Samsung AJ RCJ Series User manual

Airconditioner
Installation manual
AJ***RCJ*EG
Thank you for purchasing this Samsung air conditioner.
Before operating this unit, please read this manual carefully and retain it for future
reference.
DB68-08144A-02

2English
Contents
For information on Samsung’s environmental commitments and product-specific regulatory obligations, e.g. REACH,
WEEE, Batteries, visit : samsung.com/uk/aboutsamsung/samsungelectronics/corporatecitizenship/data_corner.html
Safety Information 3
General information 3
Installing the unit 4
Preparation of fire extinguisher 5
Ignition sources free 5
Area ventilation 5
Leakage detection methods 5
Labelling 6
Recovery 6
Power supply line, fuse or circuit breaker 7
Installation Procedure 7
Step 1 Choosing the installation location 7
Step 2 Checking and preparing accessories and tools 10
Step 3 Fixing the outdoor unit in place 10
Step 4 Connecting the power cables, communication cable, and controllers 11
Step 5 Optional: Extending the power cable 17
Step 6 Connecting the refrigerant pipe 19
Step 7 Optional: Cutting and flaring the pipes 20
Step 8 Connecting up and removing air in the circuit 21
Step 9 Performing the gas leak test 22
Step 10 Adding refrigerant (R-32) 23
Step 11 Connecting the drain hose to the outdoor unit 24
Step 12 Checking the earthing 25
Step 13 Setting an indoor unit address and installation option 25
Step 14 Cool and Heat modes operation test 35
Step 15 Optional: Setting to Cool or Heat only mode 35
Step 16 Optional: Power improvement mode 36
Extra procedures 37
Pumping down refrigerant 37
Relocating the indoor and outdoor units 37
Using the stop valve 38
Appendix 39
Troubleshooting 39

3
English
Safety Information
WARNING
Hazards or unsafe practices that may result in severe
personal injury or death.
CAUTION
Hazards or unsafe practices that may result in minor
personal injury or property damage.
Carefully follow the precautions listed below because they
are essential to guarantee the safety of the equipment.
WARNING
Always disconnect the air conditioner from the power
supply before servicing it or accessing its internal
components.
Verify that installation and testing operations are
performed by qualified personnel.
Verify that the air conditioner is not installed in an
easily accessible area.
General information
WARNING
Carefully read the content of this manual before
installing the air conditioner and store the manual in
a safe place in order to be able to use it as reference
after installation.
For maximum safety, installers should always carefully
read the following warnings.
Store the operation and installation manual in a safe
location and remember to hand it over to the new
owner if the air conditioner is sold or transferred.
This manual explains how to install an indoor unit with
a split system with two SAMSUNG units. The use of
other types of units with different control systems may
damage the units and invalidate the warranty. The
manufacturer shall not be responsible for damages
arising from the use of non compliant units.
The manufacturer shall not be responsible for damage
originating from unauthorized changes or the
improper connection of electric and requirements set
forth in the “Operating limits” table, included in the
manual, shall immediately invalidate the warranty.
The air conditioner should be used only for the
applications forwhich it has been designed: the indoor
unit is not suitable to be installed in areas used for
laundry.
Do not use the units if damaged. If problems occur,
switch the unit off and disconnect it from the power
supply.
In order to prevent electric shocks, fires or injuries,
always stop the unit, disable the protection switch
and contact SAMSUNG’s technical support if the unit
produces smoke, if the power cable is hot or damaged
or if the unit is very noisy.
Always remember to inspect the unit, electric
connections, refrigerant tubes and protections
regularly. These operations should be performed by
qualified personnel only.
The unit contains moving parts, which should always
be kept out of the reach of children.
Do not attempt to repair, move, alter or reinstall the
unit. If performed by unauthorized personnel, these
operations may cause electric shocks or fires.
Do not place containers with liquids or other objects
on the unit.
All the materials used for the manufacture and
packaging of the air conditioner are recyclable.
The packing material and exhaust batteries of the
remote controller(optional) must be disposed of in
accordance with current laws.
The air conditioner contains a refrigerant that has
to be disposed of as special waste. At the end of its
life cycle, the air conditioner must be disposed of in
authorized centres or returned to the retailer so that it
can be disposed of correctly and safely.
This appliance 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 appliance by a
person responsible for their safety. Children should be
supervised to ensure that they do not play with the
appliance.
Do not use means to accelerate the defrost operation
or to clean, other than those recommended by
Samsung.
Do not pierce or burn.
Be aware that refrigerants may not contain an odour.
Safety Information
Safety Information

