34
WILO SE 04/2014 V05 DIN A4
English
DECOMMISSIONING/DISPOSAL
correct direction of rotation, a clockwise rotating
field must be available.
The pump is not approved for operation with a
counter-clockwise rotating field!
6.2.2. If the direction of rotation is incorrect
If the direction of rotation is incorrect for direct
start motors, 2 phases must be swapped. In the
case of star-delta motors, the connections of two
windings must be swapped, e.g. U1 with V1 and
U2 with V2.
6.3. Level control
Check that the level control device is installed
properly and inspect the switching points. For the
required information please refer to the instal-
lation and operating instructions for the level
control device, as well as the consulting docu
-
mentation.
6.4. Commissioning
The pump must have been installed properly as
specified in the “Installation” chapter. This must
be checked before the system is switched on.
Minor oil leakage in the mechanical shaft seal on
delivery is no cause for concern. However, it must
be removed prior to submersion in the fluid.
Keep out of the pump's work area. No persons
are allowed in the work area during start-up or
operation.
If the pump falls over, it must be switched off
before setting it up again.
WARNING: Danger of crushing!
In portable installations, the pump can fall
over when it is switched on or during opera-
tion. Make sure that the pump is positioned
on a firm bearing surface and that the pump
foot is mounted correctly.
6.4.1. Before activation
•
Check the following, in general:
•
Cable guidance – no loops, slightly taut
•
Min./max. temperature of the fluid
• Max. immersion depth
•
Clean the pipe system on the pressure side
(hose, piping) – flush with clean water to pre
-
vent deposits forming clogging.
• The hydraulics housing must be completely
filled by the fluid and there must be no air in
the housing. It can be vented by suitable vent-
ing devices in the system or, if available, using
vent screws on the pressure port.
•
Check switching points of level control and
dry-running protection systems
•
Check to ensure all accessories are properly
fitted
• The following points must also be checked for
wet well installation:
•
Clean the pump sump of coarse contaminants
•
Open all slide valves on the pressure side
6.4.2. Switching on/off
The pump is switched on and off using a sepa-
rate operating point (on/off switch, switchgear)
provided by the customer.
During the start-up procedure, the rated current
is temporarily exceeded. After the start-up pro-
cedure is finished, the current must not exceed
the rated current again.
If the motor does not start up, it must be
switched off without delay. Before switching it on
again, wait for the specified start pause and make
sure to rectify the fault.
6.5. Safety rules during operation
When operating the pump, always follow the
locally applicable laws and regulations for work
safety, accident prevention and handling elec
-
trical machinery. To help ensure safe working
practice, the responsibilities of employees should
be clearly specified by the operator. All personnel
are responsible for ensuring that regulations are
observed.
Due to their design, centrifugal pumps have
rotating parts that are easily accessible. Depend-
ing on the operating condition, sharp edges can
develop on these parts.
WARNING: Danger of crushing and amputation
of limbs!
Sharp edges can form on the rotating parts in
the hydraulics. These can result in crushing
and amputation of limbs. Never reach into the
hydraulics when the machine is in operation.
The following must be checked at regular inter-
vals:
•
Operating voltage (permissible dev/-
5% of the rated voltage)
•
Frequency (permissible dev/- 2% of the
rated frequency)
•
Current consumption (permissible deviation
between phases is a maximum of 5%)
• Voltage difference between the individual
phases (max. 1%)
•
Switching frequency (see technical data)
•
Avoid air entry in the inlet, a deflector plate
should be fitted if necessary
• Minimum water submersion
• Switching points for level control device or
dry-running protection
• Smooth running
• All slide valves must be open.
7. Decommissioning/disposal
• All work must be carried out with the greatest
care.
• Proper protective clothing is to be worn.
•
When carrying out work in basins and/or tanks,
the respective local protection measures must be
observed. A second person must be present for
safety reasons.
•
Only lifting equipment that is in a technically
perfect condition and load-carrying equipment
