Vacuum: The outdoor unit is installed in front of the filling refrigerant requires refrigerant pipe vacuum, central air conditioning, the air tube is withdrawn to keep the tube dry, no water, central air-conditioning manufacturers, or air and water would be mixed with the refrigerant to produce ice crystals , can cause serious damage to the equipment. Specifications: After the refrigerant pipe needs to be connected to the outer machine operation; vacuum time is generally much less than two hours online, Hanyin central air conditioning, a drag of a wind machines less than 20 minutes. Decoration construction workers warned: brass refrigerant and condensate drain pipe through the place furnished, must be careful not to damage the insulation, not to damage the pipe itself, pay attention not to nail to nail. In particular, copper tubes embedded in the wall of the refrigerant and condensate drain pipe, be sure to mark the location and direction in drawing form, to the person in charge of construction and decoration, and to remind the vicinity of the position or a nail holes are not allowed. Central air conditioning manufacturers | Hanyin central air conditioning | Xi'an Hao Electrical and Mechanical Services (Views) 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!