en
Installation and operating instructions • Wilo-Flumen OPTI-TR 50-3 ... 120-1, Wilo-Flumen EXCEL-TRE 50-3 ... 90-2 • Ed.01/2022-07
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•
Contractually adjust maintenance intervals depending on the actual environmental con-
ditions. Contact customer service.
•
If strong vibrations occur during operation, check the installation.
9.4.1
Maintenance intervals for normal
conditions
8000 operating hours or after 2 years
•
Visual inspection of the connection cables
•
Visual inspection of cable brackets and cable tensioning
•
Visual inspection of the mixer
•
Visual inspection of accessories
•
Function test of monitoring devices
•
Oil change
80000 operating hours or after 10 years
•
Complete overhaul
9.4.2
Maintenance intervals for harsh
conditions
Under the following operating conditions, shorten the specified maintenance intervals in
consultation with the customer service:
•
Fluids with long-fibre components
•
Highly corrosive or abrasive fluid
•
Strongly gassing fluids
•
Operation at an unfavourable duty point
•
Unfavourable flow conditions (e.g. due to fixtures or aeration)
If there are harsh operating conditions, it is recommended to conclude a maintenance con-
tract.
9.5
Maintenance measures
WARNING
Risk of injury from sharp edges!
Sharp edges can form on the propeller blades. There is a danger of cuts
and similar injuries!
• Wear protective gloves!
Before starting maintenance work, meet the following requirements:
•
Wear protective equipment! Observe the work regulations.
–
Safety shoes: Protection class S1 (uvex 1 sport S1)
–
Protective gloves: 4X42C (uvex C500 wet)
–
Safety goggles: uvex skyguard NT
For detailed marking of frame and disc, see the section on “Personal protective equip-
ment [
7]”.
•
The mixer has been thoroughly cleaned and disinfected.
•
Motor must have cooled down to the ambient temperature.
•
Workplace:
–
Clean, good lighting and ventilation.
–
Firm and stable work surface.
–
Secured against falling over and slipping.
CAUTION! Do not set the mixer down on the propeller! Provide an appropriate platform.
NOTICE! Only perform the maintenance work described in these installation and operat-
ing instructions.
9.5.1
Recommended maintenance meas-
ures
Regular inspection of current consumption and the operating voltage in all three phases is
recommended for smooth operation. In normal operation, these values remain constant.
Slight fluctuations depend on the characteristics of the fluid.
Current consumption can provide an early indication of damage to or malfunctions in the
mixer, which can then be rectified. Larger voltage fluctuations strain the motor winding and
can cause breakdown. Regular inspections can therefore largely prevent major secondary
damage and reduce the risk of total breakdown. In this regard, it is recommended to use re-
mote monitoring for regular inspections.
9.5.2
Rotating the propeller
✓
Protective equipment used!
✓
Mixer disconnected from mains.