4English
Safety Information
Safety Information
For use in Europe: This appliance 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
appliance 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.
Installing the unit
WARNING
IMPORTANT: When installing the unit, always remember
to connect first the refrigerant tubes, then the electrical
lines.
Upon receipt, inspect the product to verify that
it has not been damaged during transport. If the
product appears damaged, DO NOT INSTALL it and
immediately report the damage to the carrier or
retailer (if the installer or the authorized technician has
collected the material from the retailer.)
After completing the installation, always carry out a
functional test and provide the instructions on how to
operate the air conditioner to the user.
Do not use the air conditioner in environments with
hazardous substances or close to equipment that
release free flames to avoid the occurrence of fires,
explosions or injuries.
Our units should be installed in compliance with the
spaces shown in the installation manual, to ensure
accessibility from both sides and allow repairs or
maintenance operations to be carried out. The
unit’s components should be accessible and easy to
disassemble without endangering people and objects.
For this reason, when provisions of the installation
manual are not complied with, the cost required to
access and repair the units (in SAFETY CONDITIONS,
as set out in prevailing regulations) with harnesses,
ladders, scaffolding or any other elevation system will
NOT be considered part of the warranty and will be
charged to the end customer.
While in installation or relocation of the product, do
not mix the refrigerant with other gases including air
or unspecified refrigerant. Failure to do so may cause
pressure increase to result in rupture or injury.
Do not cut or burn the refrigerant container or pipings.
Use clean parts such as manifold gauge, vacuum
pump, and charging hose for the refrigerant.
Installation must be carried out by qualified personnel
for handling the refrigerant. Additionally, reference the
regulations and laws.
Be careful not to let foreign substances (lubricating
oil, refrigerant other than R32, water, etc.) enter the
pipings.
When mechanical ventilation is required, ventilation
openings shall be kept clear of obstruction.
For disposal of the product, follow the local laws and
regulations.
Do not work in a confined place.
The work area shall be blocked.
The refrigerant pipings shall be installed in the
position where there are no substances that may
result in corrosion.
The following checks shall be performed for
installation:
The ventilation devices and outlets are operating
normally and are not obstructed.
Markings and signs on the equipment shall be
visible and legible.
Upon leakage of the refrigerant, ventilate the room.
When the leaked refrigerant is exposed to flame, it
may cause generation of toxic gases.
Make sure that the work area is safe from flammable
substances.
To purge air in the refrigerant, be sure to use a vacuum
pump.
Note that the refrigerant has no odour.
The units are not explosion proof so they must be
installed with no risk of explosion.
This product contains fluorinated gases that
contribute to global greenhouse effect. Accordingly, do
not vent gases into the atmosphere.
For installation with handling the refrigerant(R-32),
use dedicated tools and piping materials.

5
English
Safety Information
Servicing and installation shall be performed as
recommended by the manufacturer. In case other
skilled persons are joined for servicing, it shall be
carried out under supervision of the person who is
competent in handling flammable refrigerants.
For servicing the units containing flammable
refrigerants, safety checks are required to minimise
the risk of ignition.
Servicing shall be performed following the controlled
procedure to minimize the risk of flammable
refrigerant or gases.
Do not install where there is a risk of combustible gas
leakage.
Do not place heat sources.
Be cautious not to generate a spark as follows:
Do not remove the fuses with power on.
Do not disconnect the power plug from the wall
outlet with power on.
It is recommended to locate the outlet in a high
position. Place the cords so that they are not
tangled.
If the indoor unit is not R-32 compatible, an error
signal appears and the unit will not operate.
After installation, check for leakage. Toxic gas may be
generated and if it comes into contact with an ignition
source such as fan heater, stove, and cooker. cylinders,
make sure that only the refrigerant recovery cylinders
are used.
Never directly touch any accidental leaking refrigerant.
This could result in severe wounds caused by frostbite.
Preparation of fire extinguisher
If a hot work is to be done, an appropriate fire
extinguishing equipment should have been available.
A dry powder or CO
2
fire extinguisher shall be
equipped near the charging area.
Ignition sources free
Make sure to store the units in a place without
continuously operating ignition sources (for example,
open flames, an operating gas appliance or an
operating electric heater).
The service engineers shall not use any ignition
sources with the risk of fire or explosion.
Potential ignition sources shall be kept away from
the work area where the flammable refrigerant can
possibly be released to the surrounding.
The work area should be checked to ensure that there
are no flammable hazards or ignition risks. The “No
Smoking” sign shall be attached.
Under no circumstances shall potential sources of
ignition be used while in detection of leakage.
Make sure that the seals or sealing materials have not
degraded.
Safe parts are the ones with which the worker can
work in a flammable atmosphere. Other parts may
result in ignition due to leakage.
Replace components only with parts specified by
Samsung. Other parts may result in the ignition of
refrigerant in the atmosphere from a leak.
Area ventilation
Make sure that the work area is well ventilated before
performing a hot work.
Ventilation shall be made even during the work.
The ventilation should safely disperse any released
gases and preferably expel them into the atmosphere.
Ventilation shall be made even during the work.
Leakage detection methods
The leakage detector shall be calibrated in a
refrigerant-free area.
Make sure that the detector is not a potential source
of ignition.
The leakage detector shall be set to the LFL (lower
flammability limit).
The use of detergents containing chlorine shall be
avoided for cleaning because the chlorine may react
with the refrigerant and corrode the pipings.
If leakage is suspected, naked flames shall be
removed.

