Qitaihe exhaust fan, exhaust fan fire, GREAT air conditioning (certified merchants) are provided by air-conditioning Equipment Co., Ltd. Shandong GREAT fan. Air Conditioning Equipment Co., Ltd. Shandong GREAT fan (www.greatfengji.com) is specialized in "all kinds of exhaust fans, fire dampers, air box, new air handling units, fresh air ventilator," the business, the company adhering to the "honesty, hard service "concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Li. Before installation should carefully check whether the blades and chassis after shipping damage or deformation due, or should be repaired before installation. 2. Check for loose bolts, before fans start, first check within Shaanxi two-speed exhaust fan duct interfere with or without rotation of items. 3. Check the motor insulation performance is good, to see whether the friction power after the collision and abnormal vibration. The reason a lot of fan vibration, Shandong Pacific two-speed exhaust fan were checked from the following aspects: a, impeller and duct with friction, and audible and vibration abnormality; b, foot bolts not stand firm, also large vibration occurs; connecting bolts c, impeller and sleeve loose; d, with the motor bracket bolts loose impeller cause imbalance, bearing damage caused by excessive vibration. 5. At room temperature operation found the motor temperature is too high, Shaanxi two-speed exhaust fan may be caused by the following reasons: a, motor bearing damage, with the gap is small htf exhaust fan, does not meet the requirements; b, the shaft and the bearing mounting tilt, bearing two different axes; c, three-phase power supply voltage is too low or run-off phase. 6. The exhaust port and two-speed exhaust fan Shandong Pacific interlock device should be located, when any one exhaust port open, exhaust fan that is able to automatically start. Texas Pacific Group Limited is a collection of central air-conditioning equipment and refrigeration end, fire ventilation equipment, glass and steel products, such as several major products of research, design, development, production, sales and installation in one of the modern large enterprise groups. All products are the lowest prices in the hot, welcome you to contact us, we will warm service and the best quality of products and services for everyone! Exhaust fan selection of main control parameters for the working temperature dtf exhaust fan, air volume, total pressure htf exhaust fan, efficiency, noise, electrical power, speed and shaft power. 2. The exhaust fan at medium temperature not higher than 85 ℃ conditions should be long-term normal operation. 3. The exhaust fan shall ensure that: When the transmission medium temperature at 280 ℃ when the exhaust fan can work continuously 30min and medium temperature cooled to ambient temperature still continuous running. Fire performance HTF fan performance table is listed in the most efficient range of performance, according to the air volume is divided into five-point performance exhaust fan fire, according to prevail in the selection of the performance table. Fire fan factory qualified under rated air flow, total pressure value error does not exceed ± 5%, the performance of the selection table is a performance standard state, regardless of the technical documentation