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Chapter 5, Operating Instructions: Vacuum System Operation 11. When using the pressure washer to aid in vacuuming, turn the Vacuum/Pressure Washer switch to the BOTH position. Figure 5-15. To use both the washer and vacuum, turn the Vacuum/Pressure Washer switch to the BOTH position. 12. Vacuum the work site to remove the water or debris. Note the following guidelines when operating the vacuum: - - - When vacuuming water, do not submerge the tip of the wand. Skim the surface of the water with the wand to prevent opening the vacuum relief valves. Monitor the vacuum pressure. Normal operation should have a vacuum level of about 5”. If the filter or wand is clogged, the vacuum will rise to 11”. Shut the vacuum off and check the filter, wand, and hose. Vacuuming dry debris may be easier if the pressure washer is used to wet the material into a slurry. The pressure washer may be used to “dig” around hydrants or other equipment to loosen and remove material. E.H. Wachs Part No. 77-MAN-21, Rev. 1-0809 Monitor the pressure on the vacuum gauge while operating the vacuum. 57