Wilo NL-HE Series, Инструкция по установке и эксплуатации

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Maintenance/repair en
Installation and operating instructions Wilo NL-HE 33
7.2 7.2 2.2 2.1 3.2 7.2 7.1 7.1
Fig. 19: Dismantling the slide-in unit
1. Mark positions of the parts that belong together with a coloured pen or scriber.
2. Remove the hexagon head screws (14).
3. Carefully pull the slide-in unit straight out of the spiral housing (1.1) to avoid damage
to interior parts.
4. Put the slide-in unit down at a safe workplace. To continue dismantling the slide-in
unit, fix it vertically in position with the drive shaft facing downward. The kit must be
removed vertically to avoid damage to the impellers and other parts.
5. Remove the housing seal (1.2).
6. Remove the hexagon head screws (7.2) and remove the protective grid (7.1).
7. Loosen the impeller nut (2.2) and remove along with the lock washer and impeller disc.
Version with mechanical seal (optional: mechanical seal on the sleeve)
15 10 9.1 9.2
Fig. 20: Version with mechanical seal
10 9.1
Fig. 21: Housing cover, mechanical seal
1. Remove the spacer (9.2).
2. Remove the rotating part of the mechanical seal (9.1).
3. Loosen the interior hexagonal head screws (15) and remove the housing cover (10).
4. Remove the stationary part of the mechanical seal (9.1).