Enhancing energy-saving performance and work flexibility New release of modular type multi air conditioning system for buildings "AIRSTAGE" VR-II (cooling and heating simultaneous operation type) for overseas market (5 outdoor unit models・34 combinations/55 indoor unit models)

Our company will release modular-type multi air conditioning system for buildings "AIRSTAGE" VR-II series (14/16 HP, cooling and heating simultaneous operation type) realizing industry's top class^(*1) energy consumption efficiency COP4.13 (14HP at heating operation) and enhancing work flexibility for Europe and Australia from December 20. The 8/10/12 HP models of the same series have already been released from October for Europe and Australia and the "AIRSTAGE" VR-II lineup is strengthened by adding 2 outdoor units this time.

In recent years, as the regulations of energy conservation are more and more tightened due to the energy conservation policy of various countries of the world, the high energy saving performance is required for the commercial use air conditioning system which accounts for large part of power consumption at stores and offices.

Also, the good installation efficiency dealing with the buildings of various structure is an important factor.

The new series realized the industry's top class^(*1) consumption efficiency COP4.13 (14HP at heating operation) by newly developed "Upper and lower individual refrigerant control" and "Distributed operation control" enhancing the efficiency of heat exchanger in addition to the energy-saving technology such as "Round-corner type high density multi-path heat exchanger" and "Sine wave DC inverter control". By adding the newly released 14/16HP models, this series will be the leading edge air conditioning system for buildings having 8 to 48HP capacity combining maximum 3 outdoor units and maximum 64 indoor units. Furthermore, the switching between cooling and heating can be freely made proving the optimum air conditioning adapting to the room environment.

Also, the "cooling and heating switching unit" by which individual type or collective type can be selected depending on the installation site was developed for allowing for the installation even at the narrow space under the roof and enhancing the flexibility of work.

In the actual aspect of control, the "new touch panel type remote controller" adopting the useful function for energy saving was developed in addition to the conventional remote controller, and the lineup has been enriched.

We are aiming at the further expansion of air conditioner business including the business of multi air conditioning system for buildings by developing the products conforming to the energy conservation policies of various countries of the world in the future.

Main features

1. High efficiency operation realizing industry's top class^(*1) energy consumption efficiency COP4.13 (14HP at heating operation) (Cooling and heating simultaneous operation type)
2. "Cooling and heating switching unit" enhancing installation efficiency and work flexibility
3. Controller making detailed controls and central control instrument
4. Abundant product lineup corresponding to diverse buildings

1．High efficiency operation realizing industry's top class^(*1) energy consumption efficiency COP4.13 (14HP at heating operation) (Cooling and heating simultaneous operation type)

"AIRSTAGE" VR-II series (cooling and heating simultaneous operation type) realized high energy consumption efficiency by various original energy-saving technologies and at the same time, allow for further high efficient operation by the "cooling and heating simultaneous operation" utilizing exhaust heat generated during cooling operation for heating operation.

1) Realizing high efficient operation by "Round-corner type high density multi-path heat exchanger" and "Upper and lower individual refrigerant control"

In addition to the efficient "Round-corner type high density multi-path heat exchanger" (thin copper pile of Φ7mm, round-corner shape), our original operation control function is adopted to divide the heat exchanger to upper and lower parts and properly control the refrigerant volume flown into each part according to the air volume to be taken into the heat exchanger, by which the maximum performance of the heat exchanger is secured and the high efficient operation is realized.

2) "Distributed operation control" fully utilizing heat exchanger of each outdoor unit

The heat exchange efficiency is substantially enhanced by "Distributed operation control" function making full use of the heat exchanger of each outdoor unit according to the required capacity from indoor unit. The compressor can maintain the most efficient and stable operation without operating by the maximum load. Also, the reliability of the equipment is enhanced as the operation is not concentrated on one outdoor unit.

3) Realizing high efficiency of refrigerant circuit by adopting large capacity (16HP) DC twin rotary compressor

The operation is integrated into one compressor by adopting DC inverter control of sine wave driving system with less rotation loss and the newly developed 16HP twin rotary compressor.

The capacity loss is reduced compared with the conventional way of combining two compressors and the efficiency is enhanced.

