VRV-IV W

VRV IV W

Sistem water-cooled yang cocok untuk gedung bertingkat tinggi.

Seri VRV water-cooled menggunakan air sebagai sumber panas. temperatur air berkisar antara 10-45 derajat celcius, dan temperatur udara diluar tidak mempengaruhi kapasitas pendinginan. unit luar sangat ringkas dan hemat tempat.

RWEYQ-T

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

What is a water cooled system?

While an air cooled air conditioning system is designed to exchange heat recovered from indoors with outdoor air, a water cooled air conditioning system is designed for heat exchange with water

As a water cooled system does not require to exchange heat with outdoor air,

• Outside units can be installed indoors, for example, on basement floors.

> High installation flexibility

• The air conditioning operation is stable even when the outdoor air temperature is high.

>Improved comfort

The VRV IV W series combines

the characteristics of a water cooled system with the VRV system.

  • • Individual air conditioning is achieved via on-demand operation in each room.
  • • Outside units can be installed anywhere in a building if they can be connected with water piping.
  • • The length of the refrigerant piping can be minimized by installing outside units in proximity to indoor units.

[ The system can easily fit into long building floors. ]

[ The system helps reduce energy loss caused by long refrigerant piping. ]

  • • Refrigerant piping is connected to indoor units.

This design helps reduce the risks of indoor water leakage.

Design Flexibility

The VRV IV W series can meet various air conditioning needs by taking full advantage of the characteristics of a water cooled system.

Adaptable to high-rise buildings due to easy installation on each floor

Compact outside units can be easily installed in the machine rooms on each floor. This helps overcome the restriction on differences in height of refrigerant piping. Individual air conditioning can be easily provided in high-rise buildings using this VRV system.

Easy to install in underground shopping malls and subway systems

Individual air conditioning can be easily provided in underground shopping malls, subway systems, etc. using this VRV system because heat exchanging with outdoor air is not required.

Also recommended for condominiums and detached houses

We offer an extensive lineup of small capacity outside units as well as connectable residential indoor units for detached houses. Compact outside units can be installed indoors.

Renovation of an Air Conditioning System

Rising problems for old, conventional water system

Why is renovation necessary?

  1. As equipment ages, its air conditioning capacity weakens with each passing year.
  2. With frequent breakdowns in the outside unit, normal use of air conditioners is unachievable.
  3. The maintenance cost for the equipment keeps rising.
  4. The longer the equipment serves, its noise becomes louder.
  5. Scale formed in water pipes is hard to clean, accelerating corrosion and aging processes.
  6. Meeting the requirements of a 24-hour running IT room is out of the question.
  7. Catering to new tenants' partitioning changes in a timely manner is difficult.
  8. Charging by household is not possible.
  9. Serving tenants working overtime is difficult.
  10. Central control and management costs too much.

Troublesome issues in renovation?

A Flexible System, Convenient for Expansion/Renovation

Problems with existing water systems can be solved with minimal construction work.

1. Indoor installation solves the puzzle of proper placement of outdoor units

The outside units of the water cooled VRV IV W series don’t have necessity to direct heat exchanging with outdoor air. This feature makes it possible to place the outside unit inside the building, which greatly extends design flexibility and makes it easier to adapt to different types of buildings and open to various kinds of creative building exteriors.

2. Part of the old system can be retained for cost reduction

The water cooled VRV IV W series can retain the cooling tower of the old system during renovation, effectively keeping costs down.

3. The compact outside units facilitate the renovation process and saves space for the outside unit area

The outside units of the water cooled VRV IV W series are conveniently compact, which not only enables transport by elevator possible, but also effectively simplifies installation. This also saves a great deal of time and labor.

The modular design featured by the water cooled VRV IV W series enables a free and flexible configuration of the outside units. Outside units can be arranged with one on top of another, saving space for other purposes.

