Samsung AC BNNDCH Series User manual

Air conditioner
Installation manual
AC***BNNDCH
• Thank you for purchasing this Samsung air conditioner.
• Before operating this unit, please read this manual carefully and retain it for future reference.

2English
Contents
Safety Information 3
Installation Procedure 6
Step 1 Checking and preparing accessories 6
Step 2 Choosing the installation location 6
Step 3 Optional: Insulating the body of the indoor unit 8
Step 4 Installing the indoor unit 9
Step 5 Purging inert gas from the indoor unit 10
Step 6 Cutting and flaring the pipes 10
Step 7 Connecting the assembly pipes to the refrigerant pipes 11
Step 8 Performing the gas leak test 12
Step 9 Insulating the refrigerant pipes 12
Step 10 Installing the drain hose and drain pipe 13
Step 11 Performing the drainage test 15
Step 12 Connecting the power and communication cables 16
Step 13 Optional: Extending the power cable 17
Step 14 Optional : Setting the Emergency Temperature Output (ETO) function 19
Step 15 Optional : LED Display indicator specifications when checking Wi-Fi Easy Setup and Wi-Fi status 21
Step 16 Setting the indoor unit addresses and the installation options 23
Appendix 34
Troubleshooting 34
IMPORTANT
- This product has been designed and manufactured to meet ENERǽ STAR criteria for energy efѣciency when matched with
appropriate coil components. ²oweЭer, proper refrigerant charge and proper air Ѥow are critical to achieЭe rated capacity and
efѣciency. Installation of this product should follow the manufacturerࣴs refrigerant charging and air Ѥow instructions. Failure
to conѣrm proper charge and airѤow may reduce energy efѣciency and shorten eαuipment life.

Safety Information
3
English
Safety Information
California Proposition 65 Warning (US)
WARNING
Cancer and Reproductive Harm - www P65Warnings.
ca.gov.
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 eαuipment.
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 αualified 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 reαuirements 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 SAMSUNGࣴs
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 αualified 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 liαuids 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.

Safety Information
4English
Safety Information
• 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.
• Wear protective eαuipment (such as safety
gloves, goggles, and headgear) during
installation and maintenance works.
Installation/repair technicians may be injured
if protective eαuipment is not properly
eαuipped.
• This unit is a partial unit air conditioner,
complying with partial unit reαuirements of
this International Standard, and must only
be connected to other units that have been
confirmed as complying to corresponding
partial unit reαuirements of this International
Standard.
• 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.
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 eαuipment that release free flames
to avoid the occurrence of fires, explosions or
injuries.
• Our units must be installed in compliance
with the space specifications presented in
the installation manual in order to ensure
accessibility from both sides and allow
repairs or maintenance operations to be
carried out.
The unitࣴs components must be accessible
and easy to disassemble without endangering
people and objects.
For this reason, where it is not observed as
indicated into the Installation Manual, the
cost necessary to reach and repair the unit (in
safety, as reαuired by current regulations in
force) with slings, trucks, scaffolding or any
other means of elevation wonࣴt be considered
in-warranty and charged to end user.
• If any gas or impurities, except R-410A
refrigerant, come into the refrigerant pipe,
serious problem may occur and it may cause
injury.
Use the supplied accessories, specified
components and tools for the installation.
–Do not use the pipe and the installation
product used for the R-22 refrigerant.
–Failure to use the specified components
can cause product fall down, water
leakage, electrical shock, and fire. (The
pipe and flare components used for R-22
refrigerant must not be used)

Safety Information
5
English
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 freαuency 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 reαuired due
to power line damage, refer to Step 13
Optional: Extending the power cable in the
installation manual.
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
(3.28 ft) 1 m 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.
• If the supply cord is damaged, it must be
replaced by the manufacturer, its service
agent or similarly αualified persons in order
to avoid a hazard.

