Vacuum: The outdoor unit is installed in front of the filling refrigerant requires refrigerant pipe evacuated, Gree air conditioning installation, air tube is withdrawn to maintain the tube dry and free of moisture, or air and water will be with the refrigerant mixed to produce ice crystals, serious It can cause equipment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, Gree air-conditioning agent, a drag of a wind machines less than 20 minutes. 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 air conditioning sales, 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, Ordos Gree central air conditioning, there is almost no pressure changes due to thermal expansion and contraction generated. If the gauge has dropped the test, you should check whether the refrigerant pipe welding problems. In order to ensure the installation of construction put in place, after all the pressure gauge not to dismantle the conventional 24 hours 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 the safe operation of the refrigerant system . Erdos Gree air conditioning | Xi'an Hao Electrical and Mechanical | Gree air conditioning provided by the Xi'an Hao Electrical and Mechanical Technology Limited. "Central air conditioning" preferred Xi'an Hao Electrical and Mechanical Technology Co., Ltd. (www.029hfkt.com/)(www.029hfkt.com), the company is located: 3 Building in Xi'an High-tech Zone 唐延南 Road Plaza Crest (two) i will Room 0331, Unit 1, over the years, Xi'an Hao Electrical and Mechanical Services to provide customers with the best quality service, contact: Ms. Wong. Welcome to the new and old customers call, letter, visit the guide, business negotiations. Xi'an Hao Electrical and Mechanical expect to be your long-term partner!