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Maintenance and repair
28
WILO GVA GmbH 2019-02
5. Flush dirt residues from the floor into the drain.
6. Leave the mixer and other components to dry.
9
Maintenance and repair
DANGER
Risk of death due to electrocution!
Improper conduct when carrying out electrical work can lead to death due to electric
shock! Electrical work must be carried out by a qualified electrician in accordance
with the locally applicable regulations.
NOTICE
Take note of additional literature!
To ensure proper use, additionally read and observe the manufacturer instructions.
ƒ
Only carry out the maintenance tasks described in these installation and operating
instructions.
ƒ
Decommission the mixer before carrying out maintenance tasks; see Decommission-
ing [
}
25].
9.1
Personnel qualifications
ƒ
Electrical work: A qualified electrician must carry out the electrical work.
ƒ
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 mech-
anical engineering.
9.2
Operator responsibilities
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Provide the necessary protective equipment and make sure that the personnel wears
it.
ƒ
Collect operating fluids in suitable tanks and dispose of properly.
ƒ
Dispose of protective clothing used in accordance with regulations.
ƒ
Use only original parts of the manufacturer. Use of parts other than the original parts
releases the manufacturer from any liability.
ƒ
Collect any leakage of fluid and operating fluid immediately and dispose of it ac-
cording to the locally applicable guidelines.
ƒ
Provide the tools required.
ƒ
If flammable solvents and cleaning agents are used, open flames, naked lights and
smoking are prohibited.
9.3
Operating fluid
9.3.1
Oil types and filling quantities
The gear is filled with gear oil. The type of oil used and the filling quantity is marked on
the drive unit’s rating plate. For further information on oil types, consult the manufac-
turer’s instructions.
9.3.2
Grease
Use a
water-insoluble
grease for lubrication.
9.4
Maintenance intervals
To ensure reliable operation, maintenance tasks must be carried out regularly. Depend-
ing on the real ambient temperatures, maintenance intervals different to those men-
tioned in the contract can be established! If strong vibrations occur during operation,
the mixer and the installation must be checked regardless of the established mainten-
ance intervals.
9.4.1
Maintenance intervals for normal
conditions
Maintenance measures
Interval
Perform on
Check the insulation resistance of the
motor winding.
*
Drive unit
Check the oil level in the gear.
*
Drive unit
Check the gaskets.
*
Drive unit
Check the impermeability of the ter-
minal box.
*
Drive unit
Conduct visual inspection for wear
Annually
Drive unit, mixer shaft, hub,
propeller
