To ensure the safety of the booster fan, necessary checks need to be conducted after installation and before the official startup. The specific checks are as follows:
A. Check if the voltage is within the normal range and if the three-phase current is balanced.
B. Check if the clearance between the booster fan impeller and the casing meets the design requirements. Manually rotate the impeller to ensure it is not stuck or rubbing.
C. Check if there are any foreign objects inside the fan casing or pipeline.
D. Verify that the impeller rotation direction matches the fan rotation mark.
E. Ensure that the actual motor speed is consistent with the fan speed.
F. Confirm if the motor protection grounding wire and current protector (fuse) have been installed as required.
Only after passing the overall inspection should adjustments be made. During startup, check if the motor current is overloaded. After startup, check the vibration of the booster fan. If strong vibration is detected, immediately cut off the power and stop for inspection.
In addition to the necessary checks, here are some reminders about issues to pay attention to during operation:
The matching between the booster fan and the system is crucial. During trial operation, ensure the fan is operating within the specified operating conditions to avoid motor current overload or fan surge, as the actual system resistance may deviate too much from the designed system resistance. If such a situation occurs, stop immediately and take appropriate measures to resolve it.
If everything is normal, stop the fan after 10 to 30 minutes of operation to check if the bolts on the impeller are loose. Only after confirming everything is normal should the fan be officially started and put into normal operation.
During normal operation, it is important to monitor the motor current. The current not only represents the fan load but also acts as a signal for potential abnormal events. Additionally, regularly check the motor bearing temperature and fan vibration to ensure there are no abnormal noises, such as friction or collisions.
If any of the following occur during normal operation, immediately stop and inspect or repair: the current suddenly rises above the standard value, strong vibration or friction sounds occur, or the motor bearing temperature increases sharply.
The fan should operate within the specified high-efficiency operating zone once it enters stable operation. Otherwise, it will increase power consumption, generate more vibration, and even shorten the fan’s service life.
The necessary checks before startup are intended to prevent potential issues, while the precautions during operation help identify and address problems promptly, avoiding greater damage. Combining both will ensure safety more effectively. I hope more customers will pay attention to this.