actionair MultiElite 2 MRC-075CS-3 User manual

Installation and Commissioning Guide
CAUTION:
The system is charged with flammable refrigerant, safety checks are necessary to ensure that the risk of ignition is minimised.
That’s better. That’s Actron.
MultiElite 2
Multi Split System Air Conditioner
IMPORTANT NOTE:
Please read this manual carefully before installing or operating your air conditioning unit. Make sure to save this manual for
future reference.
Model Numbers
MRC-075CS-3
MRC-100CS-4
MRC-120CS-5

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Installation and Commissioning Guide Multi Split System
Table of Contents
. Symbols ........................................................................................................................................... 
. Inspection ....................................................................................................................................... 
. Product Inspections 
. Codes, Regulations and Standards 
. General Information ........................................................................................................................ 
. Safety Instructions .......................................................................................................................... 
. Installation Information .................................................................................................................. 
. Components ................................................................................................................................... 
. Installation Overview ...................................................................................................................... 
. Specifications ................................................................................................................................ 
. Outdoor Unit Installation .............................................................................................................. 
. Outdoor Unit Installation Instructions 
. Unit Mounting Dimensions 
. Refrigerant Piping Connection ..................................................................................................... 
. Wiring ............................................................................................................................................ 
. Outdoor Unit Wiring 
. Wiring Figure 
. Wiring Diagram ............................................................................................................................. 
. Air Evacuation ............................................................................................................................... 
. Refrigerant Charge Details 
. Safety And Leakage Check 
. Test Run ......................................................................................................................................... 
. Automatic Wiring/Piping Correction Function ............................................................................. 
MUST BE INSTALLED BY A LICENSED
ELECTRICIAN
D I Y
DIY
DIY
ALL ELECTRICAL WORK
MUST BE PERFORMED
BY A LICENSED ELECTRICIAN
FOR COMPLIANCE WITH QUEENSLAND
ELECTRICAL SAFETY REGULATIONS 2013
This refers to electrical works only
This manual is a controlled document which contains confidential and proprietary information.
Distribution, modification, copying and/or reproduction are prohibited without written consent from ActronAir
Product design and specifications are subject to change without prior notice for product improvement.
READ SAFETY PRECAUTIONS BEFORE INSTALLATION
Incorrect installation due to ignoring instructions can cause serious damage or injury. The seriousness of
potential damage or injuries is classified as either a WARNING or CAUTION.
CAUTION
Failure to observe a caution may result in injury or equipment damage.
Failure to observe a warning may result death or serious injury.
WARNING

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. Symbols
Explanation of symbols displayed on the air conditioner. Information About This Guide
This symbol shows that this appliance uses a flammable refrigerant. If the refrigerant leaks and
exposed to an external ignition source, there is a risk of fire.
This symbol shows that the Operation Manual should be read carefully.
This symbol shows that a service person should be handling this equipment with reference to the
Installation Manual.
This symbol shows that there is information included in the Operation Manual and Installation
Manual.
. Inspection
02.01. Product Inspections
Check your air conditioning unit and all items against the invoice upon receiving your shipment. Inspect the unit,
components and accessories for any sign of damage. If there is any damage to the unit, contact ActronAir Customer Care
Department immediately on: 1300 522 722 to obtain a Goods Return Number.
Check the unit nameplate to verify the model, serial number, electrical rated specifications are correct.
02.02. Codes, Regulations and Standards
The installer and/or contractor assumes responsibility to ensure that unit installation complies with the relevant council,
state / federal codes, regulations and building code standards. All electrical wiring must be in accordance with current
electrical authority regulations and all wiring connections to be as per electrical diagram provided with the unit.
. General Information
The ActronAir air conditioning units are designed for applications where superior performance, high efficiency, reliability,
supply air quality and quiet operation are the prime priorities.
For optimum efficiency, your air conditioning unit will deliver just the right amount of cooling or heating capacity you
demand. Even in extreme conditions, the unit will still supply the required demand at peak performance.
Energy Efficient Refrigeration Circuits
The ActronAir system is designed with a split ducted refrigeration circuit that delivers only the amount of cooling or
heating actually required to maintain your desired comfort at the most optimum efficiency.
Each refrigeration circuit consists of:
•High efficiency inverter scroll compressor.
•Gold hydrophilic coat coil protected condenser designed for optimum performance and efficiency with corrugated
fins and riffled tubing.
•Gold hydrophilic coat coil protected evaporator coil designed for optimum performance and efficiency with lanced
fins and riffled tubing.
Evaporator Section
The evaporator section has DC fans which deliver just the right amount of airflow, depending on requirements. The fans
provide superior performance for your comfort at optimum efficiency:
•Highly efficient variable speed DC motor that uses less energy.
•Easy variable indoor fan commissioning via intelligent controllers.
•Low noise operation.

