Installing The Plant - Kärcher HDC 20/8 Manual

Installing the plant

Only for authorised techni-
cians!
!
Wall mount
– 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.
Installing the high pressure
connections
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.
28
Water supply
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:
pH value 6,5...9,5
electrical conductivity < 2000 μS/cm
removable materials < 0,5 mg/l *
filterable materials (grain < 20 mg/l
size below 0.025 mm)
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
* 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.
12
-
EN
Electrical connection
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).