HITACHI RAS-080CNCCLI Air Conditioners Instruction Manual

Instruction Manual for HITACHI models including: RAS-080CNCCLI Air Conditioners, RAS-080CNCCLI, Air Conditioners, Conditioners

INSTALLATION & MAINTENANCE MANUAL

2023-02-08 — 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 ...

7 feb 2023 — unit, use the drain adapter set (Optional, DBS-. TP10A). Do not use drain adapter and drain pan kit in the cold area. The drain water in the drain pipe may.

File Info : application/pdf, 76 Pages, 13.14MB

Installation and Maintenance Manual TF CO A1638IN3TM India

INSTALLATION & MAINTENANCE MANUAL

INVERTER-DRIVEN
AIR CONDITIONERS Max SERIES
OUTDOOR UNITS
MODELS <BASE UNITS> COOLING ONLY
(Standard Type)
RAS-080CNCCLI TO RAS-300CNCCLI

EN INSTALLATION & MAINTENANCE MANUAL Original Instructions

Scan the code to get the electronic manual.

A1638IN3TM

Models

Applicable Models

HP 8HP 10HP 12HP 14HP 16HP 18HP

Cooling Only RAS-080CNCCLI RAS-100CNCCLI RAS-120CNCCLI RAS-140CNCCLI RAS-160CNCCLI RAS-180CNCCLI

HP 20HP 22HP 24HP 26HP 28HP 30HP

Cooling Only RAS-200CNCCLI RAS-220CNCCLI RAS-240CNCCLI RAS-260CNCCLI RAS-280CNCCLI RAS-300CNCCLI

Unit Nomenclature RAS - 080 C N C C L I

Nomenclature Description

Production Location: Ahmedabad, India

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

C: "C" Series (Standard Type)

C 3rd Generation

N Refrigerant Type: R410A

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

< Cooling Operation >
Intermittent Range 55 52 50 48 45 40
35 30 25 20 15
10 0 -10
15 20 23 25 Indoor Air Inlet Temperature (°C WB)

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

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.
ii

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. GWP*1: 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.

· 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 high-
temperature 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 device*1 referred to below. If the power source cables for this device*1 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

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

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

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

Control for Extruded Portion of Tube

available.

after Flaring

Pipe Bender

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

Bending

Refrigerant Expanding Tool

Pipe

l Torque Wrench
G

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

is not available. Use socket for connecting Expanding Tubes

tube.

· For 12.7, 15.88, spanner size is increased

by 2mm.

Connection of

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

Brazing Tool

G · Perform correct brazing work.

Brazing for Tubes

Nitrogen Gas

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

Prevention from Oxidation during Brazing

Lubrication Oil (for Flare Surface)

· ·

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

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.

F Liquid refrigerant charging is required

regarding zeotropic refrigerant.

Refrigerant Charging

Vacuum Pump

G The current ones are applicable. However,

Adapter for Vacuum Pump

l*1

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

F Do not use current ones to the different

Vacuum Pumping,

Vacuum

Drying/

Refrigerant

Charge

Charging Hose

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

Refrigerant Gas Leakage Detector

l*1

· The current gas leakage detector (R22) is

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: CNCCLI

1. This outdoor unit series "CNCCLI" 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.

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

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

Model RAS-320CNCCLI RAS-340CNCCLI RAS-360CNCCLI RAS-380CNCCLI RAS-400CNCCLI RAS-420CNCCLI

RAS-180CNCCLI RAS-180CNCCLI RAS-180CNCCLI RAS-220CNCCLI RAS-220CNCCLI RAS-240CNCCLI Combination
RAS-140CNCCLI RAS-160CNCCLI RAS-180CNCCLI RAS-160CNCCLI RAS-180CNCCLI RAS-180CNCCLI

Model RAS-440CNCCLI RAS-460CNCCLI RAS-480CNCCLI RAS-500CNCCLI RAS-520CNCCLI RAS-540CNCCLI

RAS-220CNCCLI RAS-240CNCCLI RAS-240CNCCLI RAS-260CNCCLI RAS-260CNCCLI RAS-280CNCCLI Combination
RAS-220CNCCLI RAS-220CNCCLI RAS-240CNCCLI RAS-240CNCCLI RAS-260CNCCLI RAS-260CNCCLI

2. Before Installation

Model RAS-560CNCCLI RAS-580CNCCLI RAS-600CNCCLI RAS-620CNCCLI RAS-640CNCCLI RAS-660CNCCLI

RAS-280CNCCLI RAS-300CNCCLI RAS-300CNCCLI RAS-220CNCCLI RAS-240CNCCLI RAS-240CNCCLI

Combination RAS-280CNCCLI RAS-280CNCCLI RAS-300CNCCLI RAS-220CNCCLI RAS-220CNCCLI RAS-240CNCCLI

RAS-180CNCCLI RAS-180CNCCLI RAS-180CNCCLI

Model RAS-680CNCCLI RAS-700CNCCLI RAS-720CNCCLI RAS-740CNCCLI RAS-760CNCCLI RAS-780CNCCLI

RAS-240CNCCLI RAS-240CNCCLI RAS-240CNCCLI RAS-260CNCCLI RAS-260CNCCLI RAS-260CNCCLI

Combination RAS-220CNCCLI RAS-240CNCCLI RAS-240CNCCLI RAS-240CNCCLI RAS-260CNCCLI RAS-260CNCCLI

RAS-220CNCCLI RAS-220CNCCLI RAS-240CNCCLI RAS-240CNCCLI RAS-240CNCCLI RAS-260CNCCLI

Model RAS-800CNCCLI RAS-820CNCCLI RAS-840CNCCLI RAS-860CNCCLI RAS-880CNCCLI RAS-900CNCCLI

RAS-280CNCCLI RAS-280CNCCLI RAS-280CNCCLI RAS-300CNCCLI RAS-300CNCCLI RAS-300CNCCLI

Combination RAS-260CNCCLI RAS-280CNCCLI RAS-280CNCCLI RAS-280CNCCLI RAS-300CNCCLI RAS-300CNCCLI

RAS-260CNCCLI RAS-260CNCCLI RAS-280CNCCLI RAS-280CNCCLI RAS-280CNCCLI RAS-300CNCCLI

100

102

Model RAS-920CNCCLI RAS-940CNCCLI RAS-960CNCCLI RAS-980CNCCLI RAS-H00CNCCLI RAS-H02CNCCLI

RAS-240CNCCLI RAS-240CNCCLI RAS-240CNCCLI RAS-260CNCCLI RAS-260CNCCLI RAS-260CNCCLI

RAS-240CNCCLI RAS-240CNCCLI RAS-240CNCCLI RAS-240CNCCLI RAS-260CNCCLI RAS-260CNCCLI Combination
RAS-220CNCCLI RAS-240CNCCLI RAS-240CNCCLI RAS-240CNCCLI RAS-240CNCCLI RAS-260CNCCLI

RAS-220CNCCLI RAS-220CNCCLI RAS-240CNCCLI RAS-240CNCCLI RAS-240CNCCLI RAS-240CNCCLI

104

106

108

110

112

114

Model RAS-H04CNCCLI RAS-H06CNCCLI RAS-H08CNCCLI RAS-H10CNCCLI RAS-H12CNCCLI RAS-H14CNCCLI

RAS-260CNCCLI RAS-280CNCCLI RAS-280CNCCLI RAS-280CNCCLI RAS-280CNCCLI RAS-300CNCCLI

RAS-260CNCCLI RAS-260CNCCLI RAS-280CNCCLI RAS-280CNCCLI RAS-280CNCCLI RAS-280CNCCLI Combination
RAS-260CNCCLI RAS-260CNCCLI RAS-260CNCCLI RAS-280CNCCLI RAS-280CNCCLI RAS-280CNCCLI

RAS-260CNCCLI RAS-260CNCCLI RAS-260CNCCLI RAS-260CNCCLI RAS-280CNCCLI RAS-280CNCCLI

116

118

120

Model RAS-H16CNCCLI RAS-H18CNCCLI RAS-H20CNCCLI

RAS-300CNCCLI RAS-300CNCCLI RAS-300CNCCLI

RAS-300CNCCLI RAS-300CNCCLI RAS-300CNCCLI Combination
RAS-280CNCCLI RAS-300CNCCLI RAS-300CNCCLI

RAS-280CNCCLI RAS-280CNCCLI RAS-300CNCCLI

2. Before Installation

2.3 Combination of Indoor Unit and Outdoor Unit

The following indoor units can be combined with the Hitachi "air365 Max" series outdoor unit.

Table 2.1 Indoor Unit Type List

Indoor Unit

Nominal Capacity

Type

0.4 0.6 0.7 0.8 0.9 1 1.1 1.3 1.5 1.6 1.8 2 2.3 2.5 3 3.3 3.6 4 4.5 5 6 8 10 12 16 20

1-Way Cassette 2-Way Cassette 4(R)-Way Cassette AC Compact Ducted AC Low Static Ducted AC M/H Static Ducted AC Slim/Mini Ducted

{} {}

All Fresh Air

Convertible

{} {}

DC Low Static Ducted DC M/H Static Ducted

DX-AHU kit

Floor Celling

Floor Concealed

Floor Exposed

Mini 4-Way Cassette Total Heat Exchanger

Wall Mounted

: Available, { }: India only NOTE:

The number of indoor units connectable to "air365 Max" series outdoor unit is listed in Tables 2.2 System

Combination. Comply with the following conditions when installing the unit.

Table 2.2 System Combination - CNCCLI

Outdoor Unit

Min. Capacity at Max. Number of

Recommended

Range of

Total Length between Each IDU

Individual Operation Connectable IDU Number of Connectable IDU Combination Capacity and Expansion Valve Kit(*)

RAS-080CNCCLI

40m

RAS-100CNCCLI

RAS-120CNCCLI

60m

RAS-140CNCCLI

70m

RAS-160CNCCLI

80m

RAS-180CNCCLI

RAS-200CNCCLI

RAS-220CNCCLI

120m

RAS-240CNCCLI

RAS-260CNCCLI RAS-280CNCCLI RAS-300CNCCLI

0.6HP (1.6kW)

50 to 200%

150m

RAS-320CNCCLI

RAS-340CNCCLI

180m

RAS-360CNCCLI

RAS-380CNCCLI

RAS-540CNCCLI

RAS-560CNCCLI

50 to 180%

200m

RAS-580CNCCLI to
RAS-H20CNCCLI

50 to 150%

12 Refer to NOTES on page page 13.

2. Before Installation
NOTES:
· The connectable indoor unit capacity ratio can be calculated as follows.
Connectable Indoor Unit Capacity Ratio = Total Indoor Unit Capacity / Total Outdoor Unit Capacity
· For the system under which all the indoor units are supposed to operate simultaneously, the total
indoor unit capacity should be less than outdoor unit capacity. Otherwise, it may cause a decrease of operating performance and operating limit in overload operation.
· For the system under which all the indoor units are not supposed to operate simultaneously, the total
indoor unit capacity is available up to 130%, 150%, 180% or 200% depending on the indoor unit type and capacity.
· Maximum number of connectable indoor units differs depending on the model, capacity, environment
and installation place of connected indoor units. Refer to the Technical Catalog for the selection.
· The air flow volume for indoor units of 0.6 to 1.3HP is set higher than that for indoor units of 1.5HP or
more.
· Total Length between Each I.U. and Expansion Valve Kit (*): This is the summation of the piping length
between each wall mounted type without expansion valve and expansion valve kit in the refrigerant system.
The load capacity per hour or the possibility of all indoor units simultaneous operation is unknown at the design stage, the total capacity of combined indoor units should be not over 100% against the outdoor unit capacity.

2.4 Piping Connection Kit (Optional) between Outdoor Units
MC - NP 21 SA 1

Type of Generation Applicable System
SA, TA: for Heat Pump and Cooling Only System (2 Pipes)
Corresponding Outdoor Units Capacity
[ Standard ] 21: 32 - 48 HP 22: 50 - 60 HP 31: 62 - 90 HP 40: 92 - 120 HP
Refrigerant Type
NP: R410A
Unit Type
MC: Multi Connection Kit for Outdoor Units

Applicable Outdoor Unit

Item

Cooling Only

No. of ODU

Model

Remarks

32 - 48

Piping Connection
Kit

50 - 60 62 - 90

92 - 120

2 MC-NP21SA1 for Gas: 1
for Liquid: 1 2 MC-NP22TA

MC-NP31TA

for Gas: 2 for Liquid: 2

MC-NP40TA

for Gas: 3 for Liquid: 3

2. Before Installation

2.5 Multi-Kit (Optional) between Indoor Unit and Outdoor Unit

MW - NP 282 A 3

1. Line Branch First Branch

2. Multi-Kit after First Branch

Type of Generation Applicable System
A: for Heat Pump and Cooling Only System (2 Pipes)

(Standard Type)
Outdoor Unit HP 8, 10

Model MW-NP282A3

(Standard Type)

Total Indoor Unit HP

Model

<12

MW-NP282A3

No. of Branches Corresponding Outdoor Unit and Indoor Unit Capacity

12 - 16 18 - 24 26 - 54

MW-NP452A3 MW-NP692A3 MW-NP902A3

12 - 17.99 18 - 25.99 26 - 55.99

MW-NP452A3 MW-NP692A3 MW-NP902A3

Refrigerant Type

56 - 120

MW-NP2682A3

NP: R410A

3. Header Branch

Unit Type MW: Line Branch Multi-Kit

(Standard Type)

MH: Header Branch Multi-Kit Total Indoor Unit HP No. of Header Branches

Model

Max. 8

MH-NP224A

Max. 10

MH-NP288A

2.6 Factory-Supplied Accessories

Check to ensure that the following accessories are packed with the outdoor unit. (Refer to page 15 for NOTE.) Table 2.3 Factory-Supplied Accessories (CNCCLI)

Accessory

8HP

10HP

12HP

14HP

16HP

18HP

Remarks

Accessory Pipe

Connection for Refrigerant Gas Pipe

ID 22.4 OD 19.05

Connection for

Refrigerant

Liquid Pipe

Cord Clamp

For Fixing Power Source Wire

Cable Clamp

For Fixing Power Source Wire

×2

For Power Source Wire

Outlet (Bottom Base, Piping

×2

Cover)

Rubber Bush

For Communication Wire Outlet (Bottom Base, Piping

×2

Cover)

For Comm. Wire Outlet

(Bottom Base, Piping

×2

Cover)

Rubber cap *3

Attach to the bottom base.

×2

Packing *3

Attach to the bottom base.

×1

Screw

×3

Combination For Indication of

Unit Model Combination Unit

×3

Label

Model

Open/Close Indication for Stop Valve

For Indication of "Open"

×2

Ferrite Core White

×1

ID 22.4 ID 22.4 ID 25.6 ID 25.6

OD 25.4 OD 25.4 OD 28.58 OD 28.58

- OD 9.52 OD 9.52 - OD 12.7

OD 12.7 OD 12.7

OD 15.88

×2

×2 70 mm

×2

×1

×3

×2

×1

×2

×2 62 mm

×2

×2 38 mm

×2

×2 *1

×1

×1 *2

×3

For fixing Cord Clamp and Spare

Attach to

×3

×3 Outdoor Unit A

(Main Unit)

×2

×2 With Fixing Band

×1

2. Before Installation

Accessory

20HP

22HP 24HP

26HP

28HP

30HP

Remarks

Accessory Pipe
Cord Clamp Cable Clamp
Rubber Bush

Connection for Refrigerant Gas Pipe

ID 25.6 OD 28.58

Connection for Refrigerant Liquid Pipe

OD 12.7 OD 15.88

For Fixing Power Source Wire

×2

For Power Source Wire

Outlet (Bottom Base, Piping

×2

Cover)

For Communication

Wire Outlet (Bottom Base, Piping

×2

Cover)

For Comm. Wire Outlet

(Bottom Base, Piping

×2

Cover)

Rubber cap *3

Attach to the bottom base.

×2

Packing *3

Attach to the bottom base.

×1

Screw

×3

Combination For Indication of

Unit Model Combination Unit

×3

Label

Model

Open/Close Indication for Stop Valve

For Indication of "Open"

×2

Ferrite Core White

×1

-
-
×2 ×2
×2 ×2 ×2 ×1 ×3 ×3 ×2 ×1

ID 28.8 ID 28.8 ID 28.8

OD 31.75 OD 31.75 OD 31.75

ID 15.88 ID 15.88 ID 15.88

OD 19.05 OD 19.05 OD 19.05

×2

×2 70 mm

×2

×2 62 mm

×2

×2 38 mm

×2

×2 *1

×1

×1 *2

×3

For fixing Cord Clamp and Spare

Attach to

×3

×3 Outdoor Unit A

(Main Unit)

×2

×2 With Fixing Band

×1

NOTE:
· If any of these accessories is not packed with the unit, please contact your contractor.

*3. Attach the rubber cap and packing as shown in the figure below.

RAS-080 to 140CNCCLI

RAS-160 to 200CNCCLI

Bottom Base

*1. Attach a rubber cap. RAS-220 to 300CNCCLI

Bottom Base

*1. Attach a rubber cap. *2. Attach a packing. *1. Attach a rubber cap.

*1. Attach a rubber cap.

3. Selection of Installation Location
3. Selection of Installation Location
WARNING
· Provide a sufficiently strong foundation. If
not, the unit may fall down and it may lead to injuries.
· Do not install the outdoor unit where
the flammable gases may occur or leak. Otherwise, it may cause a fire.
· If the indoor unit is installed in a small room
and the refrigerant gas leakage occurs, the leaked refrigerant gas fills the room and it may cause suffocation. Do not exceed the maximum permissible concentration of the refrigerant gas in the room. Consult with distributor for countermeasure such as ventilation system, etc.
3.1 Installation Location
1. Install the outdoor unit in a well dried, ventilated environment.
2. Install the outdoor unit where it is in the shade or it will not be exposed to direct sunshine or direct radiation from high temperature heat source.
3. Install the outdoor unit where the sound or the discharge air from the outdoor unit does not affect neighbors or surrounding ventilation. The operating sound at the rear or right/left sides is 3 to 6dB(A) higher than the sound at the front side indicated in the technical catalog.
4. Install the outdoor unit in a space with limited access to general public.
5. Check to ensure that the foundation is flat, level and sufficiently strong. (Perform the foundation work in order to fix firmly the outdoor unit to avoid inclining, abnormal sound or falling down due to a strong wind or earthquake.)
6. Do not install the outdoor unit where dust or other contaminations could block the outdoor heat exchanger.
7. Provide adequate drainage around the foundation. If installing the unit on a roof or a balcony, provide the additional drainage around the foundation to prevent water dripping on a person or forming ice in winter.
8. Do not install the outdoor unit where a seasonal wind directly blows to the outdoor heat exchanger or where strong winds through the tall buildings directly blows to the outdoor fan.

NOTES:
· Do not install the outdoor unit where there is a
high level of oil mist, flammable gases, salty air or harmful gases such as sulfur and an acid or alkaline environment.
· Do not install the outdoor unit where the
electromagnetic wave is radiated directly to the electrical box.
· Install the outdoor unit as far from the
electromagnetic wave radiator as possible, at least 3 meters away from it.

Seasonal Wind

Air Outlet Hood

Air Inlet Hood

Snow attaches directly to the heat exchanger.

Provide a base which has approximately twice the height of forecast snow accumulation.

3.2 Service Space and Installation Area
Make the service space when outdoor unit is installed as follows. If the service spaces for air inlet and outlet are insufficient, it may cause a performance degradation and some abnormalities due to insufficient air intake. Additionally, the service space is required for facilitating the maintenance.

(Unit: mm)

Min. 1500 h1

1500

Front Side

Rear Side
500

763

Min. 500 + h 2/2

< Side View >

Min. 300 + h 1/2

· In the case of no walls on the front side and
the rear side, the service space is required as follows.

Front Side: Min. 500mm Rear Side: Min. 300mm Right and Left Sides: Min. 10mm (In the case
that the field-supplied snow protection food or the air outlet duct is amounted to the unit, the spaces of min. 50mm are required.)
· If the wall on the front side is over 1,500mm
high, the space of (500 + h2/2) mm for the front side is required.
· If the wall on the rear side is over 500mm high,
the space of (300 + h1/2) mm for the rear side is required.
· When the units are surrounded by walls on
more than 2 sides, the space indicated on the previous page is required.
· For walls on more than 2 sides, secure the
service space as shown in the following figures.
· If the space between the unit and an obstacle
above the unit is less than 1,500mm or the space above the unit is closed, set up the duct at the air outlet side in order to prevent short circuit.
· When there are obstacles above the unit, the
four (front, rear, right and left) sides of the unit shall be open in principle.

