Commissioning And Operation; Before Startup; High Pressure Operation; Operation With Detergent - Kärcher K 5.91 MD Operating Instructions Manual

Commissioning and operation

Before Startup

Assemble appliance as shown on
page 10.
Push out the safety clip in the handgun
using e.g. a small screwdriver.
Join high pressure hose and handgun
together.
Push clip in until it engages and check
that it is securely fastened by pulling on
the high pressure hose.

Water supply

Water supply from mains
For connection values, see type plate/tech-
nical data.
Observe regulations of water supplier.
Use a fibre-reinforced hose (not includ-
ed) with a standard coupling:
- Minimum diameter, 1/2 inches (13 mm)
- Minimum length, 7.5 m.
Screw the coupling unit (supplied) to the
water connection on the appliance.
Push the water supply hose onto the
coupling unit, then connect it to the tap.
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 accessory
- 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-
6
English
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 discharg-
es from the high pressure outlet is free
of bubbles. Switch off appliance and
connect high pressure hose.
Note: The appliance deaerates faster if
you first fill the suction hose with water.
Start up
Screw high pressure hose on to high
pressure outlet on appliance.
Push the appropriate spray lance on to
the handgun 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 handgun to
release it and pull lever.

High pressure operation

Risk of injury
The handgun is subjected to a recoil force
when the water jet is discharged. Make sure
that you have a firm footing and are also
holding the handgun and spray lance firmly.
Spray lance with Vario Power nozzle
Carrying out the most common cleaning
tasks.
Turn the Vario Power nozzle to required
high pressure position (Min–Max).
Spray lance with dirt blaster
For strong contaminations.

Operation with detergent

Note
Detergent can only be added when the ap-
pliance is being operated in low pressure
mode.
All washing brushes supplied by Kärcher
are designed for use with detergents.