Samsung AJ RBLDEG Series User manual

Air conditioner
Installation manual
AJ***RBLDEG / AJ052RBMDEG
•Thank you for purchasing this Samsung air conditioner.
•Before operating this unit, please read this manual carefully and retain it for future
reference.
DB68-08149A-00

2English
Contents
Safety Information 3
Installation Procedure 5
Step 1 Checking and preparing accessories
Step 2 Choosing the installation location
Step 3 Optional: Insulating the body of the indoor unit
Step 4 Installing the indoor unit
Step 5 Purging inert gas from the indoor unit
Step 6 Cutting and flaring the pipes
Step 7 Connecting the assembly pipes to the refrigerant pipes
Step 8 Performing the gas leak test
Step 9 Insulating the refrigerant pipes
Step 10 Installing the drain hose and drain pipe
Step 11 Performing the drainage test
Step 12 Connecting the power and communication cables
Step 13 Optional: Extending the power cable
Step 14 Increasing Fan Speed
Step 15 Setting the Indoor unit addresses
Step 16 Additional Functions
Appendix 21
Troubleshooting

3English
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 for which 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
authorised centres or returned to the retailer so that
it can be disposed of correctly and safely.
• 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
Installing the unit
WARNING
IMPORTANT: When installing the unit, always remember
to connect first the refrigerant tubes, then the electrical
lines.
• Always disassemble the electric lines before the
refrigerant tubes.
• 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.
• Do not install the product in a place where
thermohygrostat is needed (such as server room,
machinery room, computer room, etc.). Those places
do not provide guaranteed operation condition of the
product therefore performance can be poor in these
places.
• Do not install the product in a ship or a vehicle
(such as a campervan). Salt, vibration or other
environmental factor may cause the product
malfunction, electric shock or fire.
• 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.
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 grounding 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 13 Optional: Extending the
power cable" in the installation manual.

5
Installation Procedure
English
CAUTION
Make sure that you earth the cables.
• Do not connect the earth wire to the gas pipe, water
pipe, lighting rod or telephone wire. If earthing is not
complete, electric shock or fire may occur.
Install the circuit breaker.
• If the circuit breaker is not installed, electric shock or
fire may occur.
Make sure that the condensed water dripping from the
drain hose runs out properly and safely.
Install the power cable and communication cable of
the indoor and outdoor unit at least 1m away from the
electric appliance.
Install the indoor unit away from lighting apparatus
using the ballast.
• If you use the wireless remote control, reception error
may occur due to the ballast of the lighting apparatus.
Do not install the air conditioner in following places.
• Place where there is mineral oil or arsenic acid. Resin
parts flame and the accessories may drop or water
may leak. The capacity of the heat exchanger may
reduce or the air conditioner may be out of order.
• The place where corrosive gas such as sulphuric acid
gas generates from the vent pipe or air outlet.
• The copper pipe or connection pipe may corrode and
refrigerant may leak.
• The place where there is a machine that generates
electromagnetic waves. The air conditioner may not
operate normally due to control system.
• The place where there is a danger of existing
combustible gas, carbon fibre or flammable dust.
• The place where thinner or gasoline is handled. Gas
may leak and it may cause fire.
Installation Procedure
Installation Procedure
Step 1 Checking and preparing
accessories
The following accessories are supplied with the indoor
unit. The type and quantity may differ, depending on the
specifications.
User manual (1) Installation manual (1)
Clamp hose (1) Flexible hose (1)
Insulation drain (1) Thermal insulation
sponge A (1)
Cable-tie (8)
Thermal insulation
sponge B (1)
Rubber (8) Thermal insulation
sponge C (1)

