Nitrogen packing: This is the pressure test must be carried out after soldering copper pipe, Ningshan Daikin central air-conditioning, to the copper tube filled with a predetermined pressure nitrogen packing, general stress test time was 24 hours. To note: use R410 refrigerant, the need to maintain the tube pressure of 40 kg, Daikin central air-conditioning offer, R22 refrigerant pipe is necessary 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 the test, you should check whether the refrigerant pipe welding problems. In order to ensure the installation of construction put in place, Daikin central air-conditioning manufacturers, all gauge not to dismantle the conventional 24 hours after packing, keeping out of the machine before the live test to only demolish, (mistakenly loss of refrigerant system to prevent other decoration and construction time) to fully ensure the safe operation of the refrigerant system. Indoor machine room ceiling height, according to the design height hanging good coordination, not close to the indoor unit. If the condensate drain pipe fitted with a trap, the trap must be below the ceiling. Daikin central air conditioning installation, Xi'an Hao Electrical and Mechanical, Ningshan Daikin central air conditioning 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) adhere to the "people-oriented" business philosophy, with a professional staff, and strive to provide the best products and services to contribute to society, and Welcome to the new and old customers throughout the visit, sincere cooperation for a better future. Xi'an Hao Electrical and Mechanical Services - your reliable friend, Company Address: Room 0331, Xi'an High-tech Zone 唐延南 Road Plaza Crest (two) i will, Building 3, Unit 1, Contact: Ms. Wong.