Maintenance Work - Wilo Emu Fa+T Einbau- Und Betriebsanleitung

MAINTENANCE AND REPAIR
• Unfavourable duty points
• Operation at risk from water hammers
8.2.3. Recommended maintenance measures to en-
sure smooth operation
We recommend regular inspections of the current
consumption and the operating voltage in all
phases. In normal operation, these values remain
constant. Slight fluctuations depend on the char-
acteristics of the fluid. The current consumption
can provide an early indication of damage and/
or malfunctions in the impeller, bearings and/or
motor, which can be rectified. Larger voltage fluc-
tuations 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.
We recommend the use of remote monitoring for
regular inspections. Please contact Wilo customer
service.

8.3. Maintenance work

Before carrying out maintenance work:
• Disconnect the pump from the power and secure
it against being switched on inadvertently.
• Allow the pump to cool down and clean it thor-
oughly.
• Immediately wipe up any drips!
• Make sure that all the operationally-relevant
parts are in good condition.
8.3.1. Visual inspection of the power supply cable
The power supply cables must be checked for
blisters, cracks, scratches, abrasion and/or crush-
ing. If any damage is detected, the pump must be
decommissioned immediately and the damaged
power supply cable must be replaced.
The cables may only be replaced by Wilo cus-
tomer service or an authorised or certified ser-
vice workshop. The pump may only be started
Overview of maintenance work depending on the motor used
Maintenance work
Visual inspection of the power supply cables
Visual inspection of accessories
Visual inspection of the housing for wear
Functional inspection of all safety and moni-
toring devices
Inspection of the switchgear and relays used
Oil change
Empty the leakage chamber
Grease roller bearings
Drain condensation water
Legend
- = Maintenance work must not be carried out
• = Maintenance work must be carried out
Installation and operating instructions Wilo-EMU FA + T-Motor
8.3.2. Visual inspection of accessories
8.3.3. Visual inspection of the housing for wear
8.3.4. Functional inspection of safety and monitoring
• Motor protection relays and other triggers can
• To check the pencil electrode or the temperature
T 12 T 13 T 17 T 20 T 20.1 T 24 T 30 T 34 T 42
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up again once the damage has been properly
remedied.
Accessories must be checked to ensure they are
properly fitted and function correctly. Loose and/
or faulty accessories must be repaired or replaced
immediately.
The housing parts are not allowed to have any
apparent damage. If there is visible damage to
housing parts, contact Wilo customer service.
devices
Monitoring devices include the temperature sen-
sors in the motor, humidity electrodes, overload
relay, overvoltage relay, etc.
generally be triggered manually for test purposes.
sensor, the pump has to be cooled to the ambient
temperature and the electrical connection for the
monitoring equipment has to be disconnected in
the switchgear. Use an insulation tester (measur-
ing voltage 500 V) to check the resistance of the
monitoring device.
The following values should be measured:
• Bimetallic strip: Value = '0' passage
• PTC thermistor sensor: A PTC thermistor sensor
has a cold resistance of between 20 and 100 Ω.
If there are 3 sensors in series, this results in a
value of 60 to 300 Ω.
If there are 4 sensors in series, this results in a
value of 80 to 400 Ω.
• Pt100 sensor: Pt100 sensors have a value of
100 Ω at 0 °C. Between 0 °C and 100 °C, this
value increases by 0.385 Ω every 1 °C. At an
Motor type
T 49
T 56
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English
T 50
T 50.1 T 63.2
T 57 T 72
T 63.1
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