Replacing The Mechanical Seal - Wilo -Stratos GIGA2.0-I Einbau- Und Betriebsanleitung

19.2.1

Replacing the mechanical seal

Installation and operating instructions • Wilo-Stratos GIGA2.0-I, Wilo-Stratos GIGA2.0-D • Ed.02/2022-07
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 occasional
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 pose no risk to persons with pacemakers,
provided that the motor is not opened and the rotor is not dismantled.
The mechanical 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. Loosen the screws of the electronic module (Fig. I, Item 3) and remove the upper part
of the electronic module (Fig. I, Item 2).
6. Disconnect mains connection cable. If present, remove the cable of the differential
pressure sensor on the electronic module or on the plug connection of the differential
pressure sensor.
7. 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 mod-
ule" [} 232] section).
8. 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.
NOTICE
If the threaded holes (Fig. II/III, Item 14b) are not present in the motor
housing, it is not necessary to move the transport lugs.
9. Attach motor impeller unit to the transport lugs with suitable lifting equipment for
protection (Fig. 6).
10. Loosen and remove the screws (Fig. I/III, Item 29).
⇒ We recommend to use two mounting bolts (accessories) instead of two screws
(Fig. I/III, Item 29). The installation bolts are screwed diagonally to each other
en
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