One: The large fan products have the characteristics of low speed and high torque when running. Do not follow reasonable and normal switching steps to start and stop, especially before turning off, remember to adjust the speed of the inverter to the lowest, and when the fan has normal operation and tends to stand still Set the shutdown knob to the "stop position" to avoid direct shutdown and potential safety hazards.
2: Generally, large fans can be installed in the installation place with or without driving, but there should be an installation and safe height of 1.5 meters or more from the top of the driving to the roof.
Three: The roof of the building of the airport is not insulated. The installation needs to consider the use of fan installation extension rods, so that the fan blades are as far away from the roof as possible, so that hot air above the space can be prevented from being driven by the large fan to the working area below.