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

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 temperature at the installation site
should not exceed 40 °C. 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 contaminat-
ed waste water reach soil, water or the
sewage system. Perform engine cleaning
and bottom cleaning therefore only on
specified places with an oil trap.

Water quality requirements

Note
Only clean water may be used as high
pressure medium. Impurities will lead to in-
creased wear and tear or formation of de-
posits.
pH value
electrical conductivity
removable materials
filterable materials
(grain size below 0.025
mm)
Hydrocarbons
Chloride
Calcium
Total hardness
Iron
Manganese
Copper
free of bad odours
* Test volume 1litre, Settling time 30 min-
utes
** decalcification measures are necessary
if the values are higher
2
-
EN
6,5...9,5
< 2000 μS/cm
< 0.5 mg/l *
< 20 mg/l
< 20 mg/l
< 300 mg/l
< 85 mg/l **
< 15 °dH **
< 0.5 mg/l
< 0.05 mg/l
< 0.02 mg/l
19