1. Walls on 2 Sides
In case that the units are installed adjacent to tall buildings and there are no walls on 2 sides, the minimum rear side space must be 300mm.

· Single Installation

No limit for side wall height.

(Unit: mm)

Min. 10*1)

Min. 300 (Rear Side Space)

3. Selection of Installation Location
· Multiple / Serial Installation
(Unit: mm) No limit for side wall height.

Min. 200

Min. 300 (Rear Side Space)

Front Side Front Side Min. 400
<Top View>
No limit for side wall height.

Min. 300 (Rear Side Space)

Front Side Front Side Min. 400

Min. 500 + h2/2

"" This indicates the direction of the unit (Front Side) when installing the units.

2. Walls on 3 Sides
· Single Installation

(Unit: mm)

Min. 300 + h1/2

Min. 10*1)

Front Side

Min. 500 + h2/2

No limit for side wall height. <Top View>

Front Side
<Top View>
*1): In the case that the field-supplied snow protection hood or the air outlet duct is adopted, the space of minimum 50mm is required.

3. Selection of Installation Location

· Multiple / Serial Installation (Unit: mm) < Installation in the Same Direction >

Min.10*1)

Min. 300 + h1/2

Front Side

Min. 500

Min.20*1)

Front Side

Min.20*1)

Min. 500 + h2/2

No limit for side wall height. <Top View>
< Rear to Rear Installation >

Min.10*1) (Side Space)

Front Side

Min. 500 + h2/2

Min. 900

Min.20*1)

Front Side

Min.20*1)

Min. 500 + h2/2

No limit for side wall height. <Top View>
*1): In the case that the field-supplied snow protection hood or the air outlet duct is adopted, the space of minimum 50mm is required.

3. Walls on 4 Sides
· Single Installation
No limit for side wall height.

Min. 200
Min. 800*2) Open

Front Side

(Unit: mm)
Min. 300 + h1/2 Min. 200 No limit for side wall height.
Min. 500 + h2/2

· Multiple / Serial Installation
(Unit: mm)
<Installation in the Same Direction>

Min. 200
No limit for side wall height.
Min. 800*2) Open

Min. 300 + h1/2

Min. 200

Front Side

Min. 900 No limit for side wall height.

Front Side

Min. 800*2) Open

Min. 200 Min. 200 <Top View>

Min. 500 + h2/2

< Rear to Rear Installation >

Min. 200 (Side Space)

Front Side

Min. 500 + h2/2 Min. 200

No limit for side wall height.
Min. 800*2) Open

Front Side

Min. 1600

No limit for side wall height.

Min. 800*2) Open

Min. 200 Min. 200 <Top View>

Min. 500 + h2/2

*2): Partly open a wall if the unit is surrounded by walls on four sides.

NOTES:
· Keep the upper side open to prevent mutual
interference of inlet and outlet air of each outdoor unit.
· The figure dimensions indicate sufficient
spaces around outdoor units for operation and maintenance at typical installation conditions as follows. [ Operation Mode: Cooling Operation, Outside Temp.: 35 °C ] In case that the outdoor unit ambient temperature is higher and also the short circuit is likely to occur compared to the installation condition, find an appropriate dimension by calculating air flow current.
· For the multiple installation, 1 group shall
consist of 6 outdoor units (max.). Keep 1-meter interval between each unit group.

1 Group (Max. 6 Outdoor Units)

Min. 1m

4. Installation Work 4.1 Transportation and Handling
4.1.1 Transportation
Transport the product as close to the installation location as practical before unpacking. When using a crane, hang the unit according to the description of the label attached to the outdoor unit.
WARNING
· Do not hang the unit with the sling belts at
the wooden base.
CORRECT
Sling Belt

Wooden Base

For Sling Belt and Fork For Fork For Sling Belt

INCORRECT
Sling Belt

Wooden Base
CAUTION
· The unit shall not be handled by one
person. Do not use the PP band to move the unit although the unit is packed by PP band. Additionally, do not touch the heat exchanger with bare hands. The fin of heat exchanger may cause injuries.
· Transportation and Storage
The corrugated paper frame is not sufficiently strong. Therefore, follow the instructions below in order to prevent the unit deformation. Do not step or put any material on the
product. It may cause injury. Apply two sling belts onto the outdoor
unit, when lifting it with a crane.
· Transportation and Wire Rope
To protect the unit, do not remove any packing.
Do not stack or put any material on the product.
Apply wire ropes on both sides of the unit as shown in the figure.

Plastic Bands Corrugated Paper Frame
Do not remove corrugated paper frame and plastic bands.

4. Installation Work
Attach four 15mm thick corrugated corner pads as shown.

Banding Wire Wire ropes should be placed on the le /right side of the plastic bands.

Wooden Base

Take special care when hanging or moving the outdoor unit because its center of mass is eccentric as shown in the figure below.

· Center of Gravity

a d
e b Front Side of Unit

Center of Gravity fc

< CNCCLI >

(mm)

Model

380 - 415V/50Hz 380V/60Hz

abcde f RAS-080CNCCLI 1805 960 775 745 530 335 RAS-100CNCCLI 1805 960 775 745 530 335 RAS-120CNCCLI 1805 960 775 745 530 335 RAS-140CNCCLI 1805 960 775 745 530 335 RAS-160CNCCLI 1805 1220 775 790 635 350 RAS-180CNCCLI 1805 1220 775 790 635 350 RAS-200CNCCLI 1805 1220 775 790 635 350 RAS-220CNCCLI 1805 1610 775 755 825 325 RAS-240CNCCLI 1805 1610 775 755 825 325

RAS-260CNCCLI 1805 1610 775 755 825 325 RAS-280CNCCLI 1805 1610 775 755 825 325 RAS-300CNCCLI 1805 1610 775 755 825 325

4. Installation Work
4.1.2 Handling of Outdoor Unit
· Hanging Method
Hang the unit under packing condition with 2 sling belts as shown in Fig. 4.1.
Do not use a wire rope. Ensure a balance of unit. Check the safety and lift up the unit gently
in order not to incline the unit.

Sling Belt Corrugated Paper Frame
Do not remove corrugated paper frame and plastic bands.
Do not apply any force to surface. (Both Sides)

Min. 2.0m
Angle of sling belt is more than 60o.
Apply sling belt on the splints or corrugated cardboard pads more than 15mm thickness. Wooden Base

When using forklift, do not insert forks into the holes on the unit side. The unit may be damaged.

The holes on the unit side

Forks

Do not apply excessive force to the square holes

with forks or other materials. The bottom of the

unit may be deformed.

· Do not push the bottom base by a fork. · Do not use a roller.

Apply sling belt through the long hole.

Fig. 4.1 Hanging Work for Transportation

(kg)

380 - 415V/50Hz, 380V/60Hz HP
8 10 12 14 16 18 20 22 24 26 28 30

Net Weight

202 207 223 227 271 277 277 360 360 379 379 379

Gross Weight

218 223 239 243 291 297 297 383 383 402 402 402

Hang the unit without wooden base with 2 sling belts as shown in Fig. 4.2.

Sling Belt Corrugated Paper Frame

Min. 2.0m

Do not remove corrugated paper frame.
Do not apply any force to surface. (Both Sides)

Angle of sling belt is more than 60o.
Apply sling belt on the splints or corrugated cardboard pads more than 15mm thickness.

Apply sling belt through the long hole.

Do not apply an excessive force. (Both Sides)
· Wooden Base Removal Method
Remove the hexagon head bolt using the ratchet wrench.
Suspend the unit from the wooden base in its packing with two sling belts.
Ensure safety while hoisting the unit gently to prevent the unit from tipping over as shown in Fig. 4.3.

Ratchet Wrench

CORRECT

INCORRECT Wrench

Outdoor Unit

Wooden Base

Sling Belt Position Sling Belt Long Hole

CORRECT

Sling Belt Long Hole

INCORRECT

Outdoor Unit Wooden Base

Fig. 4.2 Hanging Work without Wooden Base 20

Fig. 4.3 Wooden Base Removal Method

4. Installation Work

NOTE:

· In case of transportation after unpacking,
protect the unit with corrugated paper boards

or cloths.

Outdoor Unit Backrest

Keep distance more than 50mm between the outdoor unit and the backrest.

Mast

Provide concrete foundation as shown in the figure.

Front Side of Unit

Correct

Foot Foundation

Foot

Min. 100mm

Foundation

Min. 100mm

The concrete foundations are installed along the outdoor unit width direction.

Min. 100mm

Min. 100mm (Center of Outdoor Unit)

The concrete foundations are installed along the outdoor unit depth direction.

Fork Outdoor unit is Contacted to Backrest
CAUTION

Outdoor unit is NOT Contacted to Backrest

Do not provide concrete foundation as shown below. The foot of the outdoor unit may be deformed.
Front Side of Unit

· Prevent the outdoor unit from contacting
to the backrest of forklift during transportation. If not, the heat exchanger fin may be broken due to sudden starting or stopping.
WARNING
· Do not put any foreign material into the
outdoor unit and check to ensure that nothing exists in the outdoor unit before the installation and test run. Otherwise, a fire or failure, etc. may occur.
4.2 Outdoor Unit Installation 4.2.1 Foundation · Concrete Foundations
1. The height of the foundation should be over 150mm above the ground.
2. Provide a drainage around the foundation for smooth drainage.

Incorrect
Foot Foundation
The concrete foundations are installed to each corner of the outdoor unit. In this case, the foot of the outdoor unit may be deformed.
3. Install the outdoor unit in the front-rear and rightleft direction horizontally. (Use a level gauge.) Check to ensure that the gradient in four directions (front, rear, right and left) is within 10mm.

Min. 150 100

Details of Anchor Bolt Installing (Example)

83
5 73 20.5

Anchor Bolt (M12) (Field-Supplied) Nut (Field-Supplied) Washer (Field-Supplied) Vibration Proof Mat(Field-Supplied)
The corner of the outdoor unit anchoring foot must be located on the vibration proof mat.
Filling Mortar Hole for Mortar ( 100 x Depth 150) Foundation

Drainage

Min. 100 Drainage (Example) (Width 100 x Depth 20)

(Unit: mm)

Right Side and Left Side

Front Side and Rear Side

4. Provide a strong and correct foundation so that: a. The outdoor unit does not incline. b. Abnormal sound does not occur. c. The outdoor unit will not fall down due to a strong wind or earthquake.

20.5

(729)

20.5

624

770

4. Installation Work
5. When installing the outdoor unit, fix the unit with anchor bolts and vibration proof mat (fieldsupplied). Refer to Fig. 4.4 regarding the location of fixing holes.

· Standard Type (8 to 14 HP)
(Unit: mm)

131 Min.80

688

131

(For Anchor Bolt)

Min.80

729

Hole for M12 Anchor Bolt

(4-18×15 Long Hole)

Vibration Proof Mat

6 Positions (Front and Rear side)

· Standard Type (16 to 20 HP)
(Unit: mm)

131 Min.100

948

131

(For Anchor Bolt)

4.2.2 Drain Water Treatment

Rain water is discharged during raining. Comply with the following conditions.

1. Choose a place where good drainage is available, or provide a drain ditch.
2. Do not install the unit over the walkways. Condensation water may fall on people. In case of installing the unit in such a place, provide the additional drain pan.
3. (When drain piping is necessary for the outdoor unit, use the drain adapter set (Optional, DBSTP10A). Do not use drain adapter and drain pan kit in the cold area. The drain water in the drain pipe may be frozen and then the drain pipe may crack.
NOTE: Even when the drain adapter set is used, the water may drain slightly from the screw holes. Provide a second drain pan under the outdoor unit as necessary.

· Standard Type (8 to 14 HP)

(Unit: mm)

Power Source Wiring Outlet (65 Knockout Hole) Comm. Wiring Outlet (55 Knockout Hole) Comm. Wiring Outlet (33 Knockout Hole)

Hole for Drain (26 x 2 Positions) Positions of Drain Boss (Optional)

(For Anchor Bolt)

Min.80

Hole for M12 Anchor Bolt (4-18×15 Long Hole)

Vibration Proof Mat 6 Positions (Front and Rear side)

Min.120

·
131

Standard Type (22 to 30 HP)

669 (For Anchor Bolt)

(Unit: mm) 131

729

*This hole is not used.
Refrigerant Piping Outlet (Knockout Square Hole)

·
Power Source Wiring Outlet (65 Knockout Hole) Comm. Wiring Outlet (55 Knockout Hole) Comm. Wiring Outlet (33 Knockout Hole)

Standard Type (16 to 20 HP)

(Unit: mm)

Hole for Drain (26 x 2 Positions) Positions of Drain Boss (Optional)

Min.80

Hole for Drain (26 x 2 Positions) Positions of Drain Cap (Optional)
*This hole is Refrigerant Piping Outlet not used. (Knockout Square Hole)

729

(For Anchor Bolt)

Hole for M12 Anchor Bolt Vibration Proof Mat

(6-18×15 Long Hole)

6 Positions (Front and Rear side)

Fig. 4.4 Position of Anchor Bolts

· Standard Type (22 to 30 HP)
Power Source Wiring Outlet (65 Knockout Hole) Comm. Wiring Outlet (55 Knockout Hole)
Comm. Wiring Outlet (33 Knockout Hole)

4. Installation Work
(Unit: mm) Hole for Drain (26 x 2 Positions) Positions of Drain Cap (Optional)
Hole for Drain (26 x 2 Positions) Positions of Drain Boss (Optional)

Refrigerant Piping Outlet (Knockout Square Hole)

*This hole is not used.

Fig. 4.5 Position of Drain Water Treatment

· Drain adapter (Optional Parts)
The drain adapter is for the drain pipe connection in order to use outdoor unit bottom base as a drain pan.

Name Drain adapter

Model DBS-TP10A

Model Parts Name

DBSTP10A

Drain adapter Drain Cap Rubber Cap

Material / Color
PP / Black
PP / Black CR / Black

Q'ty

Application

Connecting for Drain Piping

Embolization for Drain Hole

4 Sealing for Boss and Cap

NOTE:
When installing the unit above a passage way, drain water sometimes turns to ice on a cold morning. Therefore, avoid discharging the water into places which people often pass through, because it is slippery.

When drain piping is necessary for the outdoor unit, use the drain adapter set (Optional, DBS-TP10A). Do not use drain adapter and drain pan kit in the cold area. The drain water in the drain pipe may be frozen and then the drain pipe may crack.

5. Refrigerant Piping Work
5. Refrigerant Piping Work
WARNING
· Use the specified non-flammable refrigerant
R410A to the outdoor unit in the refrigerant cycle. Do not charge material other than R410A into the unit such as hydrocarbon refrigerants (propane or etc.), oxygen, flammable gases (acetylene or etc.) or poisonous gases when installing, maintaining and moving the unit. These flammables are extremely dangerous and may cause an explosion, fire, and injury.
· Check to ensure that no pressure exists
inside the stop valve before removing the flange.
· Make sure that the refrigerant leakage test
is performed. The refrigerant (Fluorocarbon R410A) for this unit is nonflammable, non-toxic and odorless. However, if the refrigerant leaks and contacts fire, toxic gas will generate. Also, because the fluorocarbon is heavier than air, the floor surface will be filled with it, which could cause suffocation.
· For installation, firmly connect the
refrigerant pipe before the compressor starts operating. For maintenance, relocation and disposal, remove the refrigerant pipe after the compressor stops. If the compressor is operated under the condition that the stop valves are opened without refrigerant pipe, it may cause abnormal high pressure in refrigerant cycle and may cause an explosion, fire or injury.
· Before performing any brazing work,
check to ensure that there is no flammable material around. If not, it may cause a fire.
· If the indoor unit is installed in a small room
and the refrigerant gas leakage occurs, the leaked refrigerant gas fills the room and it may cause suffocation. Do not exceed the maximum permissible concentration of the refrigerant gas in the room. Consult with your distributor for an appropriate ventilation system, etc.
· The design pressure for this product is
4.15MPa. The pressure of refrigerant R410A is 1.4 times higher than that of refrigerant R407C. The thickness of copper pipe differs
24

depending on its materials, so use the specified piping. If the specified materials are not used, it may cause explosion, injury, leakage, or fire.
CAUTION
· Ensure to connect the piping among the
units in the same refrigerant cycle.
· Wear leather gloves when handling the
refrigerant. If the refrigerant splashes directly to hands, it may be the cause of frostbite.
· Do not apply excessive force to the flare nut
when tightening it. Otherwise, the flare nut may crack due to aged degradation and refrigerant leakage may occur. Use the specified tightening torque.
NOTICE
· The refrigerant R410A is adopted. The
refrigerant R410A and the refrigerant oil tend 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. Otherwise, foreign materials may get mixed into the cycle from such parts as expansion valve and the operation may be unavailable.
· Perform the drain piping work in order to drain
water securely. If not, the drain water can flow back to the unit and it may cause leakage to the room.
5.1 Piping Materials
1. Prepare locally-supplied copper pipes. 2. Use the phosphorus-deoxidized copper pipe
for refrigerant piping, which is based on the JIS H3300 "Copper and copper alloy seamless pipes and tubes." 3. Select the piping size from Tables 5.1 and 5.2. Pay attention to pipe selection, because the thickness of copper pipe differs depending on its material. 4. Use clean copper pipes. Make sure there is no dust and moisture inside the pipes. Blow nitrogen or dry air into the pipes to remove any dust or foreign materials before connecting pipes. Do not use any tools which produce a lot of swarf such as a saw or a grinder. 5. Take special care to prevent contaminations and

moisture from entering the pipe interior during the piping work. 6. Avoid performing the piping connection work for outdoor unit in the rain.

· Cautions for Refrigerant Pipe Ends

When installing pipe through the wall, secure a cap at the end of the pipe.

Correct

Incorrect

Do not place the pipe directly on the ground.

Correct

Incorrect

Hole

Attach a cap or vinyl tape.

Correct

Incorrect

Rain water can enter.

Attach a cap or vinyl bag with rubber band.

· Brazing Work
1. The brazing work must be performed by an authorized installer in order to prevent any trouble.
2. For piping connection, perform securely non-oxidation brazing with nitrogen substitution. If brazing the pipes without the nitrogen substitution, a large amount of oxidized scale will be generated in the pipes. This oxidized scale may cause clogging in the expansion valve, solenoid valve, accumulator and compressor, which can prevent the unit from operating properly. Do not use field-supplied antioxidant, etc., which may corrode pipes and deteriorate the refrigerant oil.

Brazing Part Nitrogen Gas

Pressure Reducing Valve (Stop Valve)
Nitrogen Gas Pressure < 0.02 MPa

Piping Connection on-site

Pipe Valve (f6.35)

NOTE:

Cover the gap with taping or a rubber plug to prevent air from entering the pipe interior.

Nitrogen Gas

Do not cover the outlet. If the inner pressure exceeds

atmospheric pressure, a pinhole may generate and

the refrigerant gas will leak from the brazing part.

NOTES:
· Make sure to use nitrogen. Nitrogen gas
pressure shall be 0.02 MPa or less. DO NOT use the following gases.
Oxygen: flammable and causes oxidation degradation of the refrigerant oil.
Carbon Dioxide: may cause decrease in drier performance.
Freon Gas: emits harmful gases if exposed to fire.
· Make sure to use the pressure reducing valve. · Do not use field-supplied antioxidant.

