Define a new air unit is an air-conditioning equipment to provide fresh air. By the use of environmental requirements on temperature and humidity functions can be achieved or simply provide fresh air. Works by extracting the fresh outdoor air through after dust removal, dehumidification (or wet) and cooling (or heating) and other treatment to the interior through the fan, replace the existing indoor air when entering the interior. Of course, the above mentioned features according to the needs of the environment have to be, the higher the cost function more complete. To protect indoor air quality, interior space is equipped with centralized air system, while the supply of fresh air and fresh air for processing new air unit is called the host. Room temperature control systems for some fresh air DC unit horizontal, fresh air environment meets health standards not only make, but also bear all the indoor load. Because the indoor load is changed, then use the inevitable way to control the supply air temperature can not meet indoor requirements (possibly too hot or too cold). It is necessary to control the temperature of the place of use. It can be seen, when the temperature sensor must be located in a typical area controlled room. Since the current system is generally provided with ventilation systems, temperature sensor located in the exhaust pipe and to consider certain amendments also a viable option. New air handling units controlled frost protection device to manually adjust the heater when the flow out of control; it must guarantee the nominal water flow fresh air units in winter, the heater water flow is too small can cause the cracking accident. Wind parameters serving the building standard layer of constant new air handling units, hot water heater flow remains unchanged, so these new air unit rarely Donglie accident. And in the basement of the new air handling units for building underground kitchen and restaurant services, due to the kitchen ventilation require a lot of air conditioning makeup air lifting fresh air unit, so the new air unit it is necessary to undertake outdoor air pretreatment (simultaneous to the indoor air make-up) function, and To meet the need to adjust the room air temperature. In the cold winter weather, the air conditioning load is small basement, when the operator find room temperature is too high, due to the rush to lower the temperature, the water flow of new air unit heaters instantly up too low, then the new air unit controlled frost protection device failure, If the outdoor temperature is below 0 ℃ new air unit, the cracking heater accident prone. The incident shows that the building of building automation software is imperfect, controlled frost protection device manual control when water flow control and the new air unit out of touch new air unit, the water flow of new air handling units can be arbitrarily reduced, leaving a security risk. At the same time, the operator also inexperienced new air conditioning units for safe operation, only pay attention to the indoor temperature control and runs the risk. The new air unit _ _ Rui Xincheng Urumqi fresh air unit air conditioning provided by the Texas Air Conditioning Equipment Co., Ltd. Rui Xincheng. Rui Xincheng Texas Air Conditioning Equipment Co. (www.dzrxckt.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 Rui Xincheng into the brilliant air conditioning and you work for a better future!