4.Floor by floor renovation without disturbing other tenants

Based on the actual situation, renovation work can be carried out in phases, lot by lot and floor by floor. This truly and properly gives expression to the outstanding flexibility of the water cooled VRV IV W series.

5.Compact refrigerant pipes and VRV indoor units help to save ceiling space

The outside units and indoor units of the water cooled VRV IV W series are connected by refrigerant pipes. As the VRV indoor units and the diameter of refrigerant pipes are significantly smaller than duct and water pipes, less ceiling space is occupied and more floor height is saved. Less work is needed for expansion and renovation of the air conditioning system, thus minimizing the influence on other tenants.

Individual air conditioning comfort can be realized when and where it is actually required.


1 Independent control provides greater comfort and convenience

Each indoor unit of the water cooled VRV IV W series can be independently controlled and adjusted according to each tenant's individual needs for temperature and air volume.

This achieves optimal comfort and convenience.

2 Higher efficiency with partial load

In actual operation, an air conditioning system's load may vary due to external climate change or variation of indoor unit operation rate, making the air conditioning system work in a partial load operation most of the time. By virtue of Daikin's advanced DC inverter technology and advanced refrigerant control technology, the water cooled VRV IV W series boasts a higher efficiency in a partial load state than in the rated operating conditions.

Large meeting room: OFF

Meeting room


3 Flexibly satisfies conditions for working overtime and times of insufficie

When teaming up with a conventional central air conditioning system, the water cooled VRV IV W series can easily handle the air conditioning needs for working after-hours while the building’s central air conditioner can be utilized during normal work hours. The water cooled VRV IV W series can be added according to actual needs.

  • Inconvenient transportation procedures are eliminated, and the tenants’ daily air conditioning costs decrease.
  • Based on actual schedules, operation for each indoor unit can be precisely and individually set.

4 Connection using refrigerant pipes eliminate the risk of water leakage

The outside units and indoor units of the water cooled VRV IV W series are connected by refrigerant pipes, with water pipes centralised in the outside unit room and the pipe well. This arrangement greatly reduces the risk of damage on important equipment indoors caused by water leakage of the system. General manager office: 27°C, low air volume

Easy Installation

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 146 kg and height of 1,000 mm make it possible for installation in buildings with limited space, or where space is unavailable for outdoor units. This makes the system ideal for places that doesn’t have area outside—such as underground malls.

* The unit is designed for indoor installation only.

Enhanced usability

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.

Enhanced lineup

Wider capacity range from 6 to 36 HP

With its enhanced lineup of 2 new models-6 HP and 12 HP single outside units, VRV IV W series offers a wider capacity range from 6 HP to 36 HP to meet broad variety of needs.

Energy saving

Higher Coefficient of Performance (COP)

With its enhanced lineup of 2 new models-6 HP and 12 HP single outside units, VRV IV W series offers a wider capacity range from 6 HP to 36 HP to meet broad variety of needs.

State-of-the-art energy saving technology

Customise your VRV system for optimal annual efficiency

The new VRV IV W series now features VRT technology. VRT automatically adjusts refrigerant temperature to individual building and climate requirement, thus further improving annual energy efficiency and maintaining comfort. With this excellent technology, running costs are reduced.

How is energy reduced?

During cooling, the refrigerant evaporating temperature (Te) is raised to minimise the difference with the condensing temperature. Compressors work less, and this reduces power consumption.

Typical changes in evaporating temperature and COP depending on changing indoor load

Required capacity changes as air conditioning load changes according to outdoor temperature.



In case of fixed evaporating temperature, excessive cooling, thermo on-off loss, and other inefficiencies occur.

Automatic control adjusts evaporating temperature to heat load change.

Energy efficiency is improved without sacrificing comfort.

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 IV W series and indoor units are possible. Water piping does not enter occupied spaces, so there is little chance of water leaking.

