zh-CHS
Maintenance/repair
78
WILO SE 2020-10
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Spray the interior of the pump with a preservative through the suction and discharge
ports.
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Close the suction and discharge ports with caps.
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Grease or oil the blank components. For this, use silicone-free grease or oil. Observe
the manufacturer’s instructions for preservatives.
9
Maintenance/repair
It is recommended to have the pump serviced and checked by the Wilo customer
service.
Maintenance and repair work require the pump be partially or completely dismantled.
The pump housing can remain installed in the piping.
危险
Risk of fatal injury due to electrical current!
Improper conduct when carrying out electrical work can lead to death due to electric
shock!
• Any work on electrical devices may only be carried out by a qualified electrician.
• Before all work on the unit, deactivate the power supply and guard against
accidental switch-on.
• Any damage to the pump connection cable should only ever be rectified by a
qualified electrician.
• Observe the installation and operating instructions for the pump, motor and
other accessories.
• Reinstall any uninstalled safety devices, such as terminal box covers, once the
work is complete.
警告
Sharp edges on the impeller!
Sharp edges can form on the impeller. There is danger of limbs being severed!
Protective gloves must be worn to protect against cuts.
9.1
Personnel qualifications
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Electrical work: A qualified electrician must carry out the electrical work.
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Maintenance tasks: The technician must be familiar with the use of operating fluids
and their disposal. In addition, the technician must have basic knowledge of
mechanical engineering.
9.2
Operation monitoring
小心
Risk of property damage!
Improper operation can damage the pump or motor. Operating with the shut-off
device closed for more than 5 minutes is not recommended and generally dangerous
in the case of hot fluids.
• Never allow the pump to run without fluid.
• Do not operate the pump with the shut-off device in the suction line closed.
• Do not operate the pump for a longer period of time with the shut-off device in
the pressure pipe closed. This can cause the fluid to overheat.
The pump must run quietly and vibration-free at all times.
The rolling bearings must run quietly and vibration-free at all times.
Increased current consumption with unchanged operating conditions is a sign of
bearing damage. The bearing temperature may be up to 50°C above the ambient
temperature, but never rise above 80°C.
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Check the static gaskets and the shaft seal regularly for leakages.
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For pumps with mechanical seals, there is little to no visible leakage during
operation. If a gasket is leaking significantly, this is a sign that the gasket surfaces
