Water-Cooled
Systems

Features

• Unified heat pump or heat recovery (simultaneous operation) condensing unit.
• 6, 7, 12, 14, 18 and 21 ton, 208 - 230V and 460V / 3-phase power for commercial applications.
• 7 combinations of condensing unit, up to 21-ton serving up to 36 indoor units.
• Up to 1,024 indoor units can be operated on a single wiring system.
• Continuous operation allows for cold climate capability delivering comfortable heating performance with no defrost.
• Long refrigerant lines, up to 980 feet of pipe (390 feet max. linear liquid piping length), 164 feet height difference.
• The System (Braze Plate Heat Exchanger) can tolerate water pressure up to 285 psi (or 640 ft. of Head).
• Optimum water flow rates per module of 16 gpm or greater (operable range 13.2 ~ 39.5 gpm).
• Modular units can be interconnected to make combinations of up to 21 tons systems.
• Operates with closed loop cooling tower, dry cooler, boiler, and geothermal solutions.
• System diversity up to 130% connectivity of nominal capacity.
• Compact size, 39-3/8” in height, 30-3/4” wide and just 330lbs. Modular cabinet enables stacked multiple unit installations.
• The advanced, self-diagnostic, auto-check function will detect a malfunction and immediately display the type and location so it can be resolved quickly and effectively.
• RWEYQ condensing unit sound level as low as 50dB(A).
• Zone LCD Remote Controller for up to 16 zones and provides a host of operational functions, including 7-Day Programmability.
• Connects to the full suite of advanced Daikin Control Solutions including I-Touch Controller and I-Touch Manager. 
• Can be integrated to Open Protocol Building Management Systems via the Daikin BACnet® and LonWorks® interfaces.

Water Cooled VRV

Water cooled VRV systems are equivalent to 4-pipe chilled water systems, but also offer a viable alternative to water-source heat pump solutions. Each connected indoor unit can provide heating or cooling independently to suit zone requirements, making these systems suitable for both open plan spaces and individual zones with varying temperature requirements.

Brazed plate heat exchanger High efficiency compressor Smooth sine wave DC inverter Integrated water loop control Compact design

1. Brazed plate heat exchanger

Refrigerant-to-water heat transfer is accomplished using a high efficiency, brazed plate heat exchanger. Water pressure drop through the heat exchanger is minimized, and an industry leading water temperature range allows for entering water temperatures as low as 27°F in cooling and 14°F in heating.

The brazed plate heat exchanger also enables a much more compact design over other types of heat exchangers, which contributes to such a low footprint.

2. High efficiency compressor

Daikin’s unique scroll compressor minimizes heat loss and is driven by a high efficiency motor to achieve significant Energy savings. 

*High thrust mechanism:
By introducing high pressure oil, the reactive force from the fixed scroll is added to the internal force, thereby reducing thrust losses.  This results in improved efficiency and suppresses sound levels.

3. Smooth sine wave DC inverter

By adoption of the Sine Wave, which smooths the rotation of the motor, operation efficiency is greatly improved.

4. Integrated water loop control

An integrated operational output allows the water cooled VRV system to energize and de-energize pumps or open and close isolation valves when the system is not in operation.  An integrated flow proving input provides an interface for a water loop flow meter to ensure the system’s compressors do not operate if there is a loss of flow in the water loop. 

5. Compact design

The water-cooled VRV design is based on a modular concept; all water-cooled condensers are of the same dimensions and are available in 6-Ton and 7-Ton modules.  With a footprint of only 4.6 square feet, a height of only 39 inches, and the ability to stack modules, a 28-ton system requires only about 10 square feet of floor space. 

Technology