5. Refrigerant Piping Work
3. Use a quality brazing filler metal specified in JIS. Select a flux whose chlorine concentration is low.
4. Remove the flux completely after the brazing work.
NOTE:
When the brazing work is performed, perform brazing to minimum portion by appropriate temperature to suppress generating oxidized scale.
· Cautions for Piping Connection Work
1. Connect the indoor and the outdoor units with refrigerant pipes. Fix the pipes and prevent the pipes from contacting weak portions such as wall, ceiling, etc. (Otherwise, abnormal sound may be heard due to vibration of the piping.) NOTE:
When on-site piping with joint such as elbow or socket is buried, provide a service access door to facilitate the check for connecting part. 2. Check that there are no scratch, swarf, deformation, gap, etc. at the flaring part, before the connecting work. 3. Apply refrigerant oil slightly on the sheet surface of the pipe and flare nut before the flaring work. And then tighten the flare nut with the specified tightening torque using two spanners. Perform the flaring work on the liquid piping side before the gas piping side. Check that no gas leakage occurred after the flaring work. NOTE: Refrigerant oil is field-supplied. [Ethereal Oil: FVC68D (Idemitsu Kousan Co. Ltd.)]
Apply Refrigerant Oil.
Do not apply the refrigerant oil to the outside of the flaring part.
4. Be sure to use the accessory flare nuts for indoor unit connections.
5. In case that the temperature and humidity inside the ceiling exceeds 27°C/RH80%, apply additional insulation (approx. 10mm in thickness) to the accessory insulation. It prevents dew condensation on the surface of the insulation (refrigerant pipe only).
6. Perform the air-tight test (4.15MPa for the test pressure).
7. Perform cold insulation work by insulating and taping the flare connection and reducer connection. Also insulate all the refrigerant pipes.
25

5. Refrigerant Piping Work

· When tightening the flare nut, use two
spanners.

Required Tightening Torque (JIS B8607)

Pipe Size (mm)

Tightening Torque (N·m)

6.35

(1/4)

14 to 18

9.52

(3/8)

34 to 42

12.7

(1/2)

49 to 61

15.88 (5/8)

68 to 82

19.05

(3/4)

100 to 120
Do not put two spanners here. Refrigerant leakage may occur.

Two Spanners Work Tightening Work for Stop Valve (Liquid)

Table 5.1 Piping Size of Outdoor Unit

<2 Pipes System>

(Standard Type)

Outdoor Unit HP

Gas

(mm) Liquid

19.05

9.52

22.2

9.52

12, 14

25.4

12.7

28.58

12.7

18 - 24

28.58

15.88

26 - 34

31.75

19.05

36 - 54

38.1

19.05

56 - 66

44.45

19.05

68 - 72

44.45

22.2

74 - 88

50.8

22.2

90 - 96

50.8

25.4

98 - 112

54.0

25.4

114 - 120

54.0

28.58

Table 5.2 Piping Size of Indoor Unit

Indoor Unit HP
1.5 or less 2.0, 2.3 2.5 to 6.0 8.0 10.0 16.0 20.0

Diameter (mm)

Gas Pipe 12.7

Liquid Pipe 6.35 *1

12.7 *2

6.35 *1

15.88

9.52

19.05

9.52

22.2

9.52

28.58

12.7

28.58

15.88

*1. When the liquid piping length is longer than 15m, use 9.52 pipe and a reducer (field-supplied).
*2. As for some of the indoor unit types, if 12.7 pipe is not available, 15.88 pipe should be used. Make sure to check the indoor unit specifications.
· Piping Thickness and Material
Use the pipe as below. The thickness of refrigerant pipe differs depending on design pressure. For copper pipe, pay attention to pipe selection, because the piping thickness differs depending on its material.

Outer Diameter
6.35 9.52 12.7 15.88
19.05
22.2 25.4 28.58 31.75 34.92 38.1 41.28 44.45 50.8 54.0

(mm)

R410A

Thickness

Material

0.8

O material

0.8

O material

0.8

O material

1.0

O material

1.2

O material

1.0

1/2H material

1.0

1/2H material

1.0

1/2H material

1.0

1/2H material

1.1

1/2H material

1.2

1/2H material

1.35

1/2H material

1.4

1/2H material

1.55

1/2H material

1.5

1/2H material

1.5

H material

5.2 Flaring and Joint

· Flaring Dimension
Perform the flaring work as shown below.

(mm)

90° ± 2° 45° ± 2°
A

Diameter (d)

+0 A -0.4 R410A

6.35

9.1

9.52

13.2

R0.4 ~ R0.8

12.7

16.6

15.88

19.7

19.05

- *1

*1. It is impossible to perform the flaring work with 1/2H material. In this case, use an accessory pipe (with a flare).

· Joint Selection
If 1/2H material is used, the flaring work cannot be performed. In this case, use a joint selected from the table below.

< Minimum Thickness of Joint (mm) >

Diameter

R410A

6.35

0.5

9.52

0.6

12.7

0.7

15.88

0.8

19.05

0.8

22.2

0.9

25.4

0.95

28.58

1.0

31.75

1.1

34.92

1.2

38.1

1.35

41.28

1.45

44.5

1.55

50.8

1.65

54.0

1.75

NOTE:

· Do not use a thin joint other than the
ones in the table.

< Flare Nut Dimension B (mm) >

Flare Nut

Diameter 6.35 9.52 12.7 15.88 19.05

R410A 17 22 26 29 36

· Processing at Brazing Connection
To prevent gas leakage at the brazing connection, refer to the table for the insertion depth and the gap for joint pipe.
B

ID IA

(mm)

Diameter (D)
5 D< 8 8 D < 12 12 D < 16 16 D < 25 25 D < 35 35 D < 45 45 D

Min. Insertion Depth (B) 6 7 8 10 12 14 16

Gap (A - D) 0.05 - 0.35
0.05 - 0.45
0.05 - 0.55 0.05 - 0.6

5. Refrigerant Piping Work
5.3 Caution about Outdoor Unit Installation
When the installation and piping work for the multiple outdoor units are performed, it is required that the arrangement for outdoor units and piping length be determined. Perform securely the installation work according to the following restrictions. If the arrangement for outdoor units is incorrect, it may cause flow back of the refrigerant and result in failure of outdoor unit.

<Restrictions for 2 and 3 Unit Combination>
1. For 2 and 3 outdoor units combination, align the outdoor units from largest capacity to smallest as A > B > C and outdoor unit "A" should be connected to the piping connection kit 1.
2. The piping length between the piping connection kit 1 and the outdoor unit should be La < Lb < Lc < 25m.
3. For maintenance, attach "Main unit label" to the service cover (back side surface) of the outdoor unit "A".

A >B>C

Outdoor Unit A

Outdoor Unit Outdoor Unit

Piping Outlet Direction

Indoor Unit

Side

Piping Connection Kit 2

Piping

Connection Kit 1

: Keep the straight-line distance of 500mm or more for piping a er the piping connection kit.

C <B < A

Outdoor Unit Outdoor Unit

Outdoor Unit A

Piping Outlet Direction

Piping Connection Kit 2

Indoor Unit Side
Piping Connection Kit 1

: Keep the straight-line distance of 500mm or more for piping a er the piping connection kit.
27

5. Refrigerant Piping Work

<Restrictions for 4 Unit Combination>
1. For 4 outdoor unit combination, align the outdoor units from largest capacity to smallest as A > B > C > D. The outdoor units "A" and "B" should be connected to the piping connection kit 2 and the outdoor units "C" and "D" should be connected to the piping connection kit 3.
2. The piping length between the piping connection kit 1 and each outdoor unit should be La < Lb < Lc < Ld < 25m.
3. For maintenance, attach the main unit label to the service cover (back side surface) of the outdoor unit "A".
A > B> C > D

Piping Outlet Direction

Outdoor Unit A

Outdoor Unit Outdoor Unit Outdoor Unit

Indoor Unit Side

5.4.1 Removing of Closing Pipes
Step1. Make sure that all the valve stems are closed completely.
Step2. Connect the charging hose to the service port and release the gas inside the piping from the gas pipe.
Step3. Cut the end of the closing pipe and check that no gas exists inside the gas pipe.
Step4. Remove the stop valve cover. Step5. Remove the closing pipe from the brazing
portion with a burner. Pay attention to the flame from the burner not to burn the stop valve body.

Liquid Valve

Service Port Gas Valve

Stop Valve Cover (Read the precautions.)

Piping Connection Kit 1

Piping Connection Kit 2

Piping Connection Kit 3

: Keep the straight-line distance of 500mm or more for piping a er the piping connection kit.

D<C< B < A

Outdoor Unit Outdoor Unit Outdoor Unit

Outdoor Unit A

Piping Outlet Direction
Indoor Unit Side

Cutting Portion (6.35 Pipe) Cut Here

End of Closing Pipe (6.35) Closing Pipe

Heat Exchanger Fin Heat Exchanger
Metal Plate for Protection
Closing Pipe

Liquid Valve Gas Valve (Body)
Field Piping Connecting Portion of Gas Valve
Valve Stay
Burner

Piping Connection Kit 3

Piping Connection Kit 2

Piping Connection Kit 1

: Keep the straight-line distance of 500mm or more for piping a er the piping connection kit.

5.4 Piping Connection Work
Comply with the restrictions for refrigerant piping (permissible length, height difference) in item 5.4.2 Piping Connection Method. If not, the outdoor unit may be damaged or fail. The stop valves shall be closed completely (factory setting) when the refrigerant piping connection is performed. Do not open the stop valves until all the refrigerant piping connections, air-tight test and vacuuming have been completed.
28

Fig. 5.1 Brazing of Closing Pipe
CAUTION
· Ensure that there is no gas inside the pipe
when removing the closing pipe. Otherwise, the pipe may be blown out and it may lead to injury.
· Do not expose surrounding parts and the
oil return pipe of the compressor to flames when torch is used. If the oil return piping is exposed to the fire, high temperature oil will spurt and cause a fire or injury.

<Liquid Valve> Tighten the flare nut for liquid stop valve according to the following torque. If an excessive force is applied to the flare nut, the refrigerant leakage may occur from the spindle part. (Put two spanners at the positions indicated in the figure when removing and connecting the piping. If not, the refrigerant leakage may occur.)

5. Refrigerant Piping Work
· The details of stop valves is as follows.
<Gas Valve>
Cap (Check the shape)

Type HP Tightening Torque (N·m) Valve Type

8 - 14

33 - 42

Standard 16 - 20

50 - 62

22 - 30

68 - 84

Do not put two spanners here. Refrigerant leakage may occur.

Hexagonal Wrench Wrench Size:10mm
Cap Tightening Torque: 42.0 - 48.0 N-m
Spindle Valve Counterclockwise...Open Clockwise...............Close Tightening Torque: 22.0 - 28.0 N-m

Check Joint for Service Port
Tightening Torque: 9.0 - 14.0 N-m

Refrigerant Pressure

Two Spanners Work Tightening Work for Stop Valve (Liquid)
Do not put two spanners here.

Flare Nut Flare Nut

Flare Nut

Check Joint for Service Port
Only the charging hose can be connected. Tightening Torque: 14.0 - 18.0 N-m

Cap Tightening Torque: (b) N-m

Hexagonal Wrench To open or close spindle valve
Wrench Size: (e)

O-ring

Spindle Valve
Counterclockwise...Open Clockwise...............Close Tightening Torque: (c) N-m

Refrigerant Piping

Refrigerant Pressure
Flare Nut Tightening Torque: (d) N-m

Put two spanners here.
CAUTION · Do not apply an excessive force to the
spindle valve after fully opening the spindle. The back seat construction is not provided.
· At the test run, fully open the spindle. If
it is not fully opened, the devices will be damaged.

Outdoor Unit (Base Unit)

Tightening Torque (N·m)

Wrench

Cap Spindle Valve Flare Nut Size

(b)

(c)

(d) (e) (mm)

8 - 14 33.0 - 42.0 7.0 - 9.0 33.0 - 42.0 4

Standard Type

16 - 20

33.0 - 42.0

7.0 - 9.0 50.0 - 62.0

22 - 30 50.0 - 62.0 9.0 - 11.0 68.0 - 84.0 5

CAUTION
· Do not apply excessive force to the spindle
valve after fully opening the spindle. The back seat construction is not provided.
· At the test run, fully open the spindle. If
it is not fully opened, the devices will be damaged.
29

5. Refrigerant Piping Work

5.4.2 Piping Connection Method

Perform the piping connection work for each outdoor unit. NOTE:
· Ensure that the refrigerant pipe should be connected to the same refrigerant cycle unit.

Prepare the refrigerant pipe in the field for the piping work. Refer to Fig. 5.2 for the position of piping connection.

Unit (mm)

Communication Wiring Outlet (I33 Knockout Hole)

Communication Wiring Outlet

(I55 Knockout Hole)

Gas Piping Connection A

Liquid Piping Connection B

Piping Cover

E (Liquid Piping Connection) F (Gas Piping Connection) 293 288 133 100

G (Liquid Piping Connection)

H (Gas Piping Connection)

Power Source Wiring Outlet

(I65 Knockout Hole)

Gas Piping and Liquid Piping Outlet

(Knockout Square Hole)

127 This hole is not used.

The figures illustrate the examples of a small cabinet.

< CNCCLI >

Model

Piping Diameter

Dimension (mm)

Gas Liquid A

RAS-080CNCCLI 19.05 9.52 RAS-100CNCCLI 22.2 9.52 RAS-120CNCCLI 25.4*1 12.7 22.2 9.52 269 331 268 163 117 131 240 225 305 RAS-140CNCCLI 25.4*1 12.7 RAS-160CNCCLI 28.58 12.7

RAS-180CNCCLI 28.58 15.88 25.4 12.7 178 239 263 160 112 130 147 132 212

RAS-200CNCCLI 28.58 15.88

RAS-220CNCCLI 28.58 15.88

RAS-240CNCCLI 28.58 15.88

RAS-260CNCCLI 31.75*2 19.05 28.58 15.88 177 239 259 160 132 152 147 132 212 RAS-280CNCCLI 31.75*2 19.05 RAS-300CNCCLI 31.75*2 19.05

*1. If 25.4 piping is not available, use 28.58 piping and a reducer (field-supplied). *2. If 31.75 piping is not available, use 34.93 piping and a reducer (field-supplied).

Fig. 5.2 Position of Piping Connection

· Piping Direction
Fix the pipes adequately in order to avoid vibration and excessive force to the valve.
Step1. The pipes can be installed in four directions (front, rear, right or bottom side). For vibration protection, properly fix the piping connection and check that no excessive force is applied to the stop valve.

Front Side

Bottom Side

Bottom Base Rear Side

Step2. Operation of the stop valve should be performed according to item 5.4.1.
Step3. Connect the pipes according to Fig. 5.2. Step4. Completely seal the penetration part at
the bottom of the pipes with insulation in order to prevent rain water from entering the conduit.

For Piping from Bottom Base

Liquid Pipe

Communication Wiring

Gas Pipe

Power Source Wiring

Cover gaps with packings (field-supplied). Install accessory rubber bushes to the wiring outlets.
For Piping from Front or Rear Side Piping Cover Cover gaps with packings (field-supplied). Install accessory rubber bushes to the wiring outlets.
Piping Cover

Power Source Wiring

Liquid Pipe

Communication Wiring Gas Pipe

5. Refrigerant Piping Work

NOTICE

· After removing the pipes and completing
insulation work, cover the gap between the pipe cover and the pipes with packing (field-supplied). If the gap is not covered, the unit may be damaged if snow, rain water or animals enter the unit.

5.4.3 Piping Connection

After connecting the pipes, remove the caps of stop valves for gas and liquid. Tighten the open-close spindle in the closing direction according to the following tightening torque.

Step1. Make sure that the stop valves are closed completely.

Step2. Protect the compressor and sound-proof cover with a metal plate when brazing the gas pipe as shown in Fig. 5.1. Pay attention to the flame from the burner not to burn the stop valve body.
Step3. Connect the indoor unit and outdoor units with refrigerant piping. Fix the pipes and take special care not to contact with weak portions such as wall, ceiling, etc. (Otherwise, abnormal sound may be heard due to vibration of the piping.)

NOTE:
· When on-site piping with joint such
as elbow or socket is buried, provide a service access door to facilitate the check for connecting part.

Step4. As for the flaring work of the field pipe, use the specified tightening torque in Table 5.3. Put nitrogen gas into the pipe when brazing the piping.
Step5. Insulate the gas pipe and liquid pipe completely.
Step6. Mount the piping cover equipped with the outdoor unit after the piping connection. If not, the unit may be damaged due to snow or rain water entering the piping.

Table 5.3 Tightening Work of Flare Nut

Required Tightening Torque

(JIS B8607)

Pipe Size mm (in)

Tightening Torque (N·m)

6.35 9.52 12.7 15.88 19.05

(1/4)

14 to 18

(3/8)

34 to 42

(1/2)

49 to 61

(5/8)

68 to 82

(3/4)

100 to 120

5. Refrigerant Piping Work
· When connecting the indoor unit and outdoor
unit refrigerant pipes, the refrigerant pipes must be supported appropriately. Do not let them come into contact with the weak strength portion of a wall or a ceiling. If not, it may cause abnormal sound due to piping vibration.
· Precautions during installing and fixing the
pipes.
< Example of Support Direction >

Outdoor Unit
Piping Support Parts (to support pipes at appropriate intervals)

Fireproof Compartment Construction

Indoor Unit

Multi-Kit Install multi-kits horizontally.

CORRECT
within + 15o

INCORRECT

< Supporting Liquid Piping and Gas Piping >

Gas Piping

Piping Supporting Parts

Liquid Piping
NOTE: Temperature changes in refrigerant during operation of the unit can cause pipes to expand or contract. Tying the gas piping and liquid piping together with taping may cause piping deformation.

Example: Recommended

From each Indoor Unit to Multi-Kit, use hard copper pipes that bend to prevent kinking.

Hard Copper Piping will expand and contract due to temperature changes in piping.

Multi-Kit

Connection Pipe

Bending Pipe

Outdoor Unit Multi-Kit Install Horizontally

Indoor Unit

NOTICE:
When on-site piping is installed using so or hard copper, make sure that the piping is installed to allow for movement of the piping. Temperature changes cause contraction and expansion of the piping.

NOTE:
· When on-site piping with joint such as elbow or
socket is buried, provide a service access door to facilitate a check of connecting parts.

CAUTION

· Do not apply excessive force to the flare nut
when tightening it. Otherwise, the flare nut may crack due to aged deterioration and refrigerant leakage may occur. Use the specified tightening torque.

· Details of Stop Valve Piping Connection
< CNCCLI >

RAS-080CNCCLI

RAS-100CNCCLI

Stop Valve (Liquid)
Flaring
Liquid Pipe (Field-Supplied)

Stop Valve (Gas)

Stop Valve (Liquid)

Flaring

90o Elbow B

Liquid Pipe

(Field-Supplied) (Field-Supplied)

Stop Valve (Gas)
90o Elbow A (Field-Supplied)

Accessory Pipe (Gas Line)

Gas Pipe (Field-Supplied)

RAS-120CNCCLI

RAS-140CNCCLI

Stop Valve (Liquid)
Flaring Accessory Pipe (Liquid Line)
90o Elbow A (Field-Supplied)

Stop Valve (Gas)

Stop Valve (Liquid)

90o Elbow B (Field-Supplied)

Flaring
Liquid Pipe (Field-Supplied)

Accessory Pipe (Gas Line)

Stop Valve (Gas)
90o Elbow A (Field-Supplied)
Gas Pipe (Field-Supplied)

RAS-160CNCCLI

RAS-180, 200CNCCLI

Stop Valve (Liquid)
Flaring
Liquid Pipe (Field-Supplied)

Stop Valve (Gas)

Stop Valve (Liquid)

90o Elbow B (Field-Supplied)
Accessory Pipe (Gas Line)

Flaring
Accessory Pipe (Liquid Line) 90o Elbow A (Field-Supplied)

Stop Valve (Gas)
90o Elbow B (Field-Supplied)
Accessory Pipe (Gas Line)

RAS-220, 240CNCCLI

RAS-260, 280, 300CNCCLI

Stop Valve (Liquid)
Flaring
Liquid Pipe (Field-Supplied)

Stop Valve (Gas)

Stop Valve (Liquid)

Flaring

90o Elbow A (Field-Supplied)
Gas Pipe (Field-Supplied)

Accessory Pipe (Liquid Line) 90o Elbow A (Field-Supplied)

Stop Valve (Gas)
90o Elbow B (Field-Supplied)
Accessory Pipe (Gas Line)

NOTES:
· Ensure that the closing pipe of the gas stop
valve is removed firstly.
· Refer to item 5.2 for the flaring work.

NOTICE

· When connecting the outdoor unit gas stop
valve and the field-supplied refrigerant pipe, do not apply excessive force to the stop valve pipe as illustrated below. This may loosen the stop valve spindle.

