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WTC 600 LP / MP MAINTENANCE
Service Handbook 08.2004
4.4.3 Acidic and Alkaline Cleaning
If the original drinking water capacity and quality can not be reached, an acidic cleaning or an
alkaline cleaning of the equipment is to be carried out.
Aids:
- Universal indicator paper1) pH 0-14
- Chemicals for cleaning and for neutralization.
Work Steps:
1. The equipment is prepared for cleaning (compare with Chapter 4.4.1).
2. Switch the RO system to the disinfection operating mode and allow the cleaning solution to
circulate for approx. 30 minutes.
Maximum temperature of the cleaning solution during cleaning: 35 °C.
Minimum temperature of the cleaning solution during cleaning 15 °C.
End the cleaning when a change of the pH-value can no longer be detected.
If the cleaning solution is strongly soiled, it should be neutralized and rejected.
Continue the cleaning with new solution.
3. After finishing the cleaning, switch the RO equipment to the switched off operating mode,
4. Connect the untreated water supply to the RO equipment again; guide drinking water and
concentrate outlet to the canal.
5. Plug in the earthing-contact plugs of the metering pumps
6. Switch the RO equipment to the operating mode
7. Leave the RO system to run for 30 minutes.
8. Reinstate the original piping layout
9. Regulate the RO equipment according to the type plate and draw up record
10. Dispose of the cleaning solution in accordance with the regulations.
1)
Item No. 6.768-355.0
CAUTION
CAUTION
CAUTION