Switching Off; Operation - Wilo CronoLine-IL Notice De Montage Et De Mise En Service

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8.1.2 Switching off

8.2

Operation

Fig. 48: Installed coupling guard metal
sheet
48
• Immediately after maintenance, all previously removed safety
devices, such as terminal box covers or coupling covers, must be
reinstalled.
• Close the shut-off device in the pressure pipe.
NOTE:
In case a non-return valve is installed in the pressure pipe, the shut-
off device can remain open insofar as a counter pressure is present.
CAUTION! Risk of property damage!
Risk of damage due to incorrect handling.
• When switching off the pump, the shut-off device in the inlet pipe
may not be closed.
• Switch off the motor and allow it to coast down completely. Ensure
the coasting is smooth.
• For longer downtimes, close the shut-off device in the inlet pipe.
• For longer periods of non-use and/or danger of freezing, drain the
pump and secure it against freezing.
• After removing the pump, keep it in a dry and dust-free storage.
NOTE:
The pump should always run smoothly and vibration-free and not be
operated in conditions other than those specified in the catalogue/
data sheet.
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
temperature), 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.
DANGER! Risk of fatal injury!
Due to protective equipment in the coupling area which has not
been installed, contact with rotating parts can lead to deadly
injuries.
• Immediately after maintenance, all previously removed safety
devices, such as terminal box covers or coupling covers, must be
reinstalled.
• The pump may only be operated with the coupling guard metal
sheets installed (Fig. 48, item 3).
• Depending on the different operating conditions and the degree
of installation's automation, the pump can be switched on and off
3
in different ways. Observe the following:
• Stop procedure:
• Start procedure:
- Prevent return flow to the pump.
- Do not work too long with an insufficient
volume flow.
- Be sure that the pump is completely filled up.
- Do not work too long with an insufficient
volume flow.
- Larger pumps require a minimum flow rate 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 08/2016