5. Refrigerant Piping Work
· Construction Example
The following figures show the examples of 3 unit combination. Regarding the piping work for Combination Unit, refer to Installation and Maintenance Manual attached to the piping connection kit.

Front Side Piping Connection

Liquid Piping (Field-Supplied)

Piping Connection Kit 1 (Liquid)
Accessory Pipe (L-Shape)

Perform the piping connection between outdoor units according to this figure.
Outdoor Unit A

Gas Piping (Field-Supplied)
Piping Connection Kit 1 (Gas)

Accessory Pipe (L-Shape)

Outdoor Unit B

Accessory Pipe (L-Shape)
Liquid Piping (Field-Supplied)
Gas Piping (Field-Supplied)
Piping Connection Kit 2 (Gas)

Accessory Pipe (L-Shape)
Gas Piping (Field-Supplied)
Piping Connection Kit 2 (Liquid)

Liquid Piping (Field-Supplied)

Outdoor Unit C Foundation

View from P

Connecting Piping (Field-Supplied)

Keep the same heights when removing the gas piping and the liquid piping from the piping cover.

min.500mm

Connecting Piping (Attached to Piping Connection Kit)

Downward Piping Connection

Perform the piping connection between outdoor units according to this figure.

Base (Field-Supplied)
Gas Piping (Field-Supplied)
Liquid Piping (Field-Supplied)

Accessory Pipe (Z-Shape)

Outdoor Unit A
Liquid Piping (Field-Supplied)
Accessory Pipe (Z-Shape)

Outdoor Unit B
Liquid Piping (Field-Supplied)

Outdoor Unit C

Piping Connection Kit 1 (Liquid)
Piping Connection Kit 1 (Gas)

Accessory Pipe (L-Shape)
Gas Piping (Field-Supplied)

Piping Connection Kit 2 (Liquid)

Accessory Pipe (L-Shape)

Piping Connection Kit 2 (Gas)

Gas Piping (Field-Supplied)

NOTE:

· The figure shows the case that the refrigerant pipes are pulled out from the front side piping cover.
They can be also pulled out from the bottom base hole. 33

5. Refrigerant Piping Work

5.5 Piping Work between Outdoor Units
The optional piping connection kit is required to combine base units. It is NOT required for the base units.

Indoor Unit Side

Outdoor Unit A

Outdoor Unit B

Outdoor Unit C

Outdoor Unit D

< Standard Type: RAS-080 to H20CNCCLI>

Applicable Outdoor Unit
Outdoor Outdoor Unit Unit
HP Number

Model

32 - 48 2 MC-NP21SA1

50 - 60 2

MC-NP22TA

62 - 90 3

MC-NP31TA

92 - 120 4

MC-NP40TA

Piping Set

Remarks

for Gas: 1 for Liquid: 1

for Gas: 2 for Liquid: 2

for Gas: 3 for Liquid: 3

Select the pipe size according to items 5.5.1 to 5.5.4 "Piping Size between Outdoor Units". For refrigerant piping work, the optional piping connection kit is required to branch the pipe between outdoor units. The arrangement for outdoor units should be determined depending on the piping direction when the refrigerant piping work and installation work are planned. When the outdoor unit is installed, perform the installation work according to the following restrictions.

1. Piping length between piping connection kit 1 and each outdoor unit should be LA < LB < LC < 25m, LD - LA 10m, LC - LA 10m, LB - LA 10m. Keep the straight-line distance of 500mm or more after the piping connection kit 1.

Piping Connection Kit 1

Piping Connection Kit 2

Piping Connection Kit 3

Keep the straight-line distance of 500mm or more for piping a er the piping connection kit.

Outdoor Unit A

Outdoor Unit B

Outdoor Unit C

Upstream Side

Outdoor Unit D

The height difference between outdoor units must be 2.0m or less. If it exceeds 100mm, follow 7.*1

Indoor Unit Side

Piping

Connection Kit 2

Connection Kit 1

Piping Connection Kit 3

*1. Refer to 7. on page page 36.
2. Place the piping connection kit lower than the outdoor unit piping connection. In case that the piping connection kit is placed higher than the outdoor unit piping connection, keep 300mm (max.) between the piping connection kit and the bottom of the outdoor unit. Also, provide the oil trap (min. 200mm) for the gas piping between the piping connection kit and the outdoor unit.

CORRECT

Outdoor Unit A
Indoor Unit Side LA

Outdoor Unit B

Outdoor Unit C

Indoor Unit Side INCORRECT

Piping Connection Kit 1

Keep the straight-line distance of 500mm or more for piping a er the piping connection kit.

Outdoor Unit A

Indoor Unit Side Piping Connection Kit 1

Piping Connection Kit 2

Outdoor Unit B

Upstream Side

Outdoor Unit C

The height difference between outdoor units must be 2.0m or less. If it exceeds 100mm, follow 7.*1

Piping Connection Kit 2

Indoor Unit Side The refrigerant oil is stagnated to the unit stopped.

CORRECT
Oil Trap Min. 200mm
Indoor Unit Side

Oil Trap Min. 200mm

Max. 300mm

Oil Trap Min. 200mm
Max. 300mm

CORRECT
Indoor Unit Side

INCORRECT
Indoor Unit Side

The refrigerant oil is stagnated to the unit stopped.

CORRECT

Oil Trap Min. 200mm Indoor Unit Side
Max. 300mm

Oil Trap Min. 200mm
Max. 300mm

Oil Trap Min. 200mm

Max. 300mm

The refrigerant oil stagnates in the stopped outdoor unit during system operation.
3. Install an oil trap for the gas piping when the piping length between the piping connection kits, or the outdoor unit and the piping connection kit is 2m or more to prevent any accumulation of refrigerant oil.
· Less than 2m
CORRECT

Indoor Unit Side
Less than 2m
· 2m or more
CORRECT

Less than 2m

Indoor Unit Side

Oil Trap Min. 200mm

Less than 2m
2m or more

Less than 2m
25m or less

2m or more

5. Refrigerant Piping Work
· Less than 2m
CORRECT

Indoor Unit Side

Less than 2m

Less than 2m Less than 2m

· 2m or more

CORRECT

Less than 2m

Indoor Unit Side

Oil Trap Min. 200mm

Less than 2m

2m or more

Less than 2m

2m or more

25m or less

Less than 2m
2m or more

4. Place the outdoor unit pipe horizontally or with the pipe slanted downward towards the indoor unit side so that accumulation of refrigerant oil may not occur in the pipe.

INCORRECT

Indoor Unit Side

Refrigerant oil accumulates in the pipe. CORRECT

Indoor Unit Side
INCORRECT
Indoor Unit Side

CORRECT
Indoor Unit Side

Refrigerant oil accumulates in the pipe.

5. Refrigerant Piping Work
5. For servicing, in case that the pipe is placed frontward of the outdoor unit, secure min. 500mm between the outdoor unit and piping connection kits. (When the compressor is replaced, a space of min. 500mm is required.)
Outdoor Unit Outdoor Unit Outdoor Unit

INCORRECT

100mm or more

Outdoor Unit A

Outdoor Unit B

Min. 500mm

Piping Connection Kit

Outdoor Unit Outdoor Unit Outdoor Unit Outdoor Unit

Min. 500mm

Piping Connection Kit

6. Direction of Piping Connection Kit Place the piping connection kit parallel to the ground (the slope must be within +15°) as shown in the figure.

CORRECT

INCORRECT

within + 15o

NOTICE
· The refrigerant system may be damaged if the
slope of the piping connection kit exceeds ±15°.
7. When the height difference between the outdoor units exceeds 100mm, there are restrictions depending on the number of connected outdoor units. Incorrect positioning of the outdoor units may cause failure of outdoor units due to flowing back of the refrigerant. a. Two Outdoor Unit Combination Outdoor Unit A must be lower than Outdoor Unit B.
CORRECT

Outdoor Unit A

Outdoor Unit B

Max. 2m

b. Three Outdoor Unit Combination Two outdoor units must be lower than the third outdoor unit.
CORRECT

Outdoor Unit A

Outdoor Unit B

Outdoor Unit C

Max. 2m

NOTE: The example shows Outdoor Units A and B
are lower than Outdoor Unit C.
INCORRECT

Outdoor Unit A

Outdoor Unit B

Outdoor Unit C

100mm or more

c. Four Outdoor Unit Combination Three outdoor units must be lower than the fourth outdoor unit.
CORRECT

Outdoor Unit A

Outdoor Unit B

Outdoor Unit C

Outdoor Unit D

Max. 2m

NOTE: The example shows Outdoor Units A , B and C
are lower than Outdoor Unit D.

INCORRECT

Outdoor Unit A

Outdoor Unit B

Outdoor Unit C

Outdoor Unit D

100mm or more

5.5.1 Piping Size between Outdoor Units (Base Unit)
· Standard Type: RAS-080 to 300CNCCLI
Outdoor Unit

5. Refrigerant Piping Work

a To Indoor Units

Refrigerant Piping

Standard Type: RAS-080 to 300CNCCLI

Model

RAS080CNCCLI

Gas Piping Size a
Liquid

19.05 9.52

RAS100CNCCLI
22.2
9.52

RAS120CNCCLI
25.4*1
12.7

RAS140CNCCLI
25.4*1
12.7

RAS160CNCCLI
28.58
12.7

RAS180CNCCLI
28.58
15.88

(mm) RAS200CNCCLI 28.58
15.88

Model Piping Size a

RAS220CNCCLI Gas 28.58
Liquid 15.88

RAS240CNCCLI
28.58
15.88

RAS260CNCCLI
31.75*2
19.05

RAS280CNCCLI
31.75*2
19.05

RAS300CNCCLI
31.75*2
19.05

*1. If 25.4 piping is not available, use 28.58 piping and a reducer (field-supplied). *2. If 31.75 piping is not available, use 34.93 piping and a reducer (field-supplied).

5.5.2 Piping Size between Outdoor Units (2 Unit Combination)
· Standard Type: RAS-320 to 600CNCCLI

(Indoor Unit on Left Side)

Outdoor Unit A

Outdoor Unit B

(Indoor Unit on Right Side)

Outdoor Unit B

Outdoor Unit A

a To Indoor Units

Piping Connection Kit 1

Piping Connection Kit 1 To Indoor Units

5. Refrigerant Piping Work

Standard Type: RAS-320 to 600CNCCLI

(mm)

Model

RAS-

320CNCCLI 340CNCCLI 360CNCCLI 380CNCCLI 400CNCCLI 420CNCCLI 440CNCCLI

Outdoor Unit A Comb. Unit
Outdoor Unit B

RAS180CNCCLI
RAS140CNCCLI

RAS180CNCCLI
RAS160CNCCLI

RAS180CNCCLI
RAS180CNCCLI

RAS220CNCCLI
RAS160CNCCLI

RAS220CNCCLI
RAS180CNCCLI

RAS240CNCCLI
RAS180CNCCLI

RAS220CNCCLI
RAS220CNCCLI

Piping Connection Kit

MC-NP21SA1

Gas a
Liquid

31.75*1 19.05

38.1*2 19.05

Piping Size

Gas Liquid
Gas Liquid

Refer to item 5.5.1 for the piping size for the base units to be combined.

Model

RAS-

460CNCCLI 480CNCCLI 500CNCCLI 520CNCCLI 540CNCCLI 560CNCCLI 580CNCCLI 600CNCCLI

Outdoor Unit RAS-

RAS-

Comb.

240CNCCLI 240CNCCLI 260CNCCLI 260CNCCLI 280CNCCLI 280CNCCLI 300CNCCLI 300CNCCLI

Unit Outdoor Unit RAS-

RAS-

220CNCCLI 240CNCCLI 240CNCCLI 260CNCCLI 260CNCCLI 280CNCCLI 280CNCCLI 300CNCCLI

Piping Connection Kit

MC-NP21SA1

MC-NP22TA

Gas a
Liquid

Piping Size b

Gas

Liquid

38.1*2 19.05

44.45*3 19.05

Refer to item 5.5.1 for the piping size for the base units to be combined.

c Gas

*1. If 31.75 piping is not available, use 34.93 piping and a reducer (field-supplied). *2. If 38.1 piping is not available, use 41.28 piping and a reducer (field-supplied). *3. If 44.45 piping is not available, use 41.28 piping and a reducer (field-supplied).

NOTE:
· Perform the installation of the outdoor unit and piping connection according to the figure.
Refer to the table for the outdoor unit model, the piping connection kit model and the piping diameter.
5.5.3 Piping Size between Outdoor Units (3 Unit Combination)
· Standard Type: RAS-620 to 900CNCCLI

(Indoor Unit on Left Side)

(Indoor Unit on Right Side)

Outdoor Unit A

Outdoor Unit B Outdoor Unit C

Outdoor Unit C

Outdoor Unit B

Outdoor Unit A

Piping Connection Kit 1 To Indoor Units

d e
Piping Connection Kit 2

Piping Connection Kit 2 Piping Connection Kit 1

a To Indoor Units

5. Refrigerant Piping Work

Standard Type: RAS-620 to 900CNCCLI

(mm)

Model

Outdoor Unit A

Combination Unit

Outdoor Unit B

Outdoor Unit C

RAS620CNCCLI
RAS220CNCCLI
RAS220CNCCLI
RAS180CNCCLI

RAS640CNCCLI
RAS240CNCCLI
RAS220CNCCLI
RAS180CNCCLI

RAS660CNCCLI
RAS240CNCCLI
RAS240CNCCLI
RAS180CNCCLI

RAS680CNCCLI
RAS240CNCCLI
RAS220CNCCLI
RAS220CNCCLI

RAS700CNCCLI
RAS240CNCCLI
RAS240CNCCLI
RAS220CNCCLI

RAS720CNCCLI
RAS240CNCCLI
RAS240CNCCLI
RAS240CNCCLI

RAS740CNCCLI
RAS260CNCCLI
RAS240CNCCLI
RAS240CNCCLI

Piping Connection Kit

MC-NP31TA

Gas a
Liquid

44.45*2 19.05

44.45*2 22.2

50.8*3 22.2

Gas b
Liquid

38.1*1 19.05

Gas Piping Size c
Liquid

Gas d
Liquid

Refer to item 5.5.1 for the piping size for the base units to be combined.

Gas e
Liquid

(mm)

Model

RAS-

760CNCCLI 780CNCCLI 800CNCCLI 820CNCCLI 840CNCCLI 860CNCCLI 880CNCCLI 900CNCCLI

Outdoor Unit A

RAS260CNCCLI

RAS280CNCCLI

RAS300CNCCLI

Combination Unit

Outdoor Unit B

RAS260CNCCLI

RAS-

260CNCCLI 260CNCCLI

RAS-

280CNCCLI 280CNCCLI

RAS-

280CNCCLI 300CNCCLI

RAS300CNCCLI

Outdoor Unit C

RAS240CNCCLI

RAS260CNCCLI

RAS280CNCCLI

RAS300CNCCLI

Piping Connection Kit

MC-NP31TA

Gas a
Liquid

50.8*3 22.2

50.8*3 25.4*4

Gas b
Liquid

38.1*1 19.05

44.45*2 19.05

Piping Size c

Gas Liquid

Gas d
Liquid

Refer to item 5.5.1 for the piping size for the base units to be combined.

Gas e
Liquid

*1. If 38.1 piping is not available, use 41.28 piping and a reducer (field-supplied). *2. If 44.45 piping is not available, use 41.28 piping and a reducer (field-supplied). *3. If 50.8 piping is not available, use 54.0 piping and a reducer (field-supplied). *4. If 25.4 piping is not available, use 28.58 piping and a reducer (field-supplied).
NOTE:
· Perform the installation of the outdoor unit and piping connection according to the figure.
Refer to the table for the outdoor unit model, the piping connection kit model and the piping diameter.

5. Refrigerant Piping Work 5.5.4 Piping Size between Outdoor Units (4 Unit Combination)
· Standard Type: RAS-920 to H20CNCCLI

(Indoor Unit on Left Side)
Outdoor Unit A

Outdoor Unit B

Outdoor Unit C Outdoor Unit D

Piping Connection Kit 1

e c

Piping Connection Kit 2

To Indoor Units

Piping Connection Kit 3

(Indoor Unit on Right Side)
Outdoor Unit D Outdoor Unit C

Outdoor Unit B

Outdoor Unit A

Piping Connection Kit 3

Piping

Connection

Kit 1

Piping Connection Kit 2

To Indoor Units

5. Refrigerant Piping Work

Standard Type: RAS-920 to H20CNCCLI

(mm)

Model

Outdoor Unit A

Combination Unit

Outdoor Unit B Outdoor Unit C

Outdoor Unit D

RAS920CNCCLI
RAS240CNCCLI
RAS240CNCCLI
RAS220CNCCLI
RAS220CNCCLI

RAS940CNCCLI
RAS240CNCCLI
RAS240CNCCLI
RAS240CNCCLI
RAS220CNCCLI

RAS960CNCCLI
RAS240CNCCLI
RAS240CNCCLI
RAS240CNCCLI
RAS240CNCCLI

RAS-

980CNCCLI H00CNCCLI H02CNCCLI H04CNCCLI

RAS-

260CNCCLI 260CNCCLI 260CNCCLI 260CNCCLI

RAS-

240CNCCLI 260CNCCLI 260CNCCLI 260CNCCLI

RAS-

240CNCCLI 240CNCCLI 260CNCCLI 260CNCCLI

RAS-

240CNCCLI 240CNCCLI 240CNCCLI 260CNCCLI

Piping Connection Kit

MC-NP40TA

Gas a
Liquid Gas
b Liquid Gas
c Liquid

50.8*3 25.4*4 38.1*1 19.05 38.1*1 19.05

54.0 25.4*4 38.1*1 19.05 38.1*1 19.05

Piping Size

Gas d Liquid

Gas e
Liquid Gas
f Liquid

Refer to item 5.5.1 for the piping size for the base units to be combined.

Gas Liquid

(mm)

Model

RAS-

H06CNCCLI H08CNCCLI H10CNCCLI H12CNCCLI H14CNCCLI H16CNCCLI H18CNCCLI H20CNCCLI

Outdoor Unit A

RAS280CNCCLI

RAS300CNCCLI

Combination

Outdoor Unit B

RAS-

260CNCCLI 280CNCCLI 280CNCCLI 280CNCCLI 280CNCCLI 300CNCCLI 300CNCCLI 300CNCCLI

Unit

Outdoor Unit C

RAS260CNCCLI

RAS280CNCCLI

RAS300CNCCLI

Outdoor Unit D

RAS260CNCCLI

RAS280CNCCLI

RAS300CNCCLI

Piping Connection Kit

MC-NP40TA

Gas 54.0 a Liquid 25.4*4

54.0 25.4*4

54.0 28.58

Gas 38.1*1 b
Liquid 19.05

44.45*2 19.05

Gas 38.1*1 c
Liquid 19.05

38.1*1 19.05

44.45*2 19.05

Piping Size

Gas

Liquid

Gas e
Liquid

Gas Liquid

Refer to item 5.5.1 for the piping size for the base units to be combined.

Gas Liquid

*1. If 38.1 piping is not available, use 41.28 piping and a reducer (field-supplied). *2. If 44.45 piping is not available, use 41.28 piping and a reducer (field-supplied). *3. If 50.8 piping is not available, use 54.0 piping and a reducer (field-supplied). *4. If 25.4 piping is not available, use 28.58 piping and a reducer (field-supplied). NOTE:
· Perform the installation of the outdoor unit and piping connection according to the figure.
Refer to the table for the outdoor unit model, the piping connection kit model and the piping diameter. 41

5. Refrigerant Piping Work
5.6 Piping Size, Piping Connection and Multi-Kit Selection
For selecting the pipe sizes between the outdoor unit and the piping connection kit 1 , between the piping connection kits 2 and for piping connection kit A , refer to items from 5.5.1 to 5.5.4 "Piping Size between Outdoor Units".

< For 2 and 3 Units Combination >

Upstream Side

2 Piping Connection Kit 1 A

Outdoor Unit A
1 La

Outdoor Unit B
1 Lb

Piping Connection Kit 2 A

Outdoor Unit C
1 Lc

< For 4 Units Combination >

Piping

Connection

3 Kit 1

B First Branch

Outdoor Unit A

Outdoor Unit B

Outdoor Unit C

1 2
2

1 La
Piping A Connection Kit 2

Piping A Connection Kit 3

Upstream Side

Outdoor

Unit

Indoor

Unit

C L3

5
Indoor Unit

L3
5 Indoor
Unit

H2 L1 L2

Keep the straight line distance of 500mm or more a er the piping connection kit.

