Daikin has extended the capabilities of its mechanical ventilation range, giving consultants increased design flexibility and ensuring faster, simpler installation for installers. The introduction of larger expansion valve kits and a new control option offers an easy and convenient solution for the connection of DX condensing units in medium-sized air handling unit systems, providing the widest range of control options now available on the market in a simplified design.
Daikin’s comprehensive range of mechanical fresh air ventilation solutions for commercial applications is suitable for a variety of applications from smaller ventilation requirements with flow rates of 150-2,000m3/hour (HRV range) to larger air handling units capable of handling flow rates of up to 144,000m3 /hour and an ESP of up to 1,500 Pa.
The benefits of DX condensing units
When integrated with Daikin outdoor units, Daikin Air Handing Units (AHU’s) can provide a total solution for fresh air for offices, hotels, stores and other commercial outlets. Like our range of water-based inverter chiller systems, Daikin DX condensing units benefit from ‘plug and play’ connectivity for faster installation.
Designed for high efficiency, Daikin DX condensing units offer a fast response to changing loads and are simple to install in comparison with water-based systems. The ERQ series for combination with single DX coils is suitable for small warehouses, showrooms and offices while the VRV IV range is designed for larger applications and for use in combination with indoor units for comfort cooling/heating.
Widest range of control options on the market
Previously Daikin offered three control options for connecting Daikin AHU’s or third party AHU’s to Daikin condensing units:
X control – Discharge temperature is tightly controlled via third party DDC controller. Used for special applications where precise control of temperature and air quality is needed such as clean rooms. This option requires reprogramming of the DDC controller.
Y Control – Cost efficient solution for basic fresh air treatment via a fixed evaporating/condensing temperature. Used in applications where outdoor and indoor temperatures remain similar throughout the year. This solution does not require a DDC controller.
Z Control – Controls the return air temperature to the AHU via the Daikin standard room controller, allowing the AHU unit to be adjusted in the same way as a VRV indoor unit. VRV indoor units and air handling unit can even be controlled in the same unit group. Typically used in office settings or other similar comfort applications where multiple indoor units are required.
Daikin’s new W Control option provides an alternative to the existing X control method. Using an off-the-shelf DDC controller, the W Control requires no re-programming and is suitable for most comfort applications where discharge temperature and other detailed control of the air handling unit is needed such as filtration level, humidification etc.
Uniquely, the ‘first in class’ W Control incorporates a new 0-10V step logic providing “infinite” capacity adjustments, offering a flexibility that outperforms other alternatives available on the market.
New valve kits allow connection of larger AHU’s to a single refrigerant circuit
The availability of new larger class 400 and 500 expansion valve kits from Daikin means that DX condensing units of up to 54HP with a cooling capacity of 151.2 kW can now be connected to a single AHU, offering a simple connection solution for medium-sized systems.
Plug and Play
Both the control box and expansion valve can be factory installed in the Daikin AHU prior to delivery to site, allowing installers to get systems up and running quickly. Both the control box and expansion valve can also be ordered separately, allowing Daikin condensing units to be connected to third party AHU’s.
The ‘plug and play’ connectivity of Daikin’s AHU range offers significant advantages both for installers and end-users. Combining all system elements in a ‘one stop’ solution ensures seamless integration and maximises design flexibility while keeping installation and commissioning time to a minimum. At the same time the potential for reducing running costs and carbon emissions through integration is huge.
In full control
Daikin’s intelligent Touch Manager enables the control of Daikin’s AHU range with its HVAC-R systems and even third party equipment, providing maximum precision and ease of use through centralised control in a simplified design. End-users benefit from a high degree of control, with a wide range of user-definable settings, giving them improved air quality and creating the perfect indoor environment.
Software tools are available to installers to assist with the specification of VRV and AHU units to achieve the best possible results.