HITACHI RAS Series Inverter Driven Air Conditioners Installation Guide

RAS Series Inverter Driven Air Conditioners

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Specifications:

• Models: RAS-080CNCCLW to RAS-300CNCCLW
• Production Location: Wuhu, China
• Refrigerant Type: R410A
• Voltage: 380-415 V 50 Hz / 380 V 60 Hz
• Cooling Capacity: 8HP to 30HP

Product Usage Instructions:

Installation:

1. Carefully read the installation & maintenance manual
before proceeding with the installation.

2. Ensure the air conditioner is placed within the specified
temperature range for optimal performance.

3. Verify the model number and electrical characteristics match
the purchase order.

4. If there are any issues during installation, contact your
local agent or contractor for assistance.

Maintenance:

1. Regularly inspect the outdoor unit for any damages or debris
that may obstruct airflow.

2. Clean the air filters periodically to ensure efficient
operation.

3. Schedule professional maintenance checks at least once a year
to keep the unit in optimal condition.

Operation:

1. Use the air conditioner within the specified temperature
range for cooling operation.

2. Avoid placing objects near the air outlet to prevent damage
due to condensation.

3. Pay attention to the direction of the outlet air for proper
airflow.

FAQ:

Q: What should I do if I notice a decrease in cooling

performance?

A: Check and clean the air filters, ensure the outdoor unit is
free from obstructions, and verify the temperature settings are
correct.

Q: Can I perform maintenance tasks myself?

A: While basic tasks like cleaning filters can be done by the
user, it is recommended to schedule professional maintenance checks
annually to ensure proper functioning of the unit.

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INSTALLATION & MAINTENANCE MANUAL
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INVERTER-DRIVEN
AIR CONDITIONERS Max SERIES
OUTDOOR UNITS
MODELS COOLING ONLY
(Standard Type)
RAS-080CNCCLW TO RAS-300CNCCLW

EN INSTALLATION & MAINTENANCE MANUAL Original Instructions

Scan the code to get the electronic manual.

A16381N3TL

Models

Applicable Models

HP

Cooling Only

HP

Cooling Only

8HP RAS-080CNCCLW 20HP RAS-200CNCCLW

10HP RAS-100CNCCLW 22HP RAS-220CNCCLW

12HP RAS-120CNCCLW 24HP RAS-240CNCCLW

14HP RAS-140CNCCLW 26HP RAS-260CNCCLW

16HP RAS-160CNCCLW 28HP RAS-280CNCCLW

18HP RAS-180CNCCLW 30HP RAS-300CNCCLW

Unit Nomenclature RAS – 080 C N C C L W

Nomenclature Description

W

Production Location: Wuhu, China

L

L: 3N~ 380-415 V 50 Hz / 4 Wires 3N~ 380 V 60 Hz / 4 Wires

C

C: “C” Series (Standard Type)

C 3rd Generation

N Refrigerant Type: R410A

C

C: Cooling Only System (2 Pipes System)

080

System Capacity (e.g., 080 = 8 HP, H20 =120 HP)

RAS

Unit Type RAS: Outdoor Unit

Working Range
This air conditioner has been designed for a specific temperature range. For optimum performance and a long life, operate this unit within the range limits listed in the table.

Outdoor Air Inlet Temperature (°C DB) Continuous Operation Range Pull Down Operation Range

Temperature

DB: Dry Bulb WB: Wet Bulb
Cooling Operation

Indoor Air Inlet 15 to 23°C WB Temperature

Outdoor

10 to

Air Inlet Temperature

48 (52 *1) °C DB

i

Models
*1. The maximum operating temperature for cooling operation of the Cooling Only type is 48 °C (52 °C). The temperatures in parenthesis indicate the temporary maximum operating temperatures.
· Temporary high ambient operation is allowed depending on the installation condition.
· Do not install the unit where the ambient temperature is always high.
· If an air outlet duct is attached and set in high static mode, or an optional hood such as a snow protection hood is attached, the outdoor unit operational temperature should not exceed 48 °C.
· When the outdoor air inlet temperature is more than 48 °C during cooling operation, “intermittent operation” may be activated to prevent the unit from overloading. If the outdoor unit operates for a long time at a temperature higher than 52 °C protection control may be activated.
· If installing units in a place where the ambient temperature continuously exceeds 48 °C, the combination ratio must be lower than 130%.
· The cooling capacity deteriorates at a high ambient temperature. Select a larger capacity outdoor unit than an outdoor unit which capacity is larger than the compatible building heat load.
· When the ambient temperature is more than 48 °C during cooling operation, the noise level to increase from 5dBA to 7dBA, due to an increase in fan rotation speed.
NOTES:
· The appropriate amount (100%) of refrigerant must be charged. Excessive charging of refrigerant is forbidden.
· Units should not be installed in areas where they will be affected by direct sunlight or where a short circuit of the discharged air may occur. Installing the units in an inappropriate place may active the protection control and the alarm system. The life span of the products and part may be considerably shortened.
· Periodic maintenance (1/certain month) must be applied to the heat exchanger fin to avoid adhesion of dirt and clogging of sand to the outdoor unit heat exchanger.
· When the cooling load is low and the outdoor air inlet temperature is 10 °C DB or lower, “thermo-OFF” may be activated to prevent frost formation on the indoor unit heat exchanger. Depending on the operating condition, the outlet air temperature of the indoor unit

