Mini-split systems are becoming increasingly popular due to their efficiency, flexibility, and relatively easy installation. The equipment consists of outdoor and indoor units, providing individual air conditioning for each room. It takes up little space and can be used for cooling and heating. As a result, more and more consumers consider mini-split systems an ideal solution for homes, offices, and other premises. However, these systems will only be effective and safe if key aspects of installation are considered.

Where is it appropriate to install mini-split systems?

This equipment is ideal for both residential and non-residential premises, regardless of size, such as:

  • Offices and commercial premises
  • Hotels and motels
  • Shops and restaurants
  • Garages and workshops
  • Old houses without air ducts
  • Laboratories and medical facilities

Choosing the right size system, proper installation location, and appropriate power level of the equipment can help minimize the cost of maintaining the desired temperature in the premises without significantly interfering with the building structure.

Five main advantages of mini-split systems

  1. Energy efficiency: Manufacturers use inverter compressors that adjust the power output according to the need.
  2. Flexibility: The units allow you to cool or heat individual rooms independently of each other.
  3. Easy to install: Compared to traditional air conditioning systems, mini-splits do not require large ducts for air ducts.
  4. Quiet operation: Indoor units operate almost silently, making them comfortable for occupants.
  5. Aesthetic appearance: Indoor units look attractive and do not spoil the interior.

How can I install a mini-split system myself?

Ductless systems are easier to install than those requiring complex air ducts. Therefore, installing a mini-split air conditioner on your own may seem rational at first glance, as there is no need to destroy walls or build ducts. However, there are many nuances to consider when installing mini-split systems.

At least one of the units is mounted outside the room, and one or more units are installed inside. These elements are interconnected by a refrigerant pipeline and an electric cable, which require holes to be made in the wall.

It is important to fix all the units properly using brackets. A crookedly installed air conditioner not only looks unaesthetic but also interferes with the normal drainage of condensation. Therefore, after the first unsuccessful installation attempts, you might realize how difficult it is to install mini-split systems without experience and the necessary tools.

How to prepare for installation: Things to consider

Installing climate control equipment requires careful preparation. Before installing mini-split air conditioners, consider the following:

Place of installation

Indoor unit: Choose a location that allows at least 15 cm (0.5 ft) of space on the sides and top for air circulation. The recommended installation height is 2–2.5 m (7–8 ft) from the floor. Avoid areas with direct sunlight and heat sources.

Outdoor unit: Place it on a platform or secure it with brackets in a well-ventilated area. Ensure easy access for maintenance and adhere to technological tolerances. The minimum distance between the outdoor unit and the wall should be at least 30 cm (1 ft) for proper ventilation.

System capacity

When selecting a split system for your facility, choose a ductless air conditioner with the optimal capacity. This could be an air conditioner for one room or a complex system with several indoor units and one outdoor unit.

Proper sizing: Bigger does not always mean better. An overly powerful system will operate in short cycles, leading to insufficient condensation and higher electricity bills. Conversely, low-powered equipment will not effectively cool or heat the air. Proper sizing ensures efficient and effective climate control.

Power supply requirements

Ensure that the electrical wiring meets the requirements of the system. Use a separate circuit breaker for protection and provide a good ground connection for the equipment.

Step-by-step instructions for installing ductless mini-split systems

To install a mini-split air conditioner, you will need a drill, a puncher, a level, a torque wrench, a pressure gauge, and a vacuum pump. In complicated cases, this list may be longer. Materials needed include copper pipes for Freon, heat-insulating materials, power cables, and drainage pipes.

The algorithm of actions is as follows:

Step 1. Mounting the indoor unit

  • Use a mounting plate or studs to fix the unit to the wall. Consider the weight of the equipment. You need to know how hard it is to install a mini-split system without an assistant and be ready to get help.
  • Attach the copper Freon tubing to the indoor unit following the manufacturer’s recommendations. Use insulating materials.
  • Make a hole for the pipes and wires.
  • Run the piping from the indoor unit to the outside. You may need to use an assistant here as well.

Step 2. Installing the outdoor unit

  • Install the mini-split air conditioner on the wall using the brackets or on the ground on a special stand.
  • Connect the copper tubes between the outdoor and indoor units.
  • Ensure that the drainage pipe is properly inclined to drain the condensate.
  • Make sure all connections are tight.

Step 3. Connecting the electricity

  • Install a separate circuit breaker in the distribution panel.
  • Route the cables from the switchboard to the location where the units are to be installed.
  • Connect the cables to the appropriate terminals on the indoor unit.
  • Connect the power from the indoor unit to the outdoor unit according to the labeling.
  • Check all electrical connections with a tester to ensure that there are no exposed wires or possible short circuits.

Step 4. Vacuum the system

  • Use a vacuum pump to remove air and moisture from the system before startup. This is to prevent damage to the compressor.

Step 5. Startup and checking the operation

  • After all connections and vacuuming are complete, turn on the equipment and check its operation.
  • Make sure that the indoor unit is cooling or heating the room properly and that the outdoor unit is running smoothly.

Advantages of professional installation of mini-split systems

If you do not have sufficient experience in installing air conditioners, we recommend that you contact professionals. Rocky Mountain’s certified specialists know how to install mini-split air conditioning systems in the most challenging locations.

We will provide:

  • Development of an installation project
  • Compliance with all standards and tolerances
  • Accurate work at every stage
  • Timely maintenance and repair

Trust your comfort only to the best in the HVAC industry. Our specialists offer advice, repair, maintenance, and installation of mini-split air conditioning systems with a guarantee. Thanks to their professionalism, you will be able to enjoy comfort in your home or office for many years.