How to adjust centrifugal fan to the best efficiency?

Under different condition, the centrifugal fan efficiency is different. 

1. Full-voltage starting or reduction voltage starting are both OK for centrifugal fan,but the electric current of full-voltage starting is about 5 to 7 times to the rated current. 
When electrical capacity is insufficient, reduction voltage starting is better.

2. Before centrifugal fan commissioning, check whether the wiring methods are consistent with the wiring diagram; whether the working voltage of power supply is conform to the requirements; whether the power supply is lack of phase; whether the capacity of electrical components meet the requirements.

xianrun blower centrifugal fan

3. At least two professional persons check centrifugal fan commissioning, one controls power supply,the other observes the blower working. Stop the centrifugal fan immediately and check for any abnormal phenomena; during the blower running, check the rotation direction firstly; check whether every phase running current is more than rated current.  
Stop running after five minutes, and confirm no abnormal phenomenon, then start operation.

4. Check whether the input current is normal when the fan speed reach normal speed, and centrifugal fan running current should not exceed rated current.If the current exceeds its rated current operation, check whether the supply voltage is normal.

adjust centrifugal fan

5. Centrifugal fan motor power is the biggest power when wind chassis and air inlet open fully. It is better to close the valves of the inlet duct and outlet duct in advance, during the centrifugal blower commission, then open the valves gradually to achieve the required conditions, and and pay attention to whether the working current is more than rated current.