Karcher HD 3-7-22-4S Eg - Manual (Page 9)

English
9
Suctioning water from an open container
„ Screw suction hose with filter
(Order no. 4.440-238) to the water outlet.
„ Vent the unit before using.
„ To evacuate air from the unit, unscrew the
nozzle and leave the unit running until wa-
ter exits with no air bubbles.
„ Switch off the unit and screw the nozzle
back on.
Operating the unit
Danger!
Observe the relative safety regulations
when using the unit at filling stations or other
high-risk areas.
Caution!
Only clean engines in places which
have appropriate oil separators (protection of
the environment).
Caution!
Only wash animals with the low-
pressure fan jet (see "Selecting the type of
spray").
Operating with high pressure
The unit is equipped with a pressure switch.
The motor only starts up when the lever is re-
tracted.
„ Set the unit switch to "I". The indicator light
will go green.
„ Unlock the hand-held spray gun and retract
the lever of the gun.
„ Adjust operating pressure and flow rate
(+/–) by rotating the pressure/flow control
(infinitely variable).
„ At the lowest flow rate the waste heat from
the motor will heat the water to approx.
15 °C.
Selecting the type of spray
The handgun must be closed.
„ Rotate the housing of the nozzle until the
desired symbol corresponds with the mark-
ing.
„ Select pencil jet or fan jet by contactless
changeover:
rotate the spray lance, which is pointing
down at an angle of approx. 45°, to the left
or right.
Explanation of the symbols
High-pressure pencil jet (0°),
for particularly stubborn accumu-
lation of grime.
High-pressure fan jet (25°), for
dirt accumulation over a large
surface.
Low-pressure fan jet (CHEM)
for operation with detergent or for
cleaning at low pressure.
Operating with
detergent
Caution!
Unsuitable detergents can harm the
cleaner and the object which is to be cleaned.
Use only detergents which are released by
Kärcher. Proportions of detergent to be used
and accompanying instructions should be not-
ed carefully. Use detergents sparingly out of
consideration for the environment.
Kärcher cleaning agents guarantee trouble-
free operation. Please seek advice or ask for
our catalogue of information sheets on clean-
ing agents.
„ Fill detergent reservoir.
„ Set nozzle to
.
„ Set the detergent metering valve to the
desired concentration.
Concentration of detergent when flow at
maximun:
!
Position of metering
valve 1 3 5 7
0.5
%
2.5
%
5.0
%
7.0
%