A Guide for Split AC Unit Installation and Maintenance

April 23, 2024
Last Updated:November 13, 2025
Home Maintenance Tips
A Guide for Split AC Unit Installation and Maintenance

Split AC units are affordable, energy-efficient, and easy-to-install AC options that you can use to keep your home cool during summer. A split AC system has two main parts: an indoor unit that cools the air, and an outdoor unit that releases heat.  Getting it installed right is key. Imagine, if not set up correctly, it won’t cool or heat your home effectively, costing you comfort and money. Although it’s advised that you hire a professional AC service in Noida to install your split AC system, if you don’t want to, maybe due to the high split ac unit installation cost and you have some experience with electrical and piping work, you can install the system on your own. 

This guide covers everything you need to know. We’ll start by showing you where to place each unit and what tools you’ll need. Then, we’ll guide you through the installation process step by step. Plus, we’ll share tips on testing and maintenance. Stick with us, and you’ll soon enjoy the perfect temperature in your home!

Pre-Installation Preparation For Split AC

Before diving into split ac unit installation, it’s crucial to be properly prepared. Here are some ways for you to ensure you’re fully prepared below:

Selecting the location:

When thinking of split unit air conditioner installation, the first thing to consider is where you will place it. Scout the ideal locations for both the indoor and outdoor units. If you are planning to install the unit in an already existing building, make sure that there is adequate space for the indoor unit as well as outdoor units. If you are installing in a new building, for example, an apartment complex, make sure the unit is not too close to other structures or walls so that airflow is not obstructed. 

Consider the strength of the wall:

Because you install your split AC, you need to be sure that the wall on which the indoor unit will be installed is strong enough to support its weight. The weight of most units varies by manufacturer and model but generally ranges from 35-50kg. Make sure that the wall can handle this weight before drilling any holes. This is very crucial so as to avoid accidents and also to save you from additional split unit installation cost if it’s not done right the first time.

Gathering the necessary tools:

Before installing your split AC, make sure to grab all the tools you’ll need. Get a drill, mounting brackets, screws, and a level. These tools help you set up the AC properly. The drill makes holes, brackets hold the unit in place, screws secure parts together, and the level ensures that your installation is straight and flat. Having these tools on the ready makes installation smoother.

 

Split AC Unit Installation For Indoor Unit :

The split AC indoor unit which is also called the evaporative unit, contains the circulation fan, expansion valve and the evaporator coil. The steps below will guide you on how to install your indoor unit:

Mount the Unit on a Wall that is not Obstructed:

Before beginning the installation process, start by picking a clear spot on an inside wall where you can mount the indoor unit. This should be a spot that allows you to make a hole through the wall for the pipes that would connect the indoor and outdoor units. Find a place away from direct sunlight and heat sources, as this keeps your AC from overheating. Make sure the unit sits 7 feet (2.1 m) above the ground, with 6–12 inches (15–30 cm) of space around it for airflow. Install it in a location with stud on the wall to ensure it’s strong enough to hold the AC weight. Keep it at least 3.3 feet (1.0 m) away from antennas, power lines, and other electronic gear to avoid interference. Lastly, steer clear of places with gas leaks, oil mist, or sulfur.

Install the Mounting Brackets:

Place the mounting brackets against the wall where you want to install the indoor unit. Using a level, ensure it is horizontally and vertically balanced and straight. Mark where the screws will go with a pencil, then take off the brackets. Drill holes where you marked. Put the brackets back and line it up with the holes. Put plastic anchors in the holes and screw the brackets to the wall.

Hole for Outlet:

Next, select a point on the middle of the mounting bracket and use a drill or a keyhole saw, make a 7-8cm outlet hole from where you will feed the pipes to the outdoor unit. But, double-check that there are no electrical wires or drainage pipes either inside or behind the wall before drilling this hole. Make sure the opening slopes slightly downward to facilitate adequate drainage.

Verify Indoor Electrical Connections:

Open the front panel of your indoor unit, take off the cover, and make sure the wires are connected to the right screw terminals in the right sequence. This ensures that all the communication wires are secure and in place.

