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Daikin
Daikin 18.0kW Inverter Ducted Reverse Cycle System, Three Phase (FDYQN180LCV1)
Cooling18.00kW
Heating20.00kW
Home size220-320 m2
Indoor noise45.0 dB
Warranty5 years
The Daikin FDYQN180LCV1 is an 18.0kW three-phase inverter ducted system with 20.0kW of heating — the size where you move out of domestic territory and into large homes and light commercial premises.
This requires a three-phase supply. Coalfields Climate Control confirms what your property actually has before quoting, because retrofitting three-phase is a significant separate cost.
Overview of Daikin 18.0kW Inverter Ducted Reverse Cycle System, Three Phase (FDYQN180LCV1)
▾The FDYQN180LCV1 indoor unit pairs with the RZQ180MY1 outdoor unit on a 415V three-phase supply. Rated capacity is 18.0kW cooling and 20.0kW heating, modulating from 9.0kW to 18.0kW in cooling.
This range differs from the single-phase FDYAN units in two ways that matter beyond the phase count. It uses a hermetically sealed scroll compressor rather than a swing compressor, and it runs on R410A refrigerant rather than R32. R410A has a higher global warming potential and a different service cost profile — worth factoring into whole-of-life cost rather than just comparing purchase price.
The indoor unit is 470 x 1200 x 997 mm at 70kg — deep as well as tall, and needing real ceiling space plus an access route. The outdoor unit is 1680 x 930 x 765 mm at 138kg and needs a proper concrete base.
Pipe connections are brazed rather than flared: 9.5mm liquid, 19.1mm gas. Maximum pipe run is 50m.
– 18.0kW cooling and 20.0kW heating on 415V three-phase supply
– Hermetically sealed scroll compressor
– 1160 l/s nominal airflow, 1200 l/s maximum
– Zoning compatible for room-by-room and area control
– Brazed pipe connections for a more robust long-term seal
– 50m maximum pipe run
– 5-year parts and labour warranty when professionally installed in domestic premises
Is the Daikin 18.0kW Inverter Ducted Reverse Cycle System, Three Phase (FDYQN180LCV1) right for your home?
▾– Very large homes, roughly 220 to 320 m2 of conditioned floor area
– Light commercial premises — offices, medical suites, retail floors, community halls
– Properties that already have a three-phase supply available
– Buildings with high occupancy or high internal heat gain from equipment
– Multi-zone installations serving distinct areas with different schedules
Commercial installations may carry different warranty terms to domestic ones. We confirm the applicable terms at quoting stage rather than assuming the domestic 5-year position applies.
Performance & Efficiency
▾Cooling Capacity
18.0 kW
Heating Capacity
20.0 kW
Recommended Room
220–320 m²
Inverter
Yes
YesEER
3.09
COP (Heating)
3.27
Capacity range 9.0-18.0kW cooling, 10.0-20.0kW heating. TCSPF (residential) 3.61/3.15/3.13 and HSPF 3.23/2.95/2.61 (hot/average/cold) under the GEMS 2019 Determination. Airflow 1160/1200 l/s nominal/max. Figures measured to AS/NZS 3823.1.2.
Noise Levels
▾Indoor Max
45.0 dB(A)
Outdoor
58 dB(A)
Indoor sound level at high fan, measured 1.5m from the unit. Outdoor sound pressure at high fan, measured 1m from the unit. EPA sound power level 72 dBA -- worth checking against boundary noise limits on tighter sites.
Power & Installation
▾Power Supply
415V Three Phase
Max Power Input
6.11 kW
Max Pipe Length
50 m
Three-phase supply required -- confirm available before specifying. Indoor unit 470mm high; check ceiling space. Brazed pipe connections: 9.5mm liquid, 19.1mm gas. Drain BSP 3/4 inch internal thread. Hermetically sealed scroll compressor. Outdoor operating range -5 to 43 degrees C DB cooling, -20 to 16 degrees C WB heating.
Refrigerant & Environment
▾Refrigerant
R410A
This range uses R410A rather than the R32 used across the single-phase FDYAN range. R410A has a higher global warming potential and a different service and top-up cost profile -- worth factoring into whole-of-life cost.
Dimensions & Weight
▾Indoor (W×H×D)
1200 × 470 × 997 mm
Outdoor (W×H×D)
930 × 1680 × 765 mm
Warranty
▾Warranty period
5years
5-year parts and labour warranty on ducted systems professionally installed in domestic premises in Australia. Commercial installations may carry different terms -- confirm at quoting stage.
