Installing a mini split air conditioner goes far beyond simply fixing the unit to the wall.
🔧 A poorly done installation can lead to low performance, high energy consumption, and even damage to the equipment.
Therefore, even though the service should be done by a professional, understanding the process is fundamental. Let's go step by step!
1️⃣ Choosing the Installation Location
Indoor Unit – Evaporator
The evaporator should be installed in a strategic point in the room:
✔️ Firm and well-structured wall
✔️ Away from heat sources, steam, and direct sunlight
✔️ Minimum space of 15 cm on the sides and top
✔️ Easy access for cleaning the filters and future maintenance
A good choice ensures better air circulation and thermal efficiency.
Outdoor Unit – Condenser
The condenser needs to “breathe” well:
✔️ Well-ventilated location
✔️ Protection from excessive sun and direct rain
✔️ Installed on a firm metal support or level base
✔️ Adequate distance from the wall to avoid blocking airflow
This prevents overheating and unwanted vibrations.
2️⃣ Drilling and Fixing the Evaporator Support
🔩 Using a level, the metal support is fixed perfectly aligned on the wall.
Then:
Holes are drilled for the passage of copper pipes,
Drain hose,
And electrical cables to the outside.
Everything needs to be well sealed to prevent leaks.
3️⃣ Indoor Unit Installation
Now comes the component connection:
🔹 Copper pipes (suction and liquid lines)
🔹 Drain hose
🔹 Electrical wiring
The evaporator is then firmly fitted onto the support.
⚠️ Special attention to the drain hose, which must have the correct inclination to prevent internal leaks.
4️⃣ Outdoor Unit Installation
The condenser is positioned on:
✔️ Concrete base
✔️ Or leveled metal support
Connections are made carefully to avoid:
❌ Bends in the pipes
❌ Constrictions
❌ Future leaks
Every detail here directly influences the compressor's lifespan.
5️⃣ Leak and Vacuum Test
This is one of the most important steps in the installation.
🧪 First, a leak test is performed with nitrogen to ensure there are no leaks.
🌀 Then, a vacuum pump is used to remove air and moisture from the system.
⏱️ The vacuum must remain for at least 15 minutes, with stable pressure.
6️⃣ Gas Release and Final Tests
With everything ready:
🔑 The valves are opened with an Allen wrench to release the refrigerant gas.
🔌 The unit is turned on and tested:
✔️ Cooling capacity
✔️ Abnormal noises
✔️ Dripping
✔️ Remote control functions
Everything needs to work perfectly.
⚠️ Important Considerations
🚫 Never reuse old piping without proper cleaning
⚡ Use electrical cables with the correct gauge
📘 Always follow the manufacturer's manual instructions
✅ Conclusion
Installing a mini split system is a technical process that requires knowledge, appropriate tools, and attention to detail.
To ensure:
✔️ Maximum performance
✔️ Energy savings
✔️ Safety
✔️ Equipment durability
👉 Ideally, always use a qualified technician with professional certification or registration.
