Use; 1.MHL3-2A, MPYH-14A (MHTFL-14A) Francis two-speed high-temperature exhaust fan for tunnels, underground garage, metallurgy and other high-temperature exhaust, two-speed exhaust fan, in the case of fire, the energy quickly exhaust cooling, fire into the disaster area to assist firefighters, fire safety is an essential facility. 2, the type of gas transportation: air and other non-natural, harmless, non-corrosive gases for just, in special circumstances, the choice of explosion-proof Francis fan. 3, impurity gases inside: adhesive materials are allowed within the gas contained in the dust and hard particles is not greater than 150mg / m3. 4, the temperature of the gas: MHL3-2A, MPYH-14A (MHTFL 1. When the test at least two persons, one person control power, one observes fan operation, abnormal phenomenon immediately stop inspection; First check the direction of rotation is correct; Fan process, should check the operating current of each phase is balanced, the current exceeds the rated current; if not normal, vertical exhaust fan should stop after five minutes checking operation, the fan down to check whether there are anomalies, confirm no. .2 anomalies start running again when the two-speed fan test, you should start low, and check the direction of rotation is correct; after resting fan must be renewed at the start speed to prevent reverse rotation speed, causing the switch trips and motor impairment 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, KM3, KM2 communication is only closable, Wuhu exhaust fan, thus eliminating the main way back control of three-phase short .② agile methods, both direct start / stop exhaust fan in the fire control room, and on-site spot control, either manually controlled, and self-control of the motor control in the figure .③ way home, after the implementation of the winding exchange, A2 termination of the motor in the power of L3 phase, C2 termination in the L1 phase, before exchange, L3 phase power supply is connected to the terminals C1 so casually Chu wire end of a two-phase conversion, then received a three-phase power supply, exhaust fan impeller to ensure that the motor quick-change from low to fall to the same, eliminating the motor reversal. Of course there is more shifting membership level speed, only suitable for screening does not require a very smooth adjustment to change, but control of simple credible, financial useful to repair the same convenient dual speed exhaust fan, Chen Yu-conditioned (certified), Wuhu exhaust fan by the wucheng Air Conditioning Equipment Co., Ltd. Chen Yu Wu Chen-yu City Air Conditioning Equipment Co., Ltd. (www.wccykt.com) is an industry leader in Shandong Dezhou, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation and development, honesty and trustworthiness policy, and satisfy customer needs. In Chenyu air conditioning leadership with the staff warmly welcome all inquiries negotiations to create Chenyu air conditioning better future.