Failure fresh air unit malfunction new air unit is mainly the heat exchanger is the cracking, a building chillers using VAV air conditioning system, a total investment of people running from the emergence of four new air unit Donglie accident ceiling fresh air unit from construction to commissioning and then, the building A total of 15 new air unit, the cracking of the proportion of up to 27%. The reason, a) temporary pipeline without rinsing that the new air unit supply; to catch up period is often temporary heating with a new air unit, but because of time constraints entire heating system is not officially washed with water supply and return piping used in all the competent connected manifolds The connection fitting new air handling units, the results of an in-line dirt away from the continuous deposition heat transfer stations within the last fresh air unit heaters, declining water flow, causing the heater cracking. In essence, the construction of temporary water supply pipeline construction procedures fails to wash blindly put into use caused the cracking heater. New air unit fan motor: A: Units used for double inlet centrifugal blower fan, rigorous static and dynamic balance test new air handling units offer smooth operation. B: fan bearings airtight ball bearings, plus a pre-lubricating and self-aligning and automatic self-locking, thrust, and other functions. Normal use and maintenance-free. Filters: Horizontal fresh air unit using coarse filter plate. Nylon mesh filter using a convex, can be repeatedly cleaned. Cooler: cooler of the selected parameters for the CAD / coil design software, the standard cooler for φ16 brass, brass strings using corrugated aluminum fin tube method with its overall rise up tight. Brass using staggered, so that there is a high heat transfer performance, low flow resistance and excellent corrosion resistance, thus ensuring cooler with a high heat transfer coefficient and long service life. Horizontal fresh air unit, Rui Xincheng air conditioning (certified), Xilin Gol League in the new air unit provided by Rui Xincheng Air Conditioning Equipment Co., Texas. Texas Rui Xincheng Air Conditioning Equipment Co., Ltd. (www.dzrxckt.com) is a leader in Dezhou, fans, ventilation equipment, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Rui Xincheng conditioning in leadership with the staff warmly welcome all inquiries negotiations to create a better future Rui Xincheng air conditioning.