Operation - Kärcher HD 1090 Operation Manual

2.1 Deaerating the unit
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Open the water supply.
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Let the unit run without the high-pressure
hose until the water exits the high-pressure
outlet without bubbles.
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Then, connect the high-pressure hose.
2.2 Working with the high-pressure
nozzle
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The spray angle determines the effectiveness
of the high-pressure spray.
Turn the front safety device of the three-way
nozzle to set the spray angle.
High-pressure pencil jet (0°) for
especially stubborn dirt.
High-pressure fan jet (25°) for
large areas of dirt.
Low-pressure fan jet (CHEM) for
operation with detergent.
• • • • •
Always start by directing the high-pressure
spray onto the object which is to be cleaned
from a greater distance in order to prevent
damage caused by excessively high pressure.
• • • • •
Only turn the front safety device of the three-
way nozzle when the spray gun is closed.
2.3 Adjusting the working pressure and
flow rate
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You may infinitely adjust the working pressure
and the flow rate on the Servopress spray
gun. To do this, turn the small adjustment
wheel on the spray gun to the desired position.
• • • • •
At the lowest flow rate the waste heat from the
motor heats the water by approx. 68 °F (20°C).
8

2. Operation

2.4 Operation with detergent
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Fill the detergent tank.
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Set the three-way nozzle to "
• • • • •
Set the detergent metering valve to the desired
concentration.
Metering valve setting
Detergent concentration in %
at maximum flow rate
• • • • •
We recommend that you use detergent
sparingly for the sake of the environment.
Observe the recommended dosage on the
detergent label.
• • • • •
We offer you an individual cleaning and
detergent range, thereby guaranteeing fault-
free work. Please allow us to advise you or
order our catalogue or the detergent
information sheets.
Note:
Only those detergents which have been
approved by the appliance manufacturer may
be used. Unsuitable detergents can damage
the appliance and the object being cleaned.
• • • • •
We recommend the following cleaning
methods:
Step 1: Loosening dirt
Spray on detergent sparingly and leave for
1-5 minutes.
Step 2: Removing dirt
Spray off the loosened dirt with the high-
pressure spray.
• • • • •
After operating with cleaning agent, you should
set the cleaning agent metering valve to „0"
and flush the unit for approximately 1 minute
with the gun open.
".
1 3 5 7
0.5 2.5 5.0 7.0