1. Commissioning number less than two, one to control power, one observes fan operation, abnormal phenomenon immediately stop inspection; First check the direction of rotation is correct; fan during each phase of the operation should be checked whether the current balance, current is exceed the rated current; if not normal, you should stop checking. Five minutes after the operation, exhaust fan size, fan down to check whether there is abnormal phenomenon, confirmed that no anomalies start running again. 2. A two-speed fan test, it should start low, and check the direction of rotation is correct; it must be stationary fan speed after starting anew, to prevent the high-speed reverse rotation, causing the switch trips and motor damage. Two-speed exhaust fan in high-rise building fire smoke system for high-level basement usually work accident smoke exhaust state two-speed, two-speed asynchronous motor is particularly suitable. Two-speed fan running at high speed into a low-speed synchronous speed improve a lot, the amount of exhaust greatly improved accordingly, then the system immediately replaced by the exhaust smoke condition. But in the design process, will encounter Electric two-speed fan control problems, that is how to solve the motor windings from Δ-connected to a dual-Y-connected conversion and interlock, fire linkage automatic and manual control; fan at high speed and reliability of protection shutdown how to maximize safety incidents smoke, how to ensure that the power supply and other issues. The advantage of the phone as follows (with the next): ① series in KM3, KM2 Turns way home KMI help normally closed contacts with interlocks performance, only after KMl main contacts open, Baoding exhaust fan, KM3, KM2 contact is closed before, thus eliminating the main way back three-phase short circuit. ② flexible control method, both directly in the fire control room start / stop exhaust fan, and on-site spot control, either manually controlled, and self-control. ③ in the figure the way home motor control, temperature exhaust fan, after the implementation of the exchange in the winding, exhaust fan manufacturers, A2 termination of the motor in the power phase L3, C2 termination in the L1 phase, before exchange, power L3 Phase C1 is connected to the terminal, so casually Chu line end of a two-phase conversion, then received a three-phase power to ensure the motor quick-change from low to fall to the same, eliminating the motor reversal. Although the above gear belonging to a level speed, only suitable for screening does not require smooth adjustment to a very changed, but simple control of credible, financial useful to repair the same convenient. Baoding exhaust fan, Chen Yu air conditioning, exhaust fan later by Wu Cheng Chen-yu air-conditioning Limited. Baoding exhaust fan, Chen Yu air conditioning, exhaust fan buy is wucheng Chenyu Air Conditioning Equipment Co., Ltd. (www.wccykt.com) this year introduced a new upgrade, the above picture is for reference only, please call or pictures on this page contact telephone number, to obtain the latest information, contact: sand manager.