IMPORTANT NOTICE
may be excessively low. Pay attention to the direction of the outlet air. Do not place objects near the air outlet and under the indoor unit as they may be damaged by condensates that may form if the humidity or the latent heat load is continuously high.
· The operational range differs when connected to All Fresh Air Unit, Econofresh and other special indoor units. Refer to the Technical Catalog for more details.
IMPORTANT NOTICE
· Hitachi-Johnson Controls Air Conditioning pursues a policy of continuing improvement in design and performance in its products. As such, Hitachi- Johnson Controls Air Conditioning reserves the right to make changes at any time without prior notice.
· Hitachi-Johnson Controls Air Conditioning cannot anticipate every possible circumstance that might involve a potential hazard.
· This manual provides common descriptions, basic and advanced information to maintain and service this air conditioner which you operate as well for other models.
· The installer and system specialist must safeguard against refrigerant leakage in accordance with local codes. The following standards may be applicable, if local regulations are not available. International Organization for Standardization: (ISO 5149 or European Standard, EN 378). No part of this manual may be reproduced in any way without the expressed written consent of HitachiJohnson Controls Air Conditioning.
· This air conditioner is designed for standard air conditioning applications only. Do NOT use this unit for anything other than the purposes for which it was intended.
· The unit is a partial unit air conditioner, complying with partial unit requirements of the International Standard, and must only be connected to other units that have been confirmed as complying with corresponding partial unit requirements of the International Standard.
· This manual is essential for product operation and should remain with the air conditioning equipment.
· If you have questions, please contact your distributor or contractor.

Introduction
This manual focuses on the outdoor/indoor unit. Read this manual carefully before installation. Also, refer to other manuals where necessary. Forward this manual and the warranty to the next team of installers and then users. Ask them to keep this manual with the air conditioner for future reference. (Refrigerant Piping Work) (Electrical Wiring Work) (Ref. Charge Work) (Test Run) (User)
· With regard to the installation (including the mechanical installation, refrigerant system installation and electrical wiring connection), please read the following pages carefully. Installation Work …Chapter 4 Refrigerant Piping Work…Chapter 5 Electrical Wiring… Chapter 6
· For wiring between the indoor unit and the outdoor unit, refer to the Installation and Maintenance Manual for the outdoor unit.
· For the optional decorative panel, refer to the Installation and Maintenance Manual for the optional decorative panel.(Only for 1-Way, 2-Way, and 4-Way Cassette Types)
· For each optional controller, refer to the Installation and Maintenance Manual and the Operation Manual.
· For each optional part, refer to the Installation and Maintenance Manual.
· For the central controller, refer to the Installation and Maintenance Manual and the Operation Manual.
Product Inspection upon Arrival
1. Upon receiving this product, inspect it for any damages incurred in transit. Claims for damage, either apparent or concealed, should be filed immediately with the shipping company.
2. Check the model number, electrical characteristics (power supply, voltage, and frequency rating), and accessories to determine if they are correct with the purchase order.
3. Please contact your local agent or contractor if any issues involving installation, performance, or maintenance arise. Liability does not cover defects originating from unauthorized modifications performed by a customer without the written consent of Hitachi-Johnson Controls Air Conditioning. Performing any mechanical alterations on this product without the consent of the manufacturer will render your warranty null and void.
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TABLE OF CONTENTS
Models ……………………………………………………………………………………………………………………………. i IMPORTANT NOTICE ………………………………………………………………………………………………………..ii 1. Safety Summary…………………………………………………………………………………………………………..1 2. Before Installation………………………………………………………………………………………………………..8
2.1 About This Product…………………………………………………………………………………………………..8 2.2 Line-Up of Outdoor Units………………………………………………………………………………………..10 2.3 Combination of Indoor Unit and Outdoor Unit………………………………………………………….12 2.4 Piping Connection Kit (Optional) between Outdoor Units………………………………………….13 2.5 Multi-Kit (Optional) between Indoor Unit and Outdoor Unit ………………………………………14 2.6 Factory-Supplied Accessories ………………………………………………………………………………….14 3. Selection of Installation Location ………………………………………………………………………………..16 3.1 Installation Location ………………………………………………………………………………………………16 3.2 Service Space and Installation Area …………………………………………………………………………16 4. Installation Work………………………………………………………………………………………………………..19 4.1 Transportation and Handling ………………………………………………………………………………….19 4.2 Outdoor Unit Installation ……………………………………………………………………………………….21 5. Refrigerant Piping Work………………………………………………………………………………………………24 5.1 Piping Materials……………………………………………………………………………………………………..24 5.2 Flaring and Joint ……………………………………………………………………………………………………26 5.3 Caution about Outdoor Unit Installation ………………………………………………………………….27 5.4 Piping Connection Work …………………………………………………………………………………………28 5.5 Piping Work between Outdoor Units ………………………………………………………………………………………….. 34 5.6 Piping Size, Piping Connection and Multi-Kit Selection ……………………………………………..42 5.7 Piping Branch Restrictions………………………………………………………………………………………45 5.8 Restrictions on Height Difference between Indoor Units ……………………………………………46 6. Electrical Wiring …………………………………………………………………………………………………………47 6.1 General Check………………………………………………………………………………………………………..47 6.2 Electrical Wiring for Outdoor Unit………………………………………………………………………………………48 6.3 Electrical Wiring Connection……………………………………………………………………………………49 6.4 Electrical Wiring Connection of Indoor Unit and Outdoor Unit …………………………………..52 6.5 PSW and DIP Switch Setting for Outdoor Unit …………………………………………………………..54 7. Air-Tight Test and Additional Refrigerant Charge …………………………………………………………..58 7.1 Air-Tight Test………………………………………………………………………………………………………….58 7.2 Vacuuming…………………………………………………………………………………………………………….59 7.3 Additional Refrigerant Charge Calculation………………………………………………………………..60 7.4 Charging Work ……………………………………………………………………………………………………….61 8. Test Run…………………………………………………………………………………………………………………….63 8.1 Before Test Run………………………………………………………………………………………………………63 8.2 Test Run ………………………………………………………………………………………………………………..64 9. Safety and Control Device Setting………………………………………………………………………………..70 iii

