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What Are The Steps In Mini Split AC Installation?

In the article “What Are The steps in mini split ac installation?” from TES Heating & Cooling, you will find a comprehensive guide outlining the process of installing a mini split air conditioning system. This well-structured manual is designed to walk you through each critical step, ensuring that you grasp the intricacies involved in securely and efficiently setting up your unit. From the initial site assessment and system selection to the precise tasks of mounting the indoor and outdoor units, as well as the crucial connections of refrigerant lines and electrical components, this article serves as a definitive resource. It is tailored to provide both residential and commercial clients with the necessary knowledge and confidence to undertake or oversee a mini split AC installation, all while emphasizing TES Heating & Cooling’s dedication to excellence in service and customer satisfaction. Have you ever wondered how to tackle the installation of a mini split air conditioning system yourself? The task might seem complicated initially, but with the appropriate guidance and methodical approach, you can install a mini split AC system efficiently and effectively.

With the expertise offered by TES Heating & Cooling, your reliable HVAC company in Los Angeles, this guide aims to provide you detailed steps for the installation process. We specialize in HVAC systems, including mini splits, and customize our installations to meet your specific needs, whether for residential or commercial properties. Visit www.tes-hvac.com or contact us at info@tes-hvac.com for any professional assistance or further guidance.

What Are The Steps In Mini Split AC Installation?

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Assess Your Needs

Before starting any installation process, it’s critical to evaluate your specific requirements. This includes determining the appropriate size of the unit, understanding the layout of your space, and assessing where to position the indoor and outdoor units.

  • Space Analysis: Measure the square footage of the area you wish to cool or heat. Mini split AC systems vary in capacity, typically measured in BTUs (British Thermal Units). Evaluating the size of the space will help in selecting a system that provides optimal performance.
  • Energy Efficiency: Consider the energy efficiency of the system you choose. Units with a higher SEER (Seasonal Energy Efficiency Ratio) rating can save on energy consumption, lowering your utility bills over time.

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Gather Necessary Tools and Materials

For a successful installation, you will need a range of tools and materials. Having everything ready beforehand can streamline the process and mitigate delays.

Tools Required Materials Needed
Drill Mini Split AC Unit
Hole Saw Mounting Brackets
Level Anchors and Bolts
Pipe Wrenches Refrigerant Lines
Screwdrivers Electrical Wiring
Wrench Set PVC Condensate Hose
Measuring Tape Insulation Tape

Selecting the Installation Location

Choosing the right location for both indoor and outdoor units is paramount. This step involves considering various factors such as accessibility, clearance, and exposure to elements.

  • Indoor Unit: Ensure that the unit is centrally located within the room for uniform air distribution. Avoid placing it near heat sources, direct sunlight, or areas prone to moisture.
  • Outdoor Unit: Place the unit in an area with good ventilation. It should be on a flat surface, away from obstructions and shading elements. Maintain sufficient clearance around the unit for proper airflow and maintenance.

Installing the Indoor Unit

  1. Mount the Bracket: Use the level to ensure the mounting bracket is horizontal. Secure the bracket to the wall using appropriate anchors and bolts.
  2. Prepare the Hole: Drill a hole through the wall for the refrigerant lines, condensate hose, and electrical wiring. Ensure the hole is sloped downward to facilitate drainage.
  3. Feed the Lines: Carefully thread the refrigerant lines, condensate hose, and electrical wiring through the hole to the outside.
  4. Secure the Unit: Mount the indoor unit on the bracket, ensuring it is securely fastened.

Installing the Outdoor Unit

  1. Position the Unit: Place the outdoor unit on a stable surface, such as a concrete pad or wall bracket, ensuring it is level.
  2. Connections: Connect the refrigerant lines and electrical wiring to the outdoor unit. Properly tighten the connections to prevent leaks.
  3. Drainage: Attach the condensate hose to ensure proper drainage.

Electrical Connections

Safety is paramount when dealing with electrical components. If you are not comfortable handling electrical wiring, it’s best to hire a professional electrician.

  1. Shut Off Power: Turn off the power supply to avoid electrical hazards.
  2. Wiring: Follow the manufacturer’s manual to connect the indoor unit, outdoor unit, and thermostat, ensuring all connections are secure and properly insulated.

Vacuum the Lines and Charge the System

  1. Evacuate Air: Use a vacuum pump to evacuate any air and moisture from the refrigerant lines, which can affect the system’s efficiency.
  2. Charge Method: Add refrigerant as per the manufacturer’s specifications to ensure the system runs efficiently.

Testing the System

  1. Power On: Turn on the power supply and start the unit.
  2. Performance Check: Verify that the unit operates correctly, providing the desired cooling or heating effect.
  3. Adjustments: Make any necessary adjustments to the settings or unit positions for optimized performance.

Final Steps: Covers and Finishing Touches

  1. Covering Exposed Lines: Use insulation tape to cover any exposed refrigerant lines. This helps in preventing energy loss and safeguarding the lines.
  2. Mount Covers: Attach the covers to protect the connections and lines from external elements.
  3. Clean Up: Ensure the work area is clean and free from any installation debris.

Maintenance and Troubleshooting

Regular maintenance is crucial for the longevity and performance of your mini split AC system. Schedule regular cleaning of filters, checking refrigerant levels, and inspecting electrical connections.

  • Routine Checks: Regularly clean or replace filters, inspect outdoor unit fins, and check for refrigerant leaks.
  • Professional Services: For complex issues or annual maintenance, it’s advisable to seek professional services like those offered by TES Heating & Cooling.


Installing a mini split AC system involves detailed steps and cautious handling, but with this guide, you can efficiently accomplish the task. However, if any part of the process seems intimidating or if you prefer professional expertise, TES Heating & Cooling in Los Angeles is here to assist you. Our team specializes in customized HVAC solutions to ensure comfort throughout the year. Contact us at info@tes-hvac.com or call 424-400-6692 for expert advice and installation services.

By following these meticulous steps, you can enjoy the benefits of a mini split air conditioning system, providing efficient cooling or heating for your space.

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