High Pressure Operation; Low Pressure Operation With Detergent - Kärcher K 3.99 M Operating Instructions Manual

4.1 High Pressure Operation

• Ensure the Spray Lance with Vario Power Nozzle (No. 6) is attached
securely to the Spray Gun (No. 8).
• Set vario power nozzle to high pressure mode "+".
• Aim the lance towards the object to be cleaned
making sure the recommended working distance
is used for reference (See Page 10). Release the
safety ratchet on the Spray Gun and squeeze the trigger.
• Switch on the pressure washer (No. 2).
The pressurised water jet alone is capable of fulfilling most
cleaning tasks around the garden or on building work but
detergent and wash brush are advantageous when cleaning
vehicles or other paint finishes.

4.2 Low Pressure Operation with Detergent

• Dilute the detergent in a suitable container to the required concentra-
tion before using. (The correct dilution is dependent on the degree of
soiling of surface and is best determined by experience).
• Hang the Detergent Suction Tube (No. 1) in the Detergent Container.
• Set Vario Power Nozzle to low pressure mode "–".
Note: No detergent in high pressure mode.
• Aim the Spray Gun towards the object to be clea-
ned, release the Safety Ratchet on the Spray Gun
and squeeze the trigger to apply the detergent to
the working area.
• Switch on the pressure washer (No. 2)
We recommend the following cleaning method:
Step 1:
Remove loose dirt by washing over the surface to be cleaned with the
high pressure jet.
Step 2:
Spray on the detergent and leave for 1-4 minutes, so assisting the easy
removal of fine dirt and associated greasy adhesions.
Step 3:
Finally, spray off the loosened dirt with the high pressure spray.
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