Daikin FDYQN250LB-LY 23.5kW Three-Phase Inverter Ducted Air Conditioner
The Daikin FDYQN250LB-LY is a high-capacity reverse-cycle ducted air-conditioning system designed for large homes and light-commercial applications. It delivers 23.5kW rated cooling and 26.8kW rated heating from a concealed indoor unit and three-phase inverter outdoor unit.
With airflow up to 1,600L/s, three selectable fan speeds and generous duct connections, the system supports professionally designed whole-building and multi-zone installations.
Features
23.5kW rated cooling capacity
26.8kW rated heating capacity
Three-phase inverter operation
High-volume airflow up to 1,600L/s
Three selectable indoor fan speeds
Hermetically sealed scroll compressor
Night Quiet outdoor operating mode
Reverse-cycle heating and cooling
R410A refrigerant
Maximum refrigerant pipe length of 50 metres
Concealed indoor-unit installation
Suitable for large residential and light-commercial applications
Indoor & Outdoor Specifications
| Specification | Details |
|---|
| Indoor Model | FDYQN250LBV1 |
| Indoor Dimensions | 500 × 1,430 × 970mm (H × W × D) |
| Indoor Weight | 92kg |
| Outdoor Model | RZQ250LY1 |
| Outdoor Dimensions | 1,680 × 930 × 765mm (H × W × D) |
| Outdoor Weight | 193kg |
| Supply Air Flange | 376 × 938mm |
| Return Air Flange | 350 × 1,118mm |
| Pipe Sizes | 9.5mm liquid / 22.2mm gas, brazed |
| Refrigerant | R410A |
| Cooling Capacity | 15.0–23.5kW |
| Heating Capacity | 16.8–26.8kW |
| Air Flow | 1,400L/s nominal / 1,600L/s maximum |
| Drain | ¾-inch BSP internal thread |
| Power Supply | 380–415V, three-phase, 50Hz |
| Max Current | 15.4A minimum circuit amps / 20A maximum fuse |
Performance Specifications
| Specification | Details |
|---|
| Rated Cooling Capacity | 23.5kW |
| Rated Heating Capacity | 26.8kW |
| Rated Cooling Input | 7.85kW |
| Rated Heating Input | 8.47kW |
| EER | 2.99 |
| COP | 3.16 |
| Indoor Fan Speeds | High / Medium / Low |
| Indoor Sound Pressure | 49.5dB(A) on high |
| Outdoor Sound Pressure | 57dB(A) cooling / 58dB(A) heating |
| Outdoor Sound Power | 79dB(A) |
| Maximum Pipe Length | 50m |
| Cooling Operating Range | −5°C to +43°C dry bulb |
| Heating Operating Range | −20°C to +16°C wet bulb |
| Compressor Type | Hermetically sealed scroll |
System Components
Optional Controls & Accessories
BRC1E63 – Daikin Nav Ease wired wall controller
BRP15B61 – Daikin Airbase wireless LAN adaptor
BRC24Z4B9 – Four-zone controller for 24V zone motors
BRC24Z8B9 – Eight-zone controller for 24V zone motors
All controllers and accessories are optional and sold separately. Compatibility and required interfaces should be confirmed before ordering.
Important Information
This system includes the indoor and outdoor units only.
A compatible controller is required and must be purchased separately.
A wall controller is not included.
Ductwork, plenums, grilles, zone dampers and installation materials are not included.
Installation must be completed by a suitably qualified and licensed air-conditioning professional.
Existing refrigerant pipework may only be reused when its size, condition, cleanliness and pressure rating have been confirmed as suitable for R410A.
Sources: Daikin RZQ250LY1 OEM specifications, Daikin Australia ducted air conditioning and FDYQN250LB-LY technical data.