6English
Installation Procedure
Installation Procedure
Step 1 Checking and preparing
accessories
The following accessories are supplied with the
indoor unit. The type and αuantity may differ,
depending on the specifications.
Pattern sheet (1) Drain hose (1)
Insulation pipe
(Liquid side1, gas side1)
Insulation drain hose
(1)
User’s
manual (1)
Installation
manual (1)
Conduit bracket (1) Reducer (1)
Clamp (1) Cable-tie (6)
Step 2 Choosing the installation
location
Installation location requirements
• There must be no obstacles near the air inlet and
outlet.
• Install the indoor unit on a ceiling that can support
its weight.
• Maintain sufficient clearance around the indoor
unit.
• Before installing the indoor unit, be sure to check
whether the chosen location is well-drained.
• The indoor unit must be installed such that it is
beyond public access and is not touchable by
users.
Do not install the air conditioner in following places.
• A location where there is mineral oil or arsenic
acid. Resin, flame, or accessories may drop or
water may leak. The heat exchanger capacity may
decrease or the air conditioner may be out of order.
• A place where corrosive gas such as sulphuric acid
gas generates from vent pipes or air outlets.
• The copper pipe or connection pipe may corrode
and refrigerant may leak.
• A place where machines may generate
electromagnetic waves. The air conditioner's
control system may not operate normally.
• 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.

7
English
Installation Procedure
Unit:inch(mm)
11.81(300)
24.41(600)
24.41(600)
22.64(575)
22.5(0.89) 22.5(0.89)
7.87(200)
12.28(312)
9.84(250)
4.72(120)
10.94(278)
22.5(0.89) 22.5(0.89)22.64(575)
6.50(165)
9.80(249)
10.59(269)
2.01(51)
5.51(140)
7.40(188) 8.15(207)
1.69(43)
19.69(500)
22.83
~23.03 (580 ~ 585)
19.69(500)
22.83
~23.03
(580
~
585)
Model AC009BNNDCH AC012BNNDCH AC018BNNDCH
Net dimension
(W × D × H) inch(mm) 22.64X22.64X9.84 (575X575X250)
Liquid pipe connection inch(mm) Ø1/4(6.35)
Gas pipe connection inch(mm) Ø3/8(9.52) Ø1/2(12.70)
Drain hose connection inch(mm) 3/4 inch [OD 1.05 inch (26.67 mm)]
(Celling opening)
(Suspension position)
(Celling opening)
(Suspension position)
Sub duct connection
The sub duct hole is not applicable to the Wind-Free models

8English
Installation Procedure
Installation Procedure
Spacing requirements
A
59.1(1500)
0.79(20)
0.67(17)
59.1(1500)
Model
AC009BNNDCH
AC012BNNDCH
AC018BNNDCH
A11.69(297)
Net dimension 22.64X9.84X22.64 (575X250X575)
Unit:inch(mm)
C
C
C
C
CAUTION
• The indoor 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 indoor unit must be reachable
and removable under safe conditions for people
and the unit.
• Do not hold the discharge air outlets, drain
connection, or refrigerant pipes while carrying the
indoor unit to avoid possible unit damage. Carry
the unit by holding the corner hanger plates.
Step 3 Optional: Insulating the body
of the indoor unit
If you install a cassette type indoor unit on the ceiling
when temperature is over 80.6 °F(27 °C) and humidity is
over 80%, you must apply an extra 0.39 inch(10 mm) thick
polyethylene insulation or a similar type of insulation to the
body of the indoor unit.
Cut away the part where pipes are pulled out for the
insulating work.
D
C
A
E
B
Insulate the end of the pipe and some curved area by using
separate insulator.
NOTE
• A: Reference for the outer circumference of the
unit (When insulating the body of the indoor unit,
use A as the reference for its outer circumference.)
ABC D E
15.75X7.48
(400X190)
15.75X7.48
(400X190)
15.75X7.48
(400X190)
15.75X7.48
(400X190)
21.65X21.65
(550X550)
Unit:inch (mm)
Obstruction
or more
Unit:inch(mm)
or more
C:59.1 inch(1500mm) or more