6
Installation Procedure
English
Installation Procedure
Step 2 Choosing the installation
location
WARNING
• Because your air conditioner contains R-32
refrigerant, 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:
Ceiling-mounted type
m (kg) A (m²)
≤ 1.842 No requirement
1.843 3.64
1.9 3.75
2.0 3.95
2.2 4.34
2.4 4.74
2.6 5.13
2.8 5.53
3.0 5.92
3.2 6.48
3.4 7.32
3.6 8.20
3.8 9.14
4.0 10.1
4.2 11.2
4.4 12.3
4.6 13.4
4.8 14.6
5.0 15.8
- 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 for wall, 2.2 m for ceiling.
General requirements for installation location
Do not install the air conditioner in a location where it
will come into contact with the following elements:
• Combustible gases
• Saline air
• Machine oil
• Sulphide gas
• Special environmental conditions
Avoid installing the air conditioner in a location with the
following conditions:
• In areas where it is exposed to direct sunlight. Close
to heat sources.
• In damp areas or locations where it could come into
contact with water. (for example rooms used for
laundry)
• In areas where curtains and furniture could affect the
supply and discharge of air.
• Without leaving the required minimum space around
the unit. (as shown in the drawing)
• In scarcely ventilated areas.
• On surfaces that are unable to support the weight
of the unit without deforming, breaking or causing
vibrations during the use of the air conditioner.
• In a position that does not enable the condensate
drainage pipe to be correctly installed. (at the end
of the installation. It is always essential to check the
efficiency of the drainage system)
• The place where animals may urinate on the product.
Ammonia may be generated.
• The place where is close to heat sources.
• 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.
Space requirements for installation
Construction Standard for Inspection Hole
1 In case, the ceiling is tex tile, Inspection hole dose not
need.
2 In case, the ceiling is plaster board, Inspection hole
depends on Inside height of the ceiing.
a Height is more than 0.5m : Only "B" [Inspection
for PBA] is applied.
b Height is less than 0.5m : Both "A"&"B" are
applied.
c "A"&"B" are inspection holes .

7
Installation Procedure
English
20mm or more
20mm or more
Unit Width(W)
Unit Depth(D)
"A"=W+100mm "B"=500mm
• You must have 20 mm or more space between the ceiling and the bottom of indoor unit. Otherwise, the noise from
the vibration of indoor unit may bother the user. When the ceiling is under construction, the hole for check-up
must be made to take service, clean and repair the unit.
• It is possible to install the unit at an height of between 2.2~2.5 m from the ground, if the unit has a duct with a
well defined lenght (300 mm or more), to avoid fan motor blower contact.
• If you install the cassette or duct type indoor unit on the ceiling with humidity over 80%, you must apply extra 10
mm of polyethylene foam or other insulation with similar material on the body of the indoor unit.

8
Installation Procedure
Installation Procedure
English
Drawing of the indoor unit
AJ026RBLDEG / AJ035RBLDEG (Unit: mm)
No. Name Description
1Liquid pipe connection ø6.35
2Gas pipe connection ø9.52
3Hose connection
4Hose connection
5Power supply/Communicaion connection
6Power supply connection
7Air discharge grille flange
8Air inlet grille flange M8~M10
938.4
8100=800
860
774
006
82
82
90022-ø3.2
246
182
333
25DO
5.03
991
6.151
81
001
5.511
5.541
11.9
17 001 01
3256=768
650
900
1000 500
(Air outlet duct flange)
(Suspension position)
(Suspension position)
Discharge side Suction side
hole
(Air around)

9
Installation Procedure
English
AJ052RBMDEG (Unit: mm)
No. Name Description
1Liquid pipe connection ø6.35
2Gas pipe connection ø12.7
3Drain pipe connection OD25 ID20(without drain pump)
4Drain pipe connection Using drain pump (Optional)
5Power supply connection
6Air discharge flange
7Air filter
8 Hook M8~M10
76
132
139
480
397
260
185
90
936
900
844
135x5=675
12
77
117
687
5 4 3
2
1
530
900 1000500
(Suspension position)
(Air outlet duct flange)
(Suspension position)
Discharge side Suction side

10
Installation Procedure
Installation Procedure
English
CAUTION
• Comply with the length and height limits described in
the figure above.
• For the product that uses the R-32 refrigerant, Install
the indoor unit on the wall 2.2 m or higher from the
floor.
Step 3 Optional: Insulating the body
of the indoor unit
A
D
B
C
Thickness: more than 10mm
Indoor
Unit
AJ026RBLDEG
AJ035RBLDEG AJ052RBMDEG
900 X 600 X 199 900 X 480 X 260
A900 X 600 900 X 480
B900 X 600 900 X 480
C600 X 199 480 X 260
D600 X 199 480 X 260
Front/
Back
Insulate the front and back side in proper size at
the same time when insulating the suction duct
and discharge duct.
(Unit: mm)
NOTE
• Insulate the end of the pipe and some curved area by
using separate insulator.
• Insulate the discharge and suction part at the same
time when you insulate connection duct.
Step 4 Installing the indoor unit
When deciding on the location of the air conditioner
with the owner, the following restrictions must be taken
into account
1 Place the pattern sheet on the ceiling at the spot where
you want to install the indoor unit.
NOTE
• Since the diagram is made of paper, it may shrink or
stretch slightly due to temperature or humidity. For
this reason, before drilling the holes maintain the
correct dimensions between the markings.
2 Insert bolt anchors. Use existing ceiling supports or
construct a suitable support as shown in figure.
3 Install the suspension bolts depending on the ceiling type.
CAUTION
• Ensure that the ceiling is strong enough to support the
weight of the indoor unit. Before hanging the unit, test
the strength of each attached suspension bolt.
Ceiling support
Hole in anchor
Hole in plug
Suspension bolt (M8) - field supply
Concrete
Insert