Term

Symbol

Description

Total Piping Length

Example 1 Example 2

a+b+c Total length of all liquid pipes (sum)
d+e+f+g+h

Maximum Piping Length Example 1 Example 2

a+c

Actual length of the liquid pipe from outdoor unit stop

f+h

valve or piping connecting kit to the terminal unit.

Piping Length

Actual length of liquid pipe out of consideration of local resistance, such as bent or elbow.

Equivalent Length
42

This length is obtained by converting local resistance, such as bent or elbow, to straight pipe length.

5. Refrigerant Piping Work

< Example 1 > Line Branch (Including Main Pipe Branch)

Outdoor Unit A
a
First Branch Multi-Kit

b
Indoor Unit
A

c
Terminal Indoor Unit
B

< Example 2 > Using Piping Connection Kit

Outdoor Outdoor

Unit B

Unit A

Piping Connection Kit
First Branch Multi-Kit

g
Indoor Unit

Terminal Indoor Unit

NOTE: The main pipe branch is the piping branch method where Multi-Kits are connected to the pipes both a er the first branch.

Main Pipe Branch

Indoor Unit

5.6.1 Connection between Outdoor Units and Connection Kit

Multi-Kit (Optional Parts)

< Line Branch > (Standard Type)

B First Branch

C Multi-Kit after First Branch

Outdoor Unit HP

Model

Total Indoor Unit HP

Model

8, 10 MW-NP282A3

<12 MW-NP282A3

12 - 16 MW-NP452A3 12 - 17.99 MW-NP452A3

18 - 24 MW-NP692A3 18 - 25.99 MW-NP692A3

26 - 54 MW-NP902A3 26 - 55.99 MW-NP902A3

56 - 120 MW-NP2682A3

56 MW-NP2682A3

< D Header Branch >

Total Indoor Unit No. of Header Branches
HP

Max. 8

Max. 10

Model
MH-NP224A MH-NP288A

Piping Size (mm)

3 Main Pipe Diameter (Base Unit or Piping Connection Kit 1 to First Branch) [Multi-Kit of First Branch]
< 2 Pipes System >

(Standard Type)

(mm)

Outdoor Unit HP 8

Gas Pipe 19.05

Liquid Pipe 9.52

22.2

9.52

12, 14

25.4*1

12.7

28.58

12.7

18 - 24 26 - 34 36 - 54 56 - 66 68 - 72 74 - 88 90 - 96 98 - 120

28.58 31.75*2 38.1*3 44.5*4 44.5*4 50.8*5 50.8*5
54.0

15.88 19.05 19.05 19.05 22.2 22.2 25.4*1 25.4*1

4 [Pipe Diameter after First Branch]

(Standard Type)

Total Indoor Unit HP

Diameter (mm)

Gas Pipe

Liquid Pipe

< 6

15.88

9.52

6 - 8.99

19.05

9.52

9 - 11.99

22.2

9.52

12 - 15.99

25.4*1

12.7

16 - 17.99

28.58

12.7

18 - 25.99 26 - 35.99

28.58 31.75*2

15.88 19.05

5. Refrigerant Piping Work

36 - 55.99 56 - 67.99 68 - 73.99 74 - 89.99 90 - 97.99
98

38.1*3 44.45*4 44.45*4 50.8*5 50.8*5
54.0

19.05 19.05 22.2 22.2 25.4*1 25.4*1

*1. If 25.4 piping is not available, use 28.58 piping and a reducer (field-supplied).
*2. If 31.75 piping is not available, use 34.93 piping and a reducer (field-supplied).
*3. If 38.1 piping is not available, use 41.28 piping and a reducer (field-supplied).
*4. If 44.45 piping is not available, use 41.28 piping and a reducer (field-supplied).
*5. If 50.8 piping is not available, use 54.0 piping and a reducer (field-supplied).
NOTES:
· In the case that the piping length from the
Multi-Kit at the first branch to the terminal indoor unit is over 40m, the size of the piping between Multi-Kits should be increased by one size with reducers (field-supplied). Refer to item 5.7 Piping Branch Restrictions for details.
· Even if the equivalent refrigerant piping length
is more than 100m, there is no need to increase the pipe size after first branch. If the multi-kit size is larger than the first branch, adjust the multi-kit size to the first branch. In case that the selected pipe size after the first branch is larger than the pipe size before the first branch, use the same pipe size as before the branch.

5 [Pipe Diameter between Multi-Kit and Indoor Unit]

Indoor Unit HP
1.5 or less 2.0, 2.3 2.5 to 6.0 8.0 10.0 16.0 20.0

Diameter (mm)

Gas Pipe 12.7 12.7 *2

Liquid Pipe 6.35 *1 6.35 *1

15.88

9.52

19.05

9.52

22.2

9.52

28.58

12.7

28.58

15.88

5.6.2 Connection between Outdoor Units, Multi-Kits and Indoor Units

Piping Work Conditions

Item

Total Piping Length

Maximum Piping Length

Actual Length
Equiv. Length

Mark

Allowable Piping
Length (m)

Total Liquid Piping
Actual Length

1000

200 L1
225

Maximum Piping Length

between Multi-kit of 1st

Branch and Each Indoor Unit

100

Maximum Piping Length

between Each Multi-kit and

Each Indoor Unit

Piping Length between Piping Connection Kit 1 and Each Outdoor Unit

La, Lb, Lc, Ld

25 *6

Height Difference O.U. is

between

Higher

Outdoor Units O.U. is

and Indoor Units Lower

H1 *4

50 *1 40 *2

Height Difference between

Indoor Units

H2 *3, *5

Height Difference between Outdoor Units

2.0

*1. The maximum piping length of 110m is available on request. The following restrictions apply when the height difference between the outdoor units and the indoor units (the outdoor unit is higher) are 50m or more.

· The maximum outdoor temperature during
cooling operation is 43°C.
· The connectable indoor unit capacity ratio
is 100%.
· To protect the system, the thermo OFF may
be activated to turn the system off when the
outside temperature is 38°C or more.
· Performance priority mode is disabled.

*2. The maximum piping length of 110m is available on request. The following restrictions apply when the height difference between the outdoor units and the indoor units (the outdoor unit is lower) are 40m or more.

· The maximum outdoor temperature during
cooling operation is 43°C.

· The minimum outdoor temperature during
cooling operation is 10°C.
· The connectable indoor unit capacity ratio
is 130%.
*3. The piping length must be 15m or less when even one dedicated outside air system (DOAS) is connected to the system.
*4. When there are height differences between outdoor units, use the outdoor unit that has the largest height difference from the indoor unit as the height reference.
*5. When H2 is 30m or more, the connectable indoor unit capacity ratio is 100%.
*6. The piping length between outdoor units should be La Lb Lc Ld 25m. Lb - La 10m, Lc - La 10m, Ld - La 10m. (If the piping length is incorrect, it may cause failure of outdoor unit due to flowing back of the refrigerant.)
NOTES:
· For 2, 3 and 4 outdoor unit combination, the
outdoor unit "A" should be connected to the piping connection kit 1. (Refer to items 5.6.1 and 5.6.2 for the outdoor unit models.) For the details of piping connection, refer to the Installation Manual for Piping Connection Kit.
· Keep the straight line distance of 500mm or
more after the piping connection kit.
· Allowable total piping length may become
shorter than 1000m due to the limitation of maximum additional refrigerant amount as following table.
(Standard Type)

8, 10 12, 14 16 - 20 22 - 24 26 - 30 32 - 66

Max.

Additional Refrigerant

28.0

36.0

40.0

46.0

56.0

63.0

Charge (kg)

HP 68 - 88 90 - 120

Max.

Additional Refrigerant

73.0

93.0

Charge (kg)

· If the piping length (L3) between each multi-kit
and indoor unit is considerably longer than that of other indoor units, refrigerant may not flow well and also performance may be deteriorated compared to other models. (Recommended Piping Length: within 15m)

5. Refrigerant Piping Work
· The piping connection kit is counted from the
indoor unit side (as Piping Connection Kit 1).
· Check the gas pipe and liquid pipe are
equivalent in terms of the piping length and piping system.
· Use a multi-kit (system components) for the
branch pipe of indoor unit.
· Install the indoor unit and multi-kit according
to each Installation and Maintenance Manual.
· When connecting units in the field, use bent
pipes or (horizontal) elbow pipes to absorb the expansion and contraction of pipes caused by pipe temperature change.
5.7 Piping Branch Restrictions
The number of the main piping branches is not limited under the following restrictions. In the case that the piping length L2 from the Multi-Kit at the first branch to the farthest indoor unit is over 40m.
(Example 1): Installation with Main Piping Branch (T) Piping length from the Multi-Kit at the first branch to the terminal indoor unit is within 40~100m.
1. In the case that the piping length L2 is over 40m, the size of gas and liquid lines "b and c" or "g and h" should be increased by one size with reducers (field-supplied). If (a) is smaller than (b, g) after increasing the size, increase the size of (a) to the same size as (b, g).
2. The difference between the piping length from the first branch to the farthest indoor unit and the piping length from the first branch to the closest indoor unit must be within 60m. (g+h+j) - (b+d) 60m

a
First Branch Multi-Kit

The Closest Indoor Unit from the First Branch

Terminal Indoor Unit
Terminal Indoor Unit

The Farthest Indoor Unit from the First Branch
(Example 2): Installation without Main Piping Branch (T) Piping length from the Multi-Kit at the first branch to the terminal indoor unit is within 40~100m.
1. In the case that L2 is over 40m, the size of gas and liquid lines "b, d and f" should be increased
45

5. Refrigerant Piping Work
by one size with reducers (field-supplied). If (a) is smaller than (b) after increasing the size, increase the size of (a) to the same size as (b). 2. The difference between the piping length from the first branch to the farthest indoor unit and the piping length from the first branch to the closest indoor unit must be within 60m. (b+d+f+h) - (c) 60m

a
First Branch Multi-Kit

The Closest Indoor Unit from the First Branch

Terminal

Indoor Unit

The Farthest Indoor Unit from the First Branch

Main Piping Branch: Both of the pipes branched from a Multi-Kit are connected to the next Multi-Kits.
Header branch can be used with line branch. Header branch can also be used after the second branch. Do not connect a line branch to a header branch.
CORRECT

5.8 Restrictions on Height Difference between Indoor Units
If all of the following conditions apply, increase the size of liquid lines (b to k) after the first branch by one size.
· H2 is over 30m. · Neither the size of the liquid line nor that of
the gas line need to be increased by one size according to 5.7 Piping Branch Restrictions.
· The liquid pipe diameter is a > b · g.
Multi-Kit

First Branch Multi-Kit

Multi-Kit

Line Branch Header Branch
CORRECT

Indoor Unit Line Branch

Header Branch

Line Branch

INCORRECT

Header Branch Header Branch
46

6. Electrical Wiring
WARNING
· Turn OFF the main power switch of the
indoor unit and the outdoor unit and wait for more than 3 minutes before electrical wiring work or a periodic check is performed.
· Check to ensure that the indoor fan and
the outdoor fan have stopped before electrical wiring work or a periodic check is performed.
· Protect the wires, electrical parts, etc. from
rats or other small animals. If not, rats may gnaw at unprotected parts, which may lead to a fire.
· Avoid the wirings from touching the
refrigerant pipes, plate edges and electrical parts inside the unit. If not, the wires will be damaged and at the worst, a fire will occur.
· Use a medium sensing speed type ELB (Earth
Leakage Breaker, activation speed of 0.1 sec. or less). If not, it will cause an electric shock or a fire.
· Fix the cables securely. External forces on
the terminals could lead to a fire.
· Tighten screws according to the following
torque.
M4: 1.0 to 1.3 N·m M5: 2.1 to 2.4 N·m M6: 4.0 to 5.0 N·m M8: 9.0 to 11.0 N·m M10: 18.0 to 23.0 N·m
· The electrical wiring work must be
performed by authorized installers in order to prevent an electric shock or a fire.
· Perform the electrical work according to the
regulation of each region and Installation and Maintenance Manual, and the dedicated electrical circuit must be used. If the electrical wiring work is performed incorrectly or there is a capacity shortage of the power circuit, it will cause an electric shock or a fire.
· Use the specified cables for wiring between
the outdoor unit and indoor units. Selecting incorrect cables will cause an electric shock or a fire.
· Tightly secure the wirings to the terminal
block according to the specified torque. If tightening the terminals is not completed, heat generation, an electric shock or a fire

6. Electrical Wiring
will occur at the terminal connections.
· Tightly clamp the wires with a cord clamp
after the wiring to the terminal block has been completed. In addition, run securely the wires through the wiring hole. If not, the wires will be pinched and it may cause a fire.
· Turn OFF the power source when handling
the service connector. Otherwise, it may cause an electric shock.
6.1 General Check
1. Make sure that the field-selected electrical components (main power switches, circuit breakers, wires, conduit connectors and wire terminals) have been properly selected according to the electrical data indicated in Table 6.1. Make sure that the components comply with National Electrical Code (NEC).
a. Supply electrical power to each outdoor unit. ELB, fuse and main switch should be installed for each outdoor unit. If not, it will cause a fire or an electrical shock.
b. The power sources for the indoor unit and outdoor unit should be supplied respectively. Connect the power supply wiring to each indoor unit group connected to the same outdoor unit. (Max. capacity of one indoor unit group is 15A.) ELB, fuse and main switch should be installed for each indoor unit group. Refer to Installation and Maintenance Manual attached to the indoor unit.
2. Check to ensure that the power supply voltage is within ±10% of the rated voltage. If the power supply voltage is too low, the system cannot start due to the voltage drop.
3. Check the size of the electrical wires. 4. The packaged air conditioner may not operate
normally in the following cases.
a. In case that the power source for the packaged air conditioner is supplied from the same power transformer as the device with high electricity consumption *1
In case that the power supply wiring for the device *1 and for the packaged air conditioner are located close to each other. *1. Lift, container crane, rectifier for electric railway, inverter power device, arc furnace, electric furnace, large-sized induction motor and large-sized switch. In the cases mentioned above, induction surge of the power supply wiring for the packaged air conditioner could occur 47

6. Electrical Wiring

due to a rapid change in electricity consumption of the device and activation of switch. Therefore, check the field regulations and standards before performing electrical work in order to protect the power supply wiring for the packaged air conditioner.
5. Check to ensure that the earth wire of the outdoor unit, indoor unit are connected.
6. Special Attention UAE
UAE.S 5010-5:2019 stipulates to lower the set temperature of the air conditioner (thermostat 20°C set value evaluation) and must be complied with. "All appliances subject for certification (except chiller) shall comply with the thermostat temperature setting limit that limiting the lowest allowable cooling temperature setpoint to 20°C." For the wired controller used in UAE, use PC-ARFG1-U (602992344), which has a minimum cooling temperature setting of 20°C.

6.2 Electrical Wiring for Outdoor Unit
Connect the electrical wirings according to the figures on the right.

1. Connect the power supply wires to L1, L2, L3, and N (for 400V, 380-415V) for the three phase power source on the terminal block TB1 and earth wire to the terminal in the electrical box.
2. Connect the communication wires between the outdoor and indoor units to the TB2 terminals 1 and 2 on the PCB1. As for the communication wires between outdoor units in the same refrigerant cycle, connect them to the TB2 terminals 3 and 4 on the PCB1.
3. Tighten screws for the terminal block according to the following table.
< Required Tightening Torque >

Size M3.5 M4 M5 M6 M8 M10

Tightening Torque 0.7 to 1.1 N·m 1.0 to 1.3 N·m 2.1 to 2.4 N·m 4.0 to 5.0 N·m 9.0 to 11.0 N·m
18.0 to 23.0 N·m

4. Main Fuse Capacity (Standard Type)

8, 10 HP

12, 14 HP

16, 20 HP

22 HP

24 to 28 HP

30 HP

3N~, 380 - 415 V/50 Hz 3N~, 380V/60 Hz

20A

30A

40A

50A

60A

80A

(1) Detail of Electrical Box Terminal < 380-415V/50Hz, 380V/60Hz > Terminal Block for Power Source (TB1)

Screw (M8)
Attach insulation sleeve.
Rubber Bush

Earth Terminal (Connect securely cable.)
Earth Wire
Cable Clamp (Accessory)

Electrical Box
(1) Terminal Block for Power Source
(5) Power Source Wiring Outlet (Rubber Bush)
Fix the control wiring using a clamp.
Comm. Wiring Power Source Wiring Cord Clamp (Accessory) NOTE: Fix by accessory screw (for fixing comm. wiring).
Cord Clamp (for fixing power source wiring)

Printed Circuit Board (PCB1) (2) Terminal Block
for Control Circuit
(5) Comm. Wiring Outlet (Rubber Bush)

(2) Detail of Terminal Block for Control Circuit
Do not apply the main power source to TB2 and TB3.
TB3 (M4) TB2 (M3.5)

H-Link Terminals For communication between ODU and IDU or between ODUs of other refrigerant cycle system

ODU to ODU Terminals For communication between ODUs

(3) Details of Bottom Base Wiring Outlet

(Unit: mm)

For Power Source Wiring (65 Knockout Hole)

F(o5r 5CoKmnomck. oWuirtiHngole)1N.OItTnoEstStha:ell

accessory rubber wiring outlets.

bushes

For Comm. Wiring 2. (33 Knockout Hole)

Seal hermetically the end of conduit pipe by using putty, etc. (for water protection)

(4) Details of Piping Cover Wiring Outlet
For Power Source Wiring (f65 Knockout Hole)

(Unit: mm)

For Comm. Wiring (33 Knockout Hole) For Comm. Wiring (55 Knockout Hole)
NOTES: 1. Install accessory rubber bushes to the wiring outlets. 2. Seal hermetically the end of conduit pipe by using putty, etc.
(for water protection)

(5) Ring Core (White, Accessory)

Wind each wire 5 times around the Communication Wires

ring core as shown on the right.

and Earth Wire

Ring Core

(5) Details of Wiring Outlets inside the Electrical Box (Rubber Bush Section) Rubber Bush (Wiring Outlet)

Correct

Incorrect

6. Electrical Wiring
entering the conduit tube.
· Make a drain hole at the lowest part of the
conduit tube.

Electrical Box (Metal)

Rubber Bush
Make sure that the rubber bush is in place.

Using a cutter knife, cut an X in the rubber bush on site as shown below.

CAUTION
· Tightly secure the power source wiring
using a cord clamp inside the unit. NOTE:
· Fix the rubber bushes with adhesive when
conduit tubes to the outdoor unit are not used.

Correct

Make sure that the power source wiring passes through the center of the rubber bush.
Incorrect

Snow or water may enter.

Communication Wiring Power Source Wiring

Liquid Pipe Gas Pipe

Rubber Bush

Rubber Bush
If the power source wiring does not pass through properly, snow or water may enter in the unit.

Rubber Bush

CAUTION
· Be sure to note the following points to run
the cables under the unit using conduit tube. (The pipe cover needs to be removed before performing piping and wiring works.)
NOTES:
· Do not run the power supply wiring and
communication wiring through the same conduit tube. Moreover, keep at least 5cm between the power supply wiring and communication wiring.
· Pull out each wire from each corresponding
knockout hole. Cut an "X" in rubber bush (accessory) and securely attach it to the knockout hole for cable protection. Check that the rubber bush is surely attached.
· Attach the pipe cover to prevent rats or other
small animals from entering the unit.
· Prevent the wirings from touching or rubbing
against the refrigerant pipes, plate edges and electrical parts inside the unit.
· When the power source cable (cabtyre cable)
whose size exceeds 38mm2 is used, peel the sheath part of the cable, put into the unit and run it. At this time, do not damage the coated insulating part.
· Completely seal the end of conduit tube with
sealing materials to prevent the rain from

6.3 Electrical Wiring Connection
WARNING
· The ELB (earth leakage breaker), FUSE and
S (main switch) must be installed for each outdoor unit and also for each indoor unit group. If not, it may cause an electrical shock or fire.
· Perform the electrical work according
to the regulation of each region and the Installation and Maintenance Manual, and the dedicated electrical circuit must be used. If the electrical wiring work is performed incorrectly or there is a capacity shortage of the power circuit, it will damage electrical parts and cause an electric shock or a fire.
· Check that the ground wire is securely
connected. If the unit is not correctly grounded, it may lead to an electrical shock. Do not connect the ground wiring to a gas piping, water piping, lighting conductor or ground wiring for telephone.
· The power sources for the indoor unit
and outdoor unit should be supplied respectively.
· The power source for each indoor unit group
should be supplied respectively.
49

6. Electrical Wiring

1. Power Source Wiring Supply the power sources to each outdoor unit and indoor unit group respectively. Power source wiring is fundamentally according to this method.