1. Safety Summary

Indicates a hazardous

DANGER situation which, if not
avoided, will result in death

or serious injury.

Indicates a hazardous

WARNING

situation which, if not avoided,could result in death

or serious injury.

Is used with the safety

alert symbol, indicates a

CAUTION hazardous situation which, if
not avoided, could result in

minor or moderate injury.

Is used to address practices

NOTICE not related to personal
injury.

NOTE
NOTE

Indicates useful information for operation and/or maintenance.

General Precautions

WARNING
To reduce the risk of serious injury or death, read these instructions thoroughly and follow all warnings or cautions included in all manuals that accompany the product. Incorrect installation could cause leaks, electric shock, fire or explosion.
· Hitachi-Johnson Controls Air Conditioning will not assume any liability for injuries or damage caused by not following steps outlined or described in this manual. Unauthorized modifications to Hitachi-Johnson Controls Air Conditioning products are prohibited as they:
May create hazards that could result in death, serious injury or equipment damage;
Will void product warranties; May invalidate product regulatory
certifications.
· This system should be installed by personnel certified by Hitachi-Johnson Controls Air Conditioning. Professional personnel must follow all local and national codes. Where Seismic Performance requirements are specified, take appropriate measures during installation to guard against possible damage or injury that might occur in an earthquake due to incorrect installation or a unit falling.
· This air conditioning system is intended to be used by expert or trained users in shops, in light industry and on farms, or for commercial

1. Safety Summary
use by lay persons.
· Use appropriate Personal Protective Equipment (PPE), such as gloves and protective goggles and, where appropriate, have a gas mask nearby. Also use electrical protection equipment and tools suited for electrical operation purposes. Keep a quenching cloth and a fire extinguisher nearby during brazing. Use care in handling, rigging, and setting bulky equipment.
· Before servicing, turn off the power supply and use accepted lockout and tag out procedures at all main switches. Failure to do so can result in damage to internal components with severe or fatal electrical shock.
· This unit is a pressurized system. Never loosen threaded joints while the system is under pressure and never open pressurized system parts.
· When the air conditioner needs repair or is transported to a new location, contact your distributor or contractor. If the repair and the installation are not completed, electric shock or fire can result.
· When transporting, be careful when picking up, moving and mounting these units. Although the unit may be packed using plastic straps, do NOT use them for transporting the unit from one location to another. Do NOT stand on or put any material on the unit. Get a partner to help, and bend with your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut fingers, so wear protective gloves.
· Use only recommended/standardized replacement parts provided by HitachiJohnson Controls Air Conditioning.
· This air conditioning system can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the air conditioning system in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision.
· Do NOT attempt to “clean” indoor unit components with liquid or powdered cleaning agents during maintenance. Electric shock, sparks, flame, and serious or fatal injury can occur.
· When the flat panel is opened (closed) or the
1

1. Safety Summary
air filter is attached (removed), hold them firmly. If not, it may cause falling or injury. (only for wall mounted type)
· Do NOT insert fingers or objects into air inlet/ outlet. Injury can result from rotating fan blades or energized electrical components.
· Do NOT touch the main circuit board or electronic components in the controller or remote devices. Make sure that dust and/or moisture does not accumulate on the circuit board.
· Do NOT touch the wired controller with wet hands to prevent damage to the wired controller or an electrical shock.
· If you smell anything burning, shut down the unit and turn off the power at the main power supply. Contact the fire department and your installer or electrical contractor.
· Do not apply hair spray, insecticides, lacquers, or other pressurized substances within 1 m of any air conditioner. The substances can react with energized electrical contractor.
· For safe operation, the air conditioning system shall be inspected and maintained every 6 months.
CAUTION
To reduce the risk of minor or moderate injury, the following general precautions must be followed.
· About Wireless Controller
Pay attention to the following to use the batteries correctly. If not, it may cause liquid spill or burst.
· Never use new and used batteries together.
· Never use the different types of batteries (for example manganese battery and alkaline battery) together.
· When the wireless controller is not used over a prolonged period of time (more than 2 or 3 months), remove the batteries from the wireless controller. After removing the old batteries, wait five or more seconds before inserting the new ones
NOTICE
Take the following precautions to reduce the risk of property damage.
· Each model number and all matching model
2

