Maintenance and repair
en
Installation and operating instructions Wilo-EMU FA + FK 17.1, FK 202, FK 34, FK 42
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9.4.2
Grease
Use the following grease in accordance with DIN 51818/NLGl class 3:
▪ Esso Unirex N3
▪ Tripol Molub-Alloy-Food Proof 823 FM
With “USDA-H1” approval
9.4.3
Filling quantities
Refer to the supplied configuration for the filling quantities.
9.5
Maintenance intervals
To ensure reliable operation, maintenance tasks must be carried out regularly. Depend-
ing on the real ambient temperatures, maintenance intervals different from those men-
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
8000 operating hours or after 2 years at the latest
▪ Visual inspection of the power supply cable
▪ Visual inspection of accessories
▪ Visual inspection of the coating and housing for wear
▪ Function test of monitoring devices
▪ Oil change
– Motor compartment
– Sealing chamber
NOTICE! If sealing chamber control is installed, the oil is changed according to the
indicator!
15000 operating hours or after 10 years at the latest
▪ 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:
▪ Fluids with long-fibre components
▪ Turbulent inlet (e.g. due to air intake, cavitation)
▪ Strongly corroding or abrasive fluids
▪ Heavily gas generating fluids
▪ Operation at an unfavourable duty point
▪ 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 cut-off! Protective gloves must be worn to protect from cuts.
WARNING
Hand, foot or eye injuries due to lack of protective equipment!
Danger of (serious) injuries during work. Wear the following protective equipment:
• Safety gloves against cuts
• Safety shoes
• Closed safety goggles
The following pre-requisites must be fulfilled prior to starting maintenance measures:
▪ Pump cooled down to the ambient temperature.
▪ 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