1 ELB (Earth Leakage Breaker) 6 Comm. Wiring (O.U. ~ I.U.)

2 FUSE

7 Comm. Wiring (O.U. ~ O.U.)

3 S (Main Switch)

8 Comm. Wiring (I.U. ~ I.U.)

4 Power Source Wiring (O.U.) 9 Power Source Wiring (I.U.)

5 Earth Wiring (O.U.)

10 Earth Wiring (I.U.)

Outdoor Unit Power Source 3N~ 380 - 415V/50Hz 3N~ 380V/60Hz

1 ELB 2 FUSE 3S 4

Outdoor

Unit C

Outdoor

Unit B

Outdoor

Unit A

Indoor Unit Side

FUSE

Indoor

ELB

Unit 10

Indoor Unit

Power Source

1N~ 220-240V/50Hz

1N~ 220V/60Hz

2. The recommended wire size and main switch( 1 ~ 7 ) are shown in Table 6.1. Please refer to the indoor units installation manual for other cables ( 8 ~ 10 ).
· Select the capacity of power transformer according to the maximum running current. · When the power supply wiring is too long, select the minimum wiring size whose voltage drop is
within 2%.
· Power supply voltage should comply with the following requirements.
Supply Voltage: Rated Voltage within ±10% Starting Voltage: Rated Voltage within -15% Operating Voltage: Rated Voltage within ±10% Imbalance between Phases: within 3%
· Calculate short-circuit current from the power transformer and electrical wiring length and size, and
select the appropriate rated capacity for ELB (earth leakage breaker).
· Select ELB which can be used for the high harmonic wave.
WARNING
· Do not connect the earth wire to the gas pipe, water pipe or lightening conductor.
Gas Pipe: An explosion and ignition may occur when gas leaks. Water Pipe: Earth wire becomes ineffective when a hard vinyl pipe is used. Lightning Conductor: The earth electric potential abnormally increases when a lightening
conductor is used. 50

6. Electrical Wiring

3. The recommended wiring, ELB and breaker sizes are shown in Table 6.1.
· Standard Type

Table 6.1 Electrical Data and Recommended Wiring, Breaker Size/1 Outdoor Unit

Model

Power Supply

Maximum Running Current

Power Supply Line

1 ELB

3 Main Switch

Nominal Nominal Sensitive Nominal

Current

2 Fuse

(A)

(mm)

(A)

(mA)

(A)

RAS-080CNCCLI

16.1 MLFC2.0SQ 20

RAS-100CNCCLI

20.0 MLFC3.5SQ 20

RAS-120CNCCLI

23.3 MLFC3.5SQ 30

RAS-140CNCCLI

27.7 MLFC3.5SQ 30

RAS-160CNCCLI

32.7 MLFC5.5SQ 40

RAS-180CNCCLI 3N~ 380-415V/50Hz 39.7 MLFC8.0SQ

RAS-200CNCCLI 3N~ 380V/60Hz

40.0 MLFC8.0SQ 40

RAS-220CNCCLI

42.7 MLFC8.0SQ 50

RAS-240CNCCLI

53.0 MLFC14.0SQ 60

RAS-260CNCCLI

58.3 MLFC14.0SQ 60

RAS-280CNCCLI

59.4 MLFC14.0SQ 60

RAS-300CNCCLI

65.6 MLFC14.0SQ 80

ELB: Earth Leakage Breaker, MLFC: Flame Retardant Polyflex Wire Install main switch and ELB for each system separately. Select the high response type of ELB that acts within 0.1 second.

Field Minimum Wire Sizes for Power Source and Communication

Model

Power Supply

Maximum Running Current
(A)

4 Power Source Cable Size

EN60 335-1 *1

MLFC *2

(mm2)

6 7 8

Communication Wire Size

Earth Wire

EN60 335-1 MLFC

Size

(mm2)

RAS-080CNCCLI

16.1

2.5

0.75

2.5

RAS-100CNCCLI

20.0

2.5

3.5

0.75

2.5

RAS-120CNCCLI

23.3

2.5

3.5

0.75

2.5

RAS-140CNCCLI

27.7

3.5

0.75

RAS-160CNCCLI

32.7

5.5

0.75

RAS-180CNCCLI 3N~ 380-415V/50Hz 39.7

RAS-200CNCCLI 3N~ 380V/60Hz

40.0

0.75

RAS-220CNCCLI

42.7

0.75

RAS-240CNCCLI

53.0

0.75

RAS-260CNCCLI

58.3

0.75

RAS-280CNCCLI

59.4

0.75

RAS-300CNCCLI

65.6

0.75

NOTE:
· Refer to the NOTES on page page 52 for selection of the power source cable size.
51

6. Electrical Wiring
NOTES:
· Follow the local codes and regulations when selecting field wires. · The wire sizes marked with *1 in the table of the previous page are selected at the maximum current of
the unit according to the European Standard, EN60 335-1. Use the wires which are not lighter than the ordinary tough rubber sheathed flexible cord (code designation H05RN-F) or ordinary polychloroprene sheathed flexible cord (code designation H05RN-F).
· The wire sizes marked with *2 in the table of the previous page are selected at the maximum current of
the unit according to the wire, MLFC (Flame Retardant Polyflex Wire) manufactured by Hitachi Cable Ltd., Japan.
· Use a shielded cable for the transmitting circuit and connect it to the ground. · In the case that power cables are connected in series, add apply maximum current to each unit and
select appropriate wires in the table below.

Selection According to EN60 335-1

Current i (A) i 6
6 < i 10 10 < i 16 16 < i 25 25 < i 32 32 < i 40 40 < i 63 63 < i

Wire Size (mm2) 0.75 1 1.5 2.5 4 6 10 3 *3

*3. In the case that the current exceeds 63 A, use MLFC cables. When the field ambient is around 30 °C.

Selection According to MLFC (at Cable Temperature of 90 °C, Field Ambient Temperature 52°C and Cables are Tied Together)

Current i (A)

Wire Size (mm2)

i 12

0.75

12 < i 15

1.25

15 < i 22

22 < i 30

3.5

30 < i 40

5.5

40 < i 50

50 < i 72

72 < i 95

95 < i 115

115 < i 133

NOTE: When the field ambient is high, for example 48 °C.

NOTE:
· Use 2-core cable (equivalent to following cables: VCTF, VCT, CVV, MVVS, VVR or VVF, size: 0.75 mm2 to
1.25 mm2 (manufactured by Hitachi Cable Co. Ltd.)) or 2-core twist pair cable (equivalent to following cables: KPEV or KPEV-S (manufactured by Hitachi Cable Co. Ltd.)) for the control cable between the outdoor unit and the indoor unit. The total communication wiring length between the indoor unit and the outdoor unit should be less than 1000 m and the total communication wiring length between outdoor units should be less than 30m.

CAUTION
· Install a multi-pole main switch with a space of 3.5 mm or more between each phase.
6.4 Electrical Wiring Connection of Indoor Unit and Outdoor Unit
1. Connect a power supply wiring to each outdoor unit. Connect an ELB, fuse and main switch (S) to each outdoor unit.
2. Connect a power supply wiring to each indoor unit group connected to the same outdoor unit. (Max. capacity of one indoor unit group is 15A.) Connect an ELB, fuse and main switch (S) to each indoor unit group.
3. Connect the communication wiring between indoor units and outdoor units, as shown in Fig. 6.1. 4. Connect the communication wiring in the same refrigerant cycle unit. (In the case that the refrigerant
piping of indoor unit is connected to the outdoor unit, also connect the communication wiring to the same indoor unit.) Connecting the refrigerant piping and communication wiring to the different refrigerant cycle systems may lead to malfunction. 5. Use 2-Core lead wires such as shielded twist pair cable for the communication wiring. (Do not use 3-Core or over.) 52

6. Electrical Wiring

6. Use the same kind of cables in the same H-LINK system. 7. The communication wiring is required to be separated from the power supply wiring when installed
parallel to the power supply wiring. Keep at least 5cm between the communication wiring and the power supply wiring, and also min. 1.5m between the communication wiring and power supply wiring for other electrical device. If the above is not secured, put the power supply wiring into the metal conduit tube to separate it from other wirings. Make sure to ground the end of the power supply wiring. 8. Connect the following communication wiring to the terminals 1 and 2 of TB2 in the outdoor unit A (main unit).
a. between outdoor unit and indoor unit
b. between outdoor unit and outdoor unit in other refrigerant cycles
9. Do not connect the power supply wiring to the terminal block for communication wiring (TB2). All the printed circuit boards in the same refrigerant cycle will be damaged.
10. Connect the earth wire to the outdoor/indoor units. The earth wiring work under the condition of 100W (max.) ground resistance must be performed by a qualified person.
11. Connect the communication wiring between outdoor units in the same refrigerant cycle to the terminals 3 and 4 on the terminal block (TB2).

· Communication Wiring

Refrigerant Group 1 (Cooling Only System)

Refrigerant Group 2 (Cooling Only System)

Outdoor Unit (Main)

TB1

TB3 TB2

L1 L2 L3 N 1 2 1 2 3 4

Outdoor Unit (Sub)

TB1

TB3 TB2

L1 L2 L3 N 1 2 1 2 3 4

Outdoor Unit (Main)

TB1

TB3 TB2

L1 L2 L3 N 1 2 1 2 3 4

Outdoor Unit (Sub)

TB1

TB3 TB2

L1 L2 L3 N 1 2 1 2 3 4

Communication Wire for H-LINK System

Communication Wire for Main-Sub

L1 L2 N 1 2 A B

TB1

TB2

Unit No. 0

Indoor Unit

L1 L2 N 1 2 A B

TB1

TB2

Unit No. 1

Indoor Unit

L1 L2 N 1 2 A B

TB1

TB2

Unit No. 2

Indoor Unit

L1 L2 N 1 2 A B

TB1

TB2

Unit No. 0

Indoor Unit

L1 L2 N 1 2 A B

TB1

TB2

Unit No. 1

Indoor Unit

L1 L2 N 1 2 A B

TB1

TB2

Unit No. 2

Indoor Unit

NOTES:
· For the combination units, DSW settings of Main and Sub are required. · Alarm occurs if the communication wires between main outdoor unit and sub outdoor units are
connected to the terminals 1 and 2 for H-LINK system.
· In case that alarm is indicated on the LCD of Main outdoor unit, follow the "7-segment" indication of
the Main outdoor unit for checking.
· Perform function setting at Main outdoor unit. · Maximum number of refrigerant groups with one central controller is 64 (for H-LINK II).
Maximum number of indoor units to be connected is 160 (for H-LINK II).

6. Electrical Wiring

< 380-415V/50Hz, 380V/60Hz >

Outdoor Unit A (Main)

TB1

RST (L1) (L2) (L3)

TB2
12 34

TB3
12

Outdoor Unit B (Sub)

TB1

RST (L1) (L2) (L3)

TB2

TB3

1234 12

Main Switch
FUSE
ELB ELB
3N 380-415 V/50 Hz 380 V/60 Hz

Main Switch FUSE

Earth

Earth
TB PCB

: Terminal Block : Printed Circuit Board : Field Wiring : Communication Wire (Shielded Twist Pair Cable) DC5V (Non-Pole Communication
H-LINK System) : Field Supplied : Optional Accessory

ELB ELB

3N 380-415 V/50 Hz 380 V/60 Hz
1N 220-240 V/50 Hz 220 V/60 Hz

Main Switch

Distribution Box or Pull Box

FUSE ELB ELB

L1 L2 N
TB1 No. 0 Indoor Unit
TB2
AB12

Controller Cable (Shielded Twist Pair Cable)

Wired Controller

Earth
Controller Cable (Shielded Twist Pair Cable)

L1 L2 N
TB1 No. 1 Indoor Unit
TB2
AB12

Wired Controller

Earth

No. 0 System Indoor Units

No.1 System Indoor Units

Fig. 6.1 Instruction for Electrical Wiring Connection

6.5 PSW and DIP Switch Setting for Outdoor Unit

NOTE:
· airCloud Tap application can be used to make installation settings except end terminal resistance.
For details, refer to "Outdoor Unit Installation Setting" in the airCloud Tap application manual.
1. H-LINK Connection Setting
When connecting H-LINK or H-LINK II, set the outdoor unit number, the refrigerant cycle number, and the end terminal resistance.
2. With the power ON, set pin no. 4 of the DIP switch (DSW4) to the ON position, and press push switches (PSW) 2, 3, and 5 at the same time for 3 seconds. The 7-segment LED will display the following and the system will enter the installation setting mode.

SEG2

SEG1

PSW2 PSW5 PSW1 PSW3
PSW4

DSW4 ON
123456

Set pin no. 4 to the ON position. (After completing setting, set it to the OFF position.)

Press them at the same time for 3 sec. or longer.

3. Refrigerant Cycle Number and Indoor Unit Number Setting
Step1. Set the same refrigerant cycle number for the outdoor and indoor units of the same refrigerant system.
Step2. Set the outdoor unit number of the system combination. 54

6. Electrical Wiring
Step3. Press the push switch (PSW1) while in installation setting mode. Step3-1 The 7-segment LED will display the following and the number will change by pressing PSW3 or PSW5. Step3-2 The change between refrigerant cycle number and outdoor unit number can be made by pressing PSW2 and PSW4.
Step4. After completing setting, press push switch (PSW1) and set dipswitch (DSW4) pin to the OFF position.

Press PSW1. Ref. Cycle No.

PSW3 ()

Press PSW1.
PSW2
PSW5 PSW1 PSW3
PSW4
Base Unit (Before shipment)
(No. 0) od 0

PSW2 O.U. No.

PSW4

PSW5 () PSW3 ()

Outdoor Unit A (No. 0)
od 1

PSW5 ()

Combination of Base Units Outdoor Unit B (No. 1) od 2

Outdoor Unit C (No. 2)
od 3

NOTE:
· Refer to the Installation and Maintenance Manual attached to the indoor unit for the indoor unit
refrigerant cycle number setting.

Make sure the refrigerant cycle No. set is not the same No. as other outdoor units.

Refrigerant Cycle for This Outdoor Unit

Outdoor Unit

UTOPIA Series Outdoor Unit

Set to the same refrigerant cycle No.

Communication Line (No Polarity)
H-LINK or H-LINK II

Indoor Unit

Wired Controller

Centralized Controller

Maximum Number of Connectable Outdoor Units and Indoor Units (for H-LINK II)

Outdoor Unit

Indoor Unit

160

NOTE:
· For installing the outdoor unit and the
indoor unit on the same communication wire, which cannot be used for H-LINK II, maximum number of connectable indoor units is 128.

· Setting of End Terminal Resistance
Before shipment, No. 1 pin of DSW10 (for the setting of end terminal resistance) is in the "ON" position.

Setting of End Terminal Resistance

DSW10

Before Shipment Cancellation

1 2 OFF 1 2 OFF

6. Electrical Wiring
In the case of one refrigerant cycle in the same H-LINK or H-LINK II, set all No. 1 pins of DSW10 in the "OFF" position except the main outdoor unit A.

Outdoor Unit (Unit Combination)

Set the end terminal.

DSW10
12
Unit A (Main)

DSW10
12
Unit B (Sub)

DSW10
12
Unit C (Sub)

Communication Wire (No Polarity) H-LINK or H-LINK II

Cancel the end terminal setting.

Indoor Unit

In the case of more than one refrigerant cycles in the same H-LINK or H-LINK II, set all No. 1 pins of DSW10 in the "OFF" position except the main outdoor unit A.

Cancel the end terminal.
Outdoor Unit (Base Unit)

Outdoor unit being set end terminal

Outdoor Unit (Unit Combination)

Set the end terminal.

Cancel the end terminal.
Outdoor Unit (Unit Combination)

Cancel the end terminal.
Outdoor Unit (Base Unit)

DSW10 12
Communication Wire (No Polarity) H-LINK or H-LINK II
Indoor Unit

DSW10
12
Unit A (Main)

DSW10
12
Unit B (Sub)

DSW10
12
Unit C (Sub)

Cancel the end terminal setting.

DSW10

12
Unit A (Main)

12
Unit B (Sub)

Indoor Unit

DSW10 12
Indoor Unit

Wired Controller

· Function Setting

6. Electrical Wiring

External Input/Output and Function Setting

Make sure to perform external input/output and function setting while the outdoor unit is stopped. It cannot be set while the outdoor unit is operating or check mode.

[ External Input/Output Setting ]
Start of Setting Turn ON DSW4-No.4. Turn ON DSW4-No.6.

[ Function Setting ]
Start of Setting Turn ON DSW4-No.4. Turn ON DSW4-No.5.

For the setting mode, refer to 1 below. For the setting mode, refer to 2 below.

Exit Setting Mode

NOTE: Release "Menu Mode" a er

Turn OFF DSW4-No.6 during indicated

Turn OFF DSW4-No.5 during indicated the setting is completed.

External Input/Output Setting Mode.

Function Setting Mode.

Otherwise, the air conditioner

Turn OFF DSW4-No.4.

may not operate appropriately.

A er setting, confirm DSW4 setting is same as setting before shipment.

2 [ Function Setting ]
By pressing the push-switches PSW3 ( ) and PSW5 ( ), the setting can be changed. PSW4 ( ): forward, PSW2 ( ): backward Refer to the Service Manual for more details.
< Example > Fill out the selected function setting No. in the space of the table as shown.

1 [ External Input/Output Setting ]
By pressing the push-switches PSW3 ( ) and PSW5 ( ), the function No. can be selected. PSW4 ( ): forward, PSW2 ( ): backward

Item 1 Not Prepared

Night-Shi (Low Noise)

SEG2 SEG1 SET

Fill out the selected function setting No. in the space of the table as shown.

Item

Input Setting 1 CN17 [1-2 pin]

Input Setting 2 CN17 [2-3 pin]

SEG2

SEG1

< Example > SET

Cancellation of Outdoor Ambient Temperature Limit

4 Not Prepared

5 Not Prepared

Cancellation of Outdoor Unit Hot Start

Input Setting 3 CN18 [1-2 pin]

Output Setting 1 CN16 [1-2 pin]

Output Setting 2 CN16 [1-3 pin]

(Setting Before Shipment)

7 Priority Capacity Mode Minimum Evaporating
8 Temperature Setting for Cooling
9 Not Prepared Indoor Expansion Valve
10 Control Target Value for Cooling

Before shipping, the input/output function settings are specified to each input/output terminal according to above table. The details of function No. and external input/output settings are as shown below.

11 Not Prepared 12 Not Prepared

Setting of External Input and Output Function

Function No.

Input

Output

1 Fixing Heating Operation Mode * Operation Signal

2 Fixing Cooling Operation Mode Alarm Signal

3 Demand Stoppage

Compressor ON Signal

4 Outdoor Fan Motor Start/Stop Defrost Signal *

5 Forced Stoppage

6 Demand Current Control 40%

7 Demand Current Control 60%

8 Demand Current Control 70%

9 Demand Current Control 80%

10 Demand Current Control 100%

11 Low Noise Setting 1

12 Low Noise Setting 2

13 Low Noise Setting 3

External Abnormality Detection Setting

0 No Setting

No Setting

*1. Please do not set for Cooling Only. The same input/output function setting cannot be set to different input/output terminals. If set, a setting of larger function number becomes invalid. Example: When setting of input 1 and input 2 are same,
input 2 will be invalid.

Function No.14 is valid only when applied to Input Setting 3.

