As the summer heat starts to kick in, staying cool in your home or office becomes increasingly important. A split air conditioner is one of the most popular and effective ways to keep your space comfortable during the scorching summer months. But isn’t it scary to think about installing an AC by yourself? Don’t worry! In this article, we will guide you on the step-by-step process of installing a split air conditioner so you can keep cool in no time. So, grab your tools and let’s get started!

1. Preparing Your Home for Split Air Conditioner Installation

How to Install Split Air Conditioner: Preparing Your Home for Installation

Before you begin with the installation process of a split air conditioner, it is essential to first prepare your home and set up the necessary materials and tools required to complete the installation. Here are some essential steps to follow:

Step 1: Determine the Appropriate Location for Indoor and Outdoor Units

The first and foremost step towards is to determine the location for installing both indoor and outdoor units. Ideally, the indoor unit should be installed on a wall in the room that is accessible and free of any obstructions. The outdoor unit should be installed outside of your home, preferably in an open space that is easy to access and close to the indoor unit.

Step 2: Collect Necessary Tools and Materials

Before beginning the installation process, make sure that you have all the necessary tools and materials required for the installation process. Some of the essential tools and materials include:

  • Drill machine with appropriate bits
  • Tape measure
  • Screwdrivers
  • Pliers
  • Level
  • Power drill (if needed)
  • Wall mounts for indoor unit
  • Fixing brackets and bolts for outdoor unit

Step 3: Check Electrical Connections and Power Supply

Before proceeding with the installation, make sure to check if the electrical connections and power supply are compatible with your split air conditioner model. You may need to hire a professional electrician to make any necessary changes to the wiring and power supply.

By following these simple steps, you’ll be well prepared to begin installing your split air conditioner. Next in the process is mounting the indoor unit, which we will be discussing in the next section.

2. Step-by-Step Guide to Mounting the Indoor Unit of Your Split Air Conditioner

Mounting the indoor unit of your split air conditioner can be a daunting task, but with these step-by-step instructions, you’ll be able to do it with ease. Follow these guidelines to ensure that your unit is installed correctly and that you can enjoy the benefits of an efficiently cooling space.

Step 1: Choose the Mounting Location

The indoor unit should be installed in a place where it can distribute cool air evenly throughout the space. Also, it should be mounted in a location that won’t obstruct the flow of people moving in and out of the room. A wall that’s near an electrical outlet and that’s strong enough to hold the unit’s weight is an excellent choice.

Step 2: Drill the Holes

Before mounting the unit, drill holes in the wall for the mounting bracket. The holes should be at a diagonal angle and be of the same distance apart as the mounting bracket’s position holes. Make sure that the holes are level, and the bracket is securely installed.

Step 3: Mount the Unit

Align the mounting bracket with the holes you just installed and screw them in. Then, slide the indoor unit onto the bracket and secure it in place. This is also the time to connect the drain hose to the unit, making sure that it will drain the water away from the room’s interior.

Step 4: Make Electrical Connections

The next step is to connect the power cable to the indoor unit, which should be done by an electrician. Use an electrical conduit to route the wires from the power source to the unit if possible.

Step 5: Connect the Pipes

Finally, connect the refrigerant pipe and drainpipe to the indoor unit. To do this, attach the pipes to the designated ports at the back of the unit, making sure to tighten the bolts securely. After the pipes are connected, use an insulation tape to cover the pipe joints and ensure that there’s no air leakage.

By following these step-by-step instructions, you’ll be able to mount the indoor unit of your split air conditioner correctly. Remember always to seek professional assistance if you’re unsure of any step in the installation process. Once the indoor unit is installed, you can move on to installing the outdoor unit.

3. Installing the Outdoor Unit: Tips and Precautions to Take

After successfully mounting the indoor unit, it’s time to install the outdoor unit. The outdoor unit is usually larger and heftier than the indoor unit, and it requires careful handling. In this section, we will discuss some tips and precautions to take when installing the outdoor unit of your split air conditioner.

Tip 1: Choose the Right Location for the Outdoor Unit
The outdoor unit of the split air conditioner is responsible for releasing the heat absorbed by the indoor unit, which means that it needs to be installed in a well-ventilated area. The location must be away from obstructions such as trees, plants, fences, or walls. The ideal place for the outdoor unit is a flat area, which is away from direct sunlight, and not too close to your neighbor’s window or doorway.

Tip 2: Prepare the Foundation for the Outdoor Unit
Before installing the outdoor unit, it’s important to establish a solid foundation. You can create a concrete base slab, metal frame, or rubber pads to support the outdoor unit. The foundation must be leveled to ensure that the outdoor unit doesn’t vibrate or wobble during operation.

Precaution 1: Observe Electrical Safety Protocols
When installing the outdoor unit, make sure to disconnect the power source and switch off the circuit breaker. Wiring the outdoor unit requires knowledge and experience, so it’s recommended to hire a professional electrician to do this step.