2．"Cooling and heating switching unit" enhancing installation efficiency and work flexibility

In the "AIRSTAGE" VR-II series (cooling and heating simultaneous operation type), the installation efficiency and work flexibility are enhanced by the outdoor unit adopting the newly developed cooling and heating switching unit" and "corner cut air intake structure"

1) "Cooling and heating switching unit" to be selected according to installation site

i.  "Individual type" to be installed easily even in the narrow space

The height of the unit is suppressed so as to be installed even in the narrow space under the roof. Control boxes are installed on the right and left sides to enhance the installation efficiency.

ii.  "Collective type" to be worked simply with less pipe connection points

4 "Individual type" units are collected into one case and the pipes are connected inside beforehand. The pipe welding points at the work site are substantially reduced and the installation space is also reduced compared with lining 4 "Individual type" units so that the space of the building can be utilized efficiently.

2) Other features (common with conventional V-II type)

1. Outdoor unit with installation space saving design adopting "Corner cut air intake structure"
2. Enhancing work flexibility by adopting long piping designing up to 1,000m total pipe length
3. Easy installation in each floor of high-rise building and balcony by the outdoor unit of external static pressure 80Pa

3．Controller making detailed controls and central control instrument

1) "New touch panel type remote controller" enhancing operation easiness significantly by newly adopting energy-saving function

i.  Enhancing operation easiness significantly by adopting touch panel

The screen can be switched by one touch and the required operation can be made easily.

ii.  Further strengthening the energy-saving function

Such functions are added as function to prevent excessive cooling or heating by suppressing the range of indoor temperature to be set beforehand and function to eliminate the useless operation by the "timer to prevent failure to turn off".

As for the "timer to prevent failure to turn off", the time to operate the timer can be set. As one example, such detailed control is possible as "operation continues during regular work hours and operation turns off automatically after certain time from the start of operation during over time work hours.

iii.  Display by various languages

Display can be made by 7 languages of English, Chinese, French, German, Spanish, Polish and Russian

2) Lineup of other individual remote controllers

Wireless remote controller

Simple wired remote controller

Wired remote controller with weekly function

3) Diverse central control systems adapting to control scale

Central control systems

Controlling 64 indoor units

Group remote controller

Controlling 100 indoor units

Central remote controller

Controlling 400 indoor units

Touch panel type controller

Controlling 1,600 indoor units

System controller(Software)

4．Product lineup corresponding to customers' request

The lineup of outdoor units was developed for 8HP models up to 48HP in 2HP increments. The selection is available from variation of total 34 models comprising 21 models of space saving combination and 13 models of energy saving combination.

Also, total 55 models of 13 types of indoor units from 2.2kW to 25.0kW are prepared.

Product line-up of outdoor unit models

Capacity range	8HP	10HP	12HP	14HP	16HP	18HP	20HP	22HP	24HP	26HP	28HP	30HP	32HP	34HP	36HP	38HP	40HP	42HP	44HP	46HP	48HP
Priority on space saving
Priority on energy saving

Product line-up of indoor unit models

Capacity range（1,000Btu）		7 【2.2kW】	9 【2.8kW】	12 【3.6kW】	14 【4.5kW】	18 【5.6kW】	24 【7.1kW】	30 【9.0kW】	36 【11.2kW】	45 【12.5kW】	54 【14.0kW】	60 【18.0kW】	72 【22.4kW】	90 【25.0kW】
	Small-size cassette
	Large-size cassette
	Compact Ducted
	Slim ducted (with drain hose)
	Mid static pressure duct
	High static pressure duct
	Ceiling / Floor
	Large ceiling
	Small-size wall-mounted(*2)
	Large-size wall-mounted

Main specifications/Time of release/Production quantity

Main specifications of outdoor units

Production quantity

Production quantity (FY2013) 5,000 units (outdoor units including all models)

Note

*1 realizing industry's top class :

As of November 21, 2012 and according to our company's survey. (in multi air conditioning system for buildings)

*2 Small-size wall-mounted :

Small-size wall mounted model has 2 types, normal and low-noise.

* "AIRSTAGE" is our registered trade mark.

Larger View

• "AIRSTAGE" VR-II Series（JPEG : 414KB）

Contact details

• Public Relations Division