Service conditions of cooling fan: 1. The ambient temperature should be+75 ℃ ≥ - 40 ℃. 2. The industrial gas passing through the cooling fan is not allowed to have strong acids, strong alkalis, and various solutions. 3. Sundries such as sand and dust are not allowed to fall into the fan, to avoid causing the fan to burn out and fan blades to break. Installation and maintenance of cooling fan: 1. Before installation, it should be checked whether there is any damage or deformation caused by packaging and transportation. If there is any damage or deformation, it should be repaired before installation and use. 2. Then check whether all parts and screws are loose; Check whether the blades and the air duct collide or shift. If they collide or shift, they should be adjusted before installation. 3. After the installation of the cooling fan, a test run should be conducted, and the fan can be used online only after it operates normally. 4. When the fan is placed and reused for a long time, it should be checked and tested for operation. If there are no abnormalities, it can be used online. 5. After the installation of the fan, the wiring should be sealed to prevent leakage of the wiring from causing a short circuit and burning the motor.