Installing a ductless mini split air conditioner is different from installing a window air conditioner. Window air conditioners do not require an outdoor unit, but ductless splits do.

There are 8 key steps to install a ductless mini split air conditioner. Here is a brief guide to help you understand the installation process:

Select the Right Location

You need to consider the installation locations of both the indoor and outdoor units.

For a mini split indoor unit, choose a location where nothing blocks the cold air, so the air conditioner can reach most areas of the home. If your home is not very large, you don't need to consider specifically where to install it, as most air conditioners under 10000 BTU can cool your home.

For the outdoor unit, ensure it is in a well-ventilated area, on a flat surface away from direct sunlight and debris, with at least 12 inches of space around it for airflow and maintenance.

Install the Mounting Brackets

Make sure the bracket is stable and level before mounting the unit. Then, hold the bracket against the wall while using a level to ensure it is straight.

Next, mark the drill points, and drill pilot holes (using wall anchors for drywall or a hammer drill for masonry).

Lastly, secure the bracket with screws. For the outdoor unit, it should be placed on a flat, stable surface such as a concrete pad or a wall-mounted bracket.

Drill a Hole for the Line Set

To drill a hole for the line set of a ductless mini-split air conditioner, determine the best exit point behind the indoor unit, ensuring it aligns with the outdoor unit's location.

Then, use a hammer drill with a hole saw attachment appropriate for your wall material. The drill should be around 2.5 to 3 inches in diameter to accommodate all necessary cables and pipes.

Connect the Electrical and Line Sets

Start by threading the refrigerant lines, the power cable, and the drainage tube through the hole previously drilled in the wall to the outdoor unit.

Next, connect the refrigerant lines between the indoor and outdoor units. Use torque wrenches to tighten the connections according to the manufacturer’s specified torque settings.

Finally, connect the electrical wires from the indoor unit to the outdoor unit, matching the color-coded wires and ensuring each is securely attached to the correct terminal.

Install the Drainage Hose

To install the drainage hose, securely connect one end of the hose to the drainage outlet on the indoor unit, and ensure a tight and leak-free fit.

Then, route the hose towards the nearest drainage point or outside, and maintain a downward slope without any kinks or bends to facilitate unobstructed water flow.

Finally, secure the hose with clamps at regular intervals along its path to keep it firmly in place.

Vacuum the Refrigerant Lines

Firstly, you need to connect a vacuum pump to the service port using appropriate gauges and hoses. Make sure all connections are tight to prevent any leaks.

Secondly, activate the vacuum pump and allow it to run until it reaches a vacuum level of at least 500 microns. This process usually takes between 15 to 30 minutes to remove all moisture and air from the lines.

Lastly, after the vacuuming is complete, verify the vacuum with a micron gauge to ensure the system is ready for the refrigerant charge.

Test the Unit

Congratulations! You have done a great job and passed the most difficult steps. It’s close to enjoying the great summer with your lovely air conditioner! Keep moving!

Now you need to pick up your remote control and test if all the functions of your mini split air conditioner are working properly.

And inspect if there are any noises or vibrations, which could indicate mechanical issues, or if there are any leaks in the refrigerant lines.

Finally, confirm the room temperature reaches the desired temperature settings.

Seal the Hole

Only one step left!

Applying a weather-resistant sealant or expanding foam around the pipes and cables where they exit the wall can effectively seal the hole drilled for the line set. And you should note that the sealant can fully fill the space.

Finally, you just need to wait a while for the sealant to fully cure, and then everything is done.

5 Safety Tips for Split Air Conditioner Installation

The steps to install a split air conditioner are not complicated, right? Even so, as an air conditioner manufacturer aiming for better life, Della hopes that every customer puts their personal safety be the priority and have a comfortable summer. These 5 safety tips you can not miss.

Don’t Turn on any Power

Find the circuit breaker box that controls the electricity supply in your home or building. This is usually located in a basement, garage, or utility room.

If unsure, you might consider turning off the main power breaker to ensure no electrical supply is active in the installation area.

Do not Use Inappropriate Tools

Equip yourself with the correct tools we mentioned before, including a torque wrench, vacuum pump, gauge set, and a proper drill for creating holes. These tools ensure precision and reduce the risk of damage or accidents.

