When mounting a new air conditioning unit on a property, then the installer normally attributed to indoor and outdoor units necessary location. The different types and styles that adhere to the wall or ceiling.An electrician install a power that feeds the evaporator, either inside or outside, depending on the model of the capacitor. An interconnect cable is then installed between the two units within the unit allows the outdoor unit control functions.Two copper pipes are installed between the two units. Welding is used for welding pipe, not plumbing solder joints. During the process of welding the pipe is filled with oxygen free nitrogen ensure that no plaque on the pipe by welding. If the scale can rupture and block the tubes or permanently damage compressor.Final tubing connections in the indoor and outdoor units are made by connecting a copper glow, similar to those found in vehicle break pipes. The outbreak of connection can withstand high pressure and if not properly mounted leak.The lines are loaded with nitrogen under pressure of free oxygen. This pressure is recorded and decreases with time if you have a leak unit.From experience suggest that nitrogen free oxygen remains in the pipes for at least 24 hours. Any change in this period can only mean one thing leak.When pipes do not leak and has been shown that nitrogen is removed. The tubes are connected to a vacuum pump that removes oxygen and non-condensable gases and water vapor from the last stage pipes.The the refrigerant in the pipes and then the commission system.So, an air conditioning can be installed in days? Well, yes can.The the biggest problem with the installation of a day is the test time remaining. Some very small leaks are not detected unless the nitrogen is paid at least 24 hours. If a leak, the coolant leak and eventually the unit will be sufficient charge.Its efficiency degrades slowly stops working. As the coolant also contains lubricant for the compressor, it is only a matter of time until the big compressor occurs. If this can be attributed to the improper installation of any manufacturer warranty. Some low-pressure units detect and shut down the compressor before it fails, but the cheaper models this.Our no opinion to the test and the license for at least 24 hours with LG Air Conditioning units that have proven their reliability.