Karcher HD 13/12-4 ST-H [20/357] Function
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Karcher HD 13/12-4 ST-H [20/357] Function

Karcher HD 13/12-4 ST-H [20/357] Function
20 English
Note
Only clean water may be used as high pres-
sure medium. Impurities will lead to in-
creased wear and tear or formation of
deposits.
* Test volume 1litre, Settling time 30 min-
utes
** decalcification measures are necessary if
the values are higher
With the decrease in total water flow the
water runs through the water inlet, the
swimmer tank, advance pressure pump hot
water and through the high-pressure pump
to the high-pressure outlet.
If only a part of the water capacity fed from
the pump is needed, the rest of the flow
runs through the flow regulator back to the
suction site of the high-pressure pump.
Detergent is drawn in by the high-pressure
pump and dispened manually through the
detergent dispenser.
If the system pressure falls during the
standy by period the opening of one of the
power consuming devices, then the high-
pressure switch will start the pump.
If the water rises in the flow regulator as a
result of low or no water removal, the pres-
sure on the low pressure switch will also
rise. If the pressure passes a limit, then the
shut-down process will begin.
– After a few seconds the pump will stop
and the stand-by period will begin.
– If water removal takes place during the
stand-by period, then the pump will start
once again.
– At the end of the stanby-by period the
installation is started up by switching the
emergency-stop switch off and on or by
pressing the remote control button (op-
tional).
Water quality requirements.
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 < 15 °dH **
Iron < 0.5 mg/l
Manganese < 0.05 mg/l
Copper < 0.02 mg/l
free of bad odours
Function
Flow pattern
1 High-pressure pump
2 High pressure switch
3 Low pressure switch
4 flow regulator
5 Swimmer tank
6 Water inlet
7 Detergent dispensing, manual
7a Assembly 2. detergent (optional,
only by remote control).
8 Advance pressure pump
9 High-pressure outlet
10 Manometer
11 Installation water softener (option-
al)
Full pump capacity
Parts removal
Detergent
Automatic pump start
Automatic shutdown

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