HTF series exhaust fan fire for high-rise buildings, underground buildings and tunnels, drying room and other high-temperature exhaust or ventilation. Continuous operation at 280 ℃ under the high temperature for 30 minutes or more, the medium temperature at 100 ℃ continuous operation 20 hours / times without damage, fire is the ideal necessary facilities. 1, the performance of the fan performance table lists the properties in the most efficient range, according to the performance of the air volume is divided into five working points, according to prevail in the selection of the performance table. Qualified fan factory exhaust fan is quoted in the rated flow, total pressure error does not exceed ± 5% exhaust fan, performance selection table is performance under standard conditions, regardless of the technical documentation or performance requirements are standard state orders prevail; 2, the wind turbine installation can be divided into horizontal and roof type, air volume, total pressure, dimensions and other properties have special requirements; HTF temperature exhaust fan fire a detailed description of high-temperature exhaust fan fire widely used HTF in high-rise buildings, drying room, underground garage, subway tunnels and other occasions to send fire smoke and exhaust ventilation. Press GA211-1999 Fire fan high temperature test methods, can run at 400 ℃ more than 100 minutes of continuous high temperature, medium temperature at 100 ℃ continuous operation 20 hours / time is not damaged, it has been approved for use by fire departments in major cities nationwide. Fans of the series may use the occasion of the installation requirements, peripherals silencer box, made HTF (A) -X box-shaped exhaust fan the fire. Two-speed exhaust fan is increasingly used in high-level basement, garage exhaust ventilation exhaust fan power in military city, so when installed wiring must pay attention to the normative method, the size of today's knit tells you about two-speed fan wiring methods: Large two-speed exhaust fan wiring methods: In general, the distribution of electrical power in the following 4KW Y wiring; 4KW or more (including 4KW) △ connection. Large air-conditioned two-speed fan of the group with double speed motor stator winding is △ / YY (or Y / YY) connection. Two-speed exhaust fan control principle: The Company two-speed fan motors which are equipped with double quick set stator windings △ / YY (or Y / YY) connection, the connection speed by changing the basic principles of the method of stator windings, so which changes the number of poles in order to achieve the purpose of speed, low-speed work for △ (or Y) method; high-speed operation mode when YY. Wind the electrical control box with circuit breaker, protection devices and other electrical components, according to the fan must be properly reasonable matching the rated capacity. Exhaust fan Model | exhaust fan | Chenyu conditioned by Wu Cheng Chen-yu air-conditioning Limited. Wu Cheng Chen-yu air-conditioning Co. (www.wccykt.com) strong, credible, Shandong Texas 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 into the brilliant air conditioning and you work for a better future!