Device Elements; Operation - Kärcher WRH 1200 Originalbetriebsanleitung

1 Tension lever
2 Unlocking lever
3 Filament filter
4 Multi-channel valve
5 Manometer at the filter inlet
6 Overflow valve
7 Throttle valve **)
8 Manometer active carbon filter
9 Active carbon filter
10 Hose coupling at output of active car-
bon filter
11 Hose coupling at input of active carbon
filter
12 Safety valve
13 Aperture
14 Filtrate hose
15 Switch solenoid
16 2. Active carbon filter **)
17 Test tap **)
18 Solenoid valve
A To the sludge collector
B to collect sludge (rinse back)
C from the immersion pump
D To the sludge collector (excessive pres-
sure)
E to the high-pressure cleaner / proc-
essed water tank (filling)
F To the drainage system
**) Option

Operation

Adjust the filter pre-tension
Proceed as follows to subsequently change
the filter tension:
 Turn the tension lever to the left until the
lever reaches the stop. Then attach it
with the unlocking lever.

Device elements

Filter operations
 Turn the lever of the multi-channel
valve in "FILTRATION" position.
Note
After longer idling times it takes a lot of ef-
fort to activate the multi-channel valve.
 Check filter pre-tension.
 Start the pump in the building.
Backwash
Note
During normal operations, you must back-
wash the filter at least once daily. The sys-
tem does not release any processed water
during the back-rinsing process..
During backwash, the dirt collected in the
filament filter is removed. To do this, the fil-
ament filter is rinsed in the reverse direc-
tion. The rinsed dirt is routed to the sludge
collector of the recycling system.
 Start the pump in the building.
Warning
The max. permissible flow volume during
return rinse is 2,000 l/h. Adjust flow volume
on throttle valve if necessary (order no.)
4.640-230.0).
 Turn the lever of the multi-channel
valve in "RÜCKSPÜLEN/BACKWASH"
position.
2
-
EN
 Loosen the filament filter by turning the
tension lever in the anti-clockwise direc-
tion.
 Wait for 30 seconds.
 Tighten the filament filter and loosen it
immediately.
 Repeat ten times this process of waiting
for 10 minutes - tightening - loosening.
 Reset the filter pre-tension.
 Turn the lever of the multi-channel
valve in "ERSTFILTRAT/RINSE" posi-
tion.
 Wait 2 minutes
 Turn the lever of the multi-channel
valve in "FILTRATION" position.
Processed water circulation
If the high-pressure cleaner or the washing
system does not use up the water, the proc-
essed water is circulated to avoid foul
odour.
Note
The immersion pump can be periodically
switched on/off during non-operating hours
(for e.g. at night, over the week-end) to low-
er the operating hours. For this you can
connect the immersion pump via a timer to
the power supply.
Maximum interval increment: 1 hour.
Frost protection
The plant must be operated in frost-free
rooms. During frost, put the system out of
operation and remove all traces of water:
 Pull out the hoses.
 Let the system dry-run.
Shutdown
 Switch off the building pump.
 If there is risk of frosting, then any exist-
ing water traces must be removed (see
section "Anti-freezing").
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