How to Install a Split System Air Conditioner: What's Involved
Many buyers wonder what is involved in installing a split system air conditioner before they purchase one. Understanding the installation process helps you plan better, ask the right questions, and avoid unexpected costs. This guide explains what a professional installation involves and what to consider before you buy.
What Is a Split System Air Conditioner?
A split system air conditioner consists of two units:
- Indoor unit (evaporator): Mounted on the wall inside the room. Cools and heats the air.
- Outdoor unit (condenser/compressor): Mounted outside the building. Releases or absorbs heat from the outside air.
The two units are connected by refrigerant piping, electrical cables and a drain hose, running through the wall or via a concealed route.
What Does a Professional Installation Involve?
1. Site Assessment
An installer will assess:
- The best location for the indoor unit (usually high on a wall for air distribution)
- The best location for the outdoor unit (must have adequate clearance, airflow and be accessible for maintenance)
- The routing of the pipe run between indoor and outdoor units
- Electrical requirements (most residential units require a dedicated 15A or 20A circuit)
2. Mounting the Indoor Unit
The installer mounts a bracket plate on the wall, drills a core hole through the wall (typically 65–75mm diameter) for the pipe run, and mounts the indoor unit on the bracket.
3. Refrigerant Pipe Run
Copper refrigerant pipes (pre-insulated, typically 1/4" and 3/8") are run from the indoor unit through the wall and to the outdoor unit. The pipe run is covered with a PVC conduit or trunking on the exterior wall for a neat finish and UV protection.
4. Electrical Connection
An electrical circuit from the switchboard is required. This is the part of the work that must be done by a licensed electrician. Many installation companies include an electrician in their team. Some installations can connect to an existing circuit; others require a new dedicated circuit run from the switchboard.
5. Outdoor Unit Placement
The outdoor unit is placed on a flat surface (usually a wall bracket or concrete pad). It must have adequate clearance on all sides for airflow. For apartments, the unit is typically mounted on a wall bracket on the balcony or on the external wall (strata approval required).
6. Refrigerant Charging and Testing
The installer connects the pipes, evacuates any air/moisture from the refrigerant circuit, and either opens pre-charged valves or charges the system with refrigerant. The system is then tested for cooling and heating operation.
What You Need to Provide
- Access to the installation location (clear wall space, accessible roof/ceiling cavity if routing internally)
- A powered switchboard (for the electrical circuit)
- For apartments — strata approval for the outdoor unit installation
- For rental properties — landlord permission
Typical Installation Cost in Sydney
Split system installation costs in Sydney vary based on complexity. A standard wall installation with a straightforward pipe run typically costs $500–$900 installed. More complex installations (long pipe runs, multi-storey, internal pipe routing, new electrical circuit) will cost more.
Can I Install It Myself?
No. In Australia, working with refrigerant requires an ARC (Australian Refrigeration Council) licence. Electrical work requires a licensed electrician. DIY installation is illegal and will void the manufacturer's warranty. Always use a licensed installer.
Buy Your Split System at Oceania Appliances
Oceania Appliances stocks Daikin, Mitsubishi Electric and Fujitsu split systems. We can help you choose the right unit and advise on installation considerations. Contact us at support@oceaniaappliances.com.au or visit our Wetherill Park showroom. Open 7 days 10am–8pm.