Matching electric motor power of ventilator denotes internal power plus safety coefficient of electric motor capacity in special operating condition,it does not denote the power reqiored during full opening of airoutlet.Therefore no-load running of ventilator without any applied resistance is strictly prohibited in order to avoid burning out of the motor caused by its operation at over rated power.

      The performance of fans are tested using standard motor.We also can change the motors rating speed to meet the demands from customers.

      During transportation, charge and discharge, it is strictly prohibited to shock the ventilators or put them in wet and corrosive place.

      Following the installation, the impeller should be turned by hand to make sure that it turns freely.Once this is verified, the ventilator can be operated normally

      After installing,inside of,the scroll should be inspected.There should not be tools and extra matters remained in the body.

       Prior to operation, it is necessary to check the rotating direction of the impeller and it should be in accordance with the sign on the side plate.