Upgrading, Supplying and Installing a Ducted Air Conditioner
Case Study: Daikin Multi System Upgrade in Mackay Harbour, Queensland
Project Overview
Living in coastal Queensland means air conditioning isn’t just a luxury; it’s essential for comfort, humidity control, and day-to-day livability. At this home in Mackay Harbour, the homeowner contacted Climate Air Solutions to replace an existing multi-system air conditioner that had become unreliable and no longer provided the performance needed across the home.
The client wanted a modern system that could cool multiple rooms efficiently, operate quietly, and provide year-round reverse cycle heating. They also wanted an installation that was neat, compliant, and designed to suit the different needs of the home’s key living areas.
After a site inspection and discussion around the home layout and usage patterns, Climate Air Solutions recommended a Daikin 8.0kW Reverse Cycle Inverter Multi System, paired with a mix of bulkhead and wall split indoor units to deliver tailored comfort throughout the property.
The Client’s Requirements
The client’s goals were clear:
- Replace the existing multi-system air conditioner with a more reliable solution
- Improve comfort in the lounge and bedrooms
- Ensure each room has the correct capacity for its size and usage
- Maintain a clean look, particularly in the main living space
- Install a system that would handle coastal humidity efficiently
- Complete the work with proper electrical safety upgrades and a professional finish
Because the home had multiple zones that required air conditioning, a multi-system was the best fit. It allows several indoor units to be connected to a single outdoor unit—ideal for homes where space is limited, or where a streamlined external setup is preferred.
Site Inspection and System Design
Before commencing works, Climate Air Solutions conducted a full assessment of the property to confirm:
- Room sizes and heat loads
- Indoor head placement for effective airflow
- Pipe run pathways and concealment options
- Outdoor unit location and service clearances
- Electrical requirements and safety compliance
- Existing grille condition and airflow requirements
The existing system had been installed some years prior and showed signs of age, including reduced efficiency and inconsistent operation. The ducted components and grilles also required replacement to improve airflow and presentation.
Following the inspection, our team designed a system layout that delivered comfort where the family needed it most, while keeping operation efficient and easy to control.
Step 1: Decommissioning the Existing Multi-System Air Conditioner
The first stage of the job was to safely decommission and remove the old multi system air conditioner.
This is a critical step, particularly for multi-systems, because they involve multiple indoor units and extensive refrigerant pipework. Our technicians followed correct industry procedures, including:
- Isolating electrical power to the system
- Recovering refrigerant in accordance with best practice
- Disconnecting indoor units and pipework safely
- Removing the outdoor unit and associated components
- Preparing all installation points for the new Daikin system
By completing the decommissioning properly, we ensured the home was safe, clean, and ready for the new installation without unnecessary delays.
Step 2: Supplying and Installing the New Daikin Multi System
Climate Air Solutions supplied and installed:
- 1 x Daikin 8.0kW Reverse Cycle Inverter Multi System Air Conditioner (Outdoor Unit)
- 1 x 6.0kW Bulkhead Indoor Unit in the Lounge with a wired controller
- 1 x 3.5kW Wall Split Indoor Unit in the Main Bedroom
- 2 x 2.0kW Wall Split Indoor Units in Bedroom 2 and Bedroom 3
This configuration was selected to match the different room sizes and usage requirements. The lounge area required the highest capacity and a discreet installation, while the bedrooms required quieter, efficient systems that could maintain comfort overnight without excessive energy use.
Lounge Ducted Air Conditioner Installation: 6.0kW Bulkhead with Wired Controller
The lounge was the home’s main living zone and the area with the highest heat load. For this space, the client wanted a solution that provided strong performance while keeping the installation as discreet as possible.
A 6.0kW Daikin bulkhead unit was the ideal choice. Bulkhead units sit neatly within the ceiling space, with only the grilles visible, making them perfect for living rooms where aesthetics matter.
To ensure easy and reliable operation, the bulkhead system was paired with a wired controller, giving the homeowner a simple, fixed control point that’s easy to access and operate.
Bedroom Installations: Split Systems for Targeted Comfort
For the sleeping areas, the focus was on quiet operation, stable temperatures, and efficient performance.
- The main bedroom received a 3.5kW split system, providing enough capacity for comfortable cooling and heating without over-sizing.
- Bedroom 2 and Bedroom 3 each received a 2.0kW split system, ideal for smaller rooms and consistent overnight comfort.
By using individual wall-mounted splits in the bedrooms, each room could be controlled independently. This gives the family flexibility, cools only the rooms being used, reduces energy costs and ensures personalised comfort.
Electrical Upgrade: Supply and Install 1 x Isolator
As part of the installation, Climate Air Solutions also supplied and installed 1 x new isolator.
An isolator is a critical safety component, allowing the system to be safely powered down for servicing or emergency isolation. Installing a new isolator ensured the system met modern safety requirements and provided long-term reliability.
Our technicians completed all electrical work to a professional standard, ensuring the installation was safe, compliant, and properly labelled.
New Return Air and Supply Air Grilles
To complete the job properly and improve airflow performance, Climate Air Solutions also supplied and installed new return air and supply air grilles.
Over time, grilles can become discoloured, damaged, or poorly fitted. They can also restrict airflow if they are not the correct size or design for the system.
By installing new grilles, we ensured:
- Improved airflow into and out of the bulkhead system
- A cleaner, more modern appearance
- Better overall performance and comfort
- A professional finish consistent with the new installation
The grilles were positioned and fitted neatly to suit the lounge layout and ceiling design.
Commissioning and Final Testing
Once installation was complete, our team carried out a full commissioning process. This included:
- Pressure testing the refrigerant lines
- Evacuating the system to remove moisture and contaminants
- Charging and balancing the system as required
- Testing each indoor unit in both heating and cooling modes
- Confirming correct airflow and temperature delivery
- Verifying controller operation and communication
- Checking condensate drainage and ensuring no leaks
Each head unit was tested individually to ensure correct response, smooth operation, and reliable performance across the entire system.
Final Result
The homeowner now has a modern, efficient air conditioning solution designed specifically for their home and lifestyle.
The new Daikin 8.0kW Reverse Cycle Inverter Multi System provides strong and reliable climate control across four key areas:
- Discreet, powerful comfort in the lounge via the 6.0kW bulkhead
- Quiet, efficient cooling and heating in the main bedroom
- Individual control and comfort in Bedrooms 2 and 3
With a new isolator installed and fresh return and supply grilles fitted, the system not only performs better, but it also looks cleaner and more modern.
Why Choose Climate Air Solutions
Climate Air Solutions is trusted across Mackay and surrounding areas for professional air conditioning replacements, repairs, and new installations. We specialise in multi-system solutions and ensure every job is completed with:
- Correct system sizing and design
- Quality workmanship and tidy finishes
- Safe electrical and refrigeration practices
- Full commissioning and client handover
- Reliable local support
Contact us today to schedule a free quote or learn more about our range of residential air conditioning solutions.
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