6
Safety Information
English
Safety Information
If a leakage is found while in brazing, the entire
refrigerant shall be recovered from the product or
isolated (e.g. using shut-off valves). It shall not be
directly released to the environment. Oxygen free
nitrogen (OFN) shall be used for purging the system
before and during the brazing process.
The work area shall be checked with an appropriate
refrigerant detector before and during work.
Ensure that the leakage detector is appropriate for use
with flammable refrigerants.
Labelling
The parts shall be labelled to ensure that they have
been decommissioned and emptied of refrigerant.
The labels shall be dated.
Make sure that the labels are affixed on the system to
notify it contains flammable refrigerant.
Recovery
When removing refrigerant from the system for
servicing or decommissioning, it is recommended to
remove the entire refrigerant.
When transferring refrigerant into cylinders, make
sure that only the refrigerant recovery cylinders are
used.
All cylinders used for the recovered refrigerant shall
be labelled.
Cylinders shall be equipped with pressure relief valves
and shut-off valves in a proper order.
The recovery system shall operate normally according
to the specified instructions and shall be suitable for
refrigerant recovery.
In addition, the calibration scales shall operate
normally.
Hoses shall be equipped with leak-free disconnect
couplings.
Before starting the recovery, check for the status of
the recovery system and sealing state. Consult with
the manufacturer if suspected.
The recovered refrigerant shall be returned to the
supplier in the correct recovery cylinders with the
Waste Transfer Note attached.
Do not mix refrigerants in the recovery units or
cylinders.
If compressors or compressor oils are to be removed,
make sure that they have been evacuated to the
acceptable level to ensure that flammable refrigerant
does not remain in the lubricant.
The evacuation process shall be performed before
sending the compressor to the suppliers.
Only the electrical heating to the compressor body is
allowed to accelerate the process.
Oil shall be drained safely from the system.
Never install a motor-driven equipment to prevent
ignition.
Empty recovery cylinders shall be evacuated and
cooled before recovery.

7
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Installation Procedure
Power supply line, fuse or circuit breaker
WARNING
Always make sure that the power supply is compliant
with current safety standards. Always install the air
conditioner in compliance with current local safety
standards.
Always verify that a suitable earthing connection is
available.
Verify that the voltage and frequency of the power
supply comply with the specifications and that the
installed power is sufficient to ensure the operation of
any other domestic appliance connected to the same
electric lines.
Always verify that the cut-off and protection switches
are suitably dimensioned.
Verify that the air conditioner is connected to the
power supply in accordance with the instructions
provided in the wiring diagram included in the manual.
Always verify that electric connections (cable entry,
section of leads, protections…) are compliant with
the electric specifications and with the instructions
provided in the wiring scheme. Always verify that all
connections comply with the standards applicable to
the installation of air conditioners.
Devices disconnected from the power supply should
be completely disconnected in the condition of
overvoltage category.
Be sure not to perform power cable modification,
extension wiring, and multiple wire connection.
It may cause electric shock or fire due to poor
connection, poor insulation, or current limit
override.
When extension wiring is required due to power
line damage, refer to "Step 5 Optional: Extending
the power cable" in the installation manual.
Step1 Choosing the installation location
Installation location requirements
The outdoor unit shall be installed in an open space
that is always ventilated.
The local gas regulations shall be observed.
For installation inside a building (this applies either to
indoor or outdoor units installed inside) a minimum
room floor area of space conditioned is mandatory
according to IEC 60335-2-40:2018 (see the reference
table into either the indoor or outdoor unit installation
manual).
To handle, purge, and dispose the refrigerant, or break
into the refrigerant circuit, the worker should have a
certificate from an industry-accredited authority.
Do not install the indoor unit in the following areas:
Area filled with minerals, splashed oil, or steam.
It will deteriorate plastic parts, causing failure or
leakage.
Area that is close to heat sources.
Area that produces substances such as sulfuric gas,
chlorine gas, acid, and alkali. It may cause corrosion
of the pipings and brazed joints.
Area that can cause leakage of combustible gas
and suspension of carbon fibers, flammable dust, or
volatile flammables.
Area where refrigerant leaks and settles.
Area where animals may urinate on the product.
Ammonia may be generated.
Do not use the indoor unit for preservation of food
items, plants, equipment, and art works. This may
cause deterioration of their quality.
Do not install the indoor unit if it has any drainage
problem.
Do not place the outdoor unit on its side or upside
down. Failing to do so may cause the compressor
lubrication oil to run into the cooling circuit and lead
to a serious damage to the unit.
Install the unit in a well-ventilated location away from
direct sunlight or strong winds.
Install the unit in a location that would not obstruct
any passageways or thoroughfares.
Install the unit in a location that would not inconvenience
or disturb your neighbors, as they could be affected by
the noise or the airflow coming from the unit.
Installation Procedure
Installation Procedure