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Condenser Section
Single DC inverter fan motor, with the following features:
•Low noise operation.
•Inverter rotary compressor.
Electrical Section
The electrical section is composed of a separate panel for controls, protecting the components from the elements.The electrical section is composed of a separate panel for controls, protecting the components from the elements.
Durable Design and Construction
ActronAir is an Australian manufacturer with proven high quality air conditioning products. Known for their durability andActronAir is an Australian manufacturer with proven high quality air conditioning products. Known for their durability and
reliable performance, these products are designed and built to withstand the extreme weather conditions.reliable performance, these products are designed and built to withstand the extreme weather conditions.
The galvanized steel cabinet, with powder coated epoxy enamel finish, resists the toughest conditions.The galvanized steel cabinet, with powder coated epoxy enamel finish, resists the toughest conditions.
Gold Hydrophillic Coat Coil Protection heat exchangers ensures an enhanced heat transfer with increased performance
efficiency.
System Flexibility
The ActronAir air conditioning units are the first choice for residential, office, schools and other air conditioning facilities
applications, both for new construction or retrofitting projects.
Refrigerant Handling and Accountability
ActronAir strongly urges that all service technicians make every effort to eliminate the emission of refrigerants to the
atmosphere. Everyone must act in a responsible manner to conserve refrigerants.
Sustainability and Environmentally Friendly
The air conditioning system is supplied with a zero ozone depleting low GWP R-32 refrigerant, which has no phase out or
replacement concern.
With cooling and heating performance capacity that are among the best in the market, the ActronAir air conditioning
units provide the solution for the reduction of energy consumption, COemission, high fuel dependency and high
network grid demand.
. Safety Instructions
•Only licensed HVAC technicians* should install and service this air conditioning equipment. Improper service or
alteration by an unqualified technician could result in significant and major damage to the product or property which
may render your warranty null and void. Such unqualified service could also lead to severe physical injury or death.
Follow all safety instructions in this literature and all warning labels that are attached to the equipment.
•Prevailing WH&S regulations must be observed and will take precedence to the safety instructions contained on
this manual. Safe work practices and environment must be the paramount importance in the performance of all the
service procedures.
•Ensure that unit installation complies with relevant council regulations and building code standards.
•All electrical wiring must be in accordance with current electrical authority regulations and all wiring connections to
be as per electrical diagram provided.
•Secure the fans against accidental contact. Beware of pinch point and sharp edges which can cause cutting injury.
•Always wear appropriate PPE, remove any dangling jewellery and protect long hair by wearing a cap.
•Make sure that safety guards and panel covers are always firmly secured and not damaged.
•This appliance is not intended for use by young children or infirm persons unless they have been adequately
supervised by a responsible person to ensure that they can use the appliance safely. Young children should be
supervised to ensure that they do not play with the appliance.
•Installer must incorporate a means of electrical disconnection (isolator) in the sub mains fixed wiring in accordance
with the latest version of the AS/NZS 3000 (also known as Australian Wiring Rules).
•Secure the power cords and control cables that goes in/out the unit.
*Qualifications required will be appropriate Electrical, Refrigeration and Refrigerant Handling License and Training
dependent on local State/Territory regulations.

