Vacuum: The outdoor unit is installed in front of the filling refrigerant requires refrigerant pipe evacuated, the air inside the tube out of central air conditioning offer the United States, holding the inner tube dry and free of moisture, or air and water will be with the refrigerant mixed to produce ice crystals, serious It can cause equipment damage. Specifications: After the refrigerant pipe needs to be connected to the outer machine operation; vacuum time is generally much less than two hours online, a drag of a wind machines less than 20 minutes. Central air conditioning installation requirements - storey buildings and area each case for installation of central air conditioning, installation of central air conditioning really suitable housing, Yulin US central air conditioning, you need to have the following basic conditions: first houses to be high enough, the US central air conditioning, floor at least 2.7 meters high, the domestic housing in general can reach this height; followed by space requirements, to be exact, so the houses are suitable for installation of central air conditioning, central air-conditioning units can simultaneously meet the requirements of more than one room for three rooms a hall or Sanshierting more room, the installation of a central air conditioning requirements are not higher than the installation of split type and Guiji, the US central air conditioning prices, but if the house area less than 60 sq m, installation of central air conditioning it is not cost-effective. Overall, the room size is larger, the area of ??use, installation of central air conditioning more affordable. America's central air-conditioning sales | Xunyi US central air conditioning | Xi'an Hao Electrical and Mechanical Services provided by the Xi'an Hao Electrical and Mechanical Technology Limited. Xi'an Hao Electrical and Mechanical Technology Co., Ltd. (www.029hfkt.com/)(www.029hfkt.com) is a professional "central air conditioning" of the company. Since its inception, we adhere to the "good faith, sound management" approach, the courage of healthy competition in the market, so that the "Gree" brand has a good reputation. We adhere to the "service first, customer first" principle, so that Xi'an Hao Electrical and Mechanical Services has won the trust of customers congregation in central air conditioning, and establish a good corporate image. Special Note: This information is for reference only pictures and information, please contact us to obtain the most accurate information, thank you!