Air Supply; Maintenance Tasks; Replacing The Mechanical Seal - Wilo Stratos GIGA2.0-I Notice De Montage Et De Mise En Service

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19.1

Air supply

19.2

Maintenance tasks

19.2.1

Replacing the mechanical seal

260
Maintenance
After completion of all maintenance work, reattach the fan cover with the screws
provided so that the motor and the electronic module are sufficiently cooled.
Check the air supply to the motor housing and electronic module at regular intervals.
Dirt impairs the cooling of the motor. If necessary, remove dirt and restore unrestricted
air supply.
DANGER
Risk of fatal injury from falling parts!
Falling pumps or individual pump components may result in life-threatening injuries!
• During installation work, secure pump components against falling down with
suitable lifting gear.
DANGER
Risk of fatal electrical shock!
Check for absence of voltage and cover or cordon off adjacent live parts.
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" [} 265] section).
7. Remove the two transport lugs (Fig. I, Item 30) from the motor flange (Fig. I//II/III,
Item 14a) and attach them to the motor housing (Fig. II/III, Item 14b) with the same
screws.
WILO SE 2021-12