Kärcher HDS3.5/20 Operator's Manual

Also see for HDS 3.9/30: Operator's manual Dealer's manual

Contents

9.801-509.0 - C • Karcher Operator's Manual27PRESSURE WASHER MAN UALMAINTENANCE & SERVICE2. TO CLEAN BURNER JETS:Select proper size drill for type gas involved. Usepin vise to hold drill and ream out each jet orifi ce.CAUTION: Do not ream out orifices to alarger size.If the water heater will be exposed to freezing weather,an anti-freeze solution should be circulated through thecoil by whatever means are available for the particularsystem the water heater is used on.To Adjust Pressure RegulatorAdjustment of the pressure regulator is not normallynecessary since it is preset at the factory. However,fi eld adjustment may be accomplished as follows:1. Manometer attachment may be accomplished atthe pressure tap plug.2. Remove regulator adjustment screw cap (seeFigure 5, page 23).3. With small screwdriver, rotate adjustment screwclockwise to increase, or counterclockwise todecrease pressure.4. Replace regulator adjustment screw cap.