Wilo -NL 32-125 Einbau- Und Betriebsanleitung Seite 30

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8.10 Shutting-down
Before shutting down close the valve on the
discharge side.
After shutting down, all valves may be closed.
The valves of the auxiliary optional pipework
connections, (quench, heating, external flush),
have to be closed in the last place. If there is a
risk of very low ambient temperatures, remove
the pump and then drain it using the threaded
plug 90.30.
WARNING!
When handling explosive, toxic, hot, crystalline
or corrosive media, ensure that people and the
environment are not endangered. Even if the
pump has been drained using the threaded plug
90.30, residues can remain in the pump. For
transport, the pump must be free from any dan-
gerous material.
In case of extended periods out of service, pro-
tect the pump against corrosion.
9. Maintenance, dismantling, assembly
9.1 Requirements
The pump or the pump set must have been shut
down in the manner described in chapter 8.10.
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9.2 Use of trained staff
CAUTION! Only appropriately trained and skilled
staff should undertake the work described in this
chapter.
Only authorised personnel must undertake elec-
trical work associated with maintenance of the
pump/pump set.
9.3 Safety measures
WARNING!
• For explosive, toxic, hot, crystalline as well as dif-
ferent pumping media ensure that people and
the environment are not endangered.
• Flush the pump with clean liquid before dismant-
ling.
• The working place for disassembly or assembly
must be clean.
• Before reinstallation, the pump must be free of
any dangerous material.
9.4 Maintenance and inspection
The pump requires only limited maintenance.
However it is advised of:
- Check frequently if the pump turns freely
without vibrations.
- Check driving alignment/pump frequently.
- Make sure every month that the mechanical seal
does not leaking.
- Check every week the leak-flow of the gland
packing.
- Please, refer to the motor instruction manual to
be informed about the maintenance planning
recommended by the manufacturer of this
equipment. (Items to be checked, ball bearing
lubrication schedule, and so on).
WILO AG 09/2007