8
Installation Procedure
English
Installation Procedure
Installation Procedure
Install the unit in a location where the pipes and the
cables can be easily connected to the indoor unit.
Install the unit on a flat, stable surface that can
withstand the weight of the unit. Otherwise, the unit
can generate noise and vibration during operation.
Install the unit so that the air flow is directed towards
the open area.
Maintain sufficient clearance around the outdoor unit,
especially from a radio, computer, stereo system, etc.
Fuse
Fuse
Control
1.5 m or more
1 m or more 1 m or more
1.5 m or more
1.5 m or more
300 mm
Stereo Computer etc Outdoor Unit
200 mm
Air Guide Duct (This product is not provided by Samsung)
Indoor Unit
Install the unit at a height where its base can be firmly
fixed in place.
Make sure that the water dripping from the drain hose
runs away correctly and safely.
CAUTION
You have just purchased a system air conditioner and it
has been installed by your installation specialist.
This device must be installed according to the national
electrical rules.
If your outdoor unit exceeds a net weight of 60 kg, do
not install it on a suspended wall, but stand it on a
floor.
When installing the outdoor unit at the seaside, make
sure that it is not directly exposed to sea breeze. If
you cannot find an adequate place free from direct
sea breeze, construct a protection wall or a protective
fence.
Install the outdoor unit in a place (such as near
buildings etc.) where it can be prevented from sea
breeze. Failure to do so may cause a damage to the
outdoor unit.
Sea breeze Sea breeze
Sea Sea
Outdoor Unit Outdoor Unit
If you cannot avoid installing the outdoor unit at the
seaside, construct a protection wall around to block
the sea breeze.
Construct a protection wall with a solid material such
as concrete to block the sea breeze. Make sure that the
height and the width of the wall are 1.5 times larger
than the size of the outdoor unit. Also, secure a space
larger than 700 mm between the protection wall and
the outdoor unit for exhausted air to ventilate.
Protection wall
Outdoor Unit
Sea breeze
Sea
CAUTION
Depending on the condition of power supply, unstable
power or voltage may cause malfunction of the parts
or control system. (At the ship or places using power
supply from electric generator...etc)
Install the unit in a place where water can drain
smoothly.
If you have any difficulty finding installation location
as prescribed above, contact your manufacturer for
details.
Be sure to clean the sea water and the dust on the
heat exchanger of the outdoor unit and apply a
corrosion inhibitor on it. (At least once in a year.)

9
English
Installation Procedure
Minimum clearances for the outdoor unit
When installing 1 outdoor unit
(Unit: mm)
300 or more
1500 or more
300 or
more
600 or
more
300 or
more
2000 or
more
1500 or more
600 or
more
300
or more
1500 or more
300 or
more
When installing more than 1 outdoor unit
(Unit: mm)
1500
or more
600
or more
3000
or more
3000
or more
300
or more
600
or more 600 or more
1500 or
more 300
or more
1500 or more
600
or more 600 or more
300
or more
600
or more
600
or more
600
or more
300
or more
300 or more
300 or more
500 or more 500 or more
CAUTION
The outdoor unit must be installed according to the
specified distances in order to permit accessibility
from each side, to guarantee correct operation,
maintenance, and repair of the unit.
The components of the outdoor unit must be
reachable and removable under safe conditions for
people and the unit.

