Kärcher WATERCLEAN 1600, Operating Instructions Manual

Page: 19 / 110

WATERCLEAN 1600
Version 03/2008
DESCRIPTION
- 13 -
Reverse Osmosis Module After leaving the preliminary filter unit, the raw water is fed to the re-
verse osmosis system.
When exceeding the required admission pressure of approx. 0.1 bar
in the untreated water line, the SPC switches on the two high-pressure
pump units P02 and P03 (3/12). The admission pressure is measured
through the sensor (3/13) and the pressure reading can be called up
via the SPC.
NOTE A minimum in-feed pressure of 0.1 bar is required for
the high-pressure pumps!
The high-pressure pump units (3/12) deliver the water at an increased
pressure (depending on the salt content, up to 69 bar) to the parallel
membrane filter blocks I (3/16) and II (3/17). A safety valve and a mem-
brane pressure reservoir are connected to the output side of each of
both the pumps.
Automatic Operation Mode
(Single Pass) During the automatic operating mode, the polluted part of the water
(concentrate) of both the membrane filter blocks I and II is fed as raw wa-
ter to the inlet of membrane filter block III (3/23). The filtrate produced
from both these cleaning stages flows to the drinking water outlet.
The concentrate from the second stage is conducted via the motor-
driven pressure maintaining valve V06 (3/24) to the concentrate outlet.
The working pressure and drinking water quantity are regulated by
the pressure maintaining valve.
In order to minimize the raw water requirement of the entire system,
a part of the concentrate of the second stage can be mixed with the
raw water at the inlet of the high-pressure pump. The return flow
quantity is limited by the constant flow regulator V24 (3/14) to 1 m
3
/h.
If the conductivity of the drinking water exceeds 2 000 µS/cm, or if the
drinking water quantity falls below 1 600 l/h, the return flow must be
shut off at valve V05 (3/15).
Fig. 4a Flow diagram, membrane filter in Single Pass operation
mode
Manual Operation Mode,
Double Pass (Option) For the manual operation mode the plant must be put into operation
manually. A requirement for this operation mode is a salt content of
the raw water of < 5 000 ppm (conductivity approx. 10 000 µS/cm).
RO-Filter I
RO-Filter III
RO-Filter II
V03
V04
V02
V05 V24
10 bar
F04
F05
F06
M V06
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15
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20
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23
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