numbers within a system must have the same version of software. Follow these steps to verify that your product model numbers have the same version of software.
Access the main printed circuit board in each product.
Locate a white sticker with a P-XXXX number or
Connect a service checker and locate the ROM number.
· In a hospital or facility, install the unit at least 3 m away from medical or electronic devices. Operation of the unit may adversely affect the devices. The devices generate electromagnetic interference (EMI) waves that can directly radiate into the unit and cause malfunction.
· If there is a source of electrical interference near the power source, install noise suppression equipment (filter).
· If the wired controller is installed in a location where electromagnetic radiation is generated, make sure that the wired controller is shielded and cables are sleeved inside conduit tubing.
· Be careful that moisture, dust, or variant refrigerant compounds not enter the refrigerant cycle during installation work. Foreign matter could damage internal components or cause blockages.
· If air filters are required on this unit, do NOT operate the unit without the air filter set in place. If the air filter is not installed, dust may accumulate and breakdown may result.
· Do NOT install the unit in a location where animals and plants can come in direct contact with the outlet air and become adversely affected.
· Be sure the condensate hose discharges water properly. If connected incorrectly, leaks can occur.
· Do NOT install the unit with any downward slope to the side of the condensate pipe. If you do, you may have drain water flowing back which may cause leaks.
· Do NOT install the unit in any place where oil can seep into the units, such as a kitchen in restaurants, and so forth. For these locations or social venues, use specialized units with oilresistant features built into them. In addition, use a specialized ceiling fan designed for restaurant use. These specialized oil-resistant units can be ordered for such applications. However, in places where large quantities of oil can splash onto the unit, such as a factory,

even the specialized units cannot be used. These products should not be installed in such locations.
· Do NOT install this unit in any place where silicon gases can coalesce. If the silicon gas comes into contact with the surface of the heat exchanger, the finned surfaces repel water. As a result, moisture can enter from the condensate pan into the electrical box, possibly causing electrical failures.
· Do not place any flammable items or anything that can cause a fire on or around the outdoor unit. It may cause a fire.
· During the test run, check the unit’s operation temperature. If the unit is used in an environment where the temperature exceeds the operation boundary, it may cause severe damage. Check the working range in the manual.
· The A-weighted emission sound pressure level does not exceed 70 dB (A).
Installation Precautions
WARNING
To reduce the risk of serious injury or death, the following installation precautions must be followed.
· When installing the unit into:
A wall: Make sure the wall is strong enough to hold the unit’s weight. It may be necessary to construct a strong wood or metal frame to provide added support.
A room: Properly insulate any refrigerant piping run inside a room to prevent “condensation” that can cause dripping and water damage to wall and floors.
Damp or uneven areas: Use a raised concrete pad or concrete blocks to provide a solid, level foundation for the unit to prevent water damage and abnormal vibration.
An area with high winds: Securely anchor the outdoor unit down with bolts and a metal frame. Provide a suitable air baffle.
· Do NOT install the unit in the following places. Doing so can result in an explosion, fire, deformation, corrosion, or product failure. Explosive or flammable atmosphere Where a fire, oil, steam or powder can directly enter the unit, such as nearby or

1. Safety Summary
above a kitchen stove. Where oil (including machinery oil) may be
present. Where corrosive gases such as chlorine,
bromine, or sulfide can accumulate, such as near a hot tub or a hot spring. Where dense, salt-laden airflow is heavy, such as in coastal regions. Where the air quality is of high acidity. Where harmful gases can be generated from decomposition.
· Do NOT position the condensate pipe for the indoor unit near any sanitary sewers where corrosive gases may be present. If you do, toxic gases can seep into breathable air spaces and can cause respiratory injuries. If the condensate pipe is installed incorrectly, water leakage and damage to the ceiling, floor, furniture, or other possessions may result. If the condensate pipe becomes clogged, water may drip from the indoor unit. Do NOT install the indoor unit where such dripping can cause moisture damage or at uneven locations.
· During transportation, do NOT allow the backrest of the forklift make contact with the unit, otherwise, it may cause damage to the heat exchanger and also may cause injury when stopped or started suddenly.
· Before performing any brazing work, be sure that there are no flammable materials or open flames nearby.
· Remove gas inside the closing pipe when the brazing work is performed. If the brazing filler metal is melted with remaining gas inside, the pipes will be blown off and it may cause injury.
· Be sure to use nitrogen gas for the airtight test. If other gases such as oxygen gas, acetylene gas or fluorocarbon gas are accidentally used, it may cause an explosion or gas intoxication.
· Perform a test run to ensure normal operation. Safety guards, shields, barriers, covers, and protective devices must be in place while the compressor/unit is operating. During the test run, keep fingers and clothing away from any moving parts.
· Do NOT install the indoor unit anywhere discharge airflow can pass directly toward nearby heating equipment (space heaters). It may interfere with the combustion process in these units.
· When the indoor unit is operating with heating equipment, ventilate the room sufficiently. Any leaked refrigerant gas that happens to come into contact with any heat source can become
3

