Maintenance Intervals; Maintenance Tasks - Wilo Sub TWI 4 Serie Einbau- Und Betriebsanleitung

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8 Maintenance
Before performing maintenance or repair work, switch
off and dismount the product as described in the
chapter entitled "Final shutdown/disposal".
After completing maintenance or repair work, the
product must be installed and connected according to
the "Installation" chapter. The product must be
switched on as described in the "Start-up" chapter
Maintenance or repair work must be carried out by an
authorized service center, Wilo customer service or a
qualified specialist.
Maintenance or repair work and/or construc-
tional changes that are not listed in this operat-
ing and maintenance manual may only be carried
out by the manufacturer or by authorized ser-
vice centers.
Risk of fatal injury due to electrical current!
There is a risk of fatal electric shocks when per-
forming work on electrical devices. With all main-
tenance or repair work, the unit must be
disconnected from the mains and secured
against being switched on again without permis-
sion. Damage to the power supply cable may
only be rectified by a qualified electrician.
Note the following information:
• This manual must be available to the maintenance per-
sonnel and its instructions must be followed. Only the
repair and maintenance measures listed here may be
performed.
• All maintenance, inspection and cleaning work on the
machine and the system may only be carried out by
trained specialists exercising extreme care in a safe
workplace. Proper protective clothing is to be worn.
The machine must be disconnected from the electrical
system and secured against being switched on again. It
must be prevented from being switched on inadver-
tently.
• When carrying out work in basins and/or containers,
the respective local protection measures must be
observed in all cases. A second person must be present
for safety reasons.
• Only hoisting gear that is in a technically perfect condi-
tion and load-carrying equipment that has been offi-
cially approved may be used for lowering and raising
the product.
Make sure that all fastening devices, ropes and
safety devices of the hoisting gear are in a tech-
nically perfect condition. Work may only com-
mence if the hoisting gear is in perfect working
order. If it is not inspected, fatal injuries may
result.
• Electrical work on the product and system must be car-
ried out by an electrician. Defective fuses must be
replaced. Under no circumstances are they to be
repaired. Only fuses at the specified current and of the
prescribed type may be used.
• When working with inflammable solvents and cleaning
agents, fires, unshielded lighting and smoking are pro-
hibited.
• Products that circulate fluids hazardous to health, or
that come into contact with these fluids, must be
40
decontaminated. It must be ensured that no danger-
ous gases can form or are present.
If injuries involving hazardous pumping liquids or
gases occur, first-aid measures must be per-
formed in accordance with the notices in the
workplace and a doctor must be called immedi-
ately.
• Ensure that all necessary tools and materials are avail-
able. Tidiness and cleanliness guarantee safe and trou-
ble free operation of the product. After working on the
unit, all cleaning materials and tools should be removed
from it. All materials and tools should be stored in an
appropriate place.
• Lubricants, such as oil and grease, must be collected in
suitable vessels and disposed of properly (in accor-
dance with the 75/439/EEC directive and with §§5a, 5b
AbfG). Appropriate protective clothing is to be worn for
cleaning and maintenance jobs. This is to be disposed
of in accordance with waste code TA 524 02 and EC
Directive 91/689/EEC.
Also observe the local laws and regulations!
• Only lubricants expressly recommended by the manu-
facturer may be used. Oils and lubricants should not be
mixed.
• Only use genuine parts made by the manufacturer.
8.1 Lubricants
The motor is filled with a water-glycol mixture, which
is biodegradeable. Inspection of the mixture and filling
level must be performed by the manufacturer.

8.2 Maintenance intervals

Overview of the maintenance intervals needed:
8.2.1 Before initial start-up or after a longer period of
storage
• Check the insulation resistance
• Functional inspection of safety and control devices

8.3 Maintenance tasks

8.3.1 Checking the insulation resistance
To check the insulation resistance, the power supply
cable must be disconnected. The resistance can then
be measured with an insulation tester (measuring volt-
age = 1,000 V). The following values may not be
exceeded:
• For the initial start-up: Minimum insulation resis-
tance 20 M:.
• For further measurements: Value must be greater
than 2 M:.
If the insulation resistance is too low, moisture
may have penetrated the cable and/or the motor.
Do not connect the machine, consult manufac-
turer!
8.4 Functional inspection of safety and monitoring
devices
Monitoring devices include temperature sensors in the
motor, sealed volume monitors, motor protection
relays, overvoltage relays, etc.
WILO SE 10/2011 V4.1WE