High efficiency compressor to achieve a high COP

Compressor equipped with Reluctance DC motor

Daikin DC inverter models are equipped with the Reluctance DC motor for compressor. The Reluctance DC motor uses 2 different types of torque, neodymium magnet*1 and reluctance torque*2. This motor can save energy because it generates more power with a smaller electric power than an AC or conventional DC motor.

Note: Data are based on studies conducted under controlled conditions at a Daikin laboratory using Daikin products.

*1 A neodymium magnet is approximately 10 times stronger than a standard ferrite magnet.

*2 The torque created by the change in power between the iron and magnet parts.

Use of an optimised sine wave smoothes motor rotation, further improving operating efficiency.

Smooth sine wave DC inverter

Sucked gas is compressed in the scrolling part before the heated motor, so that the machine compress the non-expanded gas, resulting in high efficiency compression.

Scroll compressor

Advanced control main PC board

SMT* packaging technology

  • SMT packaging technology adopted by the whole computer control panel improves the anti-clutter performance.
  • Protects your computer boards from the adverse effect of sandy and humid weather.

Minimize performance degradation from refrigeration oil in all stages of operation

Newly designed oil receiver

Adding a container vessel (Oil Receiver) helps eliminate performance degradation by retaining refrigeration oil and preventing excessive oil from flowing to the heat exchanger.

The new design enables the oil receiver to automatically supply the compressor with only the necessary amount of oil.

Simplified commissioning and after-sales service

Function of information display by luminous digital tube

VRV IV W series utilises 7-segment luminous digital tubes to display system operation information, enabling the operational state to be visually displayed whilst facilitating simplified commissioning and after-sales service.

Outside unit sequencing technology

Automatic sequencing operation

During start-up, Daikin VRV IV W series outside unit sequencing operation will be automatically enabled to ensure balanced operation of each outdoor unit to improve longevity of equipment and stable operation.

Reliable and convenient air conditioning system

Auto-restart technology after power interruption

Whether the indoor or outside unit accidentally experiences a power interruption during normal operation or not, the system will keep a record of the operating mode adopted before the power interruption. When the power supply recovers, the air conditioning system will then restore itself back into the recorded operating status, simplifying the operation after an accidental power interruption.

Refrigerant pressure detection technology makes system operation more stable and efficient

Quick and accurate detection of refrigerant status is crucial to the stable and efficient operation of the system. The water cooled VRV IV W series not only utilizes temperature sensors to detect the system's operating status, but also employs high and low pressure sensors to carry out a quick, comprehensive and accurate detection of the refrigerant status, ensuring more stable and efficient operation.

More stable operation

  • Low pressure protection: the system can effectively protect the compressor from being affected by instantaneous low pressure changes through monitoring the pressure data of the air suction pipe. Compared with the conventional low pressure protection method featuring temperature sensors, the pressure-sensor method boasts quicker response and can better reflect the system's instantaneous operating status.
  • High pressure protection: the system can also keep the compressor from being affected by instantaneous high pressure changes.

More efficient operation

  • A low pressure sensor, together with advanced supercooling technologies and high pressure protection control, helps to realize fast starting of the compressor, and can also quickly adjust rotational speed according to refrigerant status to adjust to indoor load fluctuations more rapidly.

Outside Unit Combinations

For connection of only VRV indoor units

*1. An outside unit multi connection piping kit (option) is necessary for multiple connections of 14 HP systems and above. *2. Total capacity index of connectable indoor units must be 50%–130% of the capacity index of the outside units.

For connection of only residential indoor units

*1. Only single outside unit (RWEYQ6-12T) can be connected.

*2. Total capacity index of connectable indoor units must be 50%–130% of the capacity index of the outside unit.

Enhanced range of choices

Indoor units can be selected from 2 lineups, both VRV and residential indoor units, to match rooms and preferences.

VRV indoor units

Residential indoor units with connection to BP units

Note: BP units are necessary for residential indoor units. Only single outside unit (RWEYQ6-12T) can be connected.

VRV IV W Series Outside Units