Maintenance - Wilo MVI 2..-6 Betriebsanleitung

– If there is a build up of steam, this should be allowed to escape by
carefully opening the vent screw.
The pump, including the motor, may reach operating
temperatures of >100 °C, so care should be taken when
touching the pump.

7. Maintenance

Before carrying out any maintenance work, switch off the
unit and ensure that it cannot be switched on again by
unauthorized people. Never carry out work on a running
pump.
– During the running-in period, there may be some dripping from the
axial face seal. Should a more significant leak occur as a result of
substantial wear, have the axial face seal replaced by a specialist.
– Increased bearing noise and unusual vibrations indicate a worn
bearing. In this case, have the bearing replaced by a specialist.
– If the pump is exposed to frost, the pump and pipework must be
emptied in the cold season. Close the isolating valve and open the
drain valve (Fig. 2, 6) and the vent screw (Fig. 2, 5) of the pump.
The isolating valve must be closed before the drain valve
is opened.
– If placed in a frost-free location, the pump does not have to be
emptied, even if it is out of service for a long period.
Figures:
1. Cross-section of the pump
2. Whole assembly in inlet phase with reference numbers
3. Drawing showing principal dimensions
4. Terminal connection plans
ENGLISH
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