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6.7
Electrical connection
28
Installation and electrical connection
DANGER
Risk of fatal injury due to electrical current!
Improper conduct when carrying out electrical work can lead to death due to electric
shock!
• The electrical connection should only be established by an electrician approved
by the local electricity supplier.
• Observe the locally applicable regulations.
• Before beginning work on the product, make sure that the pump and drive are
electrically isolated.
• Make sure that no one can turn on the power supply again before work is com-
pleted.
• Make sure that all energy sources can be isolated and locked. If the pump was
switched off by a safety device, it must be secured against switching back on
again until the error has been remedied.
• Electrical machines must always be earthed. Earthing must be appropriate for
the drive and meet the relevant standards and regulations. Earth terminals and
fixation elements must be suitably dimensioned.
• Connection cables must never touch the piping, pump or motor housing.
• If it is possible for persons to come into contact with the pump or the pumped
fluid, the earthed connection must also be fitted with a residual current circuit
breaker.
• Observe the manufacturer's installation and operating instructions for the ac-
cessories!
DANGER
Risk of fatal injury due to contact voltage! Even when it is disconnected,
high contact voltages can still occur in the electronic module due to non-
discharged capacitors.
Touching live parts will result in serious injuries or death!
• Before working on the pump, disconnect the power supply and wait for
5 minutes.
• Check whether all connections (including potential-free contacts) are voltage-
free.
• Never poke around in the openings of the electronic module or insert anything
into them!
• Reinstall removed safety devices (such as module covers)!
WARNING
Risk of mains overload! An inadequate mains design can lead to system
failures and cable fires due to mains overload.
Short-term simultaneous operation of all pumps is possible in multi-pump opera-
tion.
Take multi-pump operation into account when designing the network, especially
with regard to the cable cross-sections and fuses used. Each drive must have its own
supply line with separate fuse protection!
CAUTION
Risk of material damage if the electronic module is not installed!
Normal operation of the pump is only permitted with the electronic module in-
stalled!
The pump must not be connected or operated without the electronic module being
installed!
WILO SE 2020-10
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