Kärcher ABS WSO SB-Wash Manual page 20

Functional description
If softened water is consumed, then fresh
water flows through the base exchanger
cylinder and is softened. If the residual
hardness of the softened water exceeds a
marginal value, the hard water sensor trig-
gers a regeneration of the base exchanger
cylinder. The base exchanger cylinder is
regenerated using the brine from the salt
tank.
If the buffer tank of permeate is partially
empty, then softened water flows from the
base exchanger via
finest filter,
–
inlet valve,
–
Pump,
–
RO membrane,
–
to the buffer tank for permeate.
–
The RO membrane separates the softened
water in the permeate and concentrate.
The permeate flows to the buffer container
for permeate. A part of the concentrate is
fed back for achieving better yield to the
suction side of the pump.
If the Top care programme is active, the SS
wash is supplied with water from the buffer
tank for permeate.
Monitoring and safety devices
Hard water sensor
If the residual hardness of the softened wa-
ter exceeds a marginal value, the hard wa-
ter sensor triggers a regeneration of the
base exchanger cylinder.
Pressure switch - Water scarcity
If there is no water, the plant is stopped in
order to prevent dry running of the pump.
Level switch Buffer tank is full
Switches off the pump when the buffer tank
for permeate is full. Starts the pump when
the filling level in the buffer tank for perme-
ate starts to sink.
Level switch Buffer tank is empty
Issues a signal to SS wash when the buffer
tank for permeate is empty.
20
Accessories
Test set A
Order no. 6.768-004.0
for determining the fresh water hardness.
Test set B
Order no. 6.768-003.0
For determining the residual hardness of
the softened water.
Test set C
Order no. 6.803-028
For determining the chlorine content based
on the active carbon filter.
Fuel
Lock grease
Order no. : 6.288-116.0
Steel care product
Order no. : 6.290-911.0
Water softening salt in form of tabletts
order number: 6.287-016
25 kg, for option base exchanger
6
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EN