Normal HVAC Installation:
Usually, a technician will solder together copper tubing to create a sealed environment for the refrigerant chemicals to circulate. Then, they add nitrogen gas under high pressure to test for leaks. Next, they use a vacuum pump to evacuate all gasses from inside. Only then will they release the refrigerant that will allow the system to function, using gauges to make sure the volume and pressure are correct.
The Blueridge Do-It-Yourself system uses a different approach to get the same result. You get two separate units - the inside air handler and the outside condenser. The condenser already contains the correct amount of refrigerant. The copper lines included with your Blueridge DIY system, are already under vacuum. They have quick-connect fittings that maintain a vacuum until you’re ready to connect. After you’ve installed the indoor and outdoor units, you screw together the quick-connect fittings, then open the valves to release the refrigerant. It’s that easy.