8 Servicing/Maintenance
51 of 104
mini-Compacta
2317.886/16-EN
8.2.4.1 Oil quality
Recommended oil quality:
▪
Paraffin oil, thin-bodied, made by Merck, No. 7174, or equivalent
▪
Medical quality
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Non-toxic
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Recognised as safe and therefore food-approved
8.2.5 Emergency operation with one pump
mini-Compacta UZ150, UZS150
NOTE
If emergency operation must be ensured during maintenance, inspection or repair
work, proceed as follows:
1. Close the inlet-side and discharge-side gate valves.
2. Interrupt the power supply. (
3. Remove the rotating assembly. (
4. Close the opening for the rotating assembly with a blind flange (available as
accessory).
5. Set the switch for the dismantled pump to "0".
6. Set the switch of the remaining pump to "Automatic".
This pump will now be started and stopped automatically via the level sensor.
7. Open the inlet-side and discharge-side gate valves.
CAUTION
Excessive inflow
Flooding of installation room!
▷
During emergency operation the inflow should be kept to a minimum.
8.3 Dismantling the hydraulic system
8.3.1 Removing the rotating assembly
mini-Compacta U60, U100, UZ150
1. Remove hexagon socket head cap screws 914.04.
2. Lift rotating assembly 01-44 out of tank 591.
3. Take O-rings 412.11 and 412.12 off casing cover 161.
4. Undo hexagon nut 920.02 and remove disc 550.02.
5. Pull impeller 230 off shaft 210.
NOTE
The impeller/shaft connection is a snug fit. If the impeller is hard to remove, it can
be loosened by means of a suitable tool (e.g. mandrel) inserted through the vent
hole B5 in casing cover 161 until a gap is produced between the impeller and the
casing cover. Use two screwdrivers/suitable lever tools to lift off the impeller (see
Fig.).
