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8
Maintenance instructions
30
respective applicable temperature class and on the increase in heat in
the pump.
Specifications concerning the maximum permitted temperature of
the fluid as a function of fluid, mechanical seal, motor speed, tem-
perature class conveyed and pressure can be found in chapter 5.2
"Authorised operating conditions" on page 23.
Considerably higher temperatures could occur in the event of incor-
rect operation and/or malfunctions. The specifications contained in
chapter 7 "Operating instructions" on page 27 are to be noted in this
regard.
In the case of mechanical seals, the permitted temperature limits
could be exceeded because of dry running. Dry running can not
only occur with insufficiently filled sealing chambers, but also with
excessively high percentages of gas in the fluid. The operation of
the pump outside of the permitted operating range can also lead to
a dry run.
Mechanical seals are to be checked regularly for leakage.
In addition to a number of other factors, the operational reliability and
service life of the pump are also dependent on correct maintenance
and repair work.
The maintenance regulations contained in the installation and oper-
ating instructions for the pump series, the motor and the mechanical
seal are to be observed in addition to the maintenance instructions
listed below for these supplementary installation and operating
instructions.
The following basic principles are to be observed:
• Perform the prescribed maintenance and inspection tasks on schedule.
• Inform operating personnel before beginning maintenance and repair
work.
• Secure all of the system parts and operating fluids upstream and
downstream from the machine against unsupervised commissioning.
• Switch the machine voltage-free for all maintenance, inspection and
repair work. Secure the main switch against being unexpectedly
switched back on.
• Lock a the main switch and remove the key.
• Hang up a sign warning against switching on again.
• Observe safety regulations for the fluid to be pumped.
• Consult the Safety data sheet and other sources for personal safety
measures.
• Exclude hazards caused by contact or breathing in dangerous liquids,
gases, mists, vapours and dusts by implementing appropriate pro-
tective measures.
• Fasten and secure larger-sized assemblies carefully to hoisting gear
when replacing them.
• Replace deficient machine parts immediately.
• Check screwed connection for firm placement, observe torques.
Check functioning of protective devices after completion of the
maintenance tasks.
Wilo recommends that Wilo personnel perform first-time repair work
on the pump. Your own maintenance personnel can be trained at the
same time this is done. Wilo also recommends the compilation of a
maintenance schedule.
Observe chapter 6 "Instructions concerning installation and commis-
sioning" on page 26 for renewed commissioning following completion
of maintenance or repair work. All liability and warranties on the part
of WILO SE are excluded for damages resulting from the use of non-
original spare parts.The following special features are to be observed:
WILO SE 10/2013
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