
If the liquid level is below that, add liquid to the
pit until the minimum level is reached.
4. Vent the pump by tilting it by means of the lifting
chain and let trapped air escape.
5. Run the pump briefly, and check if the liquid level
is falling. A correctly vented pump will quickly
lower the liquid level.
6. Start the pump.

5. Handling and storing the product

5.1 Handling the product

change.
When handling the product, observe the following
points:
• Check the lifting equipment and lifting
instructions.
See section
• Move the pump only with a fork-lift or a lifting
crane.

5.2 Storing the product

5.2.1 Warehouse storage
• The warehouse must be dry and free from
corrosive gases, vapours or vibrations which
might damage the pump.
• Store the pump in a vertical position on a pallet or
a stand to keep the pump off the floor and
facilitate easy removal.
• Coil up the cable, and seal the open end tightly
with waterproof plastic and tape or a cable cap.
Do this to prevent moisture from penetrating into
the motor which will cause severe damage to the
windings.
• Give all unpainted surfaces a light coat of oil or
grease to prevent corrosion.
• If new pumps are stored for more than two
months, turn the impeller by hand every two
months to prevent the mechanical seal faces
from seizing up. Failure to do this may result in
seal damage when the pump is started up again.
5.2.2 Storage in the pit (dry or wet)
• If an installed pump is not in operation for a long
time, check the insulation resistance and run the
pump for 30 minutes every month.
If the pump cannot be run due to lack of water in
the pit, inspect the pump and turn the impeller by
hand each month and before putting the pump
back into service. If the insulation resistance
drops below 10 megohms, contact Grundfos.
• When the pump is not in service, disconnect the
power supply from the control panel.
• If the pump is disconnected from the control
cabinet when not in service, protect the cable
end as described in section
storage.
CAUTION
Sharp element
Minor or moderate personal injury
- Wear protective clothing (gloves) when
working on the pump.
3.1.1 Lifting the product.
5.2.1 Warehouse
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