10
Installation Procedure
English
Installation Procedure
Step 2 Checking and preparing
accessories and tools
3-wire
Power Cable (option)
2-wire
Assembly Cable (option)
Drain Plug Energy Label
Rubber Leg Installation Manual
Flare Bolt
(Nut 12.70mm;Bolt
9.52mm)
Flare Nuts, 9.52mm
outer pipe diameter
Flare Nuts, 15.88mm
outer pipe diameter
(AJ080RCJ4EG)
Flare Bolt
(Nut 12.70mm; Bolt
15.88mm)(AJ080RCJ4EG)
Drain Cap
NOTE
Attach Energy Label to the outdoor unit properly when
installing.
Wire assembly cables are optional. If they are not
supplied, use standard cables.
The drain plug and the rubber legs are included only
when the air conditioner is supplied without assembly
pipes.
If these accessories are supplied, they are in the
accessory package or outdoor unit package.
Step 3 Fixing the outdoor unit in place
Install the outdoor unit on a rigid and stable base to
prevent disturbance from any noise caused by vibration.
When installing the unit at a height or in a location
exposed to strong winds, fix the unit securely to a support
(i.e., a wall or a ground).
1 Position the outdoor unit so that the air flow is directed
towards the outside, as indicated by the arrows on the
top of the unit.
2 Attach the outdoor unit to the appropriate support
using anchor bolts.
The earthing wire for the telephone line cannot be
used to earth the air conditioner.
3 If the outdoor unit is exposed to strong winds, install
shield plates around the outdoor unit, so that the fan
can operate correctly.
NOTE
Certainly fix up its rubber leg in order to prevent its
vibration and noise.
X
Y
(Unit : mm)
Model X Y
AJ052/068RCJ3EG
AJ080RCJ4EG 660 340
CAUTION
Install a drain outlet at the lowest end around the base
for outdoor unit drainage
When installing the outdoor unit on the roof,
waterproof the unit and check the ceiling strength.
Rubber leg

11
English
Installation Procedure
Optional: Fixing the outdoor unit to a wall with
a rack
Soft rubber designed to cut off vibration from
rack to wall. (not supplied with product)
Designed to cut off residual vibration from
outdoor unit to rack. (not supplied with product)
Anchor bolt
Base surface
20 mm
Install a proper grommet in order to reduce noise
and residual vibration transferred by the outdoor unit
towards the wall.
CAUTION
When installing an air guide duct, be sure to check the
following:
The screws do not damage the copper pipe.
The air guide duct is fixed firmly on the guard fan.
Step 4 Connecting the power cables,
communication cable, and controllers
You must connect the following three electrical cables to
the outdoor unit:
The main power cable between the auxiliary circuit
breaker and the outdoor unit.
The outdoor-to-indoor power cable between the
outdoor unit and the indoor unit.
The communication cable between the outdoor unit
and the indoor unit.
CAUTION
During installation, make first the refrigerant
connections and then the electrical connections. If the
unit is uninstalled, first disconnect the electrical cables
and then the refrigerant connections.
Connect the air conditioner to the earthing system
before making the electrical connections.
NOTE
Especially, if your outdoor unit is the one designed for
Russian and European markets, consult the supply
authority, if necessary, to estimate and reduce the
supply system impedance before installation.
CAUTION
For the product that uses the R-32 refrigerant, be
cautious not to generate a spark by keeping the
following requirements:
Do not remove the fuses with power on.
Do not disconnect the power plug from the wall
outlet with power on.
It is recommended to locate the outlet in a high
position. Place the cords so that they are not
tangled.

12
Installation Procedure
English
Installation Procedure
Conncting the cables to the outdoor unit
AJ052/068RCJ3EG
L N
1(L) 2(N) F1 F21(L) 2(N) F1 F2
1(L) 2(N) F1 F2
12
F1 F2
F1 F2
F1 F2
F1 F2
12
21
12
F1 F2
F1 F2
1 2
12
B
CB CB C
A
1 2
1(L) 2(N) 1(L) 2(N)
F1 F2 F1 F2
A-unit B-unit C-unit
Indoor unit
Assembly cable
Earth
terminal
Outdoor unit
Main Power
Supply cable
Power cable to indoor units
Communication cable
to indoor units
A
B
C
Cable Type : A
Cable Type : B
Cable Type : C
Earth
terminal
Earth
terminal
Earth
terminal
Earth
terminal
Earth
terminal
Earth
terminal
AJ080RCJ4EG
F1 F2 F1 F2
L N
1(L) 2(N) F1 F2 1(L) 2(N) F1 1(L) 2(N) F1 1(L) 2(N) F1F2
12
1 2
F1 F2 F1 F2
12
21
F2
12
F1 F2
F1 F2
F2
F1 F2
F1 F2
12
21 1 2
12
B
C B CB C B C
A
1(L) 2(N) 1(L) 2(N)
F1 F2 F1 F2
A-unit B-unit C-unit D-unit
Indoor unit
Assembly cable
Earth
terminal
Earth
terminal
Outdoor unit
Main Power
Supply cable
Power cable to indoor units
Communication cable
to indoor units
A
B
C
Cable Type : A
Cable Type : B
Cable Type : C
Earth
terminal
Earth
terminal
Earth
terminal
Earth
terminal
Earth
terminal
Earth
terminal
Earth
terminal

