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Hitachi-Johnson Controls Air Conditioning Inc.
Samurai Range Screw Type Water Chillers

Samurai Range Screw Type Water Chillers

Product catalog summary

Company Profile
Hitachi is a global leader in air conditioning technology, known for its innovation and commitment to environmental responsibility. The company employs over 347,424 people and invests heavily in R&D, leading to advancements such as scroll and semi-hermetic screw compressors. Hitachi's manufacturing facility in Barcelona, Spain, supports its European market.

Product Range Overview
The Samurai range includes air-cooled and water-cooled chillers with capacities from 106kW to 1030kW. These chillers feature Hitachi's twin screw compressors and advanced electronic control systems for precise modulation capacity control, maintaining outlet water temperature within +/- 0.5 degrees.

Features and Benefits

Continuous Capacity Control: Ensures precise control of outlet water temperature, reducing operational costs by providing only the necessary energy for the load.
Low Noise and Vibration: Advanced compressor technology and sound insulation reduce noise, minimizing the need for additional noise attenuation measures.
Excellent Partial Load Performance: High efficiency at partial loads offers competitive energy savings.
Ideal Starting System: The STAR-DELTA starting system reduces peak electrical currents, minimizing the need for oversized electrical wiring.

Technical Specifications
The Samurai range is designed for both cooling-only and heat pump applications, with detailed specifications for various models, including cooling capacities and optional heating functions.

Options and Accessories
Customizable options include low noise configurations and copper fins upon request.

Quality Process and Maintenance
Hitachi emphasizes quality in manufacturing and maintenance, ensuring long-term reliability and performance. The company is ISO 9002 and ISO 14001 certified.

Key Features

Power Efficiency: High power factor, typically exceeding 0.9 at full load, reduces the need for additional capacitors.
Electronic Expansion Valve: Enhances control under varying temperature conditions and reduces electrical power consumption.
Compact Design: Stainless steel plate heat exchanger allows for a more compact design, minimizing installation space requirements.
Refrigerant Efficiency: Requires the lowest refrigerant charge on the market, leading to lower operating costs.

Installation and Space Requirements

High cooling capacity per square meter makes them suitable for installations with limited space.
Optimized service access reduces space required for maintenance operations.

Technical Specifications

Cooling Capacity: Ranges from 112 kW to 1030 kW, depending on the model.
Dimensions: Height is consistently 2,430 mm, with varying width and depth.
Compressor Type: Semi-Hermetic Screw Type with continuous capacity control.
Refrigerant Type: R407C, with electrical expansion valve for flow control.
Sound Levels: Sound power levels range from 82 dB to 94 dB, with sound pressure levels from 64 dB(A) to 72 dB(A).

Safety and Protection
Equipped with safety devices including reverse phase protection, fuses, thermal relays, and high/low pressure controls.

Performance Standards
Cooling capacity, input power, flow rate, and water pressure drop are calculated according to EN12055 for standard conditions.

Technical Specifications and Features
Includes components like relays, thermostats, oil heaters, control circuit fuses, pressure switches, and temperature controls. Cooling and heating capacities are calculated according to EN12055 standards.

Compressor Details
Semi-hermetic screw compressors designed for refrigerants R22 and R407C, featuring a bipolar electric motor, solenoid valves for capacity control, and electronic protection against high temperatures.

Heat Exchangers
Innovative plate heat exchangers made from AISI-316 stainless steel enhance efficiency and reduce refrigerant volume.

Control Systems
Microprocessor control system adjusts compressor capacity and monitors operational parameters, with remote monitoring and control capabilities.

Options and Accessories
Includes low noise configurations, low water temperature settings, and enhanced corrosion protection.

Installation and Maintenance
Pre-charged with refrigerant, requiring only electrical and hydraulic connections on-site. Enhanced maintenance access options are available.

Flow Switch Installation
Evaluates flow circulating through the installation, similar to a differential pressure switch.

Water Cooler Trace Heater
Activates below 2ºC to prevent evaporator freezing in cold climates.

Common Water Pipe
Allows for a single inlet and outlet connection for multiple plate heat exchanger units.

Witness Test
Customers can witness factory tests of their units, verifying various operational aspects.

Foundation Rubber Anti-Vibration Mounts
Reduce vibration transmission to the structure.

Operating Space
Design allows easy access to components for maintenance checks.

Compressor Options
Optional extras like suction and discharge valves facilitate servicing.

Easy Handling
Simplified electronic control system with LED displays and selection buttons.

Commercial Test
Units undergo tests simulating actual conditions.

Programming Flexibility
Easily configurable for various installations with simple micro-switch programming.

Services
Hitachi provides a network of distributors, training courses, and technical documentation to support customers.

Note
Specifications are subject to change without notice to incorporate the latest innovations.

All Hitachi-Johnson Controls Air Conditioning Inc. catalogs and technical brochures

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

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