Three central air conditioning system facing hazard 1, harms - fouling fouling effect on the cooling effect can refer to Table 1. Table 1 shows that air conditioning maintenance, the average thermal conductivity of the scale does not exceed 0.5-0.6 kcal / (m · h · ℃), only 0.15% copper, both of which were very different. Scale will affect heat transfer, which will bring two problems: First, reduce the cooling effect. Heat transfer film coefficient refrigerator condenser tubes are large front and back sides of Xuzhou industrial air conditioning repair phone, so, the impact of fouling resistance due to the scale of the overall heat transfer coefficient is particularly significant in Xuzhou air conditioning maintenance and fluoride, the heat transfer performance degradation . Figure 1 is a scale layer thickness (mm) and decrease the amount of energy consumption (%) relationship, Figure 2 is a dirt layer thickness (mm) and the total increase or decrease in unit cooling capacity (%) relationship. The figure shows, each 0.1 mm thick scale cooling capacity will be reduced by about 14%; secondly, condenser pressure will rise, leading to increased load, but consume more energy. 1 mm scale will consume energy 20-30%, high pressure will cause central air conditioner serious accident shut down the scale. Central air-conditioning design and installation of central air conditioning design and installation time machine selection rather large not small, that small resident population, can reduce the use of room air conditioner models less idea is not correct, the position of the outdoor unit must be placed properly ventilated place, if poor ventilation, air conditioning will greatly affect the ability of the indoor unit on the top position generally not the bathroom or kitchen, if we want to put, you have to develop a good return air program, not in the bathroom or the kitchen back to the wind. Indoor remain confidential manhole to ensure future maintenance, outlet location selection outlet position, to make the air-conditioned area of ??wind energy circulate, outlet size to guarantee a certain outlet size, outlet too much effect on the air conditioning effect. Not because the room temperature has reached the required value or higher than the required value, and often start-up and shut down the air conditioner, but should let the air conditioner through the temperature controller to control the startup and shutdown. Should not use the air conditioner off and unplug the power cord. Air conditioning shut down for whatever reason, due to the general air conditioner did not stop the time delay, then after such a shutdown, although can immediately start the air conditioner, but need to run more than 3 minutes. But no time to delay the air conditioner does not start immediately after the shutdown, then be sure than about 3 minutes, in order to re-open the air conditioner, or may result starting current is too large, burning fuse, and even burned the consequences of the compressor motor. Xuzhou air conditioning maintenance air conditioning maintenance and installation _ _ Sheng Erda refrigeration provided by Xuzhou 圣尔达 Refrigeration Electrical Services Limited. Xuzhou 圣尔达 Refrigeration Electrical Services Limited (xzktw.com) strong, credible, Xuzhou in Jiangsu Province of heat, refrigeration and air conditioning equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Sheng Erda refrigeration into the brilliant and you work for a better future!