en
Maintenance and repair
38
WILO SE 2021-07
5. Rinse the strainer and baseplate of the hydraulics with
clear water and remove solids manually.
6. Position the strainer.
7. Screw in the fastening screws.
Max. tightening torque:
5.5 Nm (4 ft·lb)!
▶ Strainer cleaned and fitted. Complete the cleaning work.
9
Maintenance and repair
9.1
Personnel qualifications
ƒ
Electrical work: qualified electrician
Person with appropriate technical training, knowledge and ex-
perience who can identify and prevent electrical hazards.
ƒ
Maintenance work: trained sewage technology professional
Application/disposal of operating fluids used, basic engineer-
ing knowledge (installation/dismantling)
9.2
Operator responsibilities
ƒ
Provide the necessary protective equipment and make sure
that the personnel wears it.
ƒ
Collect operating fluids in suitable tanks and dispose of prop-
erly.
ƒ
Dispose of protective clothing used in accordance with regu-
lations.
ƒ
Use only original parts of the manufacturer. The use of any
non-original parts releases the manufacturer from any liability.
ƒ
Collect any leakage of fluid and operating fluid immediately
and dispose of it according to the locally applicable guidelines.
ƒ
Provide the tools required.
ƒ
If flammable solvents and cleaning agents are used, fire, naked
flames and smoking are prohibited.
ƒ
Document maintenance tasks in the system’s inspection list.
9.3
Operating fluid
9.3.1
Oil types
ƒ
ExxonMobile: Marcol 52
ƒ
ExxonMobile: Marcol 82
ƒ
Total: Finavestan A 80 B (NSF-H1 certified)
9.3.2
Filling quantities
The filling quantity is 1200 ml (40 US.fl.oz).
9.4
Maintenance intervals
ƒ
Regularly carry out maintenance tasks.
ƒ
Contractually adjust maintenance intervals depending on the
actual environmental conditions. Contact customer service.
ƒ
If strong vibrations occur during operation, check the installa-
tion.
9.4.1
Maintenance intervals for normal conditions
1500 operating hours or after 5 years
ƒ
Visual inspection of the connection cables
ƒ
Visual inspection of accessories
ƒ
Visual inspection of the coating and housing
ƒ
Function test of monitoring devices
ƒ
Sealing chamber oil change
ƒ
Adjusting the impeller clearance
5000 operating hours or after 10 years
ƒ
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:
ƒ
Fluids with long-fibre components
ƒ
Turbulent inlet (e.g. due to air entry, cavitation)
ƒ
Highly corrosive or abrasive fluids
ƒ
Strongly gassing fluids
ƒ
Operation at an unfavourable duty point
ƒ
Pressure surges
If there are harsh operating conditions, it is recommended to
conclude a maintenance contract.
9.5
Maintenance measures
WARNING
Risk of injury from sharp edges!
Sharp edges can form on the impeller and suction
port. There is a danger of cuts and similar injuries!
• Wear protective gloves!
Before starting maintenance work, meet the following require-
ments:
ƒ
Wear protective equipment! Observe the work regulations.
–
Safety shoes: Protection class S1 (uvex 1 sport S1)
–
Protective gloves: 4X42C (uvex C500)
–
Safety goggles: uvex skyguard NT
For detailed marking of frame and disc, see the section on
“Personal protective equipment [
}
25]”.
ƒ
The pump has been thoroughly cleaned and disinfected.
ƒ
Motor must have cooled down to the ambient temperature.
ƒ
Workplace:
–
Clean, good lighting and ventilation.
–
Firm and stable work surface.
–
Secured against falling over and slipping.
NOTICE! Only perform the maintenance work described in
these installation and operating instructions.
9.5.1
Visual inspection of the connection cable
Check connection cable for:
ƒ
Bubbles
ƒ
Cracks
ƒ
Scratches
ƒ
Abrasion
ƒ
Pinch points
If the connection cable is damaged:
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