VRV A
Achieves space saving & excellent performance to meet the needs in various buildings
The new VRV A series achieves high efficiency in a design that is more compact and lightweight. It also offers comfort, easy installation, and high reliability to meet the needs in various buildings.
RXQ-A
Lineup
Saves Space and Delivers Excellent Performance
*Greater energy savings during low-load operation
The key to innovative energy savings is to increase efficiency during low-load operation.
Using data gathered from actual operation, Daikin discovered that air conditioning systems operate at a load factor of 50% or less for 80% of their annual operation period.
This inspired us to develop new technologies to enhance energy efficiency during low-load operation.
Utilising these technologies, Daikin’s new VRV A series raises the standard of energy efficiency.
*Advanced technologies for greater energy savings
By uniting advanced software and hardware technologies for greater energy savings during actual operation and combining the technologies of VRV, VRT and VAV, we have attained both energy savings and comfortable air conditioning.
VRT Smart Control (Fully Automatic Energy-saving Refrigerant Control)
Optimally supply only for the needed capacity of indoor units
Daikin developed VRT smart control by combining air volume control (VAV: Variable Air Volume) for indoor units with conventional VRT control, which optimises compressor speed by calculating the required load for the entire system and optimal target refrigerant temperature based on data sent from each indoor unit. Coordination with the air volume control reduces compressor load and minimises operation loss based on detailed control. VRT smart control ensures energy savings and comfortable air conditioning to meet actual operating conditions.
•Overview of the control (system control flow)
Different automatic energy-saving refrigerant control applies depending on the indoor units connected.
Note:
- For the classification of indoor units (VRT smart control and VRT control), refer to page 41–42.
- If a system has indoor units subject to both VRT smart and VRT control, the system is operated under VRT control.
- If a system has both outdoor-air processing air conditioners and outdoor-air processing type indoor units, VRT smart control and VRT control are disabled.
Optimum utilisation of VRT Smart Control and VRT Control
Effectiveness can be demonstrated for VRT Smart Control and VRT Control when all the indoor units operate under low load conditions in a similar manner. Low load conditions are the time when room temperature approaches set temperature. For this reason, please note the following to maximise energy efficiency.
- When selecting indoor units
Indoor units are installed in a system so that they operate largely under the same conditions. Energy efficiency decreases for the installation patterns shown below.
Example:
- A load imbalance occurs because an indoor unit in the same system is installed near the perimeter of the room or in the vicinity of a room entrance.
- Different operating hours for indoor units.
- Time of Use
- Energy efficiency decreases when the set temperature of a specified indoor unit is excessively lowered during cooling operation.
- The airflow rate setting is set to “Auto” during VRT Smart Control.
Achieves Space Saving & Excellent Performance
New Scroll Compressor*
Refrigerant leakage is minimised during low-load operation.
Operation loss due to refrigerant leakage is reduced by the proprietary back pressure control mechanism to ensure stable low-load operation.
Advanced oil temperature control
Standby power consumption is reduced
The advanced oil temperature control reduces standby power consumption by up to 82.7%* annually compared to conventional models. Standby power needed for preheating refrigerator oil, which consumed substantial standby power, was reduced to save energy when the air conditioner is stopped.
*Automatic refrigerant charge function
Contribute to optimised operation efficiency, higher quality and easier installation
Optimised operation efficiency
The automatic refrigerant charge function automatically determines the optimal amount of refrigerant to be charged.
This function prevents a capacity shortage or energy loss due to excessive or insufficient refrigerant.
Higher quality and easier installation
The automatic refrigerant charge function automates the charging of the proper refrigerant amount and the closing of shut-off valves by simply pressing a switch after pre-charging.
Simplified installation eliminates excessive and insufficient refrigerant charge amounts due to calculation mistakes, and this has led to higher installation quality.
VRV IV
- Calculate necessary refrigerant amount from design drawing
- Recalculate refrigerant amount from final installation drawing
- Charge refrigerant
- Regularly check refrigerant weight on weighing scale
- Complete by manually closing valves when proper weight is reached
*High reliability
New inverter PC board
The control functions of inverter technology have been integrated on printed circuit boards. As well as improving reliability, this has reduced the number of parts and enabled downsizing.