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DANGER
Hazardous Voltage - Risk of Electrocution.
Turn Off the power from main isolator before proceeding with any service work of the unit. Observe proper
LOCK-OUT/TAG-OUT (LOTO) procedures for electrical appliances in order to prevent accidental switching-on of the power
supply. Extreme care and caution must be observed should there be a need to work on live circuit.
WARNING
This air conditioning unit contains R-32 refrigerant (CLASS A2L) which is mildly flammable.
Thoroughly read and understand the accompanying R-32 Safety Guide for installation and maintenance instructions.
Installation, service, maintenance, repairs and decommissioning of this unit must be performed by a licensed HVAC technician;
qualified to handle R-32 refrigerant.
R-32 refrigerant is odorless if the refrigerant gas comes into contact with fire, it may emit a poisonous gas.
Appliance shall be installed, operated and stored in a well ventilated area:
• where the room size corresponds to the room area as specific for operation.
• without continuously operating open flames (for example an operating gas appliance) and ignition sources (for example an
operating electric heater).
• away from other potential continuously operating sources that known to cause ignition of R-32 refrigerant.
CAUTION
Beware of Rotating Fans!
Ensure that indoor and outdoor fans are isolated and have come to a complete stand still before servicing the equipment.
Beware of pinch point and sharp edges which can cause cutting injury. Secure the fans against accidental contact.
Always wear appropriate PPE and remove any dangling jewellery and protect long hair by wearing a cap. Ensure that no loose
clothing can be caught / entangled in moving parts.
VISUAL INSPECTION AND WORK ASSESSMENT
Work areas and conditions must first be assessed and evaluated for any potential hazardous conditions. It is also important to be
familiar with the unit parts and components before proceeding with any service task.
NOTE
Fuse Specifications
The air conditioner’s circuit board (PCB) is designed with a fuse to provide over current protection. The specifications of the fuse
are printed on the circuit board such as: T30A/250VAC and T3.15A/250VAC (for 7kW units), T30A/250VAC and T5A/250VAC (for
10kW and 12kW units).
For the units with R-32 refrigerant , only the blast-proof ceramic fuse can be used.

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. Installation Information
All service technicians handling this unit must be licensed to handle R-32 refrigerant.
Recover and Recycle Refrigerants
Never release refrigerant to the atmosphere! It is an offence in Australia to do so. Always recover, recycle and reuse
refrigerants. When removing from the system, properly contain and identify refrigerants in its dedicated container for
proper disposal and/or storage. Always consider the recycle or reclaim requirements of the refrigerant before beginning
the recovery procedures. Obtain a chemical analysis of the refrigerant if necessary. For the recovered refrigerant and
acceptable refrigerant quality refer to the existing standards and regulations.
Refrigerant Handling and Safety
Consult the refrigerant manufacturer’s Material Safety Data Sheet (MSDS) for information on proper handling and to
fully understand health, safety, storage and disposal requirements. Use the approved containment vessels and refer to
appropriate safety standards. Comply with all applicable transportation standards when shipping refrigerant containers.
Service Equipment and Recovery Procedures
Always use refrigerant reclaiming equipment in order to minimise refrigerant emissions. Use equipment and methods
which will pull the lowest possible system vacuum while recovering and condensing refrigerant. Equipment capable of
pulling a vacuum of less than 500 microns is required.
Do not open the system to the atmosphere for service work until refrigerant is fully removed and/or recovered. Perform
refrigeration system evacuation, prior to charging, in accordance with AIRAH / IRHACE Refrigerant handling code of
practice.
Let the unit stand for 1 hour and with the vacuum not rising above 500 microns. A rise above 500 microns indicates a leak
from the system and a leak test is required to locate and repair any leak.
Charge refrigerant into the system only after the equipment does not leak or contain moisture. Take into consideration
the correct amount of refrigerant charge specified for the system to ensure efficient unit operations. When charging
is complete, reclaim refrigerant from charging lines into an approved refrigerant container. Seal all used refrigerant
containers with approved closure devices to prevent unused refrigerant from escaping to the atmosphere. Take extra
care to maintain all service equipment directly supporting refrigerant service work such as gauges, hoses, vacuum pumps
and recycling equipment.
INSTALLATION PREPARATION (Pre-Installation considerations)
The following items must be considered before beginning the unit installation:
•Verify the unit capacities and ratings with the unit nameplate.
•Make certain the floor or foundation is level, solid and has sufficient structural strength to support the unit and
accessories weight.
•Install anti-vibration rubber (installer to supply) under all of the unit’s feet to help reduce noise and minimize
vibration transfer through the foundation. Ensure that all anti-vibration rubbers are rated to provide stable support
without impairing the unit’s structural integrity.
•Diameter or width of anti-vibration rubber’s must be at least equal to the width of the actual feet to prevent
deformation overtime.
•Allow minimum recommended clearances for periodic maintenance and service access.
•Allow sufficient space beside the unit for the outdoor air discharge. Condenser air inlet, located on the coil side of the
unit, requires sufficient airflow clearance for the optimum unit performance.
•Note the conditioned supply air and return air location. Ensure sufficient spaces are allocated for these purposes.
•For the connection and location of condensate drain in the unit, refer to the drawings and dimensions section of this
manual.
•Wiring connections must be in accordance with the wiring diagram provided with the unit.
•Make sure all wirings are in accordance with local electricity authority regulations and standards.
•Do not install the unit close to an area where there is a danger of fire due to volatile, explosive, flammable and/ or
hazardous materials.
•Ensure that spaces around the unit are free from any obstructions for optimum unit performance.