11
Installation Procedure
English
• If the length of suspension bolt is more than 1.5m,
it is required to prevent vibration.
• If this is not possible, create an opening on the false
ceiling in order to be able to use it to perform the
required operations on the indoor unit.
4 Screw eight nuts to the suspension bolts making space
for hanging the indoor unit.
NOTE
• You must install all the suspension rods.
5 Hang the indoor unit to the suspension bolts between
two nuts.
1
2
2
CAUTION
• Piping must be laid and connected inside the
ceiling when suspending the unit. If the ceiling is
already constructed, lay the piping into position for
connection to the unit before placing the unit inside
the ceiling.
6 Screw the nuts to suspend the unit.
7 Adjust level of the unit by using measurement plate for
all 4 sides.
CAUTION
• For proper drainage of condensate, give a 3mm slant
to the left or right side of the unit which will be
connected with the drain hose, as shown in the figure.
Make a tilt when you wish to install the drain pump,
too.
3mm
• When installing the indoor unit, make sure it is not
tilted toward front or b ack side.
CAUTION
• Noise will increase 3~6 dB(A) when the air flow
enters from the bottom side (Only for Slim Duct Type
product).
Air Flow
When the drain hose is installed to the right.
Drain hose port

12
Installation Procedure
Installation Procedure
English
Step 5 Purging inert gas from the
indoor unit
From factory the unit is supplied and set with a pre-
charge of nitrogen gas. (inert gas) Therefore, all inert gas
must be purged before connecting the assembly piping.
Unscrew the pinch pipe at the end of each refrigerant pipe.
Result : All inert gas escapes from the indoor unit.
Gas
refrigerant port
Liquid
refrigerant port
NOTE
• The designs and shape are subject to change
according to the model.
• To prevent dirt or foreign objects from getting into
the pipes during installation, do NOT remove the
pinch pipe completely until you are ready to connect
the piping.
CAUTION
• Connect the indoor and outdoor units using pipes with
flared connections(not supplied). For the lines, use
insulated, unwelded, degreased and deoxidized copper
pipe (Cu DHP type to ISO 1337 or UNI EN 12735-1),
suitable for operating pressures of at least 4200kPa and
for a burst pressure of at least 20700kPa. Copper pipe
for hydro-sanitary applications is completely unsuitable.
• For sizing and limits (height difference, line length,
max. bends, refrigerant charge, etc.) see the outdoor
unit installation manual.
• All refrigerant connection must be accessible, in order to
permit either unit maintenance or removing it completely.
Step 6 Cutting and flaring 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°
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
90° ±2°
R 0.4 to 0.8 mm
D
L
45° ±2°
Outer Diameter (D) Depth (A) Flare dimension (L)
Ø6.35 mm 1.3 mm
8.7~9.1 mm
Ø9.52 mm 1.8 mm
12.8~13.2 mm
Ø12.70 mm 2.0 mm
16.2~16.6 mm
Ø15.88 mm 2.2 mm
19.3~19.7 mm
Pipe Flare
Flare
Pipe
Pipe cutter
Oblique Rough Burr