- New waveform control improves tolerance of variations in power supply voltage. Even if the power supply has irregularities, rises in current are suppressed and operation continues.
- Durability of the inverter printed circuit board improved by changing the electrolytic capacitors for the compressor to film capacitors.
Excellent Operational Performance
*Comfort
Low operation sound
High efficiency heat exchanger helps to achieve low operation sound.
Large airflow, high static pressure and quiet technology
Advanced analytic technologies are utilised to optimise fan design and increase airflow rate and high external static pressure.
Nighttime quiet operation function
For areas with stringent restrictions placed on outdoor sound levels, the outdoor unit can be set for low operation sound during the nighttime to meet sound restrictions.
The automatic night quiet mode will initiate 8 hours*1 after the peak temperature is reached in the daytime, and normal operation will resume 9 hours*2 after that
*1. Initial setting is 8 hours. Can be selected from 6, 8 and 10 hours.
*2. Initial setting is 9 hours. Can be selected from 8, 9 and 10 hours.
*3. In case of 10 HP outdoor unit.
Note:
- The night quiet mode lowers operating sound by reducing capacity. This function is available in setting at site.
- The operating sound in quiet operation mode is the actual value measured by our company. Because priority is given to protection mode,such as for oil recovery, the operating sound may become higher temporarily.
- The relationship of outdoor temperature (load) and time shown above is just an example.
*Compact design with high performance
Highly integrated heat exchanger
The unique 4-sided all round heat exchanger ensures sufficient surface area for the heat exchanger.
This improves the heat exchanger performance without increasing the footprint.
Waffle Fin
A waffled-shaped fin with fin pitch of 1.4 mm was adopted to realise sufficient heat exchanger area for optimum unit efficiency.
4-sided heat exchanger
High efficiency heat exchanger is realised by reducing airflow resistance with adoption of small cooling tubes with a diameter of Ф7.
Optimised inner design to ensure smooth airflow
Electric components were downsized and positioned in the dead space of the bell mouth side to decrease airflow resistance.
Easy maintenance
The electrical components are strategically located on the top which eases the maintenance process.
Moreover, the heat exchanger on the front side can be used effectively to improve its performance.
Sufficient cooling for
electrical components
The VRV A series is designed with the electrical box strategically positioned between a region of positive and negative pressure. This design allows large airflow from negative pressure to positive pressure due to the high pressure difference.
- High pressure since air enters near the fan blower inlet
Eliminate suction resistance issue
Without affecting the fan volume, the electric components are designed to be at the top and this ulitises dead space. This eliminates the problem of suction resistance.
High reliability at high ambient temperatures
It is possible to keep operation stable even at high ambient temperatures by cooling the inverter power module. This helps maintain air-conditioning capacity and reduces failure ratio.
Outer Rotor DC Motor (ODM)
Only Daikin has adapted an ODM with the feature of stable rotation and volumetric efficiency.
Thanks to the large diameter of the rotor,
- Large torque with same electromagnetic force
- Stable rotation in all ranges and can be operated with small number of rotations
Flexible System Design
*More options for installation location
Long piping length
The long piping length provides more design flexibility, which can match even large-sized buildings.
1. If the piping length between the first indoor branch and BP unit or VRV indoor unit is over 20 m, it is necessary to increase the gas and liquid piping size between the first indoor branch and BP unit or VRV indoor unit. If the piping diameter of the sized up piping exceeds the diameter of the piping before the first indoor branch kit, then the latter also requires a liquid piping and gas piping size up. Please refer to Engineering Data Book for details.
*When a mixed combination of VRV and residential indoor units is connected or when only residential indoor units are connected, connection ratio must be 50% to 130%. Refer to page 40 for outdoor unit combination details.
High external static pressure
VRV A series outdoor unit has been achieved high external static pressure up to 78.4 Pa, ensuring the efficient heat dissipation and stable operation of equipment in either hierarchical or intensive arrangement.
