Wilo Atmos GIGA-B, Инструкция по установке и эксплуатации

Страница: 61 / 68

Maintenance en
Installation and operating instructions Wilo-Atmos GIGA-I/-B 61
NOTICE
For all following work, observe the screw tightening torque specified for the re-
spective thread type (table on screw tightening torques)!
12. Tighten the central screw of the impeller shaft with the prescribed torque. Use a
strap wrench to apply counter pressure.
13. Tighten the mounting screw (Fig. XVII).
14. Tighten the central screw of the motor shaft with the prescribed torque (Fig. XVIII,
item 1). Use a strap wrench to apply counter pressure.
15. Insert the second key (Fig. XIX, item 2) of the impeller shaft.
16. Put on the second coupling half (Fig. XIX, item 1).
17. Evenly screw the available coupling screws, as a final step, the coupling screw from
the installation drilled hole (Fig. XX).
18. Unscrew both mechanical seal press-out forcing screws from the cover (Fig. XXI).
19. Carefully vertically press the mechanical seal into its seat. Avoid damage to the
mechanical seal due to jamming (Fig. XXI).
20. Screw in all four cover screws (Fig. XXII, item 1) and tighten them with the pre-
scribed torque.
21. Rescrew and tighten the four interior hexagonal head screws (locking pins,
Fig. XXII, item 2) completely in succession.
22. Install the coupling guard metal sheets (Fig. XXIII).
23. Connect the motor cable.
10.2.2 Changing the motor
Increased bearing noises and unusual vibrations indicate bearing wear. The bearings or
motor must then be replaced. The drive may only be replaced by the Wilo customer ser-
vice!
Dismantling:
WARNING
Risk of scalding!
At high fluid temperatures and system pressures, allow the pump to cool down first
and then depressurise the system.
WARNING
Personal injury!
Incorrect dismantling of the motor can result in personal injury.
• Before dismantling the motor, be sure that the centre of gravity is not above the
holding point.
• Secure the motor against tipping over during transport.
• Always use suitable lifting equipment and secure parts against falling.
• Never stand underneath 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. XIX/XXX, 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.
screwdriver).
8. Press the mechanical seal out of its seat and dismantle the coupling (see “Dismant-
ling” in chapter “Replacing the mechanical seal” and Fig. I ... VIII).