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Air-cooled cooling system (standard and inverter)
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Air-cooled cooling system (standard and inverter) – Hitachi Global Life Solutions Inc.

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Improved rated cooling COP for all models.

High energy-saving performance is realized through improved performance at low load operation.
In addition, module control function is standard.

Product Features
Hitachi’s new technology achieves high rated cooling COP*1
Rated cooling COP has been improved in all models by installing high-efficiency inverter scroll compressors and improving the refrigeration cycle and water-side heat exchanger.

*1 Air dry bulb temperature at air side heat exchanger inlet: 35°C, chilled water inlet temperature: 12°C, chilled water outlet temperature: 7°C. Based on JRA 4066:2014 “Water Chilling Unit.

Dramatic Reduction of Annual Energy Consumption by Improved Performance in Low-Load Operation
■Technology to improve performance during low-load operation
Heat exchanger (Type 375 and 500)

Low-load performance-enhancing path structure
A heat exchanger path structure is employed to maximize heat exchanger performance during low-load operation. The heat exchanger is divided into upper and lower sections, and the flow path is narrowed as it moves downstream of the heat exchanger to raise the refrigerant flow velocity and improve the heat transfer coefficient. Cooling capacity is increased and energy efficiency is improved.

Sigma (Σ) shaped heat exchanger
The two-fan structure is designed to improve efficiency during low-load operation. The Σ (sigma) shaped heat exchanger is adopted to maximize the effect of this two-fan structure and to improve heat exchanger performance.

Bellmouth (190” and larger)
Long bellmouth structure
The multi-stage enlarged structure significantly reduces fan input by smoothing the airflow. Furthermore, the long bellmouth suppresses air leakage and achieves high efficiency over a wide operating range.

Compressor (Model 190 and above)
Improved low-load operating efficiency
The oil supply distribution system for the compressor mechanism has been improved (optimization of oil supply volume) to suppress excessive oil and improve efficiency in the high-speed rotation range.

Dramatic reduction in annual power consumption compared to conventional models

Module control functions that can be used for various local systems are provided as standard.
Controls up to 8 modules per group (maximum cooling capacity of 400 kW)
Module control function is standard. No dedicated controller for controlling the number of modules is required.
(Remote operation command input is required.)

(Remote operation command input is required.)
* Use the same capacity combination for volume control.

Main Control Specifications
Number control function
Operates with the number of units appropriate for the load.

Rotation function
Monitors the operation time of each module and rotates the modules according to the operation time.

Operation at abnormal shutdown
Avoids the risk of complete shutdown. The module that has stopped abnormally is disconnected from the control system, and operation is continued with the normal module.

Elevator loading, installation, and ease of installation are taken into consideration
■Carry-in by elevator*1 is possible
The 11-person elevator can be used for delivery. (except Model 500)

*1 Elevator (11-seater): JIS A 4301-1983

Built-in Active Filter for Harmonics (for modification) (except Models 75 and 125)
A built-in active filter that can be installed inside the chiller unit is available for harmonics. (Shipped with the unit built-in.) * Available for 200V class only (400V class only)

Only 200V class is available (400V class is not available).

Expanded Capacity Control Range for Standard Specifications
The basic configuration of the refrigeration cycle has been reviewed to expand the capacity control range for standard specifications. This enables chilled water to be supplied at a more stable outlet water temperature even under low loads.

Lower limit of capacity control range for standard specifications

*Conventional models: Products released until March 2017.

Equipped with demand functions as standard
Up to 5 functions can be selected from 9 functions: current demand / forced thermo OFF / maximum load limit / forced full load / 2 temperature switching / night shift / blower forced operation / external set temperature / pump forced operation. It can also be used as a self-demand function to save power.

*Optional parts (connector kit: CCK-1) are required.

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Hitachi Global Life Solutions, Inc.
Hitachi Global Life Solutions, Inc.

More smiles to life for one and all.
A more comfortable tomorrow for people and society.
With innovations that deliver happiness to the world,
we open new doors to the future.

Leading the field in home appliances and air conditioners for the digital age, and delivering solutions to support and enrich the lives of people around the world: Hitachi GLS is a lifestyle solution company that seeks to listen carefully to customers and resolve their lifestyle issues.
Hitachi Global Life Solutions, Inc. (“Hitachi GLS”) was created on April 1, 2019, through the merger of Hitachi Consumer Marketing, Inc. and Hitachi Appliances, Inc., with the aim of delivering valuable products and services to customers, through the integration of value chain processes, from product planning to design, manufacturing, sales and after-sales services.

Working under the slogan of “360-degrees of happiness: a happy life for each and every customer,” we seek to gain a closer understanding of customer lifestyles. By delivering well-designed functional products and sophisticated solutions to resolve individual customer lifestyle issues, through the utilization of the Hitachi Group’s value chain and digital technologies, we aspire to be a company that contributes to increasing the quality of life for customers around the world

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