13
English
Installation Procedure
Specification for circuit breaker and power supply cord
Power supply cord is not supplied with air conditioner.
Select the power supply cord in accordance with relevant local and national regulations.
Wire size must comply with the applicable local and national code.
Specifications for local wiring power supply cord and branch wiring are in compliance with local cord.
NOTE
1. Power Supply cords of parts of appliances for outdoor use shall not be lighter than polychloroprene sheathed
flexible cord. (Code designation IEC:60245 IEC 57 / CENELEC: H05RN-F , IEC:60245 IEC 66 / CENELEC: H07RN-F )
2. Select power supply cord based on MCA.
3. MFA is used to select the circuit breaker and the ground fault circuit interrupter (earth leakage circuit breaker).
4. MCA represents maximum input current.
5. MFA represents capacity which may accept MCA.
Abbreviations
- MCA : Min. Circuit Amps. (A)
- MFA : Max. Fuse Amps. (A )
Screw Tighten Torque(kgf.cm) Position
M4 12.0~18.0 1(L),2(L),L,N,F1,F2
Model Outdoor Units Maximum Input Current[A] Power Supply
Rated Outdoor Indoor(Max.) Total MCA MFA
Outdoor Unit Indoor Unit Hz Volts
AJ052RCJ3EG 3 Room 50 1phase,220-240 11.0 0.9 11.9 11.90 13.75
AJ068RCJ3EG 3 Room 50 1phase,220-240 16.6 0.9 1 7. 5 17.50 20.75
AJ080RCJ4EG 4 Room 50 1phase,220-240 16.6 1.2 17.8 17.80 20.75

14
Installation Procedure
English
Installation Procedure
Connect the cables to the terminal board using the compressed ring terminal.
Use rated cables only.
Connect the cables with driver and wrench that can apply the rated torque to the screws.
Make sure that appropriate tightening torque is applied for cable connection. If the terminal is loose, arc heat may
occur and cause fire and if the terminal is connected too firmly, terminal may get damaged.
Transmitter installation(option)
AJ052RCJ3EG/AJ068RCJ3EG/AJ080RCJ4EG
Accessories (Transmitter: MIM-B13D/ MIM-N01)
1. Turn the power off and take off the cover of the outdoor units.
2. Fix the case with bolts to the side of the control box referring to the figure
on the right side.
In case of FJM outdoor unit, there is not enough space to fix all parts of
transmitter. So you may use transmitter main PCB.
3. Attach the transmitter main PCB to the case, then connect F1/F2 lines,
R1/R2 lines which are upper controller communication cables and DC 12V
power cables to the interface module referring to the figure on page 15.
(Upper controller power should be off.)
4. You must check the position of dip switch on the transmitter's main PCB
and the main PCB of AJ***RBLDEG/AJ***RBMDEG/AJ***RBJDEG indoor
units. For AR**/AJ***RB1DEG/AJ***RBNDEG indoor units, refer to page
34.
5. Assemble a cover of the outdoor unit and turn the power on.
6. Check the communication status.
7. If you install a transmitter to the outdoor unit, every indoor unit which is
connected to the outdoor unit can be controlled simultaneously.
8. Each outdoor unit connected to the same centralized controller has its
own transmitter.
Transmitter
MAIN
Transmitter
SUB
485
Communication
Cable
DC Power
Cable
(12V)
DC Power
Cable
(5V)
Communication
Cable Cable Tie Case
R1 R2
R2 R1 R2 R1
R1 R2
R2 R1 R2 R1
R1 R2
R2 R1 R2 R1
R1 R2
R2 R1 R2 R1
R1 R2
R2 R1 R2 R1
R1 R2
R2 R1 R2 R1
R1 R2
R2 R1 R2 R1
R1 R2
R2 R1 R2 R1
Fix the case with hinges
(Control Box in the outdoor unit)
Transmitter
Tightening power terminal

15
English
Installation Procedure
1
ON DIP
2 3 4
R1 R2
F1 F2 F1 F2
1(L) 2(N) 1(L) 2(N)
F1 F2
DC 12V (Blue)
Transmitter MAIN PCB
Outdoor unit
HUB PCB
Terminal Block in the outdoor unit
AJ052RCJ3EG
AJ068RCJ3EG
AJ080RCJ4EG
K1 K2 K3 K4
Change DIPswitch-K2 on
AJ***RBLDEG/AJ***RBMDEG/AJ***RBJDEG
indoor units PCB
(K2 : ON to OFF). For AR**/AJ***RB1DEG/
AJ***RBNDEG
indoor units,refer to page 34.
DC 12V
supply
Check the dip switch position on transmitter main PCB
as the picture above, "turn ON"
F1 F2 F1 F2

