Karcher 600 CD manual Maintenance

MAINTENANCE		WTC 600 LP / MP
Preservation solution [l]	Sulfite 5kg1) [g]	RM 1,2 Propandiol 5l2) [l]
30	300	5,0

Table 25 Chemicals for conserving solutions

4.4.4.3Drain the pre-filter

If the WTC 600 is shutdown for a lengthy period, the pre-filters have to be drained. this prevents bacterial growth and the filter material from caking as well as frost damage.

Work steps:

1.Back-wash both pre-filters to remove any air from the containers.

The first back-washing step can be aborted after one minute by pressing the "manual regeneration" key, the 4th step can be skipped by pressing the "manual regeneration" key.

2.Interrupt the untreated water supply, depressurise the filter.

3.Undo hose 6.390-962.0 from the hose nozzle at the outlet of the activated carbon filter.

4.Attach a connection hose to this hose nozzle and screw tight with a hose clamp.

5.Fix the other end of the connection hose to the filter control heads.

6.Keep the untreated water supply open until water comes out of the connection hose.

7.Interrupt the untreated water supply and undo the screw fitting at the media filter inlet (of the AM version) or the activated carbon filter inlet (A version).

8.Quickly place the end of the connection hose in a discharge which is lower than the WTC 600 system: the filters are levered out (if necessary, repeat steps 5-8).

4.4.5Removing the Preservation After Longer Operational Interruptions

Carry out the following work steps to remove the preservation:

1.Remove the blind discs (see Section 3.3.1.2).

2.Provisionally connect the drinking water line to the waste water canal.

3.Completely fill the media and activated carbon filters with water (remove the control head first) and backwash each twice.

4.Flush the reverse osmosis (see Section 3.4.3.7).

5.Replace the fine filter, if required.

1)Sulfite 5 kg: Item No. 6.769-040.0

2)RM 1,2 Propandiol, 5l: Item No. 6.290-910.0

52 Service Handbook 08.2004