Manual Karcher HDC 20-16 H (page 28 of 384) (All languages)

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– Before installing, please check the

load-bearing capacity of the wall. Use

suitable anchor plugs and screws for

concrete walls, hollow component

walls, brick walls and gas concrete

walls - for e.g. injection anchors (see

packaging for drilling template).

– The appliance should not be directly at-

tached to the network of water and high

pressure pipes. It is mandatory to install

the connecting hoses.

– A shut-off tap must be installed be-

tween the main water supply and the

connecting hose.

All national laws and regulations about in-

stallation of electrical appliances must also

be followed when installing high pressure

lines.

– The pressure loss in the pipe connec-

tions must lie below 1.5 MPa.

– The completed pipeline must be tested

with 16 MPa (HDC 20/8) bzw. 32 MPa

(HDC 20/16).

– The insulation of the pipes must be re-

sistant to temperatures until 100 °C.

ATTENTION

Risk of damage to the plant if water supply

is not of suitable quality.

Note: Impurities in the inlet water can dam-

age the unit. Kärcher recommends a water

filter with a mesh width of < 80 μm.

Quality requirements for tap water:

* Test volume 1litre, Settling time 30 min-

utes

** decalcification measures are necessary

if the values are higher

The water inlet is to be connected to the

main water supply using a water hose.

– The water supply must have a minimum

output of 2,000 l/h at minimum 0.15

MPa.

– Appliances without prepressure pump:

The water temperature must lie below

60 °C.

– Machines with prepressure pump: The

water temperature must lie below 85

°C.

Note: Operating procedures create short

term power sinkings. During unfavorable

net conditions other devices might be dis-

turbed.

ATTENTION

The highest allowed net impedance at the

electrical connection point (refer to techni-

cal data) is not to be exceeded. In case of

confusion regarding the power impedance

present on your connection, please contact

your utilities provider.

– For connection values, see technical

data and type plate.

– The electrical connections must be

done by an electrician according to IEC

60364-1.

– Current-carrying parts, cables and ap-

pliances in the working area must be in-

stalled in a defectless state and must be

protected against water sprays.

DANGER

To avoid accidents due to electrical faults

we recommend the use of sockets with a

line-side current-limiting circuit breaker

(max. 30 mA nominal tripping current).

Installing the plant

Only for authorised techni-

cians!

Wall mount

Installing the high pressure

connections

Water supply

pH value 6,5...9,5

electrical conductivity < 2000 μS/cm

removable materials < 0,5 mg/l *

filterable materials (grain

size below 0.025 mm)

< 20 mg/l

Hydrocarbons < 20 mg/l

Chloride < 300 mg/l

Calcium < 85 mg/l **

Total hardness < 9 °dH **

Iron < 0,5 mg/l

Manganese < 0,05 mg/l

Copper < 0,02 mg/l

free of bad odours

Electrical connection

28 EN

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Karcher HDC 20-16 H Manual

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