Model Details
▾Model NameInverter Ducted
Model NumberFDYQN180LCV1
Indoor UnitFDYQN180LCV1
Outdoor UnitRZQ180MY1
Features
▾Eco Mode
Zoning
Quiet Mode
Auto Restart
Weekly Timer
Energy Efficiency & Performance
▾The FDYQN180LCV1 is rated at 3.09 EER cooling and 3.27 COP heating. Seasonal figures under GEMS 2019 are a TCSPF of 3.61 / 3.15 / 3.13 and HSPF of 3.23 / 2.95 / 2.61.
Those seasonal figures are noticeably below the single-phase FDYAN range — the 14.0kW FDYAN140AV1 manages 3.87 TCSPF in the average zone against 3.15 here. If your heat load sits near the boundary between the two ranges, and single-phase can carry it, the FDYAN unit is meaningfully more efficient over a season.
Rated input is 5.82kW cooling and 6.11kW heating, spread across three phases.
The R410A refrigerant is the other whole-of-life consideration. It costs more to top up than R32 and carries a higher global warming potential, which matters both for running cost and for any future regulatory change affecting high-GWP refrigerants.
Installation Notes for the Daikin 18.0kW Inverter Ducted Reverse Cycle System, Three Phase (FDYQN180LCV1)
▾This system pairs the FDYQN180LCV1 indoor unit with the RZQ180MY1 outdoor unit, on a 415V three-phase supply, with a maximum pipe run of 50m.
A ducted system is a building job as much as an equipment job. Before quoting, Coalfields Climate Control assesses ceiling space and access, plans the zone layout and duct runs, calculates the heat load room by room, checks the electrical supply, and confirms where the outdoor unit can sit without creating a noise problem at a boundary.
What supply and install through us covers:
– Manufacturer-approved installation by qualified technicians, so the warranty is not compromised by a non-compliant install
– A lifetime guarantee of workmanship on the installation itself
– A 10-day install guarantee on split system installations in Singleton
– Drop sheets laid before work starts, mess cleaned up afterwards, and a walkthrough of how to operate the system
The most common problem we are called out to fix is not a faulty unit — it is an installation issue: undersized selection, poor outdoor unit placement, or drainage that was never set up properly. Getting the supply and the install from one local team means one number to call if anything is not right.
To arrange a site assessment and quote, call 0422 493 102.
Warranty Information
▾Daikin provides a 5-year parts and labour warranty on ducted systems professionally installed in domestic premises in Australia.
That warranty depends on the installation being carried out correctly by a qualified installer, and on normal use and maintenance. A DIY or unlicensed install is the fastest way to void it — and handling refrigerant without a licence is an offence in Australia regardless of the warranty position.
Coalfields Climate Control installs to manufacturer specification and is manufacturer-approved for full warranty servicing across all major brands, so ongoing servicing can be handled locally rather than through a metropolitan agent. Our own workmanship carries a lifetime guarantee on top of the product warranty.
Warranty coverage depends on correct installation, normal use, maintenance requirements and the manufacturer current warranty terms.
Frequently Asked Questions
▾What size home does the FDYQN180LCV1 suit?
Roughly 220 to 320 m2 of conditioned floor area. Floor area is only a rough guide though -- ceiling height, insulation, glazing and orientation change the answer significantly. We do a room-by-room heat-load calculation on site before quoting a ducted system.
Do I need a three-phase power supply?
This model needs a 415V three-phase supply. Many Singleton homes have single-phase only, and bringing three phase to a property is a significant separate cost. We confirm what your property actually has as part of the site assessment -- before you commit to anything.
Will the indoor unit fit in my roof space?
The indoor unit is 470mm high and 1200mm long, and it has to be lifted into position as well as fitted. Ceiling space and access route are among the first things we check on site -- it is far better to find a problem at assessment stage than on installation day.
What refrigerant does it use?
This model uses R410A. The single-phase FDYAN range uses R32, which has a lower global warming potential and costs less to top up. On a system with this much charge that difference is worth understanding before you commit, so we raise it at quoting stage rather than after.
How much does a ducted system cost to install in Singleton?
Ducted pricing depends on the number of zones, duct runs, ceiling access, electrical work and where the outdoor unit can go -- far more variable than a split system. We quote after a full site assessment and heat-load calculation. Call 0422 493 102 to arrange one.
Does zoning actually save money?
Yes, and it is the single biggest lever on running cost. Conditioning three rooms instead of seven cuts consumption roughly proportionally. Getting the zone plan right at design stage matters more to your bills than small differences in equipment efficiency ratings.