Wilo Atmos GIGA-B, Installation And Operating Instructions Manual

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en Maintenance
58 WILO SE 2022-06
3
Fig. 8: Installed coupling guard
The pump can be switched on and off in different ways. This depends on the different
operating conditions and the degree of automation of the installation. Observe the fol-
lowing points:
Stop procedure:
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Prevent return flow to the pump.
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Do not work too long with too low a volume flow.
Start procedure:
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Make sure that the pump is completely filled up.
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Do not work too long with too low a volume flow.
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Larger pumps require a minimum flow rate amount to operate properly.
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Operating against a closed shut-off device can lead to overheating in the centrifu-
gal chamber and to damage of the shaft seal.
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Ensure a continual flow to the pump with a sufficiently large NPSH.
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Prevent insufficient counter pressure leading to a motor overload.
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To avoid significant increases in motor temperature and excessive load on the
pump, coupling, motor, gaskets and bearings, perform no more than 10 switch-on
procedures per hour.
10 Maintenance
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Maintenance tasks: The technician must be familiar with the use of operating fluids
and their disposal.
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Electrical work: Electrical work must be performed by a qualified electrician.
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Installation/dismantling work: The installation/dismantling must be carried out by a
qualified technician who is trained in the use of the necessary tools and fixation
materials.
It is recommended to have the pump serviced and checked by the Wilo customer ser-
vice.
DANGER
Risk of fatal injury due to electrical current!
Improper conduct when carrying out electrical work can lead to death due to electric
shock!
• Any work on electrical devices may only be carried out by a qualified electrician.
• Before carrying out any work, disconnect the unit from the power supply and se-
cure it against accidental switch-on.
• Any damage to the pump connection cable should only ever be rectified by a
qualified electrician.
• Follow the installation and operating instructions for the pump, level control
device and other accessories.
• Never poke around in the motor openings or insert anything into them.
• After completing the work, refit previously dismantled protective devices, for ex-
ample, terminal box covers or coupling covers.
DANGER
Risk of fatal injury from falling parts!
The pump itself and pump parts can be extremely heavy. Falling parts pose a risk of
cuts, crush injuries, bruises or impacts, which can be fatal.
• Always use suitable lifting equipment and secure parts against falling.
• Never stand underneath a suspended load.
• During storage and transport, as well as before all installation and assembly work,
ensure that the pump is in a safe position and standing securely.
DANGER
Risk of fatal injury due to ejected tools!
The tools used during maintenance work on the motor shaft can be thrown away if
they come into contact with rotating parts. Injuries and even death are possible!
• The tools used during maintenance work must be removed completely before the
pump is started up!