1. Safety Summary
toxic on contact and can cause suffocation in the immediate area.
· Do NOT install this system in close proximity to septic sewer lines where flammable and toxic gases can coalesce.
CAUTION
To reduce the risk of minor or moderate injury, the following installation precautions must be followed.
· Proper handling of this unit requires two people. Safe handling and installation of the indoor unit requires the strength of two people. Mounting the unit alone may cause injury due to a fall of the unit. Although the unit may be girded with plastic bands, do NOT use it for transportation. Avoid contact with finned surfaces of the heat exchanger as sharp edges can cause severe injury to hands and fingers. Use appropriate work gloves for the job.
NOTICE
Take the following precautions to reduce the risk of property damage.
· The optional decorative panel can become deformed if the positioning of the indoor unit’s suspension brackets is not stable or level. Condensation can accumulate in low spots as a result due to escaping air through any resulting gaps between the indoor unit and the decorative panel.
· Check to ensure that the condensate hose discharges moisture properly. If connected incorrectly, it can result in leakage and cause damage to furniture.
· Make sure to use the factory-supplied condensate hose and hose clamp. Non- factory supplied condensate hose and hose clamp can cause water leakage.
· Do NOT bend or twist the factory-supplied condensate hose. This could compromise the seal and result in water leakage.
· Do NOT apply excessive force to the condensate pipe connection. This can also compromise the seal properties of the connection.
· Verify that the installed unit is level with floor and ceiling surfaces. Any variance or inclination can cause moisture to back up into the condensate pan, overflow, and seepage onto ceiling or wall surfaces, and cause damage to carpeted surfaces or furniture below. 4

· Air circulation should be optimized to achieve the best distribution pattern and not settled into isolated pockets that can make people uncomfortable.
· Inspect the condensate pan before the onset of winter to drain away all accumulated water in the pan.
· The heat exchanger of indoor unit overheats whenever there is a slight amount of refrigerant circulating during slowdown or stoppage. As a result, water in the condensate pan evaporates and can condense on ceiling or wall surfaces.
· After the drain check is completed, insert the rubber plug again and seal the gap with a silicon sealant.
· Clean up the site when finished, remembering to check that no metal scraps or bits of wiring have been left inside the unit being installed.
· Do NOT install the decorative panel with motion sensor and radiation sensor or motion sensor kit in the following places. It may cause failure or deterioration of the sensor.
Ambient temperature changes drastically. Where excessive force or vibration is applied
to the sensor. Where static electricity or electromagnetic
waves may generate. Where interference of infrared light such as
glasses or mist are in the detecting area. Where the lens for sensor is exposed to high
temperature and humidity for a long time. Where fluid and corrosive gas exist. Where direct lights such as sunlight or
headlights affect the sensor. Where hot air from a heater, etc. affects
directly to the sensor. Where the air flow returns to the sensor by
hitting obstacles such as a shelf, locker, etc. Where the blower devices such as ceiling
fan, ventilating fan, etc. affect the air flow from the indoor unit. Where weather affects directly the surface of the sensor. Where the lens surface may smudge or be damaged such as a dusty environment. Detecting function will decrease if the lens for sensor smudges. In this case, wipe off smudges using a cotton swab soaked with alcohol (Isopropyl alcohol is recommended.) or a soft cloth. (When wiping off smudges on the lens for sensor, do NOT apply excessive force. If excessive force is applied, the resin lens may be damaged and this may cause

malfunctions such as misdetection or undetectable motion.)
· When using the remote control thermo function, consider the following points when selecting the installation location.
Where the average temperature of the room can be detected
Where there is no direct sunlight Where there is no heat source nearby Where hot/cold air from the outdoors, or
a draft from elsewhere (such as air vents, diffusers or grilles) can affect air circulation.
· When installing the wired controller in the following locations with poor temperature distribution, install remote sensors.
Where the unit is exposed to direct sunshine or direct light.
Where the unit is in close proximity to a heat source.
Where hot/cold air from the outdoors, or a draft from elsewhere (such as air vents, diffusers or grilles) can affect air circulation.
In areas with poor air circulation and ventilation.
· When a wireless controller is used, locate at a distance of at least 3 m between the indoor unit and electric lighting. If not, the receiver part of the unit may have difficulty receiving operation commands.
Refrigerant Precautions
WARNING
To reduce the risk of serious injury or death, the following refrigerant precautions must be followed.
· As originally manufactured, this unit contains refrigerant charged by Hitachi-Johnson Controls Air Conditioning. Hitachi-Johnson Controls Air Conditioning uses only refrigerants that have been approved for use in the unit’s intended home country or market. HitachiJohnson Controls Air Conditioning distributors similarly are only authorized to provide refrigerants that have been approved for use in the countries or markets they serve. The refrigerant used in this unit is identified on the unit’s faceplate and/or in the associated manuals. Any additions of refrigerant into this unit must comply with the country’s requirements with regard to refrigerant use and should be obtained from Hitachi-Johnson Controls Air Conditioning distributors. Use

