Temporary Shutdown; Final Shutdown For Maintenance Work Or Storage; Return Delivery/Storage - Wilo Sub TWU 3 Série Notice De Montage Et De Mise En Service

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the fault recurs, the unit must be switched off again
immediately. The unit may only be restarted, once the
fault has been rectified.
6.6 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.
Only hoisting gear that is in a technically perfect condi-
tion and load-carrying equipment that has been offi-
cially approved may be used for lowering and raising
the product.
Risk of fatal injury due to malfunctions!
Load-carrying equipment and hoisting gear must
be in a perfect technical condition. Work may
only commence if the hoisting gear has been
checked and found to be in perfect working
order. If it is not inspected, danger to personnel
may result!
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7.1 Temporary shutdown

For this type of shutdown, the product remains
installed and is not cut off from the electricity supply.
For temporary shutdown, the product must remain
completely submerged so that it is protected from frost
and ice. Ensure that the temperature of the pumped
liquid and in the operating area does not fall below
+3 °C.
This ensures that the product will be ready for opera-
tion at all times. During longer shutdown periods, carry
out a regular (monthly to quarterly) function run for a
period of 5 minutes.
Caution!
Only carry out a function run under the proper
operating and usage conditions. Never run the
machine dry! This can result in irreparable dam-
age!
7.2 Final shutdown for maintenance work or stor-
age
The system must be switched off and the product
must be disconnected from the mains by an electrician
and secured against being switched on again without
permission. Units with plugs must be unplugged (do
not pull the cable). Work on removing the product,
maintenance and storage can then commence.
Beware of poisonous substances!
Products that pump fluids which are hazardous
to health must always be decontaminated before
undertaking any other work! There is otherwise
a risk of fatal injury! Wear the necessary protec-
tive clothing for this work!
Beware of burns!
The housing parts can heat up to well above
104 °F (40 °C). There is a danger of burns! After
switching off, let the product cool down to
ambient temperature.
7.2.1 Removal
When installed vertically, the removal must be made in
the same way as the installation:
• Remove the well head.
• Remove the rising pipe and unit in reverse order to the
installation sequence.
When planning the appropriate dimensions and
selecting the lifting gear, consider that the com-
plete weight of the pipes, unit (including power
supply cable) and water column must all be lifted
during removal!
When installed horizontally, the water tank/container
must be completely emptied. The product can then be
disconnected from the discharge pipe and removed.

7.2.2 Return delivery/storage

For shipping, the parts must be packed and sealed in
sufficiently large, non-tearing plastic sacks to prevent
WILO SE 10/2011 V4.1WE