Installing a mini split air conditioner requires technical attention and the use of appropriate tools. It is always best to hire a certified professional, but understanding the process helps you to carry out the service safely. Below, check out the basic step-by-step guide to installing a mini split:
1. Choosing the Installation Location
Indoor Unit (evaporator):
Install on a solid wall, away from sources of heat, steam or direct sunlight.
Leave at least 15 cm of free space on the sides and top.
Ensure easy access for future maintenance and cleaning of filters.
Outdoor Unit (condenser):
Must be in a well-ventilated location, protected from direct rain and excessive sunlight.
Install on a solid support, avoiding vibrations and contact with the floor.
Keep the minimum recommended distance from the wall to avoid impairing air flow.
2. Drilling and Fixing the Internal Unit Support
Use a level to ensure horizontal alignment.
Drill holes in the wall and secure the metal support with wall plugs and screws.
Also drill holes to pass the copper pipes, drain hose and electrical cables to the outside.
3. Installing the Indoor Unit
Connect the copper pipes (suction and liquid line), drain and electrical wires.
Secure the unit to the support already fixed to the wall, ensuring that everything is well sealed and aligned.
The drain hose must have enough drop to allow the water to drain.
4. Installing the Outdoor Unit
Place the condenser on a level metal base or support.
Carefully connect the copper pipes, drain and electrical cables.
Make sure there are no bends or constrictions in the pipes.
5. Leak and Vacuum Test
Before releasing the gas, perform a leak test with nitrogen to identify possible leaks.
Then use a vacuum pump to eliminate moisture and air from the system.
Leave the vacuum for at least 15 minutes and check that the pressure remains stable.
6. Gas Release and Final Tests
After the vacuum, carefully release the refrigerant gas by opening the valves with an Allen key.
Turn on the equipment and check operation, cooling, noises and any dripping.
Test the remote control and all main functions.
Final Considerations
Never reuse old piping without cleaning it properly.
Make sure to use electrical cables with the correct gauge for the equipment's power.
Always consult the manufacturer's manual to follow the specific recommendations for the model.
Installing a mini split is a technical and detailed process. To ensure efficiency, safety and avoid future losses, whenever possible, hire a qualified technician registered with CREA or certified by the manufacturer.