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•Installer to ensure correct size/type that main circuit breaker and cable is installed in unit sub-mains to protect the
sub-mains and unit wiring.
•Installer to ensure correctly rated residual current device (RCD) is installed as per the latest version of the AS/NZS
3000 (also known as Australian Wiring Rules).
NOTE
This outdoor unit is designed to match only with the ActronAir indoor unit as specified in the Technical Selection Catalogue.
This unit is designed for use with R-32 refrigerant only.
The unit is supplied with factory charged R-32 refrigerant. Be aware of all the relevant regulations concerning the handling of
refrigerant.
. Components
The air conditioning system comes with the following components. Use all of the installation parts and accessories
to install the air conditioner. Improper installation may result in water leakage, electrical shock and fire, or cause the
equipment to fail. The items are not included with the air conditioner must be purchased separately.
Name of Accessories Quantity Illustration
Owner’s Manual 1
CAUTION:
Thesystemis charged with flammable refrigerant, safety checks are necessary to ensure that the risk of ignition is minimised.
That’s better. That’s A ctron.
MultiElite 2
Multi Split System Air Conditioner
IMPORTANTNOTE:
Pleasereadthis manual carefully before installing or operating your air conditioning unit. Make sure to save this manual for
futurereference.
ModelNumbers
MRC-075CS-3
MRC-100CS-4
MRC-120CS-5
Owner'sManual
Installation Manual 1
CAUTION:
Thesystemis charged with flammable refrigerant, safety checks are necessary to ensure that the risk of ignition is minimised.
That’s better. That’s A ctron.
MultiElite 2
Multi Split System Air Conditioner
IMPORTANTNOTE:
Pleasereadthis manual carefully before installing or operating your air conditioning unit. Make sure to save this manual for
futurereference.
ModelNumbers
MRC-075CS-3
MRC-100CS-4
MRC-120CS-5
Installationand Commissioning Guide
Safety Guide 1
Drain Joint 1
Seal Ring 1
Rubber Pipe Insulation 1
Self-Tapping Screw 4
Magnetic Ring
MRC-075CS-3 1
MRC-100CS-4 8
MRC-120CS-5 5

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Name of Accessories Model Adaptor Quantity Illustration
Pipe Adaptor
NOTE:
Pipe size may differ from
appliance to appliance. To
meet the different pipe size
requirements, sometimes the
pipe connections need the
adaptor to be installed to the
outdoor unit.
MRC-075CS-3 Ø9.52 - Ø12.7 1
MRC-100CS-4
Ø12.7 - Ø9.52 1
Ø12.7 - Ø15.88 1
Ø9.52 - Ø6.35 1
Ø9.52 - Ø12.7 1
MRC-120CS-5
Ø12.7 - Ø9.52 1
Ø12.7 - Ø15.88 1
Ø6.35 - Ø9.52 1
Ø9.52 - Ø12.7 3
Optional accessories
There are two types of remote controls: wired and wireless. Select a remote controller based on customer preferences
and requirements and install in an appropriate place.
Refer to catalogues and technical literature for guidance on selecting a suitable remote controller

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. Installation Overview
Installation Order
INSTALLATION ORDER
1
2
3
4
5
Install the outdoor unit
Evacuate the refrigeration
system
Connect the wires
Connect the refrigerant pipes
Perform a test run
Installation
Summary
Connecting pipe assembly Connect the Wires
Perform a test run
Connecting the refrigerant pipes
Leak Testing, Air Evacuation
and Charging Refrigeration
System

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. Specifications
Table 08.1
Indoor units that can be used in combination Number of connected units 1 to 5
Compressor stop/start frequency Stop time 3 min or more
Power source voltage Voltage supply 230VAC
Voltage fluctuation +10% to -6% of rated voltage
1 Outdoor
Table 08.2 3 Indoor 4 Indoor 5 Indoor
Minimum Field Pipe Length (m) - 1 indoor unit 9 12 12
Maximum length for all rooms (m) 60 80 80
Maximum length for one indoor unit (m) 30 35 35
Maximum height different between indoor and
outdoor units (m)
OU higher than IU 15 15 15
OU lower than IU 15 15 15
Maximum height difference between indoor units (m) 10 10 10
NOTE
The installation must be performed in accordance with the requirement of local and national standards. The installation may
be slightly different in different areas.
When installing multiple indoor units with a single outdoor unit, ensure that the length of the refrigerant pipe and the
height dereference between the indoor and outdoor and indoor to indoor units meet the following requirements:
Unit: m/ft.

