– 5 DangerRisk of injury. If you use the short spraylance/adapter, the use of point spray noz-zles is not permitted. WarningUnsuitable detergents can cause damageto the appliance and to the object to becleaned. Use only those detergents thathave been approved by Kärcher. Observethe dosage and other instructions providedwith these detergents. For consideratetreatment of the environment use detergenteconomically.Follow the safety instructions for using de-tergents.Kärcher detergents ensure smooth func-tioning. Please consult us or ask for ourcatalogue or our detergent informationsheets. Place the detergent bottle into the bottleholder on the appliance or place a de-tergent container next to the appliance..Two different detergents can be simul-taneously placed into the appliance. Pull the detergent suction hose out andimmerse it into the detergent bottle orcontainer. Screw the lid onto the bottle or the con-tainer. Set nozzle to "CHEM". Set the detergentdosing valve tothe desired deter-gent and concen-tration. Spray the detergent sparingly on thedry surface and allow it to react, but notto dry. Spray off loosened dirt with the high-pressure ray. After operations, dip the filter in clearwater. Turn the dosing valve to thehighest detergent concentration. Startthe appliance and rinse for one minute. Release the lever of the hand-spraygun; the device will switch off. Release again the lever of the hand-spray gun; the device will switch onagain. Set the appliance switch to "0". Disconnect the mains plug from thesocket. Shut off water supply. Activate hand spray gun until device ispressure-less. Press the safety lever of the hand-spraygun to secure the lever of the pistolagainst being released accidentally.Only on HD 9/20-4...: DangerDanger of scalding by means of hot water.The water remaining in the switched off de-vice can get heated up. When you removethe hose from the water inlet, the heatedwater can spray out and cause scalding.Remove the hose only when the device hascooled down.Operation with detergentRecommended cleaning methodInterrupting operationTurn off the appliance22 EN