13 Not Prepared

14 Not Prepared

Indoor Expansion Valve Initial Opening for Cooling

16 Not Prepared

17 Low Noise Setting

18 Demand Function Setting

19 Wave Function Setting

Protection of Decrease 20 in Outlet Temperature
for Cooling

Outlet Temperature Control (DOAS)

Adjustment of Fan Rotation (for multiple installation)

23 Not Prepared

24 Not Prepared

Item 25 Not Prepared

SEG2 SEG1 SET

Crankcase Heater Control during Stoppage

27 Not Prepared

Intermittent Operation of Outdoor Fan Motor

Indoor Expansion Value Control Target Value 29 for Cooling (Only for 4-way Cassette Type)

30 Not Prepared

31 Not Prepared

32 Not Prepared

33 Not Prepared

34 Not Prepared

35 Not Prepared

Permit Indoor Fan Operation during Forced Stoppage

37 Not Prepared

38 Not Prepared

39 Not Prepared

40 Not Prepared

41 Not Prepared

42 Not Prepared

43 Not Prepared

44 Not Prepared

45 Not Prepared

46 Not Prepared

47 Not Prepared

7. Air-Tight Test and Additional Refrigerant Charge

7.1 Air-Tight Test

1. Check to ensure that spindles of the stop valves for gas and liquid pipes are closed completely before air-tight test. Check the cap shape and tighten according to the torque specification as shown in the table below.
2. The refrigerant used for this outdoor unit is R410A. Use the manifold gauge and the charging hose for exclusive use of R410A.

< Tightening Check of Stop Valves >
After connecting the pipe, remove the caps of stop valves for gas and liquid. Tighten the open-close spindle in the closing direction according to the following tightening torque.
· Caution for Operation of Stop Valves
1. Remove the stop valve caps before performing the air-tight test after connecting the refrigerant piping. Tighten the spindle (valve) in clockwise direction according to the following tightening torque.
2. Perform the work after warming the spindle part with a dryer etc. when controlling the stop valve in a cold area. (O-ring of the spindle part will harden at the low temperature and the refrigerant leakage may occur.)
3. Do not apply excessive force after fully opening the spindle. (Tightening Torque: < 5.0N-m) (The back seat is not provided.)
4. When each valve is opened, remove tags "Close" (Accessories) and attach tags "Open" instead.

Do NOT put two wrenches here. Stop Valve for Liquid Pipe
Position both wrenches here.
Flare Nut

Stop Valve for Gas
Cap

Hexagonal Wrench

(To open or close the stop valve)

O-ring

Cap

(Rubber)

Access Port (Only the charging hose for R410A can be connected.)
Refrigerant Pressure Stop Valve Counterclockwise...Open Clockwise...............Close Closed before Shipment

< CNCCLI >

Outdoor Unit (Base Unit)
8 - 14HP 16 - 20HP 22 - 30HP

Spindle (Valve)

Gas Valve

Liquid Valve

7.0 - 9.0 22.0 - 28.0
9.0 - 11.0

Tightening Torque (N·m)

Flare Nut

Cap

Check Joint

Hexagonal Wrench Size (mm)

Liquid

Gas Valve

Liquid Valve

Gas Valve

Liquid Gas Liquid Valve Valve Valve

33.0 - 42.0

50.0 - 62.0 42.0 - 48.0

9.0 - 14.0 14.0 - 18.0 10

68.0 - 84.0

50.0 - 62.0

< Air-Tight Test Method >
1. Connect the manifold gauge to the check joints of the liquid line and the gas line stop valves using charging hoses with a vacuum pump or a nitrogen cylinder. Perform the air-tight test. Do not open the stop valves. Apply nitrogen gas pressure of 4.15MPa for "air365 Max" series. For checking gas leakage, use the leak detector or forming agent. If there is any leakage, fix the leaking part.
2. For checking gas leakage, do not use a forming agent which generates ammonia. Additionally, do NOT use a household detergent as forming agent whose components are not clear. The recommended forming agent for checking gas leakage is shown in the table.

Procedure Completion of
Ref. Piping
58

Applying Nitrogen Gas

Check of Pressure Decrease

Repairing of Leakage Part

Pass

Recommended Forming Agent

Manufacturer

Guproflex

Yokogawa & CO., Ltd.

7. Air-Tight Test and Additional Refrigerant Charge

WARNING

· Be sure to use Nitrogen Gas for air-tight test.
If other gases such as oxygen gas, acetylene gas or fluorocarbon gas are accidentally used, it may cause an explosion or gas intoxication.
<Insulation Work>
1. Securely insulate gas piping side and liquid piping side individually. Make sure to insulate the union flare nut for the piping connection as well.
2. Mount the piping cover equipped with the outdoor unit after connecting the pipe. Completely seal the penetration part at the bottom of the pipes with insulation in order to prevent rain water from entering the conduit.
3. Cover the gap between the piping cover and pipes with a packing (field-supplied) after the insulation work is completed.

NOTICE

· If the gap is not covered, the unit may be
damaged if snow, rain water or animals enter the unit.

For Piping from Bottom Base

Communication Wiring Power Source Wiring

Liquid Pipe Gas Pipe

Cover gaps with packings (field-supplied). Install accessory rubber bushes to the wiring outlets.
For Piping from Front or Rear Side Piping Cover
Cover gaps with packings (field-supplied). InstaClol avcecregsasoprsywruitbhbeprabcuksinhegss.to(ftiehledw-siuripngploieudtl)ets.
Piping Cover

< Basic Method > If the penetration of moisture is suspected, perform "Triple Evacuation Method" that is described in the next paragraph. Step1. Vacuum until the pressure reaches 500
microns (0.5 mmHg) or lower for two hours. Step2. After vacuum pumping work, stop the vacuum
pumping and leave the gauge for one hour. Step3. Check to ensure that the pressure in the
vacuum gauge does not increase. Step4. Tighten the caps of check joint according
to the specified torque after the vacuum drying work. Step5. If the pressure inside the gauge does not reach 500 microns, it is considered that there is gas leakage. Step6. Check for any gas leakage once again. Step7. If no leakage exists, it might be moisture remains inside the pipes. Perform "Triple Evacuation Method".
< Triple Evacuation Method > According to the following [Step 1] [Step 2] [Step 3] in order, conduct vacuum drying work. Step1.
Step1-1 Vacuum until the pressure reaches 2000 microns (2.0 mmHg).
Step1-2 Pressurize with nitrogen up to 0.3 MPaG (50 PSIG) for 15 minutes.
Step1-3 Release pressure to atmosphere level less than 0.03 MPaG (5 PSIG).
Step2.
Step2-1 Vacuum until the pressure reaches 1000 microns (1.0 mmHg).
Step2-2 Pressurize with nitrogen up to 0.3 MPaG (50 PSIG) for 15 minutes.
Step2-3 Release pressure to atmosphere level less than 0.03 MPaG (5 PSIG).
Step3.
Step3-1 Vacuum until the pressure reaches 500 microns (0.5 mmHg).
Step3-2 Stop vacuum pump. Step3-3 Check that the vacuum 500 microns (0.5
mmHg) can maintain for one hour.

Power Source Wiring

Liquid Pipe

Communication Wiring
Gas Pipe

7.2 Vacuuming
< Connecting > Connect a manifold gauge, vacuum gauge and vacuum pump to the check joints (Gas Stop Valve and Liquid Stop Valve).

NOTICE
· If tools or measuring instruments come into
contact with the refrigerant, use the tools or the measuring instruments exclusively for R410A.
· Do not perform vacuum pumping work with
valves of the outdoor units open. Otherwise, the refrigerant charged before shipment may leak and it may result in failure. If moisture remains inside the pipes, the compressor may be damaged.
59

7. Air-Tight Test and Additional Refrigerant Charge

7.3 Additional Refrigerant Charge Calculation

Table 7.1 Additional Refrigerant Charge Calculation

Additional Refrigerant Charge Calculation

Although refrigerant has been charged into this unit in advance, additional refrigerant charge is required according to piping length. Determine the additional refrigerant quantity according to the following procedure, and charge the system with it. Record the additional refrigerant quantity to facilitate maintenance and servicing activities thereafter.

(1) Calculating Method of Additional Refrigerant Charge ( W kg )

No. Symbol

Contents

Additional Refrigerant Charge Calculation for Liquid Piping ( W1 kg )

Pipe Diameter (mm) 28.58 25.4 22.2 19.05 15.88 12.7 9.52 6.35

Total Piping Length (m) Refrigerant Amount for 1m Pipe (kg/m) Additional Ref. Charge (kg) ×0.67 ×0.52 ×0.36 ×0.26 ×0.17 ×0.11 ×0.056 ×0.024
Total Additional Ref. Charge For Liquid Piping

NOTE: Round off the numbers two decimal places.

Additional Refrigerant Charge Calculation for Indoor Unit ( W2 kg ) The additional refrigerant charge is required depending on the number of connected indoor units and ratio of indoor unit connection capacity ( Indoor Unit Total Capacity / Outdoor Unit Capacity ). Additional Refrigerant Charge Quantity ( kg )

Indoor Unit Capacity (HP)
0.4-1.3 1.5-2.0 2.3-3.3 4.0-6.0 8.0-12.0
16.0 20.0

Additional Charge Ref. (kg)/unit

I.U. Capacity Ratio is less than 95% I.U. Capacity Ratio is 95% or more

0.0

0.3

0.0

0.5

0.0

0.9

0.0

1.1

0.0

1.4

0.0

1.5

0.0

2.0

NOTE: 1. The table above shows the quantity of additional refrigerant charge per indoor unit.
e.g. 12 indoor units of 1.5 hp are connected and I.U. Capacity Ratio is 95% or more. 0.5kg/unit × 12 unit 6.0kg
2. The quantity of additional refrigerant based on the above calculation is must not be exceed the following formula. Maximum additional refrigerant charge = ( "Total Indoor Unit Capacity (HP)" × 0.112 ) kg or 13.2kg whitchever is bigger. ( Round off the numbers two decimal places. )

The additional refrigerant charge is required depending on the number of connected outdoor units. ( W3 kg ) Select adequate refrigerant charge from the table below.

Outdoor Unit Capacity (HP) RAS-*(H,R)NCC(L,R)(I,W)

Additional Charge Ref. (kg)/unit

0.8

1.8

W3 is not suitable for cooling only, and W3 defaults to 0kg

NOTE: The table above shows the quantity of additional refrigerant charge per outdoor unit.
e.g. RAS-480HNCCLW is 2 outdoor unit of 24HP connected. 0.8kg/unit × 2 unit 1.6kg

Additional Refrigerant Charge Quantity for Each CH-Box ( Multiple Branch Type ) Connected ( W4 kg )

If CH-Boxes ( multiple branch type ) are connected, additional refrigerant charge is required.

Select adequate refrigerant charge from the table below.

W4 is not suitable for cooling only, and W4 defaults to 0kg

CH-Box Model

CH-AP04MSSX CH-AP08MSSX CH-AP12MSSX CH-AP16MSSX

Additional Ref. Charge (kg)

0.1

0.2

0.3

0.4

Calculation of Additional Ref. Charge ( W1 + W2 +W3 + W4 ) =

Additional Ref. Charge
kg
kg kg kg kg

NOTES: 1. Some refrigerant charge calculations differ when installing Wall Type ( RPK-FSNH4M Series ) with expansion valve kit.
Refer to "Installation & Maintenance Manual". 2. Ensure that the total additional refrigerant charge quantity ( W ) should not exceed the max. additional refrigerant charge quantity shown in the table below "Table()".

(2) Charging Work Charge the system with refrigerant R410A according to "Installation & Maintenance Manual".
(3) Recording of Additional Refrigerant Charge Total refrigerant charge of this system is calculated in the following formula.

Table() < Max. Additional Refrigerant Charge Quantity >

Outdoor Unit Capacity (HP) 8,10

RAS-*CNCCL(I,W)

28.0

12,14 36.0

Max. Additional Ref. Charge (kg) 16-20 22,24 26-30 32-42 44-66 68-88 90-120 40.0 46.0 56.0 63.0 63.0 73.0 93

Total Ref. Chage =

This System

kg < Ref. Charge Amount of O.U Before Shipment (W0) kg >

Total Additional Ref. Charge: W

Total Ref. Charge:

Date of Ref.Charge Work:

W0 Outdoor Unit Ref. Charge (kg)

Outdoor Unit Capacity (HP) 8 10 12 14 16 18 20 22 24 26 28 30

RAS-*CNCCL(I,W)

5.6 5.6 8.3 8.3 9.5 10.2 10.2 11.2 11.6 11.6 11.6 11.6

Attach this label on the service cover of the outdoor unit after recording the calculation result in the blank above.
NOTE: W0 is outdoor unit Ref. charge before shipment. In case of the combination of the base units, calculate the total
ref. charge before shipment of the outdoor units to be combined.

7. Air-Tight Test and Additional Refrigerant Charge

NOTE:
· When the refrigerant is recovered or charged
because of repairing, operating or adjusting the unit, record the refrigerant quantity again.

NOTICE

· Emissions of the fluorocarbons without any
reason are prohibited.
· For disposal and maintenance of this product,
collection of fluorocarbons is required.
· Additional Refrigerant Calculation for an indoor
unit with the Expansion Valve Kit The additional refrigerant calculation for an indoor unit with the Expansion Valve Kit is as follows. Refer to item "Calculating Method of Additional Refrigerant Charge W1".

1. Firstly, calculate the additional refrigerant amount for the liquid pipe between Multi-Kit and the Expansion Valve Kit according to the piping length and diameter.
2. Then, calculate the additional refrigerant amount for the liquid pipe between indoor unit and the Expansion Valve Kit (Pipe diameter: 6.35 Refrigerant Amount for 1m Pipe: 0.011kg/m).

NOTE:
· Refer to Table 2.2 "System Combination" for
the number of indoor units and the expansion valve kit connectable to the outdoor unit.

Calculate the additional refrigerant charge quantity 0.011 kg per 1 m.

Indoor Unit

3 ~ 5 m I6.35 mm

NOTE:
· The gas staying at O-ring or screw part may
make sound when removing the cap of the spindle. However, it is not gas leakage.
4. If it is impossible to charge the specified quantity of refrigerant, follow the procedure below. a. Fully open the stop valve for the gas line.

CAUTION

· Do not apply excessive force to the spindle
valve after fully opening the spindle. Otherwise, the spindle valve flies out due to refrigerant pressure. At the test run, open fully the spindle valve, otherwise, the devices will be damaged. (It is closed before shipment.)

< Caution for Opening Stop Valve >

· Do not apply excessive force after fully opening

the spindle. (Tightening Torque: < 5.0 N·m)

(The back seat is not provided.)

· When the valve is opened, remove the tags

"Close" (Accessories) and attach the tags

"Open" (Accessories) instead.

· Tighten securely the caps according to the

tightening torque (Caution for Operation of

Stop Valves in Item 7.1) after each spindle valve

is opened.

Check Joint

(Only the charging hose for

Cap

R410A can be connected.)

Calculate the additional refrigerant charge quantity depending on the piping length and the piping size.

Expansion Valve Kit

to Outdoor Unit Multi Kit

L < 15 m: I6.35 mm 15 m or more: I9.52 mm

7.4 Charging Work
1. The additional refrigerant charge is required according to the total piping length. Refer to Table 7.1.
2. After vacuum pumping work, check that the gas stop valve and liquid stop valve are fully closed. Charge the additional refrigerant from the check joint of liquid stop valve (acceptable error must be within 0.5 kg).
3. After the refrigerant has been charged, fully open the liquid stop valve and the gas stop valve.

Hexagonal Wrench (To open or close spindle valve)
O-ring (Rubber)

Refrigerant Pressure
Spindle Valve Counterclockwise...Open Clockwise...............Close Closed before shipment

Hexagonal Wrench Size (mm)

Outdoor Unit (Base Unit) Gas Valve Liquid Valve

8 - 14 HP

Standard Type

16 - 20 HP

22 - 30 HP

b. Operate the compressor in the cooling mode and charge the additional refrigerant from the check joint of the liquid stop valve (acceptable error must be within 0.5 kg). At this time, keep the liquid stop valve slightly opened.
c. After the refrigerant is charged, fully open the liquid stop valve and the gas stop valve.
d. Calculate securely the additional refrigerant quantity for charging. If the quantity of additional refrigerant is not correct, it may
61

7. Air-Tight Test and Additional Refrigerant Charge

cause compressor failure. The additional refrigerant must be charged in a liquid condition. e. After the refrigerant is charged, fully open the liquid stop valve and the gas stop valve.

Outdoor Unit
Stop Valve (Gas Line) Stop Valve (Liquid Line)

Manifold Gauge

Nitrogen Tank (for Nitrogen Blow during Brazing and Air Tight Test)

Vacuum Pump

Siphonic Refrigerant Cylinder (R410A)
Weigher

Liquid Line Gas Line

NOTES:

Multi-Kit

Indoor Unit Insulation [Cover the gas and liquid pipe with insulation.]

· Charge the correct refrigerant quantity
according to Table 7.1. If not, a compressor may be damaged due to an excess or insufficient refrigerant charge.
· Refrigerant charge from check joint of gas stop
valve may lead to compressor failure. Be sure to charge refrigerant from the check joint of liquid stop valve.
· Insulate the liquid piping and gas piping
completely to avoid decreasing of performance and dewing on the surface of the pipe.
· Insulate the flare nut and union of the piping
connection with insulation.
· Check to ensure that there is no gas leakage. If
a large refrigerant leakage occurs, it will cause difficulty with breathing or harmful gases would occur if a fire was being used in the room.

< Caution for Refrigerant Leakage> The room where the packaged air conditioner is installed, the refrigerant gas should be controlled not to exceed the limit concentration in case of the refrigerant leakage. The refrigerant R410A of incombustible and nontoxic is adopted with this unit. If by any chance the refrigerant gas is leaked and filled in the room, the possibility of suffocation may occur. Especially for the "air365 Max" series, the outdoor unit is multi-type air conditioner by connecting multiple indoor units with long distance piping. Accordingly, the refrigerant charging quantity is larger than general individual unit. Before the indoor unit installation, confirm that the room can keep the lower gas concentration than the limit value in order to take the emergency

countermeasures even if the gas leakage is occurred.
< Calculation of Refrigerant Concentration > 1. Calculate the total quantity of refrigerant R (kg)
charged in the system connecting all the indoor units of rooms to be air-conditioned. 2. Calculate the Room Volume V (m3) of each room. 3. Calculate the refrigerant concentration C (kg/m3) of the room according to the following equation.
R: Total Quantity of Charged Refrigerant (kg) V: Room Volume (m3) = C: Refrigerant Concentration < 0.42 (kg/m3) for R410A

WARNING

· The refrigerant R410A is non-toxic and
inflammable in its original state. However, in consideration of a state where the refrigerant leaks into the room, measures against refrigerant leaks must be taken in small rooms where the tolerable level could be exceeded. Take countermeasures by installing ventilation devices, etc.
250
Range below the limit concentration of 0.42 kg/m3 200 (Countermeasures Not Needed)

Room Volume (m3)

150

Range above the limit concentration

100

of 0.42 kg/m3 (Countermeasures Needed)

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
Total Quantity Charged of Refrigerant (kg)
After calculation, the room to install this unit is proved not to keep the gas concentration lower than the limit value. However, the air conditioner should be installed in this room from unavoidable circumstances, each of the following countermeasures should be taken.
Outdoor Unit
Refrigerant Flow Refrigerant Cycle

Indoor Unit
Room where the refrigerant leakage occurs (Whole refrigerant in the cycle flows out.)
Provide an opening*1 for ventilation between rooms in order not to exceed the permissible

concentration. *1. It is opening without door or opening at the top or
bottom of door with floor space more than 0.15%.
NOTES:
<Example>

Refrigerant Charge: 60kg

Refrigerant Piping Outdoor Unit

The Smallest Room

Indoor Unit

Small Room

Medium-sized Room

Large Room

Mechanical Ventilation Equipment + Gas Leakage Detector & Alarm System

· The quantity of refrigerant gas leakage against
each room should be calculated as 60kg each.
· The refrigerant concentration must be below
0.42 kg/m3 for each room.
The installer and system specialist shall secure against leakage according to local regulations or standards. The following standards may be applicable, if local regulations are not available. International Organization for Standardization, ISO5149 or European Standard, EN378 or Japan Standard, KHKS0010.

8. Test Run
Test run should be performed according to item 8.2. And use Table 8.1 for recording test run.
WARNING
· An electrical shock will occur by residual
voltage. Turn OFF the power source completely before starting the maintenance for electrical parts. Check to ensure that no residual voltage exists after turning OFF the power source.
· Check to ensure that each wire is correctly
connected at each phase of power supply. If it is incorrectly connected, electrical parts will be damaged, the unit will not operate and the alarm code will be indicated. In this case, connect each wire correctly.
· Do not operate the system until all the check
points have been cleared. As for the test run of indoor unit, check Installation and Maintenance Manual attached to the indoor unit.

