Step-By-Step Installation Guide for Wall-Mounted Split AC

Split wall-mounted AC systems are affordable, energy-efficient, and easy-to-install options that you can use to keep your room cool in the summer. These AC units are ductless which means they are much easier and quicker to install and you can even do it yourself if you have the right tools.

You just have to install the cooling unit inside and then place the condenser and compressor unit outside. After that, you run the piping and power cables to connect these two units with each other and you are good to go.

If you are not sure about the installation of a wall-mounted split ac, then keep on reading. In this article, we are going to take you through this process step-by-step. With this guide by your side, you will be able to install this system in very little time and with very few risks. So stay with us till the end.

Step 1: Select the Indoor Installation Area

You need to make sure the spot you select is away from direct sunlight and other heat sources. Pick a place from where you can easily drill a hole to connect the pipes from the indoor unit to the outdoor unit.

The acceptable height of a wall-mounted ac unit is about 2.1 m above the ground. Also, there should be about 6-12 inches of space on each side of the unit for the best performance.     

Step 2: Install the Mounting Plate

In this step, you hold the mounting plate on the wall and use a level to make sure the plate is even in horizontal as well as vertical position. After that use a pencil to mark the place where you will drill the holes for the screws.

Now you can place the plate on the wall, insert the plastic anchors into the holes that you have just drilled, and secure the plate with the screws.

Step 3: Drill an Outlet Hole

After that select a place to drill the outlet hole from where you will feed the pipes outside. Make sure there are no electrical wires or pipes either inside or behind the wall before drilling this hole.

After that use a drill or a keyhole saw to create a 7-8 cm hole for the pipes and wires. Make sure the opening slightly slopes downward since it facilitates adequate drainage.

Step 4: Check Indoor Electrical Connections

Now you need to open the front panel of your indoor unit, remove the cover, and make sure the wires are connected to the screw terminals in the right sequence. This will help you ensure all the communication wires are secure in their place.

Step 5: Connect Pipes and Cables to the Indoor Unit

Now run all the cables and pipes through the hole you just made and secure copper pipes, cables, and drainage pipes using tape. It is better to place the drainage pipe at the bottom since it ensures free water flow.

There is no need for you to add extra insulation since each line is already insulated upon arrival. Just make sure to minimize the bending of the cables and pipes since it can reduce the cooling efficiency and can lead to various systematic issues.

Step 6: Mount the Indoor Unit

Now lift the indoor unit up preferably with the help of another individual and align the connection on the back of the unit with the ones on the mounting plate. Press firmly to make a secure connection. Always remember to tilt the unit 2 to 3 degrees backward to ensure smooth water flow out of the drain pipe.

Step 7: Choose a Suitable Place for The Outdoor Unit

Find a suitable place for the outdoor unit that is away from direct sunlight, heat, and dust from traffic and other factors. Locate the hole that you drilled earlier and find a suitable position for the outdoor unit within 50 feet. This will ensure the piping and cables are attached easily. It is also a good idea to place the external unit at least 10 feet away from the radio or TV antenna.

Step 8: Lay a Concrete Pad or Fix the Brackets on the Exterior Wall

Now you need to decide whether to place the unit on your wall or on a concrete pad outside your house. If you choose to go with the brackets, then drill the holes after ensuring the bracket is horizontally aligned.

If you prefer a concrete pad, then make sure wherever you place it, it is flat and even. Avoid placing the unit on the grass since it can shift around easily owing to its large size and weight.

Step 9: Mount the Outdoor Unit

While mounting on the wall, make sure the air conditioner and the screw holes of the bracket coincide. This unit can be really heavy and that is why it is highly advised that you lift it up with the help of a friend or someone from your family.

In order to secure the unit on concrete, lay a rubber cushion first and then place the unit to minimize vibrations. Use anchor bolts to secure the unit with the concrete pad to give it a strong foundation.

Step 10: Connect the wires and piping

In this last step, you open the cover of the electrical ports and make wire connections by referring to the connection diagram of the ac unit. In order to connect copper pipes, use flare nuts. This will attach the indoor unit to the outdoor unit.

Now you just need to connect the power supply to the designated outlet and you are almost done.

Wrapping it Up

After completing these steps, bleed the air from the refrigerant circuit, fix the piping with clamps, and seal up the hole in the wall with polyurethane foam and you are good to go. If you follow these steps completely, we are certain you will have no trouble installing your AC unit yourself.

If, however, you are not certain how to do it right, it is always a great idea to seek help from a professional. Read this detailed guide several times carefully before doing the installation so that you feel confident and not at all stressed during the process.

Visit York MEA to explore our wide array of wall-mounted split AC solutions for commercial and residential spaces.