Proper Use; Safety Devices; Overflow Valve; Pressure Switch - Kärcher HD 10/21-4 S Manual Original

Symbols on the machine
High-pressure jets can be dan-
gerous if improperly used. The
jet may not be directed at persons, animals,
live electrical equipment or at the appliance
itself.
According to applicable regula-
tions, the appliance must never be
used on the drinking water net
without a system separator. A suit-
able system separator by KÄRCHER or al-
ternatively a system separator according to
EN 12729 type BA must be used.
Water that was flowing through a system
separator is considered non-drinkable.
CAUTION
Always connect the system separator to
the water supply, never directly to the appli-
ance!

Proper use

Use this high pressure cleaner exclusively for
– Cleaning using low pressure jet and de-
tergent (for e.g. for cleaning machines,
cars, buildings, tools),
– For cleaning using high pressure jet
without detergent (for e.g. for cleaning
facades, terraces, garden appliances).
For stubborn dirt, we recommend the use of
the dirt blaster as a special accessory.
Quality requirements for water:
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
16
6,5...9,5
Conductivity
fresh water
+1200 µS/cm
< 0,5 mg/l
< 20 mg/l
< 300 mg/l
EN – 2
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

Safety Devices

Safety devices serve for the protection of the
user and must not be put out of operation or
bypassed with respect to their function.

Overflow valve

The overflow valve prevents the permissi-
ble working pressure from being exceeded.

Pressure switch

– If the pulling lever on the trigger gun is
released the pressure switch turns off
the pump, the high-pressure jet is
stopped. If the pulling lever is pulled the
pump is turned on again.
– The overflow valve and pressure switch
are set and sealed at the factory. Set-
ting only by customer service.
Motor protection switch
The motor protection switch switches off
the device if the power consumption is high.
< 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