en Maintenance and repair
36 WILO SE 2019-01
tioned in the contract can be defined! If strong vibrations occur during operation, the
pump and the installation must be checked regardless of the defined maintenance in-
tervals.
9.5.1 Maintenance intervals for normal
conditions
8000operating hours or after 2years at the latest
ƒ Visual inspection of the connection cable
ƒ Visual inspection of accessories
ƒ Visual inspection of the coating and housing for wear
ƒ Function test of monitoring devices
ƒ Draining the leakage chamber
ƒ Grease lower roller bearings
ƒ Draining condensation water
ƒ Coolant change
ƒ Oil change sealing chamber (FKT 63.2 only)
NOTICE!If a sealing chamber control is installed, the oil is changed according to
the indicator!
15000operating hours or after 10years at the latest
ƒ General overhaul
9.5.2 Maintenance intervals for harsh
conditions
Under harsh operating conditions, specified maintenance intervals must be shortened if
required. Harsh operating conditions include:
ƒ Fluids with long-fibre components
ƒ Turbulent inlet (e.g. due to air intake, cavitation)
ƒ Strongly corroding or abrasive fluids
ƒ Heavily gas generating fluids
ƒ Operation at an unfavourable duty point
ƒ Pressure surges
When using pumps under hard conditions, it is recommended to sign a maintenance
contract. Contact customer service.
9.6 Maintenance measures
WARNING
Sharp edges on the impeller and suction port!
Sharp edges can form on the impeller and suction port. There is danger of limbs be-
ing severed! Protective gloves must be worn to protect from cuts.
WARNING
Hand, foot or eye injuries due to the absence of protective equipment!
Danger of (serious) injuries during work. Wear the following protective equipment:
• Safety gloves for protection against cuts
• Safety shoes
• Closed safety goggles
The following pre-requisites must be fulfilled prior to starting maintenance measures:
ƒ Pump cooled down to the ambient temperature.
ƒ Pump cleaned thoroughly and disinfected (if required).
9.6.1 Recommended maintenance
measures
Regular inspection of power consumption and the operating voltage in all three phases
is recommended for smooth operation. In normal operation, these values remain con-
stant. Slight fluctuations depend on the characteristics of the fluid. Power consumption
can provide an early indication of damage or malfunctions in the impeller, bearings or
motor, which can be rectified. Larger voltage fluctuations strain the motor winding and
can cause the pump to break down. Regular inspections can therefore largely prevent
major secondary damage and reduce the risk of total breakdown. In this regard, it is re-
commended to use remote monitoring for regular inspections.
9.6.2 Visual inspection of the connec-
tion cable
Check connection cable for:
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