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. Outdoor Unit Installation
Install the unit by following local codes and regulations , there may be differ slightly between different regions.
Outdoor Unit
Installation
Installation Instructions – Outdoor unit
SPECIAL CONSIDERATIONS FOR EXTREME
WEATHE R
600mm above
300mm from
back wall
2000mm
in front
600mm
on right
300mm
on left
09.01. Outdoor Unit Installation Instructions
Step 1. Select Installation Location
Before installing the outdoor unit, you must choose an appropriate location. The following are standards that will help
you choose an appropriate location for the unit.
Proper installation locations meet the following standards:
1. Meets all spatial requirements shown in Installation Space Requirements above.
2. Good air circulation and ventilation
3. Firm and solid: the location can support the unit and will not vibrate
4. Noise from the unit will not disturb others
5. Protected from prolonged periods of direct sunlight or rain
6. Where snowfall is anticipated, take appropriate measures to prevent ice buildup and coil damage.
DO NOT install unit in the following locations:
1. Near an obstacle that will block air inlets and outlets
2. Near a public street, crowded areas, or where noise from the unit will disturb others
3. Near animals or plants that will be harmed by hot air discharge
4. Near any source of combustible gas
5. In a location that is exposed to large amounts of dust
6. In a location exposed to a excessive amounts of salty air

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Special Consideration For Extreme Weather
If the unit is exposed to heavy wind:
Install unit so that air outlet fan is at a 90° angle to the direction of the wind. If needed, build a barrier in front of the
unit to protect it from extremely heavy winds.
See Figures below.
Outdoor Unit
Installation
Installation Instructions – Outdoor unit
SPECIAL CONSIDERATIONS FOR EXTREME
WEATHER
If the unit is frequently exposed to heavy rain or snow:
Build a shelter above the unit to protect it from the rain or snow. Be careful not to obstruct air flow around the unit.
If the unit is frequently exposed to salty air (seaside):
Use outdoor unit that is specially designed to resist corrosion.
Step 2. Install Drain Joint (Heat Pump Unit Only)
Before bolting the outdoor unit in place, you must install the drain joint at the bottom of the unit. Note that there are
two different types of drain joints depending on the type of outdoor unit.
If the drain joint comes with a rubber seal (see Fig. A ), follow steps below.
1. Fit the rubber seal on the end of the drain joint that will connect to the outdoor unit.
2. Insert the drain joint into the hole in the base pan of the unit.
3. Rotate the drain joint 90° until it clicks in place facing the front of the unit.
4. Connect a drain hose extension (not included) to the drain joint to redirect water from the unit during heating
mode.
If the drain joint doesn’t come with a rubber seal (see Fig. B ), follow steps below.
1. Insert the drain joint into the hole in the base pan of the unit. The drain joint will click in place.
2. Connect a drain hose extension (not included) to the drain joint to redirect water from the unit during heating
mode.
IN COLD CLIMATES
UNIT MOUNTING DIMENSIONS
Split Type Outdoor Unit
Insert the drain joint into the hole in the base
seal

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CAUTION
In Cold Climates
Make sure that the drain hose is as vertical as possible to ensure swift water drainage. If water drains too slowly, it can
freeze in the hose and flood the unit.
Step 3. Anchor Outdoor Unit
The outdoor unit can be anchored to the ground or to a wall-mounted bracket with bolt(M10). Prepare the installation
base of the unit according to the dimensions below.
09.02. Unit Mounting Dimensions
The following is a list of different outdoor unit sizes and the distance between their mounting feet. Prepare the
installation base of the unit according to the dimensions below.
Split Type Outdoor Unit
IN COLD CLIMATES
UNIT MOUNTING DIMENSIONS
Split Type Outdoor Unit
Insert the drain joint into the hole in the base
seal
IN COLD CLIMATES
UNIT MOUNTING DIMENSIONS
Split Type Outdoor Unit
Insert the drain joint into the hole in the base
seal
Outdoor Unit Specifications Table
Model Number Outdoor Unit Dimensions
W x H x D
Mounting Dimensions
(Centre to Centre)
A (mm) B (mm)
MRC-075CS-3 890 x 673 x 342 663 354
MRC-100CS-4 946 x 810 x 410 673 403
MRC-120CS-5 946 x 810 x 410 673 403

