Ventilation fans instructions

Ventilation fans special note as following

1. Ventilation fans shell or motor shell ground connection must be reliable.
2. Ventilation fans to spin must accurate, banned excess rated current operation; Banned phase lack operation.
3. Refuel of Bearings are not less than 1000 hours/time.
4. Banned in operation of Ventilation fans in maintenance.
5. With 500 V megohm measurement Ventilation fans shell and between the motor winding insulation resistance.The value should be greater than 0.5 M Ω (because the use of the power source of the 380 V so minimum cannot under 0.38 M Ω); If the dealing with motor winding drying processing, drying temperature not allowed more than 120 ℃.
6. Carefully check Ventilation fans in the transport process for deformation or damage, if there's any loose or fasteners falls off, whether there is a brush touch impeller phenomenon.
7. Ventilation fans allow total pressure of the start or step-down start, but should pay attention to, all the pressure activated when the current is about 5-7 rated current of The Times, step-down start torque and voltage is proportional to the, when power network capacity is insufficient, should use step-down start. (when power more than 11 KW, appropriate USES step-down start).
8. If testing of ventilation fan operating current found more than rated current, power supply voltage is normal to confirm.
9. The number of test run shall not be less than 2 people, a people control power, one of ventilation fans observe operation situation, found that the abnormal phenomenon is necessary to stop the machine immediately check. Check: fan to spin, fan action part if there is rubbed phenomenon, running current is not more than ratings, three whether three-phase balance.
10. Two-speed fan should first try to low speed, and check to spin is proper; Start high speed should stay static any fan after startup, in case of high speed and reverse rotation and motor damage caused by trip switch.
11. Ventilation fans commissioning, fully open 2 for large power, test run that best will import valve closed fan, after the operation will gradually open valve, and watch the fan operation current is not more than the rated current.

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