What Happens During a Split System Installation?
A split system air conditioner is one of the most popular cooling solutions for Australian homes — and for good reason. It's efficient, relatively quiet, and doesn't require the extensive ductwork of a central system. But the installation process involves more than just hanging a unit on a wall. Here's what you can expect.
Before Installation Day
A qualified installer should visit your property (or discuss via photos) to assess:
- The best wall position for the indoor unit — ideally high on an interior wall, away from direct sunlight
- Where to route the refrigerant pipes, electrical cables, and condensate drain line
- The most suitable outdoor location for the compressor unit — must have adequate airflow and be away from bedrooms where possible
- Your existing electrical switchboard capacity
Make sure you get a written quote that includes labour, materials, and any additional electrical work required.
The Installation Process: Step by Step
- Mounting the indoor unit bracket: A wall bracket is securely fixed to studs or masonry. The installer checks for level before drilling.
- Drilling the wall penetration: A core hole (typically 65–75mm) is drilled through the wall at a slight downward angle to allow for drainage.
- Routing the line set: The refrigerant pipes, electrical cables, and drain hose are bundled together and run through the wall penetration to the outdoor unit location.
- Installing the indoor unit: The unit clips onto its wall bracket and is connected to the line set and electrical supply.
- Positioning the outdoor unit: The compressor is placed on a concrete pad, wall brackets, or roof frame — it must be level and stable.
- Connecting refrigerant lines: This must be done by a licensed refrigerant handling technician. Pipes are connected, then pressure-tested for leaks.
- Vacuuming the system: A vacuum pump removes all moisture and air from the refrigerant lines before the refrigerant is released.
- Electrical connection: A dedicated circuit from your switchboard is recommended. A licensed electrician must perform this work.
- System commissioning: The unit is powered on, tested in cooling and heating modes, and airflow/temperatures are verified.
How Long Does It Take?
A standard single split system installation typically takes 2 to 4 hours. More complex jobs — such as long pipe runs, roof space routing, or electrical upgrades — may take a full day.
DIY vs. Professional Installation
In Australia, it is a legal requirement that refrigerant handling be performed by a licensed ARCtick technician, and electrical work must be done by a licensed electrician. Attempting to install a split system yourself is not only dangerous — it can void the manufacturer's warranty and result in fines. Always use a qualified professional.
After Installation
- Ask your installer to walk you through the remote control functions
- Note the date of installation for warranty purposes
- Schedule your first service in 12 months
- Keep the area around the outdoor unit clear of debris and vegetation
Key Takeaway
A proper split system installation done by a licensed professional is an investment in comfort and efficiency. Cutting corners on installation can lead to refrigerant leaks, poor performance, and costly repairs down the track. Do it right the first time.