1. Safety Summary
of any non-approved refrigerant substitutes will void the warranty and will increase the potential risk of injury or death.
· To avoid the possibility of different refrigerant or refrigerant oil being introduced into the cycle, the sizes of the charging connections have been changed from R407C type and R22 type. It is necessary to prepare the following tools listed in “Necessary Tools and Instruments List for Installation” in the Installation and Maintenance Manual before performing the installation work. Use refrigerant pipes and joints which are approved for use with R410A.
· The refrigerant R410A is adopted. The refrigerant oil tends to be affected by foreign matters such as moisture, oxide film, (or fat). Perform the installation work with care to prevent moisture, dust, or different refrigerant from entering the refrigerant cycle. Foreign matter can be introduced into the cycle from such parts as expansion valve and the operation may be unavailable.
· The outdoor unit shall only be connected to indoor units suitable for the same refrigerant (R410A).
· The design pressure for this product is 4.15 MPa. The pressure of the refrigerant R410A is 1.4 times higher than that of the refrigerant R22. Therefore, the refrigerant piping for R410A must be thicker than that for R22. Make sure to use the specified refrigerant piping. If not, the refrigerant piping may rupture due to an excessive refrigerant pressure. Besides, pay attention to the piping thickness when using copper refrigerant piping. The thickness of copper refrigerant piping differs depending on its material.
· The maximum operating pressure is 4.15 MPa. This maximum operating pressure shall be considered when connecting the outdoor unit to correlated indoor units.
· When installing the unit, and connecting refrigerant piping, keep all piping runs as short as possible, and make sure to securely connect the refrigerant piping before the compressor starts operating. If the refrigerant piping is not connected and the compressor activates with the stop valve opened, the refrigerant cycle will become subjected to extremely high pressure, which can cause an explosion or fire.
· If installed in a small room, take measures to prevent the refrigerant from exceeding the maximum allowable concentration in the event that refrigerant gases should escape. The
5

1. Safety Summary
installation should meet the requirements in each regional regulation. If refrigerant gas leaks during the installation work, ventilate the room immediately.
· The refrigerant system may be damaged if the slope of the piping connection kit exceeds +15°.
· Tighten the flare nut with a torque wrench in the specified manner. Do NOT apply excessive force to the flare nut when tightening. If you do, the flare nut can crack and refrigerant leakage may occur.
· When maintaining, relocating, and disposing of the unit, dismantle the refrigerant piping after the compressor stops.
· When pipes are removed from under the piping cover, after the insulation work is completed, cover the gap between the piping cover and pipes using a packing material (field-supplied). If the gap is not covered, the unit may be damaged if snow, rain water or small animals enter the unit.
· Do NOT apply excessive force to the spindle valve at the end of opening. Otherwise, the spindle valve flies out due to refrigerant pressure. At the test run, fully open the gas and liquid valves. Otherwise, these devices will be damaged. (It is closed before shipment.)
· Before installation is complete, make sure that the refrigerant leak test has been performed. If refrigerant gases escape into the air, turn off the main switch, extinguish any open flames and contact your service contractor. Refrigerant (Fluorocarbon) for this unit is odorless. If the refrigerant should leak and come into contact with open flames, toxic gas could be generated. Also, because the fluorocarbons are heavier than air, they settle to the floor, which could cause asphyxiation.
· If refrigerant gas should leak, turn off all heating equipment and ventilate the room immediately. Mop down or vacuum floor areas of residual toxic particulate.
· This product contains fluorinated greenhouse gases that its functioning relies upon. Do NOT vent into the atmosphere. Refrigerant type: R410A For mass of charged refrigerant, refer to chapter 7. GWP1: 2090 1. GWP=global warming potential

Electrical Precautions
WARNING
To reduce the risk of serious injury or death, the following refrigerant precautions must be followed.
· This air conditioning system shall be installed in accordance with national wiring regulations.
· Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these instructions when wiring. Improper connections and inadequate grounding can cause serious injury or death.
· Means for disconnection from the supply mains, which have a contact separation in all poles that provide full disconnection under over voltage category III conditions, must be incorporated in the fixed wiring in accordance with the wiring rules.
· Be sure to use the dedicated circuit and perform all electrical work in strict accordance with this manual and all relevant regulatory standards.
· This air conditioning system is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the air conditioning system by a person responsible for their safety.
Supervise children to ensure they do not play with the unit.
If the power supply wiring is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.
· Do NOT open the service cover or access panel to indoor or outdoor units without turning off the main power supply. Before servicing, open and tag all disconnect switches. Never assume electrical power is disconnected. Check with a multimeter.
· Turn off all power at the main power source before performing maintenance work. Failure to do so can result in damage to internal components with severe or fatal electrical shock.
· Do NOT operate indoor units with the electrical box and switch panel open and exposed. Incidental contact with energized components can prove fatal.

