Installation Manual

F615175
•
Read the following “SAFETY PRECAUTIONS” carefully before installation.
•
Electrical work must be installed by a licensed electrician. Be sure to use the correct rating of the power plug and main circuit for the model to be
installed.
•
The caution items stated here must be followed because these important contents are related to safety. The meaning of each indication used is as
below.
Incorrect installation due to ignoring of the instruction will cause harm or damage, and the seriousness is classifi ed by the following indications.
The items to be followed are classifi ed by the symbols:
•
Carry out test running to confi rm that no abnormality occurs after the installation. Then, explain to user the operation, care and maintenance as
stated in instructions. Please remind the customer to keep the operating instructions for future reference.
Required tools for Installation Works
1 Philips screw driver
2 Level gauge
3 Electric drill, hole core drill (ø70 mm)
4 Hexagonal wrench (4 mm)
5 Spanner
6 Pipe cutter
7 Reamer
8 Knife
9 Gas leak detector
10 Measuring tape
11 Thermometer
12 Megameter
13 Multimeter
14 Torque wrench
18 N•m (1.8 kgf.m)
42 N•m (4.3 kgf.m)
55 N•m (5.6 kgf.m)
65 N•m (6.6 kgf.m)
100 N•m (10.2 kgf.m)
15 Vacuum pump
16 Gauge manifold
OUTDOOR UNIT
•
The following parts are supplied as accessories with each outdoor unit.
Check that all accessory parts are present before installing the outdoor unit.
1. Please cut using pipe cutter and then remove the burrs.
2. Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused.
Turn the piping end down to avoid the metal powder entering the pipe.
3. Please make fl are after inserting the fl are nut onto the copper pipes.
CUTTING AND FLARING THE PIPING
Reamer
2. To remove burrs
Point down
Pipe
1. To cut
Bar
0 – 0.5 mm
Copper pipe
When properly fl ared, the internal surface
of the fl are will evenly shine and be of
even thickness. Since the flare part
comes into contact with the connections,
carefully check the fl are fi nish.
Improper fl aring 
Inclined Surface
damaged
Cracked Uneven
thickness
3. To fl are
Bar
Red arrow mark
Handle
Core
Yo k e
Clamp handle
6
HEAT INSULATION

If a drain elbow is used, the unit should be placed on a stand which is taller than 5 cm.

If the unit is used in an area where temperature falls below 0˚C for 2 or 3 days in
succession, it is recommended not to use a drain elbow, for the drain water freezes
and the fan will not rotate.

Operate the pump down according to the following procedures.
1. Confi rm the valve on the liquid side and gas side is open.
2. Press PUMP DOWN switch (SW1) on the display printed circuit board for more
than 5 seconds. Pump down (cooling) operation is performed for 15 minutes.
3. Set the liquid side 3 way valve to close position and wait until the pressure gauge
indicates 0.01MPa (0.1kg/cm
2
G).
4. Immediate set the gas side valve to close position and then press the PUMP DOWN
switch (