Maintenance - Wilo CronoLine-IL 250 Série Notice De Montage Et De Mise En Service

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Fig. 38: Installed coupling protection metal
sheet
9

Maintenance

Safety
38
• The pump may only be operated with the coupling protection metal
sheets installed (Fig. 38, Item 3).
• Depending on the different operating conditions and the degree of
installation's automation, the pump can be switched on and off in dif-
ferent ways. Observe the following:
3
• Stop procedure: - Prevent return flow to the pump.
• Start procedure: - Be sure that the pump is completely filled up.
• To prevent significant increases in motor temperature and excessive
strain on the pump, coupling, motor, seals and bearings, no more than
10 switch-on procedure should be performed per hour.
Have maintenance and repair work carried out by qualified
personnel only.
It is recommended to have the pump serviced and checked by Wilo-
Customer Service.
When drafting a maintenance plan, expensive repairs can be avoided
and a fault-free operation of the system can be achieved with
a minimum of maintenance effort.
DANGER! Danger of death!
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.
• Never use an object to poke around the openings on the module or
motor and never insert anything into the module or motor.
• Follow the installation and operating instructions for the pump,
level control and other accessories.
DANGER! Danger of death!
Failure to install safety devices on the terminal box or near the
coupling can cause electrical shock or contact with rotating parts,
potentially resulting in life-threatening injuries.
• Immediately after maintenance, all previously removed safety
devices, such as terminal box covers or coupling covers, must be
reinstalled.
DANGER! Danger of death!
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.
- Do not work too long with an insufficient vol-
ume flow.
- Do not work too long with an insufficient vol-
ume flow. Larger pumps require a minimum flow
amount to operate properly. Operating against
a closed slide valve can lead to overheating in
the centrifugal chamber and to damage of the
shaft seal.
- Ensure a continual flow to the pump with
a sufficiently large NPSH.
- Prevent insufficient counter pressure leading to
a motor overload.
WILO SE 11/2013