6

· Insulate all electrical components and connections from exposure to moisture. Failure to do so can result in an electrical short circuit and fire.
· Do NOT tamper with or attempt to “repair” electrical wiring or connections. Call your installer or electrical contractor. Serious or fatal injury can occur.
· Only use electrical protection equipment and tools suited for this installation.
· The Main Fuse shall be replaced by the professional person.
· Use an exclusive power supply for the air conditioner at the unit’s rated voltage.
· Use the specified cables between units. · Be sure to install circuit breakers such as an
earth leakage circuit breaker (ELB)/ground fault interrupter (GFCI), isolating switch, molded case circuit breaker and so on), with the specified capacity. Ensure that the wiring terminals are tightened securely to recommended torque specifications. If a circuit breaker or fuse is frequently activated, shut down the system and contact your service contractor.
· Shut down at the main power supply if the ELB (GFCI) activates frequently. Contact your distributor or contractor immediately. Failure to act accordingly can result in serious injury and damage to the unit.
· Clamp electrical wires securely with a cable band after all wiring is connected to the terminal block. In addition, run wires securely through the wiring access channel or the electrical conduit.
· When installing the power lines, do NOT apply tension to the cables. Secure the suspended cables at regular intervals, but not too tightly.
· Make sure that the terminals do NOT come into contact with the surface of electrical box. If the terminals are too close to the surface, it may lead to failures at the terminal connection.
· After stopping operation, be sure to wait at least five minutes before turning off the main power switch. Otherwise, water leakage or electrical breakdown may result. Disconnect the power supply completely before attempting any maintenance for electrical parts. Confirm that no residual voltage is present after disconnecting the power supply.
· Residual voltage can cause electric shock. At all times, check for residual voltage after disconnecting from the power source before starting work on the unit.

1. Safety Summary
· The installation of a residual current device (RCD) having a rated residual operating current not exceeding 30 mA is advisable.
· Do NOT clean with, or pour water onto the controller as it could cause an electric shock and/or damage the unit. Do NOT use strong detergent such as a solvent. Clean with a soft cloth.
· Check that the earth (ground) wiring is securely connected. Do NOT connect ground wiring to gas piping, water piping, lightning conductor, or telephone ground wiring.
· Do NOT run the relay wiring for the motion sensor and power supply wiring in parallel. Electromagnetic Interference (EMI) may cause malfunction of the sensor. (Only for indoor unit with motion sensor)
· The polarity of the input terminals is important, so be sure to match the polarity when using contacts that have polarity.
· Before installing the controller or remote devices, ensure the indoor and outdoor unit operation has been stopped. Further, be sure to wait at least five minutes before turning off the main power switch to the indoor or outdoor units. Otherwise, water leakage or electrical breakdown may result.
· Do NOT install the wired controller in the hightemperature and humidity location.
· When connecting the controller cabling to the units, do NOT touch or adjust any safety devices inside the indoor or outdoor units. All safety features, disengagement, and interlocks must be in place and functioning correctly before the equipment is put into operation. If these devices are improperly adjusted or tampered with in any way, a serious accident can occur. Never bypass any safety device or switch.
NOTICE
Take the following precautions to reduce the risk of property damage.
· Use an exclusive power supply with the rated voltage for the controller that requires an external power supply.
· Communication cable must be shielded twist pair cable (0.75 mm2). Shielded cable must be considered for applications and routing in areas of high EMI and other sources of potentially excessive electrical noise to reduce the potential for communication errors. When shielded cable is 7

2. Before Installation
applied, proper bonding and termination of the cable shield is required as per Hitachi-Johnson Controls Air Conditioning guidelines. Plenum and riser ratings for communication cables must be considered per application and local code requirements.
· The air conditioner may not function normally in the following instances: If electrical power for the air conditioner is supplied from the same transformer as a device1 referred to below. If the power source cables for this device1 and the air conditioner are located in close proximity to each other. *1. A device can include a lift, container crane, rectifier for electric railway, inverter power device, arc furnace, electric furnace, largesized induction motor and large-sized switch.
Regarding the cases mentioned above, surge voltage may be inducted into the power supply cables for the air conditioner due to a rapid change in power consumption of the device and an activation of a switch. Check field regulations and standards before performing electrical work in order to protect the power supply for the air conditioner.
· Turn off and disconnect the unit from the power source when handling the service connector. Do NOT open the service cover or access panel to the indoor or outdoor units
without turning off the main power supply.
2. Before Installation
2.1 About This Product
Hitachi proudly introduces the New “air365 Max” series, the highly-efficient and reliable airconditioning system. Recently, increased numbers of buildings are requiring “Intelligent” facilities – communication networks, office automation, and a comfortable environment. Particularly, comfortable space is required all the day through the year in office buildings. This multi-split system air conditioner, “air365 Max” series can meet these requirements. The proven combination of the scroll compressor and the inverter provides the best air conditioning for small/medium office buildings.
· SYSTEM FREE System
Hitachi has developed the SYSTEM FREE system with its customers always in mind. This system, which is unique in the world,
8

allows the interconnection of the same indoor units for all the Hitachi systems. This system provides the end user with greater flexibility for installation, which means that the air-conditioning systems will integrate better with the whole of the installations that make up the building.
· Wide Product Range of Outdoor Units
Space, structure and necessary functions, in line with evolution in building design, the requirements for air conditioning have also diversified.
· About Refrigerant
WARNING
· The design pressure for this product is 4.15 MPa. The pressure of the refrigerant R410A is 1.4 times higher than that of the refrigerant R22. Therefore, the refrigerant piping for R410A must be thicker than that for R22. Make sure to use the specified refrigerant piping. If not, the refrigerant piping may rupture due to an excessive refrigerant pressure. Besides, pay attention to the piping thickness when using copper refrigerant piping. The thickness of copper refrigerant piping differs depending on its material.
NOTICE
· The refrigerant R410A is adopted. The refrigerant oil tends to be affected by foreign matters such as moisture, oxide film, (or fat). Perform the installation work with care to prevent moisture, dust, or different refrigerant from entering the refrigerant cycle. Foreign matter can be introduced into the cycle from such parts as expansion valve and the operation may be unavailable.
· To prevent the different refrigerant or refrigerant oil from being mixed into the cycle, the sizes of the charging connections have been changed from R407C type and R22 type. It is necessary to prepare the following tools before performing the installation work.
· Use refrigerant pipes and joints which can
be used for R410A.

