Manual Karcher HDS 9-17-4 C Classic (page 22 of 360) (All languages)

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Quality requirements for water:

ATTENTION

Only clean water may be used as high

pressure medium. Impurities will lead to in-

creased wear and tear or formation of de-

posits in the appliance and accessories.

If recycled water is used, the following limit

values must not be exceeded.

– Please follow the national rules and

regulations for fluid spray jets of the re-

spective country.

– Please follow the national rules and

regulations for accident prevention of

the respective country. Fluid spray jets

must be tested regularly and the results

of these tests must be documented in

writing.

– The heating appliance of the machine is

an ignition plant. All national laws and

regulations about heating systems must

also be followed.

– The appliance/accessories must not be

modified.

Safety devices serve for the protection of

the user and must not be put out of opera-

tion or bypassed with respect to their func-

tion.

– When the water supply at the pump

head is reduced, the overflow valve

opens and part of the water flows back

to the suction side of the pump.

– If the hand-spray gun is closed, so that

the whole water flows back to the pump

suck side, the pressure switch at the

overflow valve shuts down the pump.

– If the hand spray gun is opened, the

pressure switch on the cylinder head

turns the pump back on.

The overflow valve is set by the manufac-

turer and sealed. Setting only by customer

service.

– The safety valve opens, when the over-

flow valve resp. the pressure switch is

broken.

The safety valve is set by the manufacturer

and sealed. Setting only by customer ser-

vice.

– The water shortage safeguard prevents

the burner to be turned on when there is

water shortage.

– A sieve prevents the contamination of

the safeguard and must be cleaned reg-

ular.

Please do not let mineral oil contaminated

waste water reach soil, water or the sew-

age system. Perform engine cleaning and

bottom cleaning therefore only on speci-

fied places with an oil trap.

pH value 6,5...9,5

electrical conductivity * Conductivity

fresh water

+1200 µS/cm

settleable solids ** < 0,5 mg/l

total suspended solids *** < 50 mg/l

Hydrocarbons < 20 mg/l

Chloride < 300 mg/l

Sulphate < 240 mg/l

Calcium < 200 mg/l

Total hardness < 28 °dH

< 50 °TH

< 500 ppm (mg

CaCO

/l)

Iron < 0,5 mg/l

Manganese < 0,05 mg/l

Copper < 2 mg/l

Active chloride < 0,3 mg/l

free of bad odours

* Maximum total 2000 µS/cm

** Test volume 1 l, settling time 30 min

*** no abrasive substances

Safety instructions

Safety Devices

Overflow valve with two pressure

switches

Safety valve

Water shortage safeguard

22 EN

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Karcher HDS 9-17-4 C Classic Manual

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