Interrupting Operation - Kärcher HDS 7/9-4 M Manual

 With support of the detergent dose
valve set detergent concentration as
determined by the manufacturer.
Note: Recommended values at the control
panel at maximum working pressure.
 Set pressure/temperature and deter-
gent concentration according to the sur-
face to be cleaned.
Note: To prevent damage due to too much
pressure, always position high pressure ray
first from a greater distance towards object
to be cleaned.
Recommended cleaning method
– Loosen the dirt:
 Spray detergent economically and let it
work for 1...5 minutes but do not let it
dry up.
– Remove the dirt:
 Spray off loosened dirt with the high
pressure jet.
Operating with cold water
Removal of light contaminations and clear
rinse, i.e.: Gardening tools, terrace, tools, etc.
 Set operating pressure according to
need.
Eco operation
The appliance works in the most economi-
cal temperature range.
Note: The temperature can be regulated
up to 60 °C.
Operating with hot water/steam
We recommend the following cleaning tem-
peratures:
– Light contaminations
30-50 °C
– Contaminations containing protein, i.e.
in the food processing industry
max. 60 °C
– Vehicle cleaning, machine cleaning
60-90 °C
– De-preserve, contaminations contain-
ing strong fat contents
100-110 °C
32
Cleaning
– De-frosting of surcharge substances,
partially facade cleaning
up to 140 °C
Operating with hot water
DANGER
Scalding danger!
 Set temperature regulator to desired
temperature.
Operating with steam
DANGER
Scalding danger! The work pressure must
not exceed 3.2 MPa (32 bar) when operat-
ing with temperatures above 98 °C.
Therefore the following measures must
definitely be performed:
 Replace high pressure nozzle (stain-
less steel) with steam nozzle (brass,
order see specification).
 Open up the pressure/ quantity regula-
tor on the hand spray gun completely,
direction + until stop.
 Set the working pressure/quantity regu-
lation at the pump unit to the minimum
quantity.
 Set temperature regulator to min. 100 °C.

Interrupting operation

 Secure the trigger gun. To do so, push
the safety catch towards the front.
After operation with detergent
 Set dosing value for detergent to "0".
 Set the appliance switch to "1" (opera-
tion with cold water).
 Open the hand spray gun and rinse the
appliance for at least 1 minute.
Turn off the appliance
DANGER
Danger of scalding from hot water! After the
operation with hot water or steam, the de-
vice must be operated with opened gun
with cold water for at least two minutes.
 Shut off water supply.
 Open the hand spray gun.
 Switch on the pump with the power
switch and allow to run for about 5-10
seconds.
EN – 8