In addition, don't forget the leak detector, multimeter, and PPE (Personal Protective Equipment). These tools are used to detect refrigerant leaks, check electrical connections, and protect against potential hazards.

Do not Install on an Unstable Wall

Verify that the wall is sturdy enough to support the weight of the indoor unit. Walls made of brick, concrete, or solid wood are typically good choices. For drywall or plaster, make sure to locate the studs for secure anchoring.

Also, use a level to ensure that the area where the mini split will be mounted on is even and flat.

Never Handle Refrigerant Carelessly

Ensure that anyone handling refrigerants is properly trained or has knowledge about it. If you need a professor for help, he should be certified according to local and international standards, such as the EPA 608 certification in the United States.

Use refrigerant-specific tools like gauges, hoses, and recovery units that are designed for the refrigerant used in your mini-split system. Following these guidelines helps prevent leaks and ensures safe handling.

Do not Allow Leaks or Faults

Make sure to invest in high-quality AC unit parts, such as durable mounting brackets, insulated copper tubing, and reliable electrical components. High quality mini split air conditioners are less likely to fail and can better withstand the demands of the system.

When conducting leak testing, use a proper leak detector or a soapy water solution to test for leaks. Also, ensure that all electrical connections are tight and secure.

DIY Installation or a Professional?

Having read this far, we are sure you have some idea of how to install a mini-split air conditioner. From there, you can make a decision about whether to do it yourself or hire a professional.

If you have strong technical skills, particularly in HVAC and electrical systems, and feel comfortable following our detailed installation guides and safety tips. DIY approach could lead to substantial savings on high labor costs.

On the other hand, hiring a professional is also a good choice. They ensure the entire installation is efficient, safe, and compliant with local building codes.

In a word, your decision should be based on your level of expertise, the complexity of the project, cost implications, legal requirements, and most importantly, your safety.

If you are unsure, it is advisable to lean towards a professional installation to secure peace of mind and ensure a reliable setup of your mini-split air conditioner system.

Additionally, you can also try to learn about other types of air conditioners, as each type of AC has its own advantages and disadvantages. Perhaps other air conditioners will better meet your price and installation needs.

In Conclusion

Della hopes this installation guide for mini split air conditioners can help you have a more comfortable home and enjoy this hot summer. Della is dedicated to providing air conditioners with better features and designs to offer you a better life.

Feel free to check our air conditioning products and ask any questions you are interested in.

FAQ

How Far Should the Mini-Split Air Conditioner Be from the Condenser?

The optimal distance between the mini split indoor unit and its outdoor condenser varies, but generally, it's advisable to keep them as close as possible to enhance efficiency. Della advises a maximum distance of about 50 to 150 feet. Always consult your mini split system’s customer service for precise guidelines to avoid efficiency losses and potential refrigerant issues.

How Much Does the Mini Split AC Installation Cost?

The cost of installing a mini split air conditioning varies widely from the type of system (single-zone vs. multi-zone) and capacity (measured in BTUs) to the complexity of the installation.

Generally, for a basic single-zone mini split, installation costs can range from $300 to $1,500, whereas more complex multi-zone mini splits can cost between $2,000 or more. The price differences largely depend on the number of mini-split indoor units and the length of mini-split line sets required for setup.

Is It Necessary to Drill Holes in the Wall to Install a Mini-Split Heat Pump?

Yes, drilling holes in the wall is a necessary part of installing a mini-split heat pump. This is required to connect the indoor and outdoor units through mini-split line sets, electrical cables, and drainage tubing. Typically, a single hole of about 2 to 3 inches in diameter is sufficient, drilled through an exterior wall where the indoor unit is mounted.

What are the Advantages of a Mini Split Air Conditioner?

Because the mini split air conditioner offers versatility and economy. It meets the modern family's need for a comfortable life. For example, it can cool and heat homes with great precision, and provide a quiet life. In terms of installation, it doesn't need complicated duct work and everybody can handle it easily.

Is there the best temperature for my mini split air conditioner to keep at?

Actually, there is no fixed best temperature. However, Della recommends setting the temperature to either 26 degrees Celsius or 28 degrees Celsius. The 26 degrees strike a balance between comfort and efficiency, while the 28 degrees can help you save energy further and extend your split AC life.