Install Drain Pipes and Electrical Wiring:

Once you’ve drilled the hole, tread the pipes and cables through the hole you made, being careful not to bend them too much. Use tape to secure the copper pipes, cables, and drainage pipes in place. Remember, it’s best to position the drainage pipe at the bottom to ensure the water flows freely. Also, you don’t need to worry about adding extra insulation because each line already comes insulated when you receive it. Just focus on keeping the cables and pipes as straight as possible to maintain the cooling efficiency and prevent any potential issues down the line.

Mount the Indoor Unit:

After this, lift the indoor unit up preferably with the help of another person, align the connection on the back of the unit with the ones on the mounting plate. Press firmly to ensure it’s securely attached. Don’t forget to tilt the unit slightly backward, about 2 to 3 degrees, to help water flow smoothly out of the drain pipe.

 

Outdoor Unit Installation For Split AC :

The outdoor ac unit containing the compressor, condenser and the fan is usually installed on the exterior of the building. Follow the steps below to successfully install your outdoor unit:

Choosing the Right Outdoor Space:

Look for the hole you made earlier when you were installing the indoor unit and place the out exterior unit around 50 feets (15m) from it. This is to make it easier for the pipes and cables to be attached. If possible, position your outdoor unit in a shady spot away from direct sunlight, heat, and dust from traffic and other factors. It’s also advisable to place the unit 3m away from TV or radio antennas.

Choose your Installation Base:

Depending on your needs, you can mount the unit on the wall or on a concrete pad. You can also go with the wall, just make sure the bracket is horizontally aligned and drill holes on the wall. But, if you prefer a concrete pad, then ensure that wherever you place it, it’s a flat and even surface. Avoid placing the unit on grass since it can shift around easily when it’s vibrating owing to its large size and weight.

Mount the Outdoor Unit:

Since this unit is extremely heavy, lift it with the help of another person, then place it on the concrete pad. But before doing that, place a rubber cushion to minimize vibration. Using anchor bolts, secure the unit to the concrete pad for a strong connection.

Connecting and Testing the Unit 

When you’re done with the split unit air conditioner installation, ensure all the connections are rightly secure and then test the system as mentioned below:

Connect the indoor and outdoor units to the power source:

Open the cover of the electrical ports and make sure all the wires are securely connected by referring to the connection diagram on the manual of the split AC unit. Using flare nuts, secure the copper pipes from the indoor unit and the outdoor unit. Connect the power cable that runs from the indoor unit to the outdoor unit too. Then, connect the power source to a designated outlet.

Power on the system:

To power on your split AC system after installation, find the power switch,  which is usually near the indoor unit. Flip the switch to “ON.” Using the remote control, press the “Power” button to turn on the AC. Select your desired mode (cooling, heating, etc.) and adjust the temperature using the arrow buttons. Wait a few moments for the system to pick up, then check if it’s producing cool air. 

Tips for Split AC Maintenance and Care

Let’s look at a few DIY maintenance tips you can follow to take care of your split AC system:

Change the filters regularly:

Clean or replace your air filters every once a month to keep the air clean and the AC working efficiently. Clogged and dusty filters can make the AC work harder to maintain the required temperature, leading to higher energy bills.

Use the self-cleaning function:

Some split AC units have a self-cleaning feature. Activate it to remove dust, mold, and bacteria from the unit, to ensure better air quality and prolong its lifespan.

Get it Service Regularly:

Schedule professional maintenance at least once a year. AC service in Noida technicians will inspect and clean the unit thoroughly, fix any issues, and ensure it runs smoothly, reducing the risk of breakdowns and extending its lifespan.

Conclusion

Although we’ve covered the essential steps for installing a split AC system to ensure optimal performance and comfort. However, professional installation is still vital to avoid costly mistakes and ensure safety. That’s why I recommend Keyvendors as the best split AC service. With their expertise and experience, they’ll handle the installation with precision and care, leaving you with a perfectly functioning AC system. Don’t take risks with DIY installation—trust the professionals at Keyvendors to get the job done right the first time.

About the Author

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keyvendors Team

Content Team at Keyvendors

Expert content team with a passion for creating engaging and informative articles on technology and business solutions.