10. Maintenance and service
DANGER
Electric shock
Death or serious personal injury
‐ Before starting any work on the product, make sure that the power supply is switched off and it cannot be switched on
unintentionally.
CAUTION
Crushing hazard
Minor or moderate personal injury
‐ Make sure the pump cannot roll or fall over.
DANGER
Electric shock
Death or serious personal injury
‐ Make sure the pump is grounded.
CAUTION
Sharp element
Minor or moderate personal injury
‐ Be careful of sharp edges. Wear protective gloves.
Maintenance and service must be carried out by qualified persons.
Before carrying out maintenance and service, make sure that the pump is thoroughly flushed with clean water. Rinse the pump parts after
dismantling.
Change the motor liquid after 12.000 operating hours or 3 years, whichever comes first.
Frequency converter use may reduce the lifespan of the bearings and the shaft seal, depending on the operating mode and other
circumstances.
When the pump is new or after replacement of the shaft seals, check the motor liquid level and its water content after one week of
operation. If the motor liquid level has dropped, the shaft seal may be defective.
Pumps running normal operation must be inspected every 12.000 operating hours or once in 3 years.
Check the following during inspection:
• Power consumption
• Motor liquid (glycol) level.
Disposal of the motor liquid must comply with local regulations.
• Cable entries: Make sure that the cable entries are waterproof and the cables are not sharply bent or pinched.
• Impeller clearance: Check the impeller clearance.
• Pump parts: Check the pump housing and other parts for possible wear. Replace defective parts.
• Ball bearings: Check the shaft for noisy or heavy operation; turn the shaft manually. Replace defective bearings. A general overhaul of the
pump is usually required in case of defective bearings or poor motor function. This work must be carried out by an authorised service
workshop. Bearings are lubricated for lifetime.
• Vibration: If the pump is vibrating at an abnormal level, do not restart the pump until the cause of the fault is identified and eliminated.
• General maintenance: It is usually required in case of defective ball bearings or poor motor function. This work must be carried out by an
authorised service workshop.
10.1
Drain leakage chamber on SL pumps
Drain the leakage chamber after 12.000 operating hours or three years, whichever comes first.
Normal leakage rate for the shaft seal is 2.000 ml / 12.000 operating hours. If more than 5.000 ml fluid can be drained from the
leakage chamber, the shaft seal must be replaced.
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English (GB)
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