Key Features

Core Technologies

• Common Technologies

27-Step Fan Speed Control

The use of DC variable-speed motor results in increased efficiency and power input reduction. With Kyosho Series, the outdoor fan speed can be adjusted in 27 steps.

• The stability of discharge pressure and suction pressure of compressor is assured.
• The stability of dynamic flow (capacity) allocation of indoor unit is assured.
• Quick response of control system is improved, accordingly the system’s stability, durability and reliability are assured.

Energy Efficiency Ratio

Wide Working Range

NOTES.

• When ambient temperature is high, be careful about short circuit
• For comfortable operating, perform maintenance of the heat exchanger of Outdoor Unit

Advanced Technologies

Hitachi’s Kyosho Series comes with some unique advantages and technologies.

Rotational Operation*1 to Distribute Load of Outdoor Units

Regulating the operation time of each outdoor unit leads to load reduction on compressors.*2During multiple unit operation, the same rotation frequency of inverter compressor results in an equivalent load on each compressor. Therefore, outdoor unit endurance is improved.

NOTES:

• At least 2 outdoor units are required for this function.
• Comparison between rotation operation function and non-rotation operation function based on the same system.

Backup Operation Function for Emergency

The Backup Operation Function prevents the system from coming to a complete stop when outdoor unit failure occurs.*1 Emergency operation starts with the remote control switch after an alarm.*3

NOTES:

• A minimum of 2 outdoor units are required for this function.
• Emergency Operation can be performed within 8 hours, after switching the unit off. Post 8 hours from time of switch off the  Emergency Operation shall fail to launch.
• Emergency Operation shall be launched into action through a specified alarm code. Refer to “Alarm Code for Emergency Operation”.

Flexibility in Refrigerant Pipe Work

Improved flexibility of design by increasing the total pipe length up to 1,000 m.

• For 100m or more, the pipe diameter will be one size larger.
• There are restrictions for connectable indoor units and refrigerant amount.Please refer to technical manual for details.
• In case the outdoor unit is installed at a higher level than indoor units. If the outdoor unit is installed lower than indoor units, the maximum height difference is 40 m.
• In case the outdoor unit is installed at a higher level than indoor units, and only when it is a base unit.

Flexibility of Facility Design

Connectable upto 64 Indoor Units Max.

The number of connectable indoor units per refrigeration cycle can go up to 64. By use of this feature, optimal comfort can be provided to modern buildings which requires large number of indoor units.

Flexibility of installation: Kyosho series

Compact and Light Design

Transportation and Handling using Elevator

The elevator can be used to transport the base unit separately. Even the Largest Basic Unit (18 HP Model) Can Be Carried in an Elevator.

Ease of Installation

Additional refrigerant piping outlet is provided on the right bottom side of the front cover in addition to the three directions (front, rear or bottom) from the bottom base.This facilitates an easy and clear installation of the piping from multiple outdoor units.

A new piping outlet is provided on the lower right side of the front cover and so the piping connection kit can be installed at the lower position. This makes an easy and clear installation of the piping from multiple outdoor units possible.