Detailed temperature of high-temperature exhaust fan fire HTF HTF fire exhaust fan is widely used in high buildings, drying room, underground garage, subway, tunnels and other occasions and sent fire smoke 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. Fan Use: MHL3-2A, MPYH-14A (MHTFL-14A) Francis two-speed high-temperature exhaust fan can be used as high-temperature exhaust, ventilation dual-use conditions are as follows: 1, MHL3-2A, MPYH-14A (MHTFL -14A) Francis two-speed high-temperature exhaust fan for tunnels, underground garage, metallurgy and other high-temperature exhaust, in the case of fire exhaust fan specifications, can quickly exhaust cooling, into the disaster area to assist firefighters extinguishing exhaust fan , fire safety is an essential facility. Two-speed exhaust fan is increasingly used in high-level basement, garage ventilation exhaust work, then the installation must pay attention to the normative wiring method, the size of today tells you what knit two-speed fan Connection: Large two-speed exhaust fan wiring methods: In general exhaust fan flow, 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 exhaust fan quote, by changing the basic principles of speed between the stator windings connection method to change the number of poles in order to achieve the purpose of speed, low-speed work for △ (or Y) method; high-speed operation mode is 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 use, Chen Yu-conditioned (certified), exhaust fan by Wu Cheng Chen-yu air-conditioning Limited. Wu Cheng Chen-yu air-conditioning Co. (www.wccykt.com) is an industry leader in Shandong Dezhou, fans, ventilation equipment, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Chen Yu-conditioned in leadership with the staff warmly welcome all inquiries negotiations to create Chenyu air conditioning better future.