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WARNING
Personal injury!
Incorrect dismantling of the motor can result in personal injury.
• Before dismantling the motor, ensure that the centre of gravity is not
above the holding point.
• Secure the motor against tipping over during transport.
• Always use suitable lifting accessories and secure parts against falling.
• Never stand below a suspended load.
1.
Disconnect the system from the power supply and secure it against being switched on
again without authorisation.
2.
Make sure it is not live.
3.
Earth the work area and short-circuit.
4.
Close the shut-off devices upstream and downstream of the pump.
5.
Depressurise the pump by opening the air vent valve (Fig. XXIX/XXX/XXXII, Item 1.31).
6.
Disconnect the motor connection cables.
7.
Remove the coupling guard metal sheets (Fig. I, Item 1) with a suitable tool (e.g. screw-
driver).
8.
Press the mechanical seal out of its seat and dismantle the coupling (see "Dismantling"
in "Replacing the mechanical seal" section and Fig. I to VIII).
9.
Loosen the motor fastening screws (Fig. XXV, Item 1) on the motor flange and lift the
drive off the pump with suitable hoisting gear (Fig. XXVII).
10. Install the new motor using suitable hoisting gear and screw the connection between
lantern and motor tight (Fig. XXVIII).
NOTICE
For all subsequent work, observe the torque specified for the respective
thread type (see tightening torques table)!
11. Check the coupling and shaft sliding surfaces and, if necessary, clean them.
12. Install the coupling and fasten the mechanical seal (see "Installation" in "Replacing the
mechanical seal" section and Fig. XII to XXI).
13. Install the coupling guard metal sheets (Fig. XXIII).
14. Connect the motor cable.
Always tighten screws diagonally.
Screw connection
Post
Size/tensile strength class
1)
Impeller – Shaft
M20
1)
Impeller – Shaft
M18
1)
Impeller – Shaft
M24
Pump housing –
M16
Lantern
Pump housing –
M20
Lantern
Lantern – Motor
M16
Lantern – Motor
M20
2)
Coupling
M10
2)
Coupling
M12
2)
Coupling
M14
2)
Coupling
M16
Installation and operating instructions • Wilo-Atmos GIGA-I/-D/-B • Ed.01/2023-08
Tightening torque
Nm ± 10 %
A2-70
100
145
350
8.8
100
170
100
170
10.9
60
100
170
230
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