16
Installation Procedure
English
Installation Procedure
Outdoor-to-indoor power terminal
specifications
Connect the cables to the terminal board using the
compressed ring terminal.
Cover a solderless ring terminal and a connector part
of the power cable and then connect it.
Silver solder
Norminal
dimensions
for cable
(mm²)
Norminal
dimensions
for screw
(mm)
B D d1 E F L d2 t
Standard
dimension
(mm)
Allowance
(mm)
Standard
dimension
(mm)
Allowance
(mm)
Standard
dimension
(mm)
Allowance
(mm)
Min.
(mm)
Min.
(mm)
Max.
(mm)
Standard
dimension
(mm)
Allowance
(mm)
Min.
(mm)
1.5
46.6 ±0.2 3.4 +0.3
-0.2 1.7 ±0.2 4.1 616 4.3 +0.2 00.7
4 8
2.5 46.6 ±0.2 4.2 +0.3
-0.2 2.3 ±0.2 6 6 1 7. 5 4.3 +0.2 00.8
48.5
4 4 9.5 ±0.2 5.6 +0.3
-0.2 3.4 ±0.2 6 5 20 4.3 + 0.2 00.9
Connect the rated cables only.
Connect using a driver which is able to apply the rated
torque to the screws.
If the terminal is loose, fire may occur caused by arc. If
the terminal is connected too firmly, the terminal may
be damaged.
Tightening torque (kgf • cm)
M4 12.0 to 18.0
M5 20.0 to 30.0
1N · m = 10 kgf · cm
CAUTION
When connecting cables, you can connect the cables to
the electrical part or connect them through the holes
below depending on the spot.
Connect the communication cable between the indoor
and outdoor units through a conduit to protect against
external forces, and feed the conduit through the wall
together with refrigerant piping.
Remove all burrs at the edge of the knock-out hole
and secure the cable to the outdoor knock-out using
lining and bushing with an electrical insulation such as
rubber and so on.
Must keep the cable in a protection tube.
Keep distances of 50mm or more between power cable
and communication cable.
When the cables are connected through the hole,
remove the Plate bottom.

17
English
Installation Procedure
Outdoor-to-indoor power and communication
cables specifications
Indoor power supply
Power supply Max/Min (V) Indoor power cable
 ±10% 1.5 mm² , 3 wires
Communication cable
0.75 to 1.5 mm², 2 wires
Power supply cords of parts of appliances for outdoor
use shall not be lighter than polychloroprene sheathed
flexible cord. (Code designation IEC:60245 IEC 57 /
CENELEC: H05RN-F or IEC:60245 IEC 66 / CENELEC:
H07RN-F)
When installing the indoor unit in a computer room or
net work room, server room or in the presence of risk
of disturbance to the communication cable, use the
double shielded (tape aluminium / polyester braid +
copper ) cable of FROHH2R type.
Step 5 Optional: Extending the power
cable
1 Prepare the following tools.
Tools Spec Shape
Crimping pliers MH-14
Connection sleeve
(mm)
20xØ6.5
(HxOD)
Insulation tape Width 19
mm
Contraction tube
(mm)
70xØ8.0
(LxOD)
2 As shown in the figure, peel off the shields from the
rubber and wire of the power cable.
Peel off 20 mm of cable shields from the pre-
installed tube.
CAUTION
For information about the power cable
specifications for indoor and outdoor units, refer to
the installation manual.
After peeling off cable wires from the pre-installed
tube, insert a contraction tube.
20 20
20
20
60
120
180
3 Insert both sides of core wire of the power cable into
the connection sleeve.
Method 1: Push the core wire into the sleeve from
both sides.
Method 2: Twist the wire cores together and push it
into the sleeve.
power cable
Pre-installed tube for the power cable
(Unit: mm)
(Unit: mm)

18
Installation Procedure
English
4 Using a crimping tool, compress the two points and flip
it over and compress another two points in the same
location.
The compression dimension should be 8.0
After compressing it, pull both sides of the wire to
make sure it is firmly pressed.
5 Wrap it with the insulation tape twice or more and
position your contraction tube in the middle of the
insulation tape.
Three or more layers of insulation are required.
6 Apply heat to the contraction tube to contract it.
7 After tube contraction work is completed, wrap it with
the insulation tape to finish.
CAUTION
Make sure that the connection parts are not exposed
to outside.
Be sure to use insulation tape and a contraction tube
made of approved reinforced insulating materials
that have the same level of withstand voltage with
the power cable. (Comply with the local regulations on
extensions.)
WARNING
In case of extending the electric wire, please DO NOT
use a round-shaped Pressing socket.
Incomplete wire connections can cause electric
shock or a fire.
Method 1 Method 2
Connection sleeve Connection sleeve
Compression
dimension
Method 1 Method 2
Compress it 4 times Compress it 4 times
5mm 5mm
Method 1 Method 2
Insulation tape
40mm 35mm
Insulation tape
Contraction tube
Insulation tape
Installation Procedure