Reliable and Stable System
*More accurate test operation and stable system
Efficient automatic test operation
Daikin VRV A series incorporates a simplified and efficient test operation function, that not only greatly accelerates the installation process, but also effectively improves the field setting quality.
- Automatically checks the wiring between outdoor units and indoor units to confirm whether there is defective wiring.
- Confirms piping length to optimise operation.
- Automatically checks whether the stop valve in each outdoor unit is functioning normally to ensure the smooth operation of air conditioning system.
*Simplified commissioning and after-sales service
Function of information display by luminous digital tube
VRV A 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.
*Advanced control main PC board
SMT* packaging technology
- SMT packaging technology adopted by the computer control panel improves the anti-clutter performance.
- Protects your computer boards from the adverse effects of sandy climates and humid weather.
*I-demand function
Limit to power consumption can be set precisely to one of 11 levels. Peak power cut-off can be accomplished according to each user situation.
*Set on the circuit board of the outdoor unit.
*Wide operation temperature range up to 49°C
The versatile operation range of the VRV A series works to reduce limitations on installation locations. The operation temperature range for cooling can be performed with outdoor 30 temperatures as high as 49 ̊C. This enables reliable operation even under high temperature conditions.
Note:
When outdoor temperature falls below 10°C, the thermostat shuts OFF, the outdoor unit stops, and operation switches from cooling to fan operation.
*Automatic sequencing operation
During start-up, Daikin VRV A series outdoor unit sequencing operation will be automatically enabled to ensure balance operation of each outdoor unit to improve longevity of equipment and operation stability.
*Double backup operation functions
Daikin VRV A series outdoor unit boasts double backup operation functions, which can secure the use of air conditioners in this area to the greatest extent in an emergency by enabling double backup operation functions even if failure occurs in a set of air conditioning equipment.
In the event of a failure, emergency operation can be conveniently enabled to allow the remaining system to operate in a limited fashion.
Unit backup operation function
If one of the units in a multiple outdoor system malfunctions, the other outdoor units provide emergency operation until repairs can be made.
* For systems composed of two or more outdoor units.
Compressor backup operation function
The outdoor unit is equipped with two compressors. Even if one compressor malfunctions, the other compressor provides emergency operation, reducing the risk of air conditioning shutdown due to compressor failure. (Capacity is saved during backup operation.)
* For single outdoor unit system RXQ16-20AYM models. On-site settings are required using the printed circuit board of the outdoor unit.
*Ease of Maintenance
VRV A series provides a maintenance feature* which allows the shutdown of indoor unit without shutting down the whole VRV system. This feature comes in handy during maintenance period as the remaining indoor units continue to operate.
*Field setting is required.
This feature does not apply to residential indoor unit connection. For more information, please contact Daikin sales office.
Outdoor Unit Lineup
*VRV A Series Outdoor Units
The outdoor unit capacity is up to 60 HP (168 kW) in increment of 2 HP.
- VRV A series outdoor unit offers a high capacity of up to 60 HP, responding to the needs of large-sized building.
- The single outdoor unit has only 2 different shapes and dimensions, not only simplifying the design process, but also bringing the system flexibility to a new level.
- With the outdoor unit capacity increased in increment of 2 HP, customers' needs can be precisely met.
*Outdoor Unit Combinations
For connection of VRV indoor units only
Note:
- *1. For multiple connection, the outdoor unit multi connection piping kit (separately sold) is required.
- *2. Values inside brackets are based on connection of indoor units rated at maximum capacity, 200% for single outdoor units, 160% for double outdoor units, and 130% for triple outdoor units. Refer to page 35 for notes on connection capacity of indoor units.
For mixed combination of VRV and residential indoor units or connection of residential indoor units only
Note:
- *1. Only single outdoor unit (RXQ6-20AY14) can be connected.
- *2. Total capacity index of connectable indoor units must be 50%–130% of the capacity index of the outdoor unit.
Indoor Unit Lineup
*Enhanced range of choices
A mixed combination of VRV indoor units and residential indoor units is enabled all in one system, opening the door to stylish and quiet indoor units
SPESIFICATIONS
