LG Mini Split Installation

Measure the inside of the room using your tape measure to ensure that you have at least 12 inches of space to the right and left of the indoor unit, and at least 4 inches clearance above and about 7.5 feet below the unit. Then measure the location for the outdoor condensing unit and ensure you have clearance of at least 4 inches from the left and back sides of the unit, 28 inches in the front, and 24 inches clearance on the right side of the unit.

Unpack the two sides of the unit from their respective boxes. Remove the wall bracket from the back of the indoor unit and set it to the side. From the back of the indoor unit, remove the screw holding the brace in place over the plastic tubing.

Mark the location for the wall bracket, and then use your drill to screw the wall bracket in place in your chosen location.

Mark the location for the hole you are going to drill through the wall at the bottom right of the indoor unit. You will be able to measure this by deciding where the drainage tubing at the back of the indoor unit will jut out and measuring the hole accordingly. After you've measured, use your 2 and 3/4 inch drill bit to drill a hole through the wall, aiming in a slightly downward direction as you point outward.

Use a pliers to spread the clamp out from the drainage tubing at the back of the indoor unit, and then attach the drainage tubing to either the left or right side drainage tube, according to your specifications.

Feed the communication cable through the wall to the outside, and then thread the indoor side of the cable through the back of the indoor unit and through the door of the unit.

Wrap the cooling lines, the drainage tube and the communication cable together and wind electrical tape around the length of the bundle. Thread the bundle through the wall to the outside, with the drainage tube at the bottom of the bundle.

Hang the indoor unit on the wall mount by guiding the grooves at the back of the unit onto the brackets of the wall mount.

Place the rubber grommets that came with the outdoor unit on the 4 feet of the outdoor unit, and then place the unit on the installation mat in the designated location. Hang the outdoor unit electrical panel on the outside wall using your drill and screws.

Remove the two flare nuts from the two service valves on the outdoor unit. Follow the instructions of your flaring tool manufacturer to flare the copper tubing for your cooling unit, and then connect the indoor and outdoor tube sides together, using a torque wrench to tighten the nuts to the amount detailed in the manual for your particular model.

Remove the electrical connection cover from the outside of the unit and then connect the three low-voltage wires on the left hand side of the outside unit's electrical panel, making sure the disconnect panel is in the off position. Then install the three left-hand wires on the inside unit. Back outside, install the three high-voltage wires on the right side of the unit, and then ground the large green wire to the screw to the right and under the outside unit electrical panel.

Check for leaks in the system by placing refrigerant leak detector around the flare connections, and connect a tank of nitrogen to the service valve on the outdoor unit at a pressure of 150 psi. Monitor the tank to ensure that there is still this much pressure after several minutes. When you've determined that the system does not have any leaks, you're going to purge the nitrogen in the system.

Connect a vacuum pump and micron gauge to the condensing unit of the outdoor unit to evacuate the system, leaving the system at about a 500 micron vacuum for about 30 minutes.

Close the pump valve and look at the micron gauge. The evacuation is done and you can be assured that your system is leak-free if the micron gauge does not go above 1,000 microns after 10 minutes.

Remove the valve caps from the service valves and then use a 4 mm hex wrench to open the service valves, and then replace the valve caps you removed in Step 10.

Turn on the outdoor disconnect electrical panel and then turn on the indoor unit with the unit remote.