Wilo Stratos GIGA Série Notice De Montage Et De Mise En Service page 118

English
1
Fig. 49: Ventilation valve
Fig. 50: Optional fixation of the motor
impeller unit
112
1. Disconnect the system from the power and secure it against being
switched on.
2. Close the shut-off device upstream and downstream of the
pump.
3. Ensure system is voltage-free
4. Earth the work area and short-circuit.
5. Disconnect the power cable. If present, remove the cable for the
differential pressure sensor.
6. Depressurise the pump by opening the air vent valve
(Fig. 49 Item 1)
DANGER! Risk of scalding!
Due to high fluid temperatures there is a danger of scalding.
• If the pump fluid is hot, allow it to cool down before performing any
work.
7. Loosen the screws (Fig. 7, Item 1) and pull off the fan cover (Fig. 7,
Item 2) axially from the motor.
8. Plastic spacers are loosely inserted into both drilled holes in order
to attach the transport eyes to the motor housing (Fig. 7,
Item 20b). These spacers are to be screwed out of the drilled
holes. Be sure to keep the spacers or screw them into the empty
drilled holes on the motor flange (Fig. 7, Item 20a) after moving
the transport eyes (see step 9).
9. Remove the two transport eyes (Fig. 7, Item 20) from the motor
flange (Fig. 7, Item 20a) and attach them with the same screws to
the motor housing (Fig. 7, Item 20b).
10. Attach the motor impeller unit to the transport eyes with suitable
lifting equipment for the purpose of safeguarding.
NOTE:
When attaching the lifting equipment, avoid damaging the plastic
parts, such as the fan wheel and module upper part.
11. Loosen and remove the screws (Fig. 7, Item 3). Depending on the
pump type, the outer screws (Fig. 50, Item 3) are to be taken. The
motor impeller unit (see Fig. 13) remains securely in the pump
housing after the removal of the screws; there is no a danger of
tipping even in the horizontal position of the motor shaft.
NOTE:
8
An offset screwdriver or socket wrench with ball coupling is best
suited for unscrewing of the screws (Fig. 7, Item 3), especially for the
pump types with limited space available. It is recommended to use
two mounting bolts (see chapter 5.4 "Accessories" on page 72)
instead of two screws (Fig. 7, Item 3) which are screwed in diagonally
to each other in the pump housing ( Fig. 7, Item 14). The mounting
3
bolts make it easier to avoid damaging the impeller when dismantling
the motor impeller unit and then reinstalling it.
12. When the screws (Fig. 7, Item 3) are removed, the differential
pressure sensor will also be released from the motor flange. Allow
the differential pressure sensor (Fig. 7, Item 5) with the holder
(Fig. 7, Item 6) to be suspended at the pressure measurement
lines (Fig. 7, Item 13).
Disconnect the connection cable of the differential pressure sen-
sor in the electronic module.
WILO SE 10/2017