13
Installation Procedure
English
5 Check that the flaring is correct, referring to the
illustrations below for examples of incorrect flaring.
CAUTION
• If the pipes require brazing ensure that OFN (Oxygen
Free Nitrogen) is flowing through the system.
• Nitrogen blowing pressure range is 0.02 ~ 0.05MPa.
Step 7 Connecting the assembly
pipes to the refrigerant pipes
There are two refrigerant pipes of different diameters :
• A smaller one for the liquid refrigerant
• A larger one for the gas refrigerant
• The inside of copper pipe must be clean & has no dust
1 Remove the pinch pipe on the pipes and connect the
assembly pipes to each pipe, tightening the nuts, first
manually and then with a torque wrench, a spanner
applying the following torque.
Outer diameter (D) Torque (N•m)
Ø6.35 mm 14 ~ 18
Ø9.52 mm 34 ~ 42
Ø12.70 mm 49 ~ 61
Ø15.88 mm 68 ~ 82
NOTE
• If the pipes must be shortened refer to page 12,
Step 6 Cutting and flaring the pipes
2 Be sure to use insulator which is thick enough to cover
the refrigerant tube to protect the condensate water
on the outside of pipe falling onto the floor and the
efficiency of the unit will be better.
3 Cut off any excess foam insulation.
4 Be sure that there must be no crack or wave on the
bended area.
5 It would be necessary to double the insulation
thickness(10mm or more) to prevent condensation even
on the insulator when if the installed area is warm and
humid.
6 Do not use joints or extensions for the pipes that
connect the indoor and outdoor unit. The only permitted
connections are those for which the units are designed.
Gas refrigerant port
Drain hose
connection port
Liquid refrigerant port
NOTE
• The designs and shape are subject to change
according to the model.
Refrigerant oil
Torque wrench Spanner
Flare nut Union
Correct Inclined Damaged
Surface Cracked Uneven
Thickness

14
Installation Procedure
Installation Procedure
English
Step 8 Performing the gas leak test
To identify potential gas leaks on the indoor unit, inspect
the connection area of each refrigerant pipe using a leak
detector for R-410A.
Before recreating the vacuum and recirculating the
refrigerant gas, pressurize the whole system with
nitrogen (using a cylinder with a pressure reducer) at a
pressure above 4 MPa in order to immediately detect
leaks on the refrigerant fittings.
Made vacuum for 15 minutes and pressurizing system
with nitrogen.
Insulator
Gas side
Liquid side
Step 9 Insulating the refrigerant pipes
Once you have checked that there are no leaks in the
system, you can insulate the piping and hose.
1 To avoid condensation problems, place Acrylonitrile
Butadien Rubber separately around each refrigerant pipe.
NOTE
• Always make the seam of pipes face upwards.
2 Wind insulating tape around the pipes and drain hose
avoiding compressing the insulation too much.
CAUTION
• Be sure to wrap insulation tightly without any gaps.
3 Finish wrapping insulating tape around the rest of the
pipes leading to the outdoor unit.
4 The pipes and electrical cables connecting the indoor
unit with the outdoor unit must be fixed to the wall with
suitable ducts.
CAUTION
• Make sure that all refrigerant connection must be
accessible for easy maintenance and detachment.
• Install the insulation not to get wider and use the
adhesives on the connection part of it to prevent
moisture from entering.
• Wind the refrigerant pipe with insulation tape if it is
exposed to outside sunlight.
• Install the refrigerant pipe respecting that the
insulation does not get thinner on the bent part or
hanger of pipe.
• Add the additional insulation if the insulation plate
gets thinner.
a x 3
a
Additional insulation
Refrigerant pipe
insulation
Hanger
Indoor unit
Insulation cover pipe
Insulation pipe
Be sure to overlap the insulation.
No gap
NBR

15
Installation Procedure
English
Refrigerant pipe
insulation
Be sure to overlap the insulation.
5 Select the insulation of the refrigerant pipe.
• Insulate the gas side and liquid side pipe, noting the
insulation thickness that must differ according to the
pipe size.
• Standard: Less than an indoor temperature of 30°C,
with humidity at 85%. If installing in a high humidity
environment, use one grade thicker insulator by
referring to the table below. If installing in an
unfavourable environment, use thicker one.
• The heat-resistance temperature of the insulator must
be more than 120°C.
Pipe Pipe size
Insulation type
(heating/cooling)
Remarks
Standard
(Less than
30°C, 85%)
High humidity
(Over 30°C,
85%)
EPDM, NBR
Liquid
pipe
Ø6.35 to
Ø9.52 9t 9t
The internal
temperature
is higher than
120°C.
Ø12.7 to
Ø15.88 13t 13t
Gas
pipe
Ø6.35 13t 19t
Ø9.52
19t 25tØ12.70
Ø15.88
• When installing insulation in the places and
conditions below, use the same insulation that is used
for high humidity conditions.
<Geological condition>
High humidity locations such as shorelines, hot springs,
lake or riversides, and ridges (when part of the building is
covered by earth and sand)
<Operation purpose condition>
Restaurant ceiling, sauna, swimming pool etc.
<Building construction condition>
Ceilings frequently exposed to moisture and cooling are
not covered. For example, pipes installed at a corridor of a
dormitory and studio or near an exit that opens and closes
frequently.
Places (where the pipes are installed) that are highly humid
due to a lack of ventilation.
Step 10 Installing the drain hose and
drain pipe
1 Push the supplied drain hose as far as possible over the
drain socket.
2 Tighten the metal clamp as shown in the picture.
3 Wrap the supplied large sealing pad over the metal
clamp and drain hose to insulate and fix it with clamps.
4 Insulate the complete drain piping inside the building
(field supply).
If the drain hose cannot be sufficiently set on a slope, fit
the hose with drain raising piping (field supply).
5 Push the drain hose up to insulation when connecting
the drain hose to drain socket.
Metal clamp Drain socket
Drain hose
Be sure to bond the drain
hose and the main pipe.
Drain pipe
Large seailng pad
Drain hose
PVC Tube Joint
+ VP25 (OD: 32 mm, ID: 25 mm)
Drain pipe

