Karcher HDS-C 7-11 Steel - Manual (Page 25)

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ƽ
Danger
Risk of burns due to hot oil or hot parts of
the plant. Allow pump to cool down for 15
minutes before oil change.
Note
Please dispose off used oil only in the col-
lection points provided for them. Please
hand over old oil, if any, only at such plac-
es. Polluting the environment with used oil
is a punishable offence.
1 Oil container lid
2 Oil drain screw

Keep a collection basin for old oil ready.
 Remove the lid of the oil container.
 Unscrew the oil drain screw and collect
used oil.
 HDS-C 7/11, HDS-C 9/15: Replace O
Ring 11x2 (order no: 6.362-458.0) and
turn in the oild drain screw.
HDS-C 8/15-E: Replace copper washer
14x18 (order no. 7.362-005.0) and turn
in the oil drain screw.
 Slowly fill in new oil until the "MAX"
marking on the oil container.
 Close the oil container with the lid.
 Deliver the old oil to the respective col-
lection centres.
 Loosen covering nut and take off hose.
 Take out sieve.
Note
If necessary turn in screw M8 appr. 5 mm
inwards and therewith pull out sieve.

Clean sieve in water.
 Push sieve inwards.
 Put on hose.
 Tighten covering nut firmly.
There will be calcium deposits in the plant if
the softening plant (optional) is accidentally
out of operation for a long time. Calcium de-
posits in the plant can lead to following dis-
ruptions:
– higher pipe resistances,
– reduced heat transfer at the heat ex-
changers,
– failure of components spoilt on account
of calcium deposits.
In the interest of environmental safety, use
only tested and approved decalcifying
agents (calcium dissolution acids with test
marking) to decalcify. The high pressure
unit should be decalcified using the Kärch-
er calcium solvent.
ƽ
Danger
Only persons trained by Kärcher are au-
thorised to decalcify the plant. Risk of ex-
plosion due to combustible gases! Do not
smoke during decalcification; ensure prop-
er ventilation. Risk of burns injury on ac-
count of acid. Wear protective glasses and
protective gloves.

Unscrew the hand-spray gund and in-
sert the hose in the drainage duct so
that the water can flow freely.
 Set the hot water temperature to 40 °C.
 Shut off water supply.
 Start the washing programme with hot
water until the swimmer container for
fresh water is almost empty.
 Add 0.5 litre calcium solvent to the
swimmer tank for fresh water.
 Leave the water inlet open until the
swimmer tank for fresh water is full
again.
 Switch on the plant briefly and then let
the calcium solvent react. Repeat this
process every 4 to 5 minutes until the
swimmer tank for fresh water is almost
empty.
 Open the water inlet and let the wash-
ing programme with hot water run for 5
minutes until the tank is rinsed.
 Connect the hand-spray gun to the high
pressure hose.
Caution
Danger of damage to the fuel pump. Do not
interchange the forward and backward flow
pipes for fuel. This can cause the fuel
pump to dry run and get damaged.

Pull out the fuel hoses on the fuel pump.
 Remove the fuel tank from the plant.
 Rinse the fuel tank thoroughly (allow
the fuel tank rinsed with water to dry
properly).
 Dispose off fuel residues according to
environment safety laws.
The correct setting of the ignition elec-
trodes is very important for the burner to
function properly. The settings have been
indicated in the above drawing.
Maintenance Works
Oil change
Clean sieve in the water shortage safe-
guard (only HDS-C 7/11, HDS-C 9/15)
Decalcify the heating spiral (only HDS-C
7/11, HDS-C 9/15)
Clean fuel tank (only HDS-C 7/11, HDS-C
9/15)
Electrode setting SB-HDS 7/11
Electrode setting SB-HDS 9/15
25 EN