Henan Shuangxin: How is the fire exhaust fan installed and debugged?

In the fire ventilation system, the fire exhaust fan plays a key role; the correct installation and debugging of the fire exhaust fan is very important. Henan Shuangxin fan manufacturer will show you how to install and debug the fire exhaust fan.

1. The fan is allowed to start at full pressure or start with reduced voltage, but it should be noted that the current at full pressure starting is about 5-7 times the rated current, and the starting torque of reduced voltage is proportional to the square of the voltage. When the power grid capacity is insufficient, the step-down start should be used; when the power is greater than 11KW, the step-down start should be used.

2. When the fan is being tested, read the product manual carefully and check whether the wiring method is consistent with the wiring diagram; carefully check whether the working voltage of the fan power supply meets the requirements, whether the power supply is phase-missing or in the same phase, and whether the capacity of the electrical components to be distributed is not. meet the requirements.

3. There should be no less than two people during the test run, one person controls the power supply, the other person observes the operation of the fan, and immediately stops the inspection if any abnormality is found. First check whether the rotation direction is normal; after the fan starts running, immediately check whether the running current of each phase is balanced and whether the current exceeds the rated current; if there is any abnormal phenomenon, it should be stopped for inspection. After 5 minutes of transportation, stop the fan to check whether there is any abnormal phenomenon, and then start the operation after confirming that there is no abnormal phenomenon.

4. During the test run of the two-speed fan, start the low speed first and check whether the rotation direction is normal. When starting at high speed, the fan must be stopped before starting to prevent the high-speed reverse rotation, which may cause the switch to trip and the motor to be damaged.

5. When the fan reaches the normal speed, it should be measured whether the input current of the fan is normal, and the running current of the fan should not exceed the base rated current. If the running current exceeds the rated current, check whether the supplied voltage is normal.