High Pressure Operation; Operation With Detergent - Kärcher K 6.91 MD Operating Instructions Manual

Caution
Never operate the high-pressure cleaner
when the tap is turned off as dry running will
damage the High pressure pump.
If the water supply is not clean, the Kärcher
water filter must be used (special accesso-
ry - order No. 4.730-059).
Water supply from open reservoirs
When fitted with the appropriate accesso-
ries, this high-pressure cleaner can draw in
surface water, e.g. from water butts or
ponds (max. suction height 0.5 m).
Use the Kärcher water filter to protect
the high pressure pump and accesso-
ries (special accessories). This filter re-
moves dirt from incoming water.
As the standard coupling system is not
suitable for use in suction mode, the
Kärcher suction hose with integrated fil-
ter should be used instead (special ac-
cessory) and suspended inside the
water butt.
Remove air from appliance before oper-
ation: Switch on the appliance when the
high pressure hose is not connected
and run it until the water which dis-
charges from the high pressure outlet is
free of bubbles. Switch off appliance
and connect high pressure hose.
Note: Fill suction hose with water be-
fore use, this will help ventilate the
pump of air.
Start up
Screw high pressure hose on to high
pressure outlet on appliance.
Push the appropriate spray lance on to
the trigger gun and fasten it by turning it
through 90°.
Open tap.
Plug in the main plug.
Set main switch to "I/ON".
Press safety catch on the trigger gun to
release it and pull lever.
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English

High pressure operation

Risk of injury
The trigger gun is subjected to a recoil force
when the water jet is discharged. Make sure
that you have a firm footing and are also hold-
ing the trigger gun and spray lance firmly.
Spray lance with pressure regulation
Carrying out the most common cleaning
tasks. The work pressure can be stageless-
ly regulated between "Min" and "Max".
Release the lever on the trigger gun.
Turn the spray lance to the desired po-
sition.
Spray lance with dirt blaster
For strong contaminations.

Operation with detergent

Note
Detergent can only be added when the appli-
ance is being operated in low pressure mode.
All washing brushes supplied by Kärcher
are designed for use with detergents.
Use spray lance with pressure regula-
tion (Vario Power).
Turn the spray lance to "Mix" position -
low pressure.
Detergent infeed from detergent tank
Fill the detergent reservoir with, deter-
gent tablet and water or detergent con-
centrate and water (observe metering
recommendations on the packaging la-
bel of the detergent).
Detergent metering regulator
Turning the regulator to the left: Deter-
gent is added from the left detergent
tank.
Turning regulator to the right: Detergent
is added from the right detergent tank.
Recommended Cleaning Method
1 Spray a small dose of the detergent on
the dry surface, and allow it to react
(make sure the detergent does not dry
up).
2 Wash off the loosened dirt using the
high-pressure jet.