en
Shut-down/dismantling
20
WILO SE 2019-02
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Observe regulations for working with heavy loads and under
suspended loads.
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Provide the necessary protective equipment and make sure
that the personnel wears it.
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Provide adequate aeration in closed rooms.
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Take immediate countermeasures if there is a build-up of
toxic or suffocating gases!
8.3
Shut-down
The pump is deactivated during decommissioning, but remains
installed. This ensures that the pump is always ready for opera-
tion.
‡
To protect the pump from frost and ice, always immerse
the pump completely in the fluid.
‡
The temperature of the fluid must always be above
+3 °C (+37 °F).
1. Switch off the pump at the operating point.
2. Secure the operating point against being switched on
again by unauthorised persons (e.g. lock main switch).
▶ The pump is out of operation and can now be dis-
mantled.
If the pump remains installed after decommissioning, observe the
following:
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Ensure that the prerequisites for decommissioning are main-
tained for the complete period of decommissioning. If these
prerequisites cannot be guaranteed, dismantle the pump after
decommissioning!
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For an extended period of decommissioning, carry out a 5-
minute function test at regular intervals (monthly to
quarterly).
CAUTION! A function test may only be carried out
under the applicable operating conditions. A dry run is not
permitted! Non-compliance can result in irreparable dam-
age!
8.4
Removal
DANGER
Danger due to fluids hazardous to health!
If the pump is used in fluids hazardous to health, de-
contaminate the pump after dismantling and before
carrying out any other work! There is a risk of fatal
injury! Observe the specifications in the work regula-
tions! The operator must make sure that the person-
nel have received and read the work regulations!
DANGER
Risk of death due to electrocution!
Improper conduct when carrying out electrical work
can lead to death due to electric shock! Electrical
work must be carried out by a qualified electrician in
accordance with the locally applicable regulations.
DANGER
Risk of fatal injury due to dangerous lone
working practices!
Work in chambers and narrow rooms as well as work
involving risk of falling are dangerous work. Such
work may not be carried out autonomously! A second
person must be present for safety reasons.
WARNING
Risk of burns from hot surfaces!
Motor housing can become hot during operation. It
may cause burns. Allow the pump to cool down at
ambient temperature after switching it off!
NOTICE
Use only properly functioning lifting equip-
ment!
Use only properly functioning lifting equipment to
lift and lower the pump. Ensure that the pump does
not become jammed during lifting and lowering. Do
not
exceed the maximum bearing capacity of the
lifting equipment! Check that lifting equipment is
functioning properly before use!
8.4.1
Stationary wet well installation
‡
Pump is decommissioned.
‡
Gate valves on the inlet and pressure side closed.
1. Disconnect the pump from the mains.
2. Attach the lifting equipment to the attachment point.
CAUTION! Never pull on the power supply cable! This
damages the power supply cable!
3. Slowly raise the pump and lift above the guide pipes
from the operating space.
CAUTION! The power supply
cable can be damaged while lifting! Hold the power
supply cable slightly taut when lifting!
4. Clean the pump thoroughly (see point “Cleaning and
disinfecting”).
DANGER! Disinfect the pump when used
in fluids hazardous to health!