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Rows of Series Installation
The relations between H, A and L are as follows.
L A
L  H L ≤ 1/2H 250mm or more
1/2H < L ≤ H 300mm or more
L > H Can not be installed
Outdoor Unit Installation
When Select a 24K Indoor Unit
Connective pipe size of an A and B system
(unit: inch)
Indoor Unit capacity
(Btu/h) Liquid Gas
Notes On Drilling Hole In Wall
NOTE:
(unit: mm/inch)
Outdoor Unit Dimensions
W x H x D
Mounting Dimensions
Distance A Distance B
Rows of series installation
The relations between H, A and L are
as follows.
1500mm
or more
250mm
or more
250mm
or more
600mm
or more 3000mm or more

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Drilling Hole In Wall
You must drill a hole in the wall for the refrigerant piping, and the signal cable that will connect the indoor and
outdoor units.
1. Determine the location of the wall hole based on the location of the outdoor unit.
2. Using a 65mm (2.5 in) core drill, drill a hole in the wall.
NOTE
When drilling the wall hole, make sure to avoid wires, plumbing, and other sensitive components.
3. Place a protective wall cuff in the hole. This protects the edges of the hole and helps seal it when you finish the
installation process.
Connecting 7k Indoor Unit
The 7kW indoor unit can only be connected to the A port, if there are two 7kW indoor units, they can be connected to
A and B port. (See Fig. below). Please use pipe adaptors provided.
Connecting Pipe Size of Indoor Units
Indoor Unit Capacity
(kW)
Liquid
(mm)
Gas
(mm)
2.6 / 3.5 6.35 9.52
5.0 / 5.3 6.35 12.70
7.0 9.5 2 15.88
Connecting Pipe Size of Outdoor Units
Reference
Location
MRC-075CS-3 MRC-100CS-4 MRC-120CS-5
Gas Line Liquid Line Gas Line Liquid Line Gas Line Liquid Line
E - - - - Ø9.52 (3/8")
Ø6.35 (1/4")
D - - Ø9.52 (3/8")
Ø6.35 (1/4")
Ø9.52 (3/8")
C Ø9.52 (3/8")
Ø6.35 (1/4")
Ø9.52 (3/8") Ø9.52 (3/8")
B Ø9.52 (3/8") Ø9.52 (3/8") Ø9.52 (3/8")
A Ø9.52 (3/8") Ø12.7 (1/2") Ø12.7 (1/2")
Outdoor Unit Installation
When Select a 24K Indoor Unit
Connective pipe size of an A and B system
(unit: inch)
Indoor Unit capacity
(Btu/h) Liquid Gas
Notes On Drilling Hole In Wall
NOTE:
(unit: mm/inch)
Outdoor Unit Dimensions
W x H x D
Mounting Dimensions
Distance A Distance B
Rows of series installation
The relations between H, A and L are
as follows.
NOTE
See illustration for Reference Location

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. Refrigerant Piping Connection
Outdoor Model MRC-075CS-3 MRC-100CS-4 MRC-120CS-5
Minimum Field Pipe Length
(m) 333
Maximum length for all rooms
(m) 60 80 80
Maximum length for one indoor unit
(m) 30 35 35
Maximum Vertical
(m) 15 15 15
Liquid Pipe
mm (inch) 3 x 6.35 (1/4) 4 x 6.35 (1/4) 4 x 6.35 (1/4)
Gas Pipe
mm (inch) 3x 9.52 (3/8) 3 x 9.52 (3/8) + 1 x 12.7 (1/2) 3 x 9.52 (3/8) + 1 x 12.7 (1/2)
NOTE
Ensure that the length of the refrigerant pipe, the number of bends, and the drop height between the indoor and outdoor
units meets the requirements shown in above table.
Refrigerant Piping Connection Instructions:
1. Cut the connecting pipes according to required length.
2. Remove burrs in the pipe. Burrs can affect the air-tight seal of refrigerant piping connections.
3. Place flare nuts on both ends of pipe. Flare each end of connecting pipes.
Copper
pipe
Refrigerant Piping
Connection
do not
CAUTION
DO NOT
Connection Instructions –
Refrigerant Piping
DO NOT DEFORM PIPE
WHILE CUTTING
NOTE:
Flare nut
4. Connect the pipe to indoor and outdoor unit. Apply a thin coat of refrigeration oil to the flared end of the pipe.
Tighten the flare nuts using a spanner and torque wrench.
Unit tubing Flare nut Pipe
PIPING EXTENSION BEYOND FLARE FORM
Pipe
gauge
Tightening
torque
Flare dimension (A)
(Unit: mm/Inch)
Flare shape
Min. Max .
NOTE:
CAUTION
Refrigerant Piping
Connection

