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30 Installation and operating instructions • Wilo-Yonos MAXO/-D/-Z • Ed.01/2022-08
DANGER
Risk of fatal electrical shock!
There is a risk of fatal injury from electric shock when working on electrical devices.
• Work on electrical components may only be carried out by qualified electricians!
• Switch off the voltage on all-poles of the pump and secure against unauthorised restart!
• Always switch off the power supply from the pump and if necessary SSM!
– Due to the presence of dangerous contact voltage, work on the module must not be
started until 5minutes have elapsed!
• Check whether all connections (even potential-free contacts) are voltage-free!
• The pump may still be live even in voltage-free state. The rotor induces a contact voltage,
which is also present at the motor contacts. Close the existing shut-off valves in front of
and behind the pump!
• If the control module/Wilo plug is damaged, the pump must not be put into operation!
• In case of impermissible removal of operating elements on the control module, there is a
risk of electrical shock if inner electrical components are touched!
WARNING
Risk of burns when touching the pump/system
Depending on the operating status of the pump and the system (fluid temperature), the entire
pump can get very hot.
• Allow the system and pump to cool to room temperature!
9.2 Dismantling/installation
Before any dismantling/installation operation, make sure that the “Shutdown” chapter has been taken into
consideration!
WARNING
Risk of burns when touching the pump/system
Depending on the operating status of the pump and the system (fluid temperature), the entire
pump can get very hot.
• Allow the system and pump to cool to room temperature!
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