English (GB)
15
4.2.2 SEV pumps
1. Remove the pump from the system.
2. Check that the impeller can rotate freely. Turn the
impeller by hand.
3. Check the condition of the oil in the oil chamber.
See also section 8.2 Checking and changing the
oil.
4. Check whether the monitoring units, if used, are
operating satisfactorily.
5. Check the setting of the air bells, float switches
or electrodes.
6. Check the direction of rotation. See section
4.1 Checking the direction of rotation.
7. Submerged pumps:
– Start the pump above water level and lower the
pump into the pit to avoid air being trapped in
the pump housing.
8. Dry-installed pumps with positive inlet
pressure (the pump is installed in a pump room
next to the pit):
– Open the isolating valve on the inlet side.
– Loosen the vent screw until water comes out of
the vent hole; then tighten the vent screw
again.
– Open the isolating valve on the outlet side and
start the pump.
9. Dry-installed pumps with inlet pipe and foot
valve:
– Open the isolating valve on the outlet side to let
the water above the valve run backwards to
prime the inlet pipe.
– Loosen the vent screw until water comes out of
the vent hole; then tighten the vent screw
again.
– Start the pump.
10. Dry-installed pumps with inlet pipe and foot
valve, without or with short outlet pipe (we
recommend that you use a vacuum system):
– Keep the isolating valve on the outlet side
closed.
– Start the vacuum system until liquid has been
sucked in and the pump has been vented.
– Open the isolating valve on the outlet side and
start the pump.
Fig. 11 Position of the air vent screw
5. Handling and storing the product
5.1 Handling
See section 3.1.1 Lifting the pump.
5.2 Storing the product
During long periods of storage, the pump must be
protected against moisture, heat and cold.
We recommend that you leave the polyurethane-
embedded plug mounted in the pump to prevent
moisture from penetrating into the motor.
If the pump has been in use, the oil needs to be
changed before storage. See section 8.2 Checking
and changing the oil.
After a long period of storage, the pump must be
inspected before it is put into operation. Make sure
that the impeller can rotate freely. Pay special
attention to the condition of the shaft seal, O-rings,
oil and the cable entry.
Check that there is positive inlet pressure
before starting up the pump.
TM04 4139 0809
If the product is stored for more than one
year or if it will be a long time until it is put
into operation after the installation, turn the
impeller by hand at least once a month.
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