Proper Use; Water Quality Requirements - Kärcher HD 7/16-4 ST-H Bedienungsanleitung

If the operating time (without interruption of
work) exceeds an adjustable value (5...120
minutes), the appliance will shut off.
Motor protection switch
The motor protection switch switches off
the device if the power consumption is
high.
Leakage monitoring
In case of leaks in the high pressure sys-
tem, the appliance is shut off.
Pressure relief (option)
After the operation readiness period, a so-
lenoid valve opens in the high pressure
system and relieves the pressure.
Lack of water fuse (option)
The lack of water fuse in the float container
prevents the high pressure pump from run-
ning dry in case of a lack of water.

Proper use

– This equipment produces water under
high pressure downstream to high pres-
sure cleaning devices. If required the
detergent is drawn in and added to the
water.
– The high pressure module is perma-
nently installed in a dry, frost-free room.
The high pressure water is distributed
through a fixed network of pipes.
Alternatively, a hand spray gun with a
high pressure hose can be connected
directly to the high pressure outlet of the
appliance.
– The high pressure model must be in-
stalled at a wall in such a way that the
rear opening is sealed by the wall.
DANGER
Risk of injury! Follow the respective safety
regulations when operating at gas stations
or other dangerous areas.
Please do not let mineral oil contaminated
waste water reach soil, water or the sew-
age system. Perform engine cleaning and
bottom cleaning therefore only on speci-
fied places with an oil trap.
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EN

Water quality requirements

ATTENTION
Only clean water may be used as high
pressure medium. Impurities will lead to in-
creased wear and tear or formation of de-
posits in the appliance.
If recycled water is used, the following limit
values must not be exceeded.
pH value
electrical conductivity *
settleable solids **
total suspended solids *** < 50 mg/l
Hydrocarbons
Chloride
Sulphate
Calcium
Total hardness
Iron
Manganese
Copper
Active chloride
free of bad odours
* Maximum total 2000 μS/cm
** Test volume 1 l, settling time 30 min
*** no abrasive substances
6,5...9,5
Conductivity
fresh water
+1200 μS/cm
< 0,5 mg/l
< 20 mg/l
< 300 mg/l
< 240 mg/l
< 200 mg/l
< 28 °dH
< 50 °TH
< 500 ppm
(mg CaCO /l)
3
< 0,5 mg/l
< 0,05 mg/l
< 2 mg/l
< 0,3 mg/l
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