Wilo Sub TWI 4 Serie Notice De Montage Et De Mise En Service page 38

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6.2.2 If the direction of rotation is not correct
When using Wilo switching devices
Wilo switching devices are designed so that the con-
nected products are driven in the right direction. If the
rotation direction is wrong, 2 phases/leads of the
mains supply to the switching device must be replaced.
With switching devices provided by the customer:
If the rotation direction is wrong, with direct start
motors, 2 phases must be swapped. In the case of
star-delta start-up motors, the connections of two
windings must be swapped e.g. U1 with V1 and U2
with V2.
6.3 Adjusting the level-control device
For correct adjustment, please see the installation and
operation manual for the level control device.
Please observe the information on the minimum
water coverage of the product!
6.4 Startup
The work area of the unit is not a recreational
area and is to be kept free of persons! No per-
sons are allowed in the work area during switch-
ing on and/or during operation.
Before switching on for the first time, the installation
must be checked as described in the "Installation"
chapter and an isolation check must be carried out
according to the "Maintenance" chapter.
When using switching devices and/or plugs, the corre-
sponding IP protection classes must be observed.
6.4.1 Before switching on
The following points must be checked before switch-
ing on the submersible motor pump:
• Cable guidance – no loops, slightly taut.
• Check the temperature of the pumped liquid and the
submersion depth – see technical data.
• The product machine is fixed securely – vibration-free
operation must be assured.
• The accessories – pedestal, cooling jacket etc. are
securely fixed.
• The suction chamber of the pump sump and the pipe-
lines must be completely free of dirt.
• Flush out the pipeline and the product before connect-
ing them to the supply network.
• Carry out an insulation check. For details on this, see
the "Maintenance" chapter.
• The hydraulic housing must be flooded, i.e. it should be
completely full of fluid, with no air in it at all. Bleeding
can be carried out using a suitable bleeding device in
the system, or, if available, with bleeder screws on the
discharge port.
• The sliders on the pressure side should be half opened
during commissioning so that the pipeline can be bled.
• You can use an electrically actuated check valve to
reduce or prevent water impact. The unit can be
switched on in a throttled or closed slider position.
However, do not operate for long periods (> 5
minutes) with the slider closed or nearly closed,
and do not run the machine dry.
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• Check all level control and dry-run protection systems.
6.4.2 After starting up
The rated current is briefly exceeded during the start-
up procedure. Once the start-up procedure has com-
pleted, the operating current may no longer exceed the
rated current.
If the motor does not start immediately after the unit
is switched on, it must be switched off without delay.
The start pauses specified in the "Technical data"
chapter must be adhered to before starting up again. If
the fault recurs, the unit must be switched off again
immediately. The unit may only be restarted, once the
fault has been rectified.
6.5 Safety rules during operation
When operating the product, always follow the locally
applicable laws and regulations for work safety, acci-
dent prevention and handling electrical machinery. To
help to ensure safe working practice, the responsibili-
ties of employees should be clearly set out by the
owner. All personnel are responsible for ensuring that
regulations are observed.
The product has moving parts. During operation, these
parts turn to pump the fluid. Certain materials in the
pumped fluid can cause very sharp edges to form on
the moving parts.
Beware of rotating parts!
The rotating parts can crush and sever limbs.
Never reach into the hydraulics or the moving
parts during operation. Switch off the product
and let the moving parts come to a stop before
maintenance or repair work!
The following must be checked at regular intervals:
• Operating voltage (permissible deviation +/- 5% of
the rated voltage)
• Frequency (permissible deviation +/-2% of the rated
frequency)
• Current consumption (permissible deviation
between phases is a maximum of 5%)
• Voltage difference between the individual phases
(max. 1%)
• Starts and stops per hour (see technical data)
• Air entry in the intake, a guide plate or deflector
plate should be fitted if necessary
• Minimum water immersion level, level control unit,
dry-run protection
• Smooth, low vibration running
• Shut-off valves in the intake and discharge pipes
must be open.
7 Shut-down/disposal
All work must be carried out with the greatest care.
Proper protective clothing must be worn.
When carrying out work in basins and/or containers,
the respective local protection measures must be
observed in all cases. A second person must be present
for safety reasons.
WILO SE 10/2011 V4.1WE