English Operating Instructions26Reference to operatinginstructionsAll of the item numbers described below inthe operating instructions are referenced inthe illustration of the unit.CommissioningWarning!Unit, piping, high-pressure hose andconnections must be in perfect workingorder!! Lock the hand brake.Checking oil levelFig. 1Warning!Immediately consult the Kärcher servicestation when oil turns milky!! If oil level is approaching MIN mark, fillup with oil as far as MAX mark.! Seal oil filler inlet.Refer to technical data for oil grade.Filling with scale inhibitorFig. 2(sample pack included with scope ofdelivery)Scale inhibitor stops heating coil becomingcalcified when using hard tap water. Is ismetered in at the inlet in the water reservoirone drop at a time.By the manufacturer metering is set to amean water hardness.! For other water hardnesses requestservices of a Kärcher service station andhave it adapted to local conditions.Filling with fuelWarning!Never operate unit with fuel tank empty!Fuel pump would otherwise be destroyed!Warning!Fig. 3Only fill with diesel fuel or light fuel oil.It is forbidden to use unsuitable fuels,e.g. benzine (explosion hazard, damage tounit).! Close tank cap! Wipe off excess fuelFill with cleaning agent— Use only Kärcher products.— Never pour in solvent (petrol, acetone,thinner etc.)!— Avoid contact with eyes and skin— Pay attention to cleaning-agentmanufacturer's instructions on safetyand handlingKärcher offers a customised cleaningand care agent range.Your dealer will be pleased to advise you.Fig. 4Fill with cleaning agent