Maintenance/Service - Wilo BAC Einbau- Und Betriebsanleitung

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8.2 Commissioning
9

Maintenance/Service

28
NOTE
To prevent the pump from accidentally priming while the full water
level has not been reached, we recommend protecting it with a suit-
able device (dry running protection or float switch).
WARNING! Risk of injury!
• Installation must be designed in order that no one could be hurt in
case of fluid leakage (mechanical seal failure...).
CAUTION! Possible damage of the pump!
The pump must not be operated at zero flow (closed discharge
valve) for more than ten minutes.
• We recommend establishing a minimum flow of about 10 % of the
rated capacity of the pump, to avoid the formation of a gas pocket.
• Use a pressure gauge to check the stability of the discharge pressure;
if it is unstable, vent the pump again or perform the filling operation.
CAUTION! Risk of motor overload!
• Check that the input current does not exceed the value marked on
the motor rating plate.
Maintenance and repairs may only be carried out by qualified
experts!
It is recommended to have the pump serviced and checked by Wilo-
Customer Service.
DANGER! Risk of fatal injury!
There is a mortal danger through shock when working on electrical
equipment.
• Work on electrical equipment may only be done by electricians
approved by the local electricity supplier.
• Before working on electrical equipment, switch it off and prevent
it from being switched on again.
• Any damage to the connecting cable should always be rectified by
a qualified electrician only.
• Follow the installation and operating instructions for the pump,
level control device and other accessories.
• After maintenance, all safety devices such as terminal box cover
that were removed must be reinstalled!
DANGER! Risk of fatal injury!
The pump itself and the parts of pump can be extremely heavy.
Falling parts pose a risk of cuts, crush injuries, bruises or impacts,
which may lead to death.
• Always use suitable lifting equipment and secure parts against fall-
ing.
• Never stand underneath a suspended load.
• Make sure the pump is securely positioned and is stable during
storage and transport as well as prior to all installation and other
assembly work.
DANGER! Risk of burns or freezing to the pump when body parts
come into contact with the pump!
Depending on the pump or system operating conditions (fluid tem-
perature), the entire pump can become very hot or very cold.
• Keep a safe distance during operation!
• In the case of high water temperatures and system pressures, allow
the pump to cool down before all work.
• Always wear protective clothing, protective gloves and protective
goggles when working.
• No special servicing while the pump is in operation.
WILO SE 11/2013