Dismantling Procedure; Re-Assembly; Commissioning - Wilo TOP Serie Instrucciones De Instalación Y Funcionamiento

ENGLISH
– protect electrical components from drain water.
– Take care when undoing the Allen screws at the
motor flange; depending on system temperature
and pressure, hot liquid or vapour can forcefully
erupt.
Grave risks of scalding !

4. Dismantling procedure

4.1 Existing Motor
– Undo and remove the four fixing screws (5.3) and
remove the module cover (5.1).
– Remove wiring connections to terminals (not
illustrated).
– Undo the PG gland nut at the motor module box.
– Remove power cable.
– Undo the four Allen (1.1) screws and extract
motor head from pump housing 6).
4.2 Module
– Undo the earth screw (5.4) and the two fixing
screws (5.7) and remove the module base (5.2).
4.3 Impeller
– Remove circlip (2.2).
– Extract the impeller (2.1).
4.4 Rotor Unit/Stator Unit
– Remove cover plate (4.1) at rear end of Stator
housing (4).
– Set auxiliary tool against vent plug (3.1) and
press-out the rotor unit (3).
5.6 Screw Torque Exertion Levels
Glands/Screws
Cable gland (5.8)
Terminal screws
Terminal box base (5.4/5.7)
Terminal cover screws (5.3)
Internal hexagon screws (1.1)

6. Commissioning

6.1 Fill and Vent Procedure
Carefully refill and vent the pipe system. The pump
rotor space will be automatically vented after a short

5. Re-assembly

5.1 Stator Unit
– Affix type stickers, one at the rear end below the
cover plate and the other above the side name
plate (Fig. 2).
5.2 Rotor Unit
– Press home into stator unit (4).
5.3 Impeller
– Fully push home impeller onto the rotor shaft (3.2)
(Fig. 1)
and secure with new circlip (2.2).
ATTENTION!
5.4 Module
– Insert module base (5.2) at right angle into stator
housing (4).
– Securely fix earth screw (5.4) + spring washer
(5.5) + serrated washer (5.6) and the two fixing
screws (5.7).
– Place module cover (5.1) onto module base and
secure with the four fixing screws (5.3).
5.5 Exchange Motor
– Place new O-ring (1.2) twist-free onto the edge of
the can flange (3.3) facing the impeller (2).
– Firmly press exchange motor (1) onto the seat of
the pump housing (6) and firmly secure by means
of the four Allen screws (5.8).
– Re-insert power cable through the cable gland
(5.8).
– Re-wire to terminals (not illustrated) and tighten
PG cable gland (5.8).
Size
PG
M5
M4
M6
M10
operating period. Short term dry-running will not harm
the pump. If, however, a direct venting of the rotor
space becomes necessary, proceed as follow:
– Switch off power supply to the pump.
Ensure that circlip sits fully inserted in
shaft groove
Torque Remarks
(Nm)
4 +1
0.4 + 0.1
1+ 0.1
0.4 – 0.1
8 +1 fasten evenly
30 +/– 0.5 fasten evenly
5