Fan debugging

1. After the fan is installed, check the flexibility of the fan rotation before starting. Check whether the blade has the friction phenomenon. Check for any leftovers and other debris in the fan and adjacent pipes.

2. Check if the damper in the duct is open.

3, personnel should be far away from the fan.

4, the fan allows full-voltage start or step-down start, but it should be noted that the full-voltage starting current is 5-7 times the rated current, step-down starting torque is proportional to the square of the voltage, when the power grid capacity is insufficient, should Start with a reduced pressure. (When the power is greater than 15kW, and the use of step-down start).

5. During the test run, the fan should read the product specification carefully and check whether the wiring method is in accordance with the wiring diagram: check whether the working voltage of the fan power supply meets the requirements, whether the power supply is missing phase or the same phase, and whether the capacity of the power distribution component is Meet the requirements.

6, the number of test run is not less than two people, one person to control the power supply, one observed the operation of the fan and found that the abnormal phenomenon immediately shut down to check: first check the direction of rotation is correct; fan starts running, it should immediately check the current running phase is balanced, Whether the current exceeds the rated current; if it is abnormal, it should be stopped and checked. After running for five minutes, shut down and check if there is any abnormality in the fan, and confirm that there is no abnormal phenomenon before starting the operation.

7. When testing the two-speed fan, it is necessary to start the low speed first, and check whether the direction of rotation is correct; when the high speed is started, the fan must be stopped before starting again to prevent the high speed reverse rotation, causing the switch tripping and the motor damage.

8. Current test: When the fan is running, it mainly monitors the current of the motor. The current is not only the mark of the fan load, but also the forecast of some abnormal changes. When the fan reaches the normal rotation speed (about 10-20 seconds after the fan is started), use a clamp meter or ammeter to test the phase current of the motor. The current of the fan can't exceed its rated current. If the running current exceeds its rated current, it should be stopped immediately. And check the cause of the problem after the fan has completely stopped running.

9. Operation review: After 30-60 minutes of trial operation, stop again to check whether the fan is abnormal, if no abnormality can be put into normal use.

In addition, it is necessary to frequently check whether the vibration of the motor and the fan is normal and whether there is any friction or abnormal noise. For fans operating in parallel, check whether the fan is operating under surge conditions. In normal operation, if the following circumstances should be detected:

1, the fan produces a strong vibration or rubbing sound;

2. The motor current suddenly rises and exceeds the rated current of the motor;

3. The motor bearing temperature rises sharply.

Fan maintenance

1. Make sure that the fan equipment can operate under the normal use environment;

2. Check whether the blades of the fan are loose and whether the gap between the blade and the fan is normal;

3. Check the fastening environment of the bolts connecting the motor and the casing as scheduled, and check whether the connection between the vibration reduction base and the base is intact.

4. Remove dust and dirt from the leaves on schedule;

5. Replace the grease for motor bearings on schedule, generally adding oil for three months, or r