HDS 2000 SuperGB298. General Information8.1 Safety equipmentOverflow valve with 2 pressure switchesWhen the water flow rate is reduced with theservo compression valve on the hand-held spraygun or with the flow regulator on the pump head,the overflow valve opens and some of the waterflows back to the pump suction side.If the gun is completely closed, enabling all of thewater to flow back to the pump suction side, thepressure switch located on the overflow valveswitches off the pump.If the hand-held spray gun is opened again, thepressure switch located on the cylinder headswitches on the pump again. The overflow valveis set and lead-sealed at the factory.Adjustments must only be carried out by customerservice.Safety valveThe safety valve opens when the pressure switchis defective. The safety valve is set and lead-sealed at the factory. Adjustments may only becarried out by customer service.Low-water safety deviceThe low-water safety device prevents the burnerfrom switching on when the water is low. Astrainer prevents the safety device frombecoming fouled and must be cleaned regularly.8.2 AccessoriesIncorrect, badly fitting or defective accessoriesimpair the function of the appliance and aredangerous. It is advisable to use Kärcheraccessories which are made-to-order. Yourdealer will be glad to advise you.8.3 Spare partsPlease note that the use of other than Kärcherspare parts can result in damage and evenserious accidents if these parts have not beencorrectly manufactured, if they do not replacethe Kärcher spare part exactly or if they result inunsafe operation of the appliance.Kärcher spare parts guarantee that the appliancecan be operated safely and trouble-free.A selection of the most common spare-partnumbers are listed at the end of these operatinginstructions.8.4 GuaranteeThe terms of guarantee issued by our competentdistribution company are valid in every country.If the appliance malfunctions in any way, weshall rectify the fault free of charge within theperiod of guarantee, provided the cause can beattributed to faulty material or a manufacturingerror.The guarantee will only come into force whenyour dealer has completely filled out, stampedand signed the enclosed reply card on completionof sale and when you have sent the reply card tothe distribution company in your country.In the event of a claim on the guarantee, pleaseconsult your dealer with accessories and receiptof purchase or contact your nearest authorizedcustomer service centre.