Daikin (Building) > VRV Water Cooled (RWEYQ-PY1)

Product Description :

A water cooled intelligent individual air conditioning system suitable for tall multi-storeyed buildings.

Enhanced design flexibility
Water-cooled VRVIII uses water as its heat source, so it is optimal for large buildings, including tall, multi-storey buildings, because the system can tolerate water pressure of up to 1.96 MPa.
Furthermore, if the currently installed heat source’s water temperature is between 10°C and 45°C, it may be possible to use the existing water pipe work and heat source. This alone makes it an ideal system solution for building refurbishment projects. Because the system is water-cooled, outdoor air temperature does not affect its heating capacity. In addition, water cooling means no defrost operation is required, and the resultant rapid start-up time assures quick and comfortable heating, even in cold environments.

Compact and lightweight
Adoption of a water heat exchanger and optimisation of the refrigerant control circuit has resulted in compact and lightweight equipment. A weight of 149 kg and height of 1,000 mm make installation possible in buildings with limited space, or where no space is available for outdoor units. This makes the system ideal for places that have no outside areas—such as underground malls. Stacked configuration is also possible, further contributing to space savings.
* The unit is designed for indoor installation only.

Long refrigerant piping length
Within the refrigerant piping system, a maximum of 120 m of actual piping length and 50 m of level difference between the VRV-WIII and indoor units are possible. Water piping does not enter occupied spaces, so there is little chance of water leaking.
Actual piping length: Max. 120 m
Equivalent piping length: Max. 140 m
Total piping length: Max. 300 m

Energy saving heat recovery operation
Daikin offers 2-stage heat recovery operation.
The first stage of heat recovery operation is within the refrigerant system. By controlling the BS unit that switches cooling and heating, simultaneous cooling and heating operation is made possible, with heat recovery performed between indoor units.
The second stage of heat recovery operation is within the water loop, where heat recovery is performed between the VRV-WIII systems.
This 2-stage heat recovery operation substantially improves energy efficiency and makes the system the ideal solution to the requirements of modern office buildings, where some areas may require cooling even in winter, depending on the amount of sunshine received and the number of people in the room.

A variety of functions that realise easy installation and improve reliability
• Features a pump interlock function that controls the pump of the heat source simultaneously with the starting of the
VRV-WIII unit. This significantly simplifies operation and management.
• Employs DIII-NET to enable the shared use of the wiring between the indoor units, the VRV-WIII unit, and the central control wiring.
• Provides an auto address setting function and check function that detects connection errors in wiring and piping
for easier installation.
• Water piping goes only to the VRV-WIII unit with refrigerant piping running in occupied spaces, so there is little chance of water leakage or corrosion.