Model: HIF-II (double speed) series fire exhaust fan, high temperature motor, totally enclosed motor built-in dual-speed exhaust fan, with high specific motor cooling system efficiency, low noise, reasonable structure, small size, installation easy to apply: high-rise buildings, drying room, underground garage, or high-temperature exhaust ventilation. Capable of continuous operation at 300 degree heat for 60 minutes or more, the medium temperature conditions of continuous operation at 100 degrees 20 hours / times without damage, fire is the ideal necessary equipment. 1. htf centrifugal fan wind chassis exhaust fan fire, electrical power is the desired conditions to be determined, together with the proper mechanical losses in terms of reserves, not the required full power outlet, such as the fan outlet pipe is not connected or add external resistance and empty running, the motor burned in danger, for safety reasons, the valve should be added at the fan outlet or inlet line, starting off the fan, running after Slowly open the valve, the required conditions of high temperature exhaust fan up and pay attention to fan current exceeds a predetermined value. 2. Fan allow full voltage start or step-down start, but it should be noted that the exhaust fan, the current full-voltage starting time is 5 to 7 times the rated current, voltage starting torque is proportional to the square of the voltage, insufficient grid capacity when should be used to step-down start. (When the power is greater than 11KW, should buck starter). Temperature exhaust fan | Liaoyuan exhaust fan | Chen Yu-conditioned factory outlets provided by Wu Cheng Chen-yu air-conditioning Limited. Wu Cheng Chen Yu Air Conditioning Equipment Co., Ltd. (www.wccykt.com) strong, credible, in Dezhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Chenyu air conditioning and you hand into the brilliant, for a better future!