How to identify the effect of circulating water treatment system of the three hazards are scaling, corrosion, microbial algae, to identify the effect of water treatment services is based on the merits of these three aspects. "Industrial circulating cooling water treatment design specifications" (GB50050-95) gives several indicators: 1 open systems fouling resistance value:. 1.72 × 10-4-3.44 × 10-4m2K / W2 closed system. soil thermal resistance less than:. 0.86 × 10-4m2K / W3 corrosion rate of carbon steel pipe wall is less than 0.125mm / a4 copper, copper alloy and stainless steel corrosion rate is less than the wall 0.005 mm / a5 open recirculating cooling water systems. heterotrophic bacteria count of less than 5 × 105 个 / ml; slime less than 4ml / m3 water circulation system should be given water quality analysis report regularly, according to different dosing throughout treatment agent and water quality, there is a corresponding Xuzhou reference index used central air conditioning renovation, the user can initially determine the treatment effect according to water quality analysis reports, and can use of coolant water bubble sheet test and chilled water, cooling water way coupons site monitoring. Outdoor unit installation 1. Note: (1) if possible, avoid axial fan of the wind direction in the face perennial prevailing wind direction, so as not to damage the parts. (2) Do not install the unit in the leaves, insects or other contaminants gathering place, to prevent it from clogging the condenser. (3) To ensure the condensate and defrost water discharge used centralized air conditioning, please access the sewer drains. 2, the installation of the outdoor unit should be firmly fixed, and reliable; addition to meeting the requirements of the cooling air circulation space, we must also comply with environmental protection regulations related to health regulations. 3, the outdoor unit handling, lifting should be used to keep the street perpendicular Xuzhou conditioning parts, it takes the inclination angle of inclination should be less than 45 °, and pay attention to safety in handling, lifting process. Can not the unit casing. 4, the installation location of the outdoor unit must meet the following requirements: around (1) the installation location and other equipment if a strong heat source vent steam when combustible gas, should promptly contact the designer to be adjusted. (2) Influence of the installation position of the outdoor unit in running noise for the neighbors should be less than the state standard of Xuzhou hand air conditioning noise transfer, discharge of heat to deal with neighbor had no effect. (3) The outdoor unit should be installed in a well-ventilated location, if circumstances airflow short circuit, the installation should take measures to solve. (4) The mounting location must have a minimum of maintenance space requirements, ease of future maintenance. Xuzhou used central air conditioning renovation, Sheng Erda refrigeration (certified), second-hand air conditioning provided by Xuzhou 圣尔达 Refrigeration Electrical Services Limited. Xuzhou Sheng Erda Refrigeration Electrical Services Limited (xzktw.com) is in Xuzhou, Jiangsu, heat, refrigeration and air conditioning equipment leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customers needs. In Sheng Erda refrigeration leadership with the staff warmly welcome all inquiries negotiations to create a better future for refrigeration Sheng Erda.