16
Installation Procedure
Installation Procedure
English
Without the drain pump
1 Install horizontal drainpipe with a slope of 1/100 or
more and fix it by hanger space of 1.0~1.5m.
1 Install U-trap at the end of the drainpipe to prevent a
nasty smell to reach the indoor unit.
2 Do not install the drainpipe to upward position. It may
cause water flow back to the unit.
1~1.5m
Horizontal drainpipe
more than 1/100 slope
Ceiling
Hanger
Flexible hose
With the drain pump
1 The drain pipe should be installed within 300mm to
550mm from the flexible hose and then lift down 20mm
or more.
2 Install horizontal drainpipe with a slope of 1/100 or
more and fix it by hanger space of 1.0~1.5m.
3 Install the air vent in the horizontal drainpipe to prevent
water flow back to the indoor unit.
NOTE
• You may not need to install it if there were proper
slope in the horizontal drainpipe.
4 The flexible hose should not be installed upward
position, it may cause water flow back to the indoor unit.
1~1.5m
20mm
or more
200mm
or more
Hanger
Within
300~550mm
Air vent
300mm or less
Flexible hose Horizontal drainpipe
more than 1/100 slope
Ceiling
Step 11 Performing the drainage test
Prepare a little water about 2 liter.
1 Pour water into the base pan in the indoor unit as shown
in figure.
2 Confirm that the water flows out through the drain hose.
Step 12 Connecting the power and
communication cables
CAUTION
• Always remember to connect the refrigerant pipes
before performing the electric connections. When
disconnecting the system, always disconnect the electric
cables before disconnecting the refrigerant pipes.
• 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.
• Always remember to connect the air conditioner to the
grounding system before performing the electric connections.
Use a crimp ring terminal at the end of each wire.
The indoor unit is powered through the outdoor unit by
means of a H07 RN-F connection cable (or a more power
model), with insulation in synthetic rubber and a jacket
in polychloroprene (neoprene), in accordance with the
requirements specified in the standard EN 60335-2-40.
1 Remove the screw on the electrical component box and
remove the cover plate.
2 Route the connection cord through the side of the indoor
unit and connect the cable to the terminals refer to the
figure below.
3 Route the other end of the cable to the outdoor unit
through the ceiling & the hole on the wall.
4 Reassemble the electrical component box cover, carefully
tightening the screw.

17
Installation Procedure
English
1(L) 2(N)
1(L) 2(N)
Vc Vc Vw Vw F1 F2 V1 V2 F3 F4
V2
V1
1(L) 2(N)
1(L) 2(N)
Vc Vc Vw Vw F F F1 F2 V1 V2
Indoor Unit
Outdoor Unit
Indoor
Power
Terminal
Receiver &
Display Unit
(Optional)
Float Switch
Drain Pump
(Optional)
COM2
(F3, F4)
Wired Remote
Controlle
MAIN PCB
CN51 BLK
CN31 RED
CN33 BLU
CN74 YEL
Between Indoor
and Outdoor
Communication
Terminal