Precaution 2: Mind the Refrigerant Leaks
Installing the outdoor unit involves connecting the refrigerant and drainage pipes from the indoor unit to the outdoor unit. Make sure to follow the manufacturer’s instructions carefully, and perform a leakage test before activating the unit. Any refrigerant leaks can be hazardous to your health, so take extra care in handling the refrigerant and pipes.

By observing these tips and precautions, you can ensure that your split air conditioner’s outdoor unit is installed safely and efficiently. In the next section, we will discuss how to wire and connect the indoor and outdoor units.

4. Connecting Your Split Air Conditioner: Wiring and Pipe Work

Connecting your split air conditioner involves two main processes: wiring and pipe work. Proper installation requires accuracy and precision. Here’s what you need to know:


Your air conditioner will typically come with an indoor unit and an outdoor unit. You need to connect these units using electrical wires. The wiring is essential for powering up the air conditioner and allows the indoor and outdoor units to communicate with each other. Before you start wiring, make sure that the electricity supply to the air conditioner is turned off.

Here are the steps involved in the wiring process:

Step 1: Locate the power supply cables that run from the outdoor unit to the indoor unit.
Step 2: Connect the power supply cables to the corresponding terminals on the indoor unit.
Step 3: Connect the thermostat cable to the indoor unit. The thermostat cable is responsible for controlling the temperature inside your home.
Step 4: Connect the power supply cables to the outdoor unit. Make sure to match each cable with its corresponding terminal.

Pipe Work

After completing the wiring process, it is time to connect the pipes. These pipes transport refrigerant between the indoor and outdoor units. Here is how to connect the pipes:

Step 1: Locate the refrigerant piping kit.
Step 2: Cut the required lengths of copper piping using a pipe cutter.
Step 3: Attach the pipe flare nuts to the ends of the copper piping.
Step 4: Connect the refrigerant pipes to the indoor unit and outdoor unit.
Step 5: Tighten all flare nuts using a torque wrench.

Ensure that you don’t bend or twist the copper pipes while connecting them to the units. This may cause kinks in the pipes which will lead to reduced refrigerant flow and reduced air conditioning performance.

By following these steps, you can connect your split air conditioner efficiently. However, to ensure optimum performance, it is always recommended to get it done by a professional.

5. Testing and Troubleshooting Your Split Air Conditioner after Installation

After installing your split air conditioner, it’s important to test it to ensure that everything is working as it should. In this section, we’ll discuss how to test and troubleshoot your split air conditioner after installation.

Testing Your Split Air Conditioner

To test your split air conditioner after installation, turn on the power and set the temperature to the desired level. If the unit does not turn on or is not blowing cold air, check the following:

– Check the power supply: Ensure that the unit is properly plugged in and that the circuit breaker has not tripped.

– Check the filters: Dirty filters can restrict airflow and affect the performance of your split air conditioner. Clean or replace the filters if necessary.

– Check the refrigerant levels: Low refrigerant levels can cause your unit to not blow cold air. Consult a professional if needed.

– Check the thermostat: Make sure the thermostat is set to the correct temperature and is functioning correctly.

Troubleshooting Your Split Air Conditioner

If your split air conditioner is not working properly, try troubleshooting using the following steps:

– Check the error code: Split air conditioners usually have an error code system that can help diagnose problems. Check the manual for your specific model to understand what the error code means and how to fix it.

– Check for leaks: If there is a leak in your system, the refrigerant levels will be low and your unit will not blow cold air. Look for signs of leaks and consult a professional if needed.

– Call a professional: If you are unable to diagnose or fix the problem on your own, call a professional. Attempting to fix the problem yourself could cause further damage or even injury.

Following the above steps can help ensure that your split air conditioner is functioning properly and efficiently. Testing and troubleshooting your unit after installation can save you time and money in the long run.

People Also Ask

What tools do I need to install a split air conditioner?

To install a split air conditioner, you’ll need a power drill, a mounting bracket, a level, a stud finder, a hole saw, a refrigerant line wrench, a vacuum pump, and a set of manifold gauges.

Do I need a professional to install a split air conditioner?

While it’s possible to install a split air conditioner yourself, it’s often recommended that you hire a professional to ensure that the installation is done correctly and safely.

What are the steps to install a split air conditioner?

The steps to install a split air conditioner include selecting the location for the indoor and outdoor units, mounting the indoor unit, drilling holes for the refrigerant lines and electrical wiring, connecting the refrigerant lines and electrical wiring, charging the system with refrigerant, and testing the system.

How long does it take to install a split air conditioner?

The installation process for a split air conditioner can take anywhere from 4-8 hours depending on the complexity of the installation and the size of the system.

Can I install a split air conditioner in any room?

While you can technically install a split air conditioner in any room, it’s important to ensure that the room has adequate ventilation and can support the weight of the indoor and outdoor units.


Installing a split air conditioner can be a complex process, but with the right tools and knowledge, it’s possible to do it safely and effectively. It’s important to carefully plan out the installation, follow all safety guidelines, and consider hiring a professional if you’re unsure about any aspect of the installation process.