9
English
Installation Procedure
Step 4 Installing the indoor unit
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, be sure
to 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
• Make sure 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.
• If the length of the suspension bolt is more than 4.9 ft
(1.5 m), you are reαuired to prevent vibration.
4 Screw eight nuts and washers to the suspension bolts,
making space for hanging the indoor unit.
CAUTION
• You must install all of the suspension rods.
• It is important to leave sufficient space in the false
ceiling to allow access for maintenance or repairs to
the drainage pipe connection, the refrigerant pipe
connection, or to remove the unit if necessary.
5 Hang the indoor unit to the suspension bolts between
two nuts. Cut a pad stopper and place it on the
suspension bolts to hold the washer. Remove the
stopper and screw the nuts to fix the unit.
6 Adjust the unit to the appropriate position, taking into
account the installation area for the front panel.
• Place the pattern sheet on the indoor unit.
• Adjust the space between the ceiling and the
indoor unit by using the included dimension gauge.
• Fix the indoor unit securely after adjusting the level
of the unit by using a leveller.
• Remove the pattern sheet, connect the other
cables. and install the front panel.
Concrete
Suspension bolt (M8) - field supply
Insert
Hole in anchor
Hole in plug
Ceiling support
Pad stopper
Bracket
Indoor unit
Gauge of dimensions
Ceiling
0.91 inch (23mm)

10 English
Installation Procedure
Installation Procedure
Step 5 Purging inert gas from the
indoor unit
The indoor unit comes with nitrogen gas (inert gas)
charged at the factory. Therefore, all inert gas must be
purged before connecting the assembly piping.
Unscrew the pinch pipe at the end of each refrigerant
pipe.
NOTE
• 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.
Step 6 Cutting and flaring the pipes
1 Make sure that you have the reαuired tools available:
pipe cutter, reamer, flaring tool, and pipe holder.
2 If you wish to shorten the pipes, cut them with a pipe
cutter, ensuring that the cut edge remains at a 90°
angle to the side of the pipe. Refer to the illustrations
below for examples of edges cut correctly and
incorrectly.
90°
9
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 flare the pipe.
D
A
90° ±2°
D
L
45° ±2°
Outer Diameter (D) Depth (A) Flare dimension (L)
Ø1/4 (6.35) 0.051 (1.3) 0.34~0.36 ( 8.7~9.1 )
Ø3/8 (9.52) 0.071 (1.8) 0.50~0.52 ( 12.8~13.2 )
Ø1/2 (12.70) 0.079 (2.0) 0.64~0.65 ( 16.2~16.6 )
Ø5/8 (15.88) 0.087 (2.2) 0.76~0.78 ( 19.3~19.7 )
Unit:inch(mm)
5 Check that the flaring is correct, referring to the
illustrations below for examples of incorrect flaring.
Insulator Liαuid side
Gas side
Pipe cutter
Pipe Obliαue Rough Burr
Pipe Flare
R 0.016 to 0.032 inch
(R 0.4 to 0.8 mm)
Correct Inclined Damaged
Surface
Cracked Uneven
Thickness

11
English
Installation Procedure
Step 7 Connecting the assembly pipes to
the refrigerant pipes
There are two refrigerant pipes of different diameters :
• A smaller one for the liαuid refrigerant.
• A larger one for the gas refrigerant. The inside of
copper pipe must be clean and has no dust.
1 Remove the pinch pipes and connect the assembly
pipes. First tighten the flare nuts manually and then
with a torαue wrench and a spanner applying the
following torαue.
2
3
3
1
Outer Diameter Torque
mm inch N•m lbf.ft
Ø6.35 1/4 14 to 18 10.3 to 13.3
Ø9.52 3/8 34 to 42 25.1 to 31.0
Ø12.70 1/2 49 to 61 36.1 to 45.0
Ø15.88 5/8 68 to 82 50.2 to 60.5
(1 N•m=10 kgf•cm)
NOTE
• If the pipes must be shortened, see Step 6 Cutting
and flaring the pipes on page 10.
2 Use insulation that is thick enough to cover the
refrigerant pipe to prevent condensate water on
the outside of pipe and to ensure system efficiency.
Condensation can drip onto the floor causing property
damage or a slip hazard.
3 Cut off any excess foam insulation.
4 Make sure that the bent sections of pipe are not
kinked or cracked.
5 It is necessary to double the insulation thickness (0.39
inch or more,10 mm or more) to prevent condensation
even on the insulator when if the installed area is
warm and humid.
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 4.2MPa
and for a burst pressure of at least 20.7MPa. 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.
• If the pipes reαuire brazing, make sure that oxygen
free nitrogen (OFN) is flowing through the system.
• Nitrogen blowing pressure range is 0.02 to 0.05 MPa.
Spanner
Union
Torαue
wrench
Flare nut