8. Test Run
8.1 Before Test Run
1. Check to ensure that the refrigerant piping and communication between outdoor unit and indoor units are connected to the same refrigerant cycle. If not, it will cause abnormal operation and a serious accident. Check that the DIP switch settings of the refrigerant cycle No. (DSW1 and RSW1 [O.U.], DSW5 and RSW2 [I.U.]) and the unit number (RSW) for the indoor units apply to the system. Confirm that the DIP switch settings on the printed circuit board of the indoor units and the outdoor units are correct. Especially, pay attention to the setting of outdoor unit No., the refrigerant cycle No. and the end terminal resistance. Refer to Chapter 6. Electrical Wiring.
2. Check to ensure that the electrical resistance is more than 1 megohm, by measuring the resistance between ground and the terminal of electrical parts. If the electrical resistance is less than 1 megohm, do not operate the system until the electrical leakage is found and repaired (Refer to "Caution for Insulation Resistance" for details.). Do not impress the voltage on the terminals for communication (Outdoor Unit: TB2 1, 2, 3, 4 / Indoor Unit: TB2 A, B, 1, 2). Otherwise, it may cause failure.
3. Check to ensure that each wire, L1, L2, L3 and N (R, S and T) is correctly connected to the power source. If it is incorrectly connected, the unit will not operate and the wired controller will indicate the alarm code "05". In this case, check and change the phase of the power source according to the sheet attached to the reverse side of the service cover.
4. Check to ensure that the switch of the main power source has been ON for more than 12 hours, to warm the compressor oil by the oil heater. "air365 Max" series outdoor unit does not operate for at most 4 hours after power supply (Stoppage Code d1-22). In case of operation within 4 hours, release the protection control as follows: a. Supply power to the outdoor unit. b. Wait for 30 seconds. c. Push PSW5 on the outdoor PCB for more than 3 seconds in order to release the d1-22.
In case of using the wired controller for release. NOTE:
· As for other remote controllers, refer to
63

8. Test Run
Installation and Maintenance Manual attached to each wired controller.
5. Be sure to close the service cover at the front lower side when the test run is performed.
6. Combination Unit Model Label In case of the combination of base units, attach the combination unit model label to a visible spot of the main unit (outdoor unit A) so that the outdoor unit A can be identified easily. Do not attach it to the sub unit (outdoor unit B and C).

CAUTION
· Caution for Insulation Resistance
If total unit insulation resistance is lower than 1 megohm, the compressor insulation resistance may be low due to refrigerant retained in the compressor. This may occur if the unit has not been used for long periods.
· Disconnect the cables to the
compressor and measure the insulation resistance of the compressor itself. If the resistance value is over 1 megohm, then insulation failure has occurred at other electrical parts.
· If the insulation resistance is less than
1 megohm, reconnect the compressor cables from the inverter PCB. Then, turn on the main power to apply current to the crankcase heater. After applying current for more than 3 hours, measure insulation resistance again. (Depending on the air conditions, pipe length or refrigerant conditions, it may be necessary to apply the current for a longer period of time.)
If the leakage breaker is activated, check the recommended size shown in Table 6.1 Electrical Data and Recommended Wiring, Breaker Size / 1 Outdoor Unit.

NOTICE

·
64

Confirm that field-supplied electrical components (main switch fuse, fuse-free breaker, earth leakage breakers, wires, conduit connectors and wire terminals) have been properly selected according to the electrical data shown in Table 6.1, and ensure that the

components comply with national and local codes.
· Use shielded wires (0.75mm2) for field wiring
to avoid electrical noise obstacle. (Total length of shielded wire shall be less than 1000m, and size of shielded wire shall comply with local codes.)
· Check the terminal for power source wiring
(terminals "L1" to "L1" and "N" to "N" of each terminal block: AC 400V, 380-415V, terminals "R" to "L1" and "S" to "L2" of each terminal block: AC 220V). If not, some components will be damaged.
8.2 Test Run
This test run method is for the wired controller (Model: PC-ARF1). As for other remote controllers, refer to Installation and Maintenance Manual attached to each wired controller.
Step1. Check to ensure that the stop valves for gas and liquid of the outdoor unit are fully opened. (In the case of combined outdoor units, check to ensure that all the stop valves of the outdoor units are fully opened.)
Step2. Perform the test run of indoor units one by one sequentially, and then check the accordance of the refrigerant piping system and the electrical wiring system. (If the multiple indoor units are operated simultaneously, the system accordance cannot be inspected.)
Step3. Perform the test run according to the following procedure. Ensure that the unit operates without any problem.
NOTE:
· In the case that 2 wired controllers (main and
sub) are installed to the system, perform the test run from the main wired controller.
< For PC-ARF1 >
Step1. Press and hold "Menu" and "Back/Help" simultaneously for at least 3 seconds. The test run menu will be displayed.
Step2. Select "Test Run" by pressing " " and press "OK". The test run screen will be displayed.
· The total number of indoor units
connected is shown on the LCD (Liquid crystal display). The twin combination (one (1) set with two (2) indoor units) is indicated as "2 units", and the triple combination (one

(1) set with three (3) indoor units) is indicated as "3 units".

Test Run Setting: 2 units

MODE :

COOL

SPEED :

AUTO

Sel.

Adj.

ON Back Rtrn

NOTES:
· When "00 unit" is shown, the auto-address
function may be performing. Cancel "Test Run" mode and set it again.
· If the indicated number is not equal to the
actual number of connected indoor units, the auto-address function is not performed correctly due to incorrect wiring, the electric noise, etc. Turn OFF the power supply, and correct the wiring after checking the following points (Do not repeat turning ON and OFF within 10 seconds.)
The power supply for the indoor unit is NOT turned ON or the incorrect wiring.
Loose Connection between Indoor Units or Wired Controller.
Incorrect Setting of Indoor Unit Address. (The indoor unit address overlaps.)
Step3. Start Test Run.
Step3-1 Press " On/Off". The test run operation will start. The operation mode, the air flow volume, the air flow direction and the test run time can be set on the test run screen. Select the item by pressing " " and set the detail by pressing " ". By default, the automatic "2-hour OFF timer" is set.
Step3-2 Check the temperature conditions. The unit operation cannot be performed if the conditions are out of range.
NOTE:
· Check the temperature conditions during the
test run. Cooling: 21.5°C DB, 15°C WB (minimum),
outdoor temperature 10°C DB or more

8. Test Run
If the system will not perform a test run, check the indoor and outdoor temperatures and humidity. (The system cannot run in cooling mode at an outdoor temperature of 10°C DB or less.)
Step4. Press " " or " ", select "LOUV." and select "
" (auto swing) by pressing " " or " ".
The auto swing operation will start. Check the operation sound of the louvers. If abnormal sound is generated from louvers, it may be caused by deformation of the air panel due to incorrect installation. In this case, install the air panel again without deformation. If abnormal sound is not generated, press " " or " " again to stop the auto swing operation. Step5. Though the temperature detections by the thermistors are invalid, the protection devices are valid during the test run. If an alarm occurs, refer to Table 8.2 Alarm Code and perform troubleshooting. Then perform the test run again. Step6. Use the label "Checking Method by 7-Segment Display" attached to the back side of the service cover of the outdoor unit to check the temperature, the pressure and the operation frequency of the specified portions, and check the number of the connected indoor units on the 7-segment display. Step7. To finish the test run, wait for 2 hours (as default setting) or press " On/Off" switch again.
Step7-1 Flashing of the " On/Off" switch (2 seconds ON, 2 seconds OFF) indicates an abnormality in the communication between the indoor unit and the wired controller (loosened or disconnected connector, disconnected wires, or incorrect wiring etc.)
Step7-2 A small sound may be heard from the outdoor unit after turning ON the power source because the electrical expansion valve is activated to adjust the opening. Therefore, this is not an abnormality of the unit.
Step7-3 Sound may be heard from the outdoor unit for a few seconds after running or stopping the compressor, starting or finishing defrosting, etc. This sound is due to the pressure difference inside the piping from the compressor. Therefore, this is not an abnormality of the unit.
65

8. Test Run

WARNING
· Do NOT operate the air conditioner to check the electrical wiring, etc. until the preparation of the
test run is completed. Table 8.1 Test Run and Maintenance Record

MODEL: CUSTOMER'S NAME AND ADDRESS:

SERIAL No.

COMPRESSOR MFG. No. DATE:

1. Is the rotation direction of the indoor fan correct?

2. Is the rotation direction of the outdoor fan correct?

3. Are there any abnormal compressor sounds?

4. Has the unit been operated for at least twenty (20) minutes?

5. Check Room Temperature

Inlet: No. 1 DB /WB oC, No. 2 DB /WB oC, No. 3 DB /WB oC, No. 4 DB /WB oC

Outlet:

DB /WB oC,

DB /WB oC

Inlet: No. 5 DB /WB oC, No. 6 DB /WB oC, No. 7 DB /WB oC, No. 8 DB /WB oC

Outlet:

DB /WB oC,

DB /WB oC

6. Check Outdoor Ambient Temperature

Inlet: DB

oC, WB

Outlet: DB

oC, WB

7. Check Refrigerant Temperature

Liquid Temperature:

Discharge Gas Temperature:

8. Check Pressure

Discharge Pressure:

MPa

Suction Pressure:

MPa

9. Check Voltage

Rated Voltage:

Operating Voltage:

L1-L2

V, L1-L3

V, L2-L3

Starting Voltage:

Phase Imbalance:

V= Vm

10. Check Compressor Input Running Current

Input:

Running Current:

11. Is the refrigerant charge adequate?

12. Do the operation control devices operate correctly?

13. Do the safety devices operate correctly?

14. Has the unit been checked for refrigerant leakage?

15. Is the unit clean inside and outside?

16. Are all cabinet panels fixed?

17. Are all cabinet panels free from rattles?

18. Is the filter clean?

19. Is the heat exchanger clean?

20. Are the stop valves open?

21. Does the drain water flow smoothly from the drain pipe?

8. Test Run

Table 8.2 Alarm Code

Code Category

Content of Abnormality

01 Indoor Unit Activation of Protection Device (Float Switch)

Outdoor Unit

Activation of Protection Device (High Pressure Cut)

Abnormal Communication between Indoor Units and Outdoor Units

Communication

Abnormal Communication between Inverter PCB and Outdoor PCB

Leading Cause
Activation of Float Switch (High Water Level in Drain Pan, Abnormality of Drain Pipe, Float Switch, or Drain Pan)
Activation of PSH (Pipe Clogging, Excessive Refrigerant, Inert Gas Mixing)
Incorrect Wiring, Loose Terminals, Disconnected Communication Cable, Blowout of Fuse, Indoor Unit Power OFF
Inverter PCB-Outdoor PCB Communication Failure (Loose Connector, Wire Breaking, Blowout of Fuse)

05 Supply Phase Abnormality of Power Supply Phases

Incorrect Power Supply, Connection to Reversed Phase, Open-Phase

Voltage Abnormal Inverter Voltage

Decrease in Discharge Gas Superheat

Cycle

Increase in Discharge Gas Temperature

Communication

Abnormal Communication between Outdoor Units

Incorrect Outdoor Unit Address Setting

Outdoor Unit

Incorrect Outdoor Unit Main Unit Setting

Outdoor Voltage Decrease, Insufficient Power Capacity
Excessive Refrigerant Charge, Failure of Thermistor, Incorrect Wiring, Incorrect Piping Connection, Expansion Valve Locking at Opened Position (Disconnect Connector)
Insufficient Refrigerant Charge, Pipe Clogging, Failure of Thermistor, Incorrect Wiring, Incorrect Piping Connection, Expansion Valve Locking at Closed Position (Disconnect Connector)
Incorrect Wiring, Breaking Wire, Loose Terminals
Duplication of Address Setting for Outdoor Units (Sub Units) in Same Refrigerant Cycle Number
Two (or more) Outdoor Units Set as "Main Unit" Exist in Same Refrigerant Cycle Number

Abnormality of Inlet Air Thermistor

Abnormality of Outlet Air Thermistor

Abnormality of Freeze Protection Thermistor

Sensor on Abnormality of Gas Piping Thermistor

Indoor Unit

Abnormality of Outdoor Air Thermistor (Econo Fresh)

Incorrect Wiring, Disconnecting Wiring, Breaking Wire, Short Circuit

Abnormality of Remote Sensor (DOAS)

Abnormality of Thermistor Built-in Remote Controller (DOAS)

Abnormality of Indoor Fan System

Indoor Fan

Abnormality of Indoor Fan Motor (Step-Out), Indoor Fan Controller Failure

Motor

Activation of Protection Device for Indoor Fan Fan Motor Overheat, Lockup

Abnormality of Fin Thermistor or Fan Controller,

Abnormality of Fan Controller Fin Temperature Heat Exchanger Clogging, Abnormality of Fan

Motor

Activation of Overcurrent Protection

Indoor Fan Controller

Problem with Current Sensor

Activation Fan Controller Protection

Abnormality of Fan Motor
Abnormality of Fan Controller Current Sensor
Driver IC Error Signal Detection, Instantaneous Overcurrent

Abnormality of Indoor Fan Controller Voltage

Indoor Voltage Decrease, Insufficient Capacity of Power Supply Wiring

8. Test Run

Code Category

Content of Abnormality

Leading Cause

Abnormality of High Pressure Sensor

Abnormality of Outdoor Air Thermistor

Sensor on Outdoor Unit

Abnormality of Discharge Gas Thermistor on Top of Compressor

Incorrect Wiring, Disconnecting Wiring, Breaking Wire, Short Circuit

Abnormality of Heat Exchanger Liquid Pipe Thermistor

Abnormality of Low Pressure Sensor

Connection of CH-Box to Heat Pump System,

Disconnection of CH-Box to Heat Recovery

Incorrect DSW Settings of Outdoor Unit for CH- System

Box

CH Unit(Generation 1 model) and CH-

Box(Generation 2 model) are used in the same

system together.

System

Incorrect Capacity Setting of Outdoor Unit and Indoor Unit

Incorrect Capacity Setting of Outdoor Unit and Indoor Unit, Excessive or Insufficient Indoor
Unit Total Capacity Code

Incorrect Setting of Indoor Unit No.

Duplication of Indoor Unit No. In same Refrigerant Cycle Number

Incorrect of Indoor Unit Combination

Indoor Unit is Designed for R22

Abnormality of Picking up Circuit for Protection Failure of Protection Detecting Device (Incorrect

in Outdoor Unit

Wiring of Outdoor PCB)

Abnormality of Outdoor Unit Capacity

Outdoor Unit Capacity > 120HP

Incorrect Setting of Outdoor Unit Models Combination or Voltage

Incorrect Setting of Main and Sub Units(s) Combination or Voltage

Outdoor Unit Abnormal Communication between Main Unit Incorrect Wiring, Disconnect Wire, Breaking

and Sub Unit(s)

Wire, PCB Failure

Abnormal Combination between Inverter PCB Incorrect Combination between Inverter PCB

and Outdoor PCB

Activation of Pressure Ratio Decrease Protection

Defective Compression (Failure of Compressor or Inverter, Loose Power Supply Connection)

Activation of Low Pressure Increase Protection

Overload at Cooling, Expansion Valve Locking at Open Position (Loose Connector)

Overload Operation (Heat Exchanger Clogging,

Protection Activation of High Pressure Increase Protection Short Circuit of Airflow), Pipe Clogging,

Device

Excessive Refrigerant, Inert Gas Mixing

Insufficient Refrigerant, Piping Clogging,

Activation of Low Pressure Decrease Protection Expansion Valve Locking at Close Position

(Loosen Connector)

Activation of Inverter Overcurrent Protection Overload Operation, Compressor Failure

Sensor Abnormal Inverter Current Sensor

Current Sensor Failure

Driver IC Error Signal Detection (Protection for

Inverter Error Signal Detection

Overcurrent, Voltage Decrease, Short Circuit),

Instantaneous Overcurrent

Inverter

Abnormality of Inverter Fin Temperature

Abnormal Inverter Fin Thermistor, Heat Exchanger Clogging, Fan Motor Failure

Inverter Failure

Inverter PCB Failure

Driver IC Error Signal Detection (Protection for

Activation of Fan Controller Protection

Overcurrent, Voltage Decrease, Short Circuit),

Instantaneous Overcurrent

Abnormality of Fan Controller Fin Temperature

Fin Thermistor Failure, Heat Exchanger Clogging, Fan Motor Failure

Fan Controller

Activation of Overcurrent Protection

Fan Motor Failure

Abnormality of Fan Controller Sensor

A1 External Input Detection of External Abnormality

Failure of Current Sensor (Instantaneous Overcurrent, Increase of Fin Temperature, Voltage Decrease, Grand Fault, Step-Out)
Input Signal by External Abnormality Detection Setting

8. Test Run

Code b0 b1 b2 b5 b6
EE

Category Indoor Unit Compressor

Content of Abnormality

Leading Cause

Incorrect Setting of Unit Model Code

Incorrect Setting of Indoor Unit Model

Incorrect Setting of Unit and Refrigerant Cycle 64 or More Number is Set for Address or

Number

Refrigerant Cycle

Abnormality of EEPROM
Incorrect Indoor Unit No. Setting
Abnormal Communication between Indoor PCB and Indoor Fan Controller

EEPROM failure, Incorrect Data of EEPROM
There are 17 or More Non-Corresponding to H-LINK II Units are Connected to One System.
Communication Failure, Disconnected Communication Cable, Abnormal Connection

Compressor Protection Alarm (It cannot be reset from Wired Controller)

This alarm code appears when the following alarms* occurs three times within 6 hours. *02, 07, 08, 39, 43 to 45, 47

9. Safety and Control Device Setting

Compressor Protection The compressor is protected by the following devices and their combinations.

1. High Pressure Switch: This switch cuts out the operation of the compressor when the discharge pressure exceeds the setting.
2. Oil Heater: This band type heater protects against oil foaming during cold starting, as it is energized while the compressor is stopped.

(Standard Type)

Model

For Compressor Pressure Switches

High

Cut-Out

Cut-In

RAS080CNCCLI

MPa

4.15

-0.05 -0.15

MPa 3.20 ±0.15

RAS-

100CNCCLI 120CNCCLI 140CNCCLI 160CNCCLI

Automatic Reset, Non-Adjustable

(each one for each compressor)

4.15

-0.05 -0.15

4.15

-0.05 -0.15

4.15

-0.05 -0.15

4.15

-0.05 -0.15

3.20 ±0.15 3.20 ±0.15 3.20 ±0.15 3.20 ±0.15

RAS180CNCCLI

4.15

-0.05 -0.15

3.20 ±0.15

Fuse Capacity

3N~, 380-415V, 50Hz 3N~, 380V, 60Hz

Oil Heater Capacity (pcs/unit)

CCP Timer

Setting Time

min.

For DC Fan Module

Fuse Capacity

3N~, 380-415V, 50Hz 3N~, 380V, 60Hz

50 40.8 x 1
3
10

40.8 x 1

Non-Adjustable

63 40.8 x 1
3
10

Model
For Compressor Pressure Switches

RAS200CNCCLI

RAS-

220CNCCLI 240CNCCLI 260CNCCLI 280CNCCLI

Automatic Reset, Non-Adjustable

(each one for each compressor)

RAS300CNCCLI

High

Cut-Out

MPa

4.15

-0.05 -0.15

Cut-In MPa 3.20 ±0.15

Fuse Capacity

3N~, 380-415V, 50Hz 3N~, 380V, 60Hz

Oil Heater Capacity (pcs/unit)

CCP Timer

63 40.8 x 1

Setting Time

min.

For DC Fan Module

Fuse Capacity

3N~, 380-415V, 50Hz 3N~, 380V, 60Hz

4.15

-0.05 -0.15

3.20 ±0.15

50 40.8 x 2
3

4.15

-0.05 -0.15

3.20 ±0.15

4.15

-0.05 -0.15

3.20 ±0.15

40.8 x 2

Non-Adjustable

4.15

-0.05 -0.15

3.20 ±0.15

63 40.8 x 2
3

4.15

-0.05 -0.15

3.20 ±0.15

63 40.8 x 2
3

Memo

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