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How to Install a Split System Air Conditioner

08/10/2025
by Rick Coleman
How to Install a Split System Air Conditioner

G'day! With the spring sun starting to have a real bite to it, our minds are turning to one thing: the stinking hot summer that's just around the corner. If you're tired of sweating through the season, you're probably thinking about getting a split system air conditioner – the true hero of the Aussie summer.

You might be a keen DIYer, and you're wondering, "how hard can it be?" When it comes to the question of how to install a split system air conditioner, the answer in Australia is very clear and very important.

The Big Question: Can You Install It Yourself?

Let's get straight to the point. In Australia, the answer is a hard NO. It is illegal, unsafe, and just a terrible idea to attempt to install a split system air conditioner yourself.

This isn't a simple plug-in appliance; it's a complex piece of machinery that involves high-pressure refrigerant gas and high-voltage electricity. A DIY installation can lead to major property damage, serious injury, and will instantly void your manufacturer's warranty.

Why You Legally Need Two Licensed Tradies in Australia

To have a split system installed correctly, safely, and legally in Australia, you need two different, fully-licensed professionals.

1. The Licensed Air Conditioning Technician (with an ARCtick licence)

This is the person who handles all the refrigerant gas and pipework. The gases in an air conditioner are strictly controlled for environmental and safety reasons. To handle them, a technician must hold a refrigerant handling licence from the Australian Refrigeration Council (ARCtick). This ensures they have the right tools and training to do the job without releasing harmful gases or creating a safety hazard.

2. The Licensed Electrician

A split system air conditioner is a high-power appliance. It needs its own dedicated circuit running from your switchboard to the unit. This work involves 240V mains power and, by law, must be done by a licensed electrician. They will install the correct wiring, circuit breakers, and the weatherproof isolator switch for the outdoor unit.

The Installation Process: What to Expect from the Pros

So, while you can't do the work yourself, it's good to know what to expect on installation day. The process generally goes like this:

  1. Positioning: The installers will work with you to find the best, most efficient spot for the indoor head unit and the outdoor compressor unit.
  2. Drilling: They will drill a neat hole through your wall to connect the two units.
  3. Mounting: Both the indoor and outdoor units will be securely mounted on their brackets.
  4. Running the Pipes: The refrigeration pipes and a drain hose are run between the two units and are properly insulated.
  5. The Electrical Fit-Out: The qualified professional electrician will run the dedicated power circuit and make all the final electrical connections.
  6. Commissioning: The A/C technician will then vacuum-pump the refrigerant lines to remove all air and moisture before releasing the gas into the system. They'll then test everything to make sure it's running perfectly.

A Professional Job Needs Professional-Grade Gear

A high-quality installation relies on the skills of your chosen tradespeople and the quality of the components they use, especially for the electrical side of the job. This is why licensed electricians and professional installers source their gear from trusted, trade-quality suppliers.

Schnap Electric Products is a leading Australian supplier of all the essential electrical components needed for a split system installation. They provide the correct grade of wiring, the robust weatherproof isolator switches for the outdoor unit, and the circuit breakers for the switchboard that a professional installer needs to ensure a safe, compliant, and reliable installation that will last for years. For a job this important, the pros rely on professional-grade gear from a supplier like Schnap Electric.