18
Installation Procedure
English
Installation Procedure
Indoor power supply
Power supply Max/Min(V) Indoor power cable
220 to 240V, 50 Hz ±10% 0.75 to 1.5 mm², 3 wires
Communication cable
0.75 to 1.5 mm², 2 wires
11 13 7.5 9.0
18
13.8
AC power: M4 screw Communication: M3.5 screw
Tightening torque (kgf • cm)
M3.5 8.0 to 12.0
M4 12.0 to 18.0
• 1 N·m = 10 kgf·cm
• 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)
• Since it has the external power supply, refer to the
outdoor unit installation manual for MAIN POWER.
CAUTION
• When installing the indoor unit in a computer
room or a server room, use the double shielded
communication cable (tape aluminum / polyester
braid + copper) of FROHH2R type.
Step 13 Optional: Extending the
power cable
1 Prepare a crimping tool and 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 the wire shields of the tube.
CAUTION
• For information about the power cable specifications for
indoor and outdoor units, refer to the installation manual.
• After peeling off the tube wire, you must 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)

19
Installation Procedure
English
Method 1
Connection sleeve Connection sleeve
Method 2
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.
Compression
dimension
• After compressing it, pull both sides of the wire to
make sure it is firmly pressed.
5 mm 5 mm
Method 1 Method 2
Compress it 4 times.Compress it 4 times.
5 Wrap it with the insulation tape twice or more and
position your contraction tube in the middle of the
insulation tape.
A total of three or more layers of insulation is required.
40 mm 35 mm
Method 1 Method 2
Insulation tapeInsulation tape
6 Apply heat to the contraction tube to contract it.
Contraction tube
7 After tube contraction work is completed, wrap it with
the insulation tape to finish.
Insulation tape
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.
Step 14 Increasing Fan Speed
If external static pressure is too great(due to long
extension of ducts, for example), the air flow volume
may drop too low at each air outlet. This problem can be
solved by increasing the fan speed using the following
procedure.
1 Remove the screw on the electrical component box and
remove the cover plate.
2 Adjust the DIP switch(SW05) on the main PCB to the
“OFF” position.
K1 K2 K3 K4
SW05
Switch No. Switch Position Function
K3
ON Normal speed
OFF High speed
3 Re-install the cover plate and join the removed screw.

Installation Procedure
English
External Static Pressure
External Static
Pressure (mmAq)
1.0 2.0

3.0 4.0
AJ026RBLDEG
015201-1400FB 015201-14020C 015201-140360 015201-1403A2
AJ035RBLDEG
015201-16025D 015201-16026E 015201-1603C4 015203-160108
External Static
Pressure (mmAq)
0.0 2.0 4.0  6.0
AJ052RBMDEG
012221-194247 012221-194360 012221-1943A2 012223-194105
• Mark ‘  ’ is the basic model of this product.
Refer to the table above depending on the installation
environment.
Step 15 Setting the Indoor unit
addresses
1 Before installing the indoor unit,assign an address to the
indoor unit according to the air conditioning system plan.
2 The address of the indoor unit is assigned by adjusting
MAIN(SW02) switch.
K1 K2 K3 K4 K5 K6 K7 K8 K9 K10 K11 K12
3 The MAIN address is for communication between the
indoor unit and the outdoor unit. Therefore, you must set
it to operate the air conditioner properly.
4 It is required to set the RMC address if you install the wired
remote controller and/or the centralized controller.
5 If you install optional accessories such as the wired
remote controller, centralized controller, etc. see an
appropriate installation manual.
6 If an optional accessory is not installed, you do not have
to set the RMC address. However, adjust K1 and K2
switches of the SW05 DIP switch to “ON” position in this
case.
7 Set the MAIN address by adjusting the rotary
switch(SW02) from 0 to 9. Each indoor unit connected to
the same outdoor unit must have different address.
Step 16 Additional Functions
NO. Function ON OFF
SW05
K1
External room sensor Not use Use
K2
Centralized controller Not use Use
K3
Compensate RPM Standard Up
K4
Drain Pump Not use Use
• K1 OFF
Heating mode : Setting temperature compensation
value = 0°C
Thermo OFF  Fan OFF
NO. Function ON OFF
SW06
K5
Indoor Temperature
Compensation for Heating Mode
+2°C +5°C
K6 Filter Time 1,000
hours 2,000 hours
K7 Hot Water Coil Not Use Use
K8 - - -
NO. Function ON OFF
SW07
K9 - - -
K10 - - -
K11 External control Not Use Use
K12 External Control Output Thermal ON Operation ON
SW05
SW06
SW07
Installation Procedure
20