· Necessary Tools and Instruments List for Installation

No.

Tool

No.

Tool

2. Before Installation

No.

Tool

1 Handsaw

8 Plier

16 Cutter for Wires

2 Phillips Screwdriver

9 Pipe Cutter

17 Gas Leak Detector

3 Vacuum Pump

10 Brazing Kit

18 Leveller

4 Refrigerant Gas Hose

11 Hexagon Wrench

19 Clamper for Solderless Terminals

5 Megohmmeter

12 Spanner

20 Hoist (for Indoor Unit)

6 Copper Pipe Bender

13 Weigher

21 Ammeter

7

Manual Water Pump (for Indoor Unit)

14 Charging Cylinder 15 Gauge Manifold

22 Voltage Meter 23 Wrench

Use tools and measuring instruments only for the new refrigerant R410A as they come into direct contact with the refrigerant.

G: Interchangeability is available with current R22 l: Only for Refrigerant R410A (No Interchangeability with R22) 5: Prohibited F: Only for Refrigerant R407C (No Interchangeability with R22)

Interchangeability

Measuring Instrument and Tool

with R22

Reason of Non-Interchangeability and Attention (: Strictly Required)

Use

R410A R407C

Pipe Cutter Chamfering Reamer
Flaring Tool
Extrusion Adjustment Gauge

G

G

–

Cutting Pipe Removing Burrs

G l

G · The flaring tools for R407C are applicable to Flaring for Tubes

R22.

· If using flaring tube, make dimension of tube Dimensional

l

–

larger for R410A.
· In case of material 1/2H, flaring is not

Control for Extruded Portion of Tube

available.

after Flaring

Pipe Bender

G

G

· In case of material 1/2H, bending is not available. Use elbow for bend and braze.

Bending

Refrigerant Expanding Tool

G

Pipe

l Torque Wrench
G

· In case of material 1/2H, expanding of tube

G

is not available. Use socket for connecting Expanding Tubes

tube.

G

· For 12.7, 15.88, spanner size is increased

by 2mm.

Connection of

G

· For 6.35, 9.52, 19.05, spanner size is the Flare Nut same.

Brazing Tool

G

G · Perform correct brazing work.

Brazing for Tubes

Nitrogen Gas

G

G

· Strict Control against Contamination (Blow nitrogen during brazing.)

Prevention from Oxidation during Brazing

Lubrication Oil (for Flare Surface)

l

F

· ·

Use a synthetic oil which is equivalent to the oil used in the refrigeration cycle. Synthetic oil absorbs moisture quickly.

Applying Oil to the Flared Surface

9

2. Before Installation

Interchangeability

Measuring Instrument and Tool

with R22

Reason of Non-Interchangeability and Attention (: Strictly Required)

Use

R410A R407C

Refrigerant Cylinder

· Check refrigerant cylinder color.

l

F Liquid refrigerant charging is required

regarding zeotropic refrigerant.

Refrigerant Charging

Vacuum Pump

G

G The current ones are applicable. However,

Adapter for Vacuum Pump

l*1

F

it is required to mount a vacuum pump adapter which can prevent reverse oil flow when a vacuum pump stops.

Vacuum Pumping

· No interchangeability is available due to

higher pressures when compared with R22.

Manifold Valve

l

F Do not use current ones to the different

Vacuum Pumping,

Vacuum

Drying/

Refrigerant

Charge

Charging Hose

l

F

refrigerant. If used, mineral oil will flow into the cycle and cause sludges, resulting in clogging or compressor failure. Connection diameter is different; R410A:

Vacuum Holding, Refrigerant Charging and Check of Pressures

UNF1/2, R407C: UNF7/16.

Charging Cylinder 5

5 · Use the weight scale.

–

Weight Scale

G

Refrigerant Gas Leakage Detector

l*1

G

–

· The current gas leakage detector (R22) is

F

not applicable due to different detecting

method.

Measuring Instrument for Refrigerant Charging
Gas Leakage Check

*1. Interchangeability with R407C.

2.2 Line-Up of Outdoor Units

Standard Type: CNCCLW

1. This outdoor unit series “CNCCLW” can build the capacity of 8 to 120 HP by combining the outdoor units of 8 to 30 HP.
2. The combinations not indicated in the table below are unavailable.

HP

8

10

12

14

16

18

Model RAS-080CNCCLW RAS-100CNCCLW RAS-120CNCCLW RAS-140CNCCLW RAS-160CNCCLW RAS-180CNCCLW

HP

20

22

24

26

28

30

Model RAS-200CNCCLW RAS-220CNCCLW RAS-240CNCCLW RAS-260CNCCLW RAS-280CNCCLW RAS-300CNCCLW