19
English
Installation Procedure
Step 6 Connecting the refrigerant pipe
◆ AJ052/068RCJ3EG
1 Piping outside diameter
Indoor unit Out unit
Power
supply Ø,
V, Hz
Outside
diameter
Liquid Gas
AR07/09/12********,
AJ016/020/026
/035RB*DEG
AJ052RCJ3EG
AJ068RCJ3EG
1,220-240,
50 1/4"
3/8"
AR18********,
AJ052RB*DEG
1/2”
NOTE
 
the following indoor unit combination.
-AJ052RBNDEG/AJ052RBMDEG
 
the following indoor unit combination.
-AJ***RBJDEG
2 Piping length and the height
1 Room
max
length
3 Room
total max
length
Max height
between
indoor unit
& outdoor
unit
Max height
between
indoor units
Dimension 25m 50m 15m 7. 5 m
Composition A,B,C A+B+C (H) (h)
◆ AJ080RCJ4EG
1 Piping outside diameter
Indoor unit Out unit
Power
supply Ø,
V, Hz
Outside
diameter
Liquid Gas
AR07/09/12********,
AJ016/020/026
/035RB*DEG
AJ080RCJ4EG 1,220-240,
50 1/4"
3/8"
AR18********,
AJ052RB*DEG
1/2”
AR24******** 5/8”
NOTE
 
the following indoor unit combination.
-AJ***RBJDEG
2 Piping length and the height
1 Room
max
length
4 Room
total max
length
Max height
between
indoor
unit &
outdoor
unit
Max height
between
indoor
units
Dimension 25m 70m 15m 7. 5 m
Composition A,B,C,D A+B+C+D (H) (h)
Make at least one round:
It will reduce noise and vibration
Main power switch
AB
(h) (H)
CAB
(h) (H)
C D
Main power switch
Make at least one round:
It will reduce noise and vibration

20
Installation Procedure
English
Installation Procedure
 
make sure that it is installed, operated, and stored it
in a room whose floor area is larger than the minimum
required floor area specified in the following table:
Minimum required room area (A,m²)
m (kg) Ceiling-mounted Wall-mounted Floor-standing
≤ 1.842 No requirement
1.843 3.64 4.45 28.9
1.9 3.75 4.58 30.7
2.0 3.95 4.83 34.0
2.2 4.34 5.31 41.2
2.4 4.74 5.79 49.0
2.6 5.13 6.39 57.5
2.8 5.53 7.41 66.7
3.0 5.92 8.51 76.6
3.2 6.48 9.68 87.2
3.4 7.32 10.9 98.4
3.6 8.20 12.3 110
3.8 9.14 13.7 123
4.0 10.1 15.1 136
4.2 11.2 16.7 150
4.4 12.3 18.3 165
4.6 13.4 20.0 180
4.8 14.6 21.8 196
5.0 15.8 23.6 213
- m : Total refrigerant charge in the system
- A : Minimum required floor area
IMPORTANT: it’s mandatory to consider either the
table above or taking into consideration the local
law regarding the minimum living space of the
premises.
Minimum installation height of indoor unit is 0.6 m
for floor mounted, 1.8 m forwall, 2.2 m for ceiling.
CAUTION
3 m as minimum pipe length: It will reduce noise and
vibration.
Tighten the nuts to the specified torques.
If overtightened, the nuts could be broken so
refrigerant may leak.
Protect or enclose refrigerant tubing to avoid
mechanical damage.
NOTE
The appearance of the unit may be different from the
diagram depending on the model.
You can use the Cool and Heat modes in the following
conditions :
Model Cool Heat
Outdoor
temperature
-10 °C to 46 °C -15 °C to 24 °C
- It could take maximum 60 minutes to operate for the
protection of the compressor,if the outdoor temperature
is below -5°C.
Step 7 Optional: Cutting and aring
the pipes
1 Make sure that you have the required tools available.
(pipe cutter, reamer, flaring tool, and pipe holder)
2 If you wish to shorten the pipes, cut it with a pipe
cutter, taking care to ensure that the cut edge remains
at a 90° angle with the side of the pipe. Refer to the
illustrations below for examples of edges cut correctly
and incorrectly.
90° Oblique Rough Burr
3 To prevent any gas from leaking out, remove all burrs
at the cut edge of the pipe, using a reamer.
4 Slide a flare nut on to the pipe and modify the flare.
D
A
D
45° ±2°
90° ±2°
Pipe Flare
Flare
R 0.4 to 0.8 mm
L
Outer diameter (D) Depth (A) Flare dimension (L)
ø6.35 mm 14 to 18 8.7 to 9.1 mm
ø9.52 mm 34 to 42 12.8 to 13.2 mm
ø12.70 mm 49 to 61 16.2 to 16.6 mm
ø15.88 mm 68 to 82 19.3 to 19.7 mm
5 Check that the flaring is correct, referring to the
illustrations below for examples of incorrect flaring.