Nitrogen packing: This is the pressure test must be carried out after soldering copper pipe, copper tube filled to a certain pressure of nitrogen packing, Gree central air conditioning, general stress test time was 24 hours. To note: use R410 refrigerant pipe pressure required to maintain 40 kg, R22 refrigerant pipe is required to maintain a pressure of 20 kg. Nitrogen is an inert gas, expansion coefficient is small, there is almost no pressure changes due to thermal expansion and contraction generated. If the gauge has dropped during the test, Gree air conditioning price, you should check whether the refrigerant pipe welding problems. In order to ensure the installation of construction put in place, Gree air conditioning sales, all conventional pressure gauge not to dismantle the 24 hours after packing, keeping out of the machine before the power test was demolished (to avoid loss of refrigerant system error when other decoration and construction) can fully guarantee Safety refrigerant system operation. Central air-conditioning installation requirements - Installation Process and auxiliary central air-conditioning industry known as "third device seven installation" argument, to ensure a central air conditioning system to function properly, all aspects of the product, DPM, design, installation, construction is as important as the host device, the sub-long Gree air conditioning, in general we believe that product quality is better than to install more demanding. Therefore, the user selects a suitable central air-conditioning products, but also to choose a professional central air-conditioning installation strength and user reputation of the company, or specified by the manufacturer authorized installation and maintenance of experienced installation company to ensure that the latter part of the central air-conditioning running effect . About central air conditioning Fucai, also the highest level of the decision of the central air conditioning system is good or bad. Gree air conditioning installation, Xi'an Hao Electrical and Mechanical, 内蒙格 central air force 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) in this area of ??central air conditioning devoted boundless enthusiasm and passion, Xi'an Hao Electrical and Mechanical Services has been customer-centric, to create value for customers The concept of quality, service to win market, and sincerely hope to cooperate with the community to create success, to create brilliant. Related businesses welcome inquiries, contact: Ms. Wong.