Install and use 1 Please pay attention to clean the connecting pipes and joints during installation, so as not to bring dirt into the air duct 2 When installing, pay attention to whether the airflow direction is consistent with the direction indicated by the arrow on the fuselage, and pay attention to whether the connection and tooth shape are correct. 3 Pressure adjustment: Pull up the pressure adjustment knob and turn it clockwise to increase the pressure. Rotate counterclockwise, the pressure drops. Adjust to the desired pressure and press the pressure adjustment knob to lock it. Maintain 1 Cleaning/replacement of the filter element: Take out the filter element, blow it from the inside out with air, and then use it again.