Karcher WATERCLEAN 600 CD - Manual (Page 53)

53
WTC 600 LP / MP MAINTENANCE
Service Handbook 08.2004
4.4.6 Flushing the pre-filter
The WTC 600 LP/MP pre-filter must be flushed if the differential pressure of the pre-filter
immediately after back-washing is more than 0.5 bar.
Before flushing the filter, check the manometer for correct display values and
exchange if necessary!
Pre-filter blockages are caused above all by changed water constituents.
A renewed water analysis must be carried out in order to remove the cause of
blockages. Notify sales department! Additional treatment stages possibly required!
- Composition of the pre-filter flushing service kit
Auxiliaries:
- Flushing tank
- Four connection hoses
- Conductivity measuring device for comparative measurement after flushing
- (Goggles, gloves, apron)
- Flushing pump
Initial situation:
- RO system set to switched off operating mode and with master switch switched on.
Work steps:
1. Add 30 litres drinking water to the flushing tank and add 2.2 litres RM Kleen MCT 103
2. Dismantle the back-washing hoses at the pre-filters, connect the service kit hoses and feed
to the flushing tank
3. Connect the flushing pump to the pre-filter untreated water inlet
4. Start back-washing
5. Switch on flushing pump
6. Leave the flushing solution to circulate until the back-washing is finished (approx. 10 min)
7. Leave the flushing solution to stand for 30 minutes
8. Repeat the procedure from item 4 once again
9. Reinstate the original piping and carry out a complete backwash.
If this cleaning is unsuccessful, the media filter must be disinfected. The service kit contents and
the flushing sequence is the same as for flushing the pre-filter, however the chemicals used are
those given in table 26.
CAUTION
CAUTION