HDS 1000 DE
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4. Removal of internal deposits
If there are internal deposits in the pipe lines, the flow resistance increases with the result that the
overflow protection can switch over.
Accordingtolegalregulations,onlyboilercleansingcompoundswhichhavecertificationmarkscanbe
used to remove the deposits:
RM100 6.287-008 dissolves limestone and simple compounds consisting of limestone
and detergent residues.
RM101 6.287-013 dissolves deposits which cannot be dissolved with RM 100.
Procedure
Caution!
The gases that are given off are combustible.
Do not smoke and provide good ventilation.
– Fill a 20-litre container 3/4 full of water.
– Add one litre of boiler-cleansing compound to the 15 litres of water.
– Connect water hose direct to the pump head and hang the free end in the container.
– Connect the spray lance without nozzle and insert in the container.
– Switch unit switch to “Burner on”, until approx. 40 °C has been reached.
– Turn off unit and let it stand for 20 minutes.
– Then pump the unit until empty.
Caution: When the descaling process is in action, the handgun must always remain pressed.
– To conclude, we recommend the use of an alkaline solution (e.g. RM 81) to be pumped through the
unitvia thedetergenttank to provideprotectionagainst corrosion andtoneutralise the acidresidue.
5. Repairs
Thesafetyvalve isadjusted andsealedinthefactory;itmay notbe changed.Checkingoftheoverflow
valve and safety valve should be carried out only by a specialist technician.
6. High-pressure hoses
Devote special attention to the hoses. Every high-pressure hose must accord with the safety
regulations and must be marked with the maximum permitted operating pressure, the manufacturer’s
set date for usage and the manufacturer.
High-pressure hoses may not be kinked, stretched, crushed or damaged in any other way. Damaged
high-pressure hoses are in danger of bursting and must be replaced without delay.
High-pressurehosesof short service life and those which are notrepairedproperly are extraordinarily
dangerous. Therefore use only certificated and marked high-pressure hoses.
Kärcher original high-pressure hoses meet the safety requirements.
7. Notes on the fuel pump for the burner
Evenwhenthe unit is running in cold-water mode, it mustnotbe allowed to operated without fuel oil or
diesel in the fuel tank, otherwise there is a danger that the fuel pump will dry-run and in consequence
the drive clutch and fuel pump will be destroyed.