Dewalt DCPW550B Instruction Manual - Page 14

English Speed Selector (Fig. A, K) This power cleaner gives you the choice to operate at a lower pressure for more delicate jobs, or accelerate the power cleaner speed for high‑performance cleaning. To accelerate, pull the speed selector 19 back toward the main handle 1 into the "HI" position. This mode is best for applications that need higher PSI. For low pressure, push the speed selector forward toward the spray wand 8 into the "LO" position. This mode is best for larger projects that require more time to complete. NOTE: When in "HI" mode, runtime will be decreased as compared to when pressure cleaner is in "LO" mode. Pressure Washing Preparing Surface for Cleaning • Remove objects from the area which could create a hazard. • Ensure that all doors and windows are closed tight. Protect all plants and trees in the adjacent area with a drop cloth ensuring that they will not be harmed by any overspray. • Pre‑rinse cleaning area with fresh water. • Use only detergents formulated for pressure washers. • Always test detergent in an inconspicuous area before use. Preparing Power Cleaner Unit for Use  DANGER: Risk of fluid injection and laceration. When using the high‑pressure setting, DO NOT allow the high‑pressure spray to come in contact with unprotected skin, eyes, or with any pets or animals. Serious injury will occur.  CAUTION: Before operation: • Connect the water supply to the power cleaner. For instructions on connecting the water supply to the power cleaner, please refer to Attaching Garden or Suction Hose under Assembly and Adjustments. • Connect the pressure spray wand, soap bottle, or other attachment. For instructions on connecting the pressure spray wand, please refer to To Attach the Spray Wand, Soap Bottle or other Attachment under Assembly and Adjustments. Preparing the Power Cleaner (Fig. L) IMPORTANT: Disengage the trigger lock‑off 4 , squeeze the trigger 6 and hold the trigger for 30 seconds to purge the system of air. If air is still found in the water stream, continue to run water through the spray handle. 1. Disengage the trigger lock‑off 4 . 2. Squeeze the trigger 6 . Cleaning a Surface (Fig. L)  WARNING: Risk of injury from spray. Always engage the trigger lock when gun is not in use. Failure to do so could cause accidental spraying. 1. To start the power cleaner, disengage the trigger lock‑off 4 and squeeze the trigger 6 . NOTE: The best angle for spraying water against a cleaning surface is 45 °. Spraying head on tends to cause dirt particles to embed in the surface. When working on vertical surfaces, it is best to apply detergent starting at the bottom and working upwards which will prevent the detergent from sliding down and causing streaks. 2. To stop the power cleaner, release the trigger. NOTE: Excessive pump pressure may be the result of a clogged nozzle or brass coupling. Always turn off the power cleaner and remove the battery before attempting to unclog a nozzle or brass coupler.  WARNING: Never draw from water that contains chemicals. Only draw from fresh water sources. Shutdown (Fig. A) 1. To stop the power cleaner, release the trigger and remove the battery. 2. Turn off water at the faucet. 3. Discharge residual pressure by squeezing the trigger 6 until no more water comes out of the spray wand 8 . 4. Disconnect the garden hose from the water intake 3 and drain hose. 5. Remove garden hose from power cleaner by pulling back the collar on the quick connect hose adapter and removing it from the quick connect filter. MAINTENANCE  WARNING: To reduce the risk of serious personal injury, turn unit off and remove the battery pack before making any adjustments or removing/ installing attachments or accessories. An accidental start‑up can cause injury. Cleaning  WARNING: Blow dirt and dust out of all air vents with clean, dry air at least once a week. To minimize the risk of eye injury, always wear ANSI Z87.1 approved eye protection when performing this procedure.  WARNING: Never use solvents or other harsh chemicals for cleaning the non‑metallic parts of the tool. These chemicals may weaken the plastic materials used in these parts. Use a cloth dampened only with water and mild soap. Never let any liquid get inside the tool; never immerse any part of the tool into a liquid. Nozzle (Fig. A, H) If the nozzle becomes clogged with foreign materials, such as dirt, excessive pressure may develop. If the nozzle becomes partially clogged or restricted, the pump pressure will pulsate. Clean the nozzle immediately. 1. Shut off the power cleaner 2 and turn off the water supply. 2. Pull trigger 6 on main handle 1 to relieve any water pressure. 3. Remove the nozzle from the spray wand 8 by pulling the quick connect collar 9 toward the spray wand. 12