Wilo Yonos GIGA2.0-D, Installation And Operating Instructions Manual

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en Maintenance
200 WILO SE 2022-05
DANGER
Risk of fatal electrical shock!
Check for absence of voltage and cover or cordon off adjacent live parts.
18.2.1 Replacing the mechanical seal
There may be a slight amount of drip leakage during the running-in period. Even during
normal operation of the pump, it is normal for there to be slight leakage with the occa-
sional formation of drops.
A regular visual inspection is required. If leakage is clearly visible, replace the gasket.
For further information, see also Wilo Consulting guide for glanded pumps.
Wilo offers a repair kit which contains the necessary parts for replacement.
NOTICE
The magnets inside the motor do not pose a risk to persons with pacemakers
provided that the motor is not opened and the rotor is not dismantled. The mechan-
ical seal can be replaced without any risk.
Dismantling:
WARNING
Risk of scalding!
At high fluid temperatures and system pressures, allow the pump to cool down first
and then depressurise the system.
1. Disconnect the system from the power supply and secure it against being switched
on again without authorisation.
2. Close the shut-off devices upstream and downstream of the pump.
3. Make sure it is not live.
4. Earth the work area and short-circuit.
5. Disconnect mains connection cable. If present, remove the cable of the differential
pressure sensor on the DPS.
6. Depressurise the pump by opening the air vent valve (Fig. I, Item 28).
NOTICE
It is recommended to dismantle the module for better handling prior to dismantling
the motor impeller unit (see “Replacing the electronic module” [
} 204] section).
7. Leave two transport lugs (Fig. I, Item 30) on the motor flange.
NOTICE
If the threaded holes (Fig. II, Item 14b) are not present in the motor housing, it is not
necessary to move the transport lugs.
8. Attach motor impeller unit to the transport lugs with suitable lifting equipment for
protection (Fig. 6).
⇒ Version DN 32 ... DN 80, Fig. I
9. Remove the motor impeller unit (Fig. 100) from the pump housing by loosening the
flange screws (Fig. I, Item 29).
NOTICE
Avoid damaging the plastic parts such as the upper part of the module while attach-
ing the lifting equipment.