Water Supply - Kärcher K 3.99 M Operating Instructions Manual

Note: Make sure the connection nipple
is aligned correctly.
Check the secure connection by pulling
on the high-pressure hose.

Water supply

According to the applicable regula-
tions, the appliance must never be
used on the drinking water supply
without a system separator. Use a
suitable system separator manufactured by
KÄRCHER; or, as an alternative, a system
separator as per EN 12729 Type BA. Water
flowing through a system separator is con-
sidered non-drinkable.
Note: Impurities in the water can damage
the high-pressure pump and accessories.
For protection, the use of the KÄRCHER
water filter (optional accessory, order no.
4.730-059) is recommended.
Water supply from mains
Observe regulations of water supplier.
For connection values, see type plate/tech-
nical data.
Use a fibre-reinforced water hose (not
included) with a standard coupling.
(Minimum diameter 1/2 inch (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 wa-
ter supply.
Drawing in water from open reservoirs
This high-pressure cleaner is suited to work
with the KÄRCHER suction hose with back-
flow valve (Optional accessory, order no.
4.440-238) to draw in surface water, e.g.
from water butts or ponds (see specifica-
tions for max. suction height).
Fill the KÄRCHER suction hose with
backflow valve with water, screw to wa-
ter supply and hang into he water butt.
Separate the high pressure hose from
the high pressure connection of the ap-
pliance.
6
English
Switch the appliance on "I/ON" and op-
erate until the water exits the high-pres-
sure connection without bubbles.
Turn off the appliance "0/OFF".
Start up
Caution
Never operate the high-pressure cleaner
when the tap is turned off as dry running will
damage the high-pressure pump.
Connect the high pressure hose to the
high pressure connection of the appli-
ance.
Push the spray lance into the trigger
gun and fasten it by turning it through
90°.
Completely open the water tap.
Insert the mains plug into the socket.
Turn on the appliance "I/ON".
Operation
Danger
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 holding the trigger gun and spray lance
firmly.
Unlock the lever on the trigger gun.
Pull on the lever of the trigger gun; the
device will switch on.
Note: Release the lever of the trigger gun;
the device will switch off again. High pres-
sure remains in the system.
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 Dirtblaster
For particularly dirty items or areas.
Not suitable for use with detergents.
Washing brush
Suitable for use with detergents.