Daikin OUTDOOR-UNIT-RWEYQ-T Outdoor Heat Pump Unit (Outdoor Unit Only)

Daikin VRV IV Water Cooled (VRV IV-W) is an individual air conditioning system that utilities water as a heat source. In this unique system, water is piped from a central cooling tower or boiler to the compact VRV IV-W unit (the equivalent of the outdoor unit/condenser in a conventional air conditioning system) and after heat exchange, refrigerant is piped from the VRV IV-W unit to each indoor unit. This unique system allows this condenser to be placed inside the building, which greatly extends design flexibility and makes it easier to adapt to creative building facades where air cooled VRV solutions are not possible. Furthermore VRV IV-W can perform as a heat pump or heat recovery system to suit the requirements of most commercial applications.

Key Features & Technology

VRT automatically adjusts refrigerant temperature to individual building and climate requirement, thus further improving annual energy efficiency and maintaining comfort.

Condensers are compact 780x550x1,000mm (WxDxH), lightweight – 146kg (16kW class) and can be double-stacked to minimize spatial requirements

Condensing unit sound level as low as 49dB(A)

Continuous operation for cold climates, delivering comfortable heating performance with no defrost

The advanced self-diagnostic auto-check function detects malfunctions, immediately displaying the fault type and location so it can be resolved quickly and effectively

Connects to all 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

Centralised Interlocking Function

Centralised interlocking input operate by using an external control adaptor (DTA104A62). Using one external control adaptor circuit board makes centralised interlocking input to multiple units within the same water system possible.

Easily Responds to Simultaneous Heating and Cooling Needs

By adding suction gas piping and a BS unit (sold separately), simultaneous cooling and heating operation can be provided by a single system. * For indoor units used for cooling only (do not connect to BS unit when using for heat recovery), total capacity index must be 50% or less than the capacity index of the outdoor units.

Water-Side Infrastructure & Components

The following Water Side components are required:

Cooling and Heating

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 heatingoperation 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 isperformed between the VRV IV W systems.This 2-stage heat recovery operation substantially improves energy efficiency and makes thesystem the ideal solution to the requirements of modern office buildings, where some areasmay require cooling even in winter, depending on the amount of sunshine received and thenumber of people in the room.

STAGE 1: Between Indoor Units

Simultaneous heating and cooling operation within the refrigerant system.

In mainly cooling, partly heating mode, the system recycles heat exhausted from the cooling operation to use for heating. In mainly heating, partly cooling mode, the system uses cooled post-heating operation refrigerant for cooling. Efficiency improves the more simultaneous operation is performed.

STAGE 2: Between

Heat recovery operation between the VRV IV W systems.

Heat recovery operation is also available between systems connected to the same water loop, with systems exchanging heat via water. This increases energy efficiency.

Innovative Water Cooled Technology

Daikin water cooled VRV air conditioning systems 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.