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Installation and Commissioning Guide Multi Split System
Pipe Flare Dimension and Tightening Torque Guide
Pipe
Size
Tightening
Torque
Flare
Dimension (A) Flare Shape
Min
(mm)
Max
(mm)
Ø 6.35 18 - 20 Nm 8.3 8.7
Ø 9.5 2 32 - 39 Nm 13.2 13.5
Ø 12.7 49 - 59 Nm 16.2 16.5
Ø 15.88 57 - 71 Nm 19. 2 19. 7
CAUTION
• Ensure to wrap insulation around the piping. Direct contact with the bare piping may result in burns or frostbite.
• Make sure the pipe is properly connected. Over tightening may damage the bell mouth and under tightening may lead
to leakage.
Instructions for Connecting Piping to Outdoor Unit
NOTE
Installation of this unit should be in accordance with Electrical Safety Standard, AS/NZS 60335.2.40.
If the smallest room to be conditioned is less than the required minimum room area (Amin), additional safety provision
maybe needed such as leak detector sensor and/or ventilation to comply, for more details refer to Annex GG and Annex HH
of the above standard.
Refer to R-32 Safety Manual for minimum required area of installation.
1. Unscrew the valve cover on the side of the outdoor unit.
Valve Cover
2. Remove protective caps from ends of valves.

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Installation and Commissioning Guide Multi Split System
3. Align flared pipe end with each valve, and tighten the flare nut as tightly as possible by hand.
4. Using a spanner, grip the body of the valve. Do not grip the nut that seals the service valve.
NOTE
USE SPANNER TO GRIP MAIN BODY OF VALVE. Torque from tightening the flare nut can snap off other parts of valve.
5. While firmly gripping the body of the valve, use a torque wrench to tighten the flare nut according to
the correct torque values.
6. Loosen the flaring nut slightly, then tighten again.
7. Repeat Steps 4 to 7 for the remaining pipe.
8. Fill out the "Total Installed Refrigerant Charge" label located on the plastic valve cover.
1=Kg
2=Kg
2=Kg 1+
1
2Additional/Reclaimed Charge
Total Installed Refrigerant Charge
Pre-Charge Amount
NOTE
The Pre-Charge Amount is written on the Rating Label of the Outdoor unit. Where adjustment to charge is required to
complete the refrigerating system, the installer should note the resulting "Additional/Reclaimed Charge" and "Total
Installed Refrigerant Charge" on the label located in the outer part of the valve cover of the Outdoor unit and "Start Up and
Commissioning Report" of R-32 Safety Manual.

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Installation and Commissioning Guide Multi Split System
9. Mount the Valve cover back.
Total Installed Refrigerant
Charge Label
CAUTION
If the indoor unit is installed at a higher position than the outdoor unit , there is chance that oil may flow into the
compressor. This may cause liquid compression or deterioration of oil return. Use oil traps in the gas piping to prevent this.
An oil trap should be installed every 10m in the vertical suction line riser.
Oil Trap
Gas Piping
Indoor Unit
Liquid
Piping
Outdoor Unit
10m
10m

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Installation and Commissioning Guide Multi Split System
CAUTION
If the outdoor unit is installed at a higher position than the indoor unit , it is recommended that the vertical suction risers not
be upsized. Proper oil return to the compressor should be maintained with suction gas velocity. If velocities drop below 7.62
m/s, oil return will be decreased. An oil trap should be installed every 6m of vertical suction line riser.
Oil Trap
Gas Piping
Outdoor Unit
Indoor Unit
Liquid
Piping
6m
6m