12 English
Installation Procedure
Installation Procedure
Step 8 Performing the gas leak test
Pressure check the refrigerant system using high
pressure nitrogen in order to detect basic refrigerant
leaks. Before performing the vacuum process and
releasing the factory R-410A charge into the refrigerant
pipes, it is the responsibility of the installer to pressurize
the whole system with nitrogen (using a cylinder with
pressure reducer) at a pressure above 580.2 psi(4 Mpa)
(gauge).
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
5 Select the insulation of the refrigerant pipe.
• Insulate the gas side and liαuid side pipe, noting
the insulation thickness that must differ according
to the pipe size.
• Standard: Less than an indoor temperature of
86°F(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
248°F(120°C) .
Insulator Liαuid side
Gas side
No gap
NBR
Indoor unit
Insulation cover pipe
Be sure to overlap the insulation.
Insulation pipe
Additional insulation
Hanger
Refrigerant pipe
insulation

13
English
Installation Procedure
• When installing insulation in the 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 freαuently 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 freαuently.
Places (where the pipes are installed) that are highly
humid due to a lack of ventilation.
Step10 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.
A-A’
Steel ring of drain hose
Joint of drain hose
Drain hose Drain hose
Fix with Cable-Tie
Wrap thermal sleeve hose
Indoor unit
Reducer
CAUTION
Check that the indoor unit is level with the ceiling by
using the leveller.
• Install air ventilation to drain condensation smoothly.
Air ventilation
Ceiling
Pipe Pipe size
inch(mm)
Insulation type (heating/cooling)
Remarks
Standard [Less than
86°F(30°C) , 85%] High humidity [Over 86°F(30°C) , 85%]
EPDM, NBR
Liαuid
pipe
Ø1/4(6.35)
to
Ø3/8(9.52) 9 t 9 t
The internal
temperature
is higher than
248°F(120°C)
.
Ø1/2(12.70) to
Ø3/4(19.05) 13 t 13 t
Gas pipe
Ø1/4(6.35) 13 t 19 t
Ø3/8(9.52)
19 t 25 t
Ø1/2(12.70)
Ø5/8(15.88)

14 English
Installation Procedure
Installation Procedure
Main drainpipe Centralized horizontal drainpipe
(more than 1/100 slope)
• If it is necessary to increase the height of the
drain pipe, install the drain pipe straight within
11.81 inch(300mm) from the drain hose port. If it is
raised higher than 21.65 inch(550mm), there may be
water leaks.
• Do not give the hose an upward gradient beyond the
connection port. This will cause water to flow backwards
when the unit is stopped, resulting in water leaks.
• Do not apply force to the piping on the unit side when
connecting the drain hose. The hose should not be
allowed to hang loose from its connection to the unit.
Fasten the hose to a wall, frame or other support as
close to the unit as possible.
• Install horizontally.
• Max. allowable axis gap.
• Max. allowable bending angle.
30છ
NOTE
• If a concentrated drain pipe is installed, refer to the
figure below.
Drain hose
Band joint
Ceiling
0.79 inch(20mm) or more
more than 1/100 slope
11.81 inch(300mm) or less 21.65 inch(550mm) or less
Under gradient
Ceiling
Ceiling
Support pieces
more than 1/100 slope
3.28 to 4.92 ft(1 to 1.5m)
Indoor unit
Be horizontal
Flexible hose
Indoor unit
Max. 0.79 inch (20mm)
Indoor unit
Max.
Hanger
Individual
air vent
Main air vent
21.65 inch(550mm) or less
3.28 to 4.92 ft(1 to 1.5m)

15
English
Installation Procedure
Step11 Performing the drainage test
1 Do a leak test at the connection part of the flexible
hose and the drian pipe:
a Connect a general hose to the connection part of
the flexible hose of the indoor unit, and pour in
some water.
b After pouring some water, reassemble the rubber
cap on the connection part of a flexible hose of
the indoor unit and firmly tighten it with a band to
prevent leakage.
c Check the leak test at the part where the adhesive
for the flexible hose and the drian pipe is used.
CAUTION
• The leak test must be performed for at least 24
hours.
2 Check the condensed water drainage:
a Pour about 0.53 gallons(2 liters) of water into the
indoor unit drain pan as shown in the picture.
b When the electric cable connection is completed
• Turn on the indoor unit and outdoor unit.
• Operate in the Cool mode.
CAUTION
• Only in the Cool mode, you can check the correct
operation of the drain pump.
When the electric cable connection has not been
completed
• Remove the control box cover of the indoor unit.
• Connect the power supply (208~230V, 60 Hz) to the
L and N terminals.
• Reassemble the control box cover and turn on the
indoor unit.
CAUTION
• When the float switch is not detected due to
insufficient water on the drain pan, the drain
pump will not work.
• If the power supply is directly connected to the L
and N terminals, communication error message
might appear.
• After completing the drainage check, turn the
unit off and disconnect the power supply.
• Reassemble the control box cover.
c Check whether the drain pump works correctly.
d Check whether the drainage is performing
correctly at the end of the drain pipe.
e Check for leakage at the drain pipe and drain pipe
connection part.
f When leakage occurs, check whether the indoor
unit is level and check the drain hose connection
part, drainpipe connection part and drain pump
connection.
g When the drainage check is completed and
the condensed water remains on the drain pan,
remove the water.
Water leakage check part
Hose
Flexible hose

16 English
Installation Procedure
Installation Procedure
Step12 Connecting the power and
communication cables
Bushing bracket installation
When using conduit, the bushing bracket must be
installed as shown in the picture to attach the conduit.
12
3
5
4
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.
CAUTION
• 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 H05RN-F connection cable (or a more power
model), with insulation in synthetic rubber and a jacket
in polychloroprene (neoprene), in accordance with the
reαuirements 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.
4 Reassemble the electrical component box cover,
carefully tightening the screw.
L
1(L) 2(N)
F1 F2 LN
F2
NF1
Indoor power supply
Power supply Max/
Min(V) Indoor power cable
208 to 230V,
60 Hz ±10% 0.0012 inchࠏ (0.75mm2),
3 wires
Communication cable
0.0012 inchࠏ (0.75mm2), 2 wires
0.35(9.0)
0.54（13.8)
0.30(7.5)
0.50(12.6)
0.39(9.8)
push
Click
1 conduit tube 2 conduit tubes
Communication
cable
Indoor Power
cable Main power
cable
Cable clamp
Indoor Unit
Outdoor Unit
Cable
Tie
AC power: M4 screw Communication: M3.5 screw
Unit:inch(mm)

17
English
Installation Procedure
Tightening torque lbf·ft (kgf • cm)
M3.5 0.58 to 0.87 (8.0 to 12.0)
M4 0.87 to 1.30 (12.0 to 18.0)
• 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)
• 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 network room, use the double shielded
communication cable (tape aluminum / polyester
braid + copper) of FROHH2R type.
• Select the power cable in accordance with relevant
local and national.
• Wire size must comply with local and national code.
• You should connect the power cable into the power
cable terminal and fasten it with a clamp.
• The unbalanced power must be maintained within 10%
of supply rating among whole indoor units.
• If the power is unbalanced greatly, it may shorten
the life of the condenser. If the unbalanced power
is exceeded by more than 10% of supply rating,
the indoor unit will protect itself by stopping and
displaying an error code.
• Connect the power cable to the auxiliary circuit
breaker. An all pole disconnection from the power
supply must be incorporated in the fixed wiring
[0.12inch (3mm)].
• You must keep the cable in a protection tube.
• Maximum length of power cables are decided within
10% of power drop. If it exceeds, you must consider
another power supplying method.
• The circuit breaker (MCCB, ELB) should be considered
more capacity if many indoor units are connected from
one breaker.
• Use round pressure terminal for connections to the
power terminal block.
• Forwiring, use the designated power cable and
connect it firmly, then secure to prevent outside
pressure being exerted on the terminal board.
• Use an appropriate screwdriver for tightening the
terminal screws. A screwdriverwith a small head will
strip the head and make proper tightening impossible.
• Over-tightening the terminal screws may break them.
Step13 Optional: Extending the power
cable
1 Prepare the following tools.
Tools Spec Shape
Crimping pliers
MH-14
Connection sleeve
0.79xØ0.26inch
(20xØ6.5mm)
(HxOD)
Insulation tape
Width
0.75inch(19mm)
Contraction tube
2.76xØ0.31 inch
(70xØ8.0mm)
(LxOD)
2 As shown in the figure, peel off the shields from the
rubber and wire of the power cable.
• Peel off 0.79 inch
(20 mm) of cable shields from the
pre-installed tube.
0.79(20)
4.72(120)
7. 0 9( 1 8 0 )
0.79(20) 0.79(20)
2.36(60)
7. 0 9( 1 8 0 )
4.72(120)
2.36(60)
0.79(20) 0.79(20) 0.79(20)
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.
Unit:inch(mm)
Power cable
Pre-installed tube
for the power
cable

18 English
Installation Procedure
Installation Procedure
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.
Method 1 Method 2
Connection sleeve
Connection sleeve
CAUTION
• If cable wires are connected without using connecting
sleeves, their contact area becomes reduced, or
corrosion develops on the outer surfaces of the wires
(copper wires) over a long time. This may cause an
increase of resistance (reduction of passing current)
and conseαuently may result in a fire.
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
0.31 inch
(8.0 mm)
.
Compression
dimension
• After compressing it, pull both sides of the wire to
make sure it is firmly pressed.
Compress it 4 times
0.20 inch(5 mm)
Method 1 Method 2
Compress it 4 times
5 Apply heat to the contraction tube to contract it.
Contraction tube
Method 1
Contraction tube
Method 2
6 Wrap it with the insulation tape twice or more and
position your contraction tube in the middle of the
insulation tape.
1.57 inch (40 mm)
Insulation tape
Method 1
1.38 inch (35 mm)
Insulation tape
Method 2
7 After tube contraction work is completed, wrap it with
the insulation tape to finish.
Three or more layers of insulation are reαuired.
Insulation tape
Method 1
Insulation tape
Method 2
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.
0.20 inch(5 mm)

19
English
Installation Procedure
Step14 optional : Setting the Emergency Temperature Output (ETO) function
Emergency Temperature Output (ETO) function (for the multi system, this function is not supported.)
CAUTION
• In order to deploy the ETO function, the MIM-B14, an external contact interface module, must be installed in
each indoor unit.
–The ETO is a concept of emergency operation of indoor units. If the indoor unit 1 (main indoor unit) stops
because of an error, the indoor unit 2 (sub indoor unit) starts to operate.
–Basically, the indoor unit 2 operates in the previous mode. [For the first time operation, it starts in 75 °F (24
°C) Auto mode.]
–To set more detailed operation conditions for the indoor unit 2, use the S-net Pro.
Setting up the ETO
1 Main indoor unit
–Disable the external contact control (Default).
–Connect the S-net pro2 to F1 and F2.
–Enable the ETO function and set the temperature and time.
2 Sub indoor unit
–(Reαuired) Enable the external contact control (with the installation option SEG14 - Reverse Control).
–Connect the S-net pro2 to F1 and F2.
–Enable the entrance control and set the mode, set temperature, and fan speed.
Communication between
indoor and outdoor units
(F1 and F2)
External contact
interface module
MIM-B14
Error output port
(1, 2)
Contact input port
(5, 6)
Main indoor unit
Sub indoor unit

20 English
Installation Procedure
Installation Procedure
ETO operation specifications
1 Main indoor unit
–Based on the external contact control settings, the main indoor unit decides whether to generate output
when an error (indoor unit stop) occurs.
–Based on the ETO settings, the main indoor unit decides whether to generate output according to the
temperature and time conditions.
2 Sub indoor unit
–Based on the entrance control settings, the sub indoor unit decides the mode, set temperature, and fan
speed when contact inputs are given.
Main indoor unit
Enable of ETO Enable of
external contact Error port output
XX N/A
X O Output due to an error
OX
Output by ETO entrance conditions (temperature
/ time / error occurrence)
OO
Output by ETO entrance conditions (temperature
/ time / error occurrence)
KReady to control the main contact input
Sub indoor unit
Enable of
entrance control
Enable of
external contact Operation when outputting Main
XX N/A
X O On with the previous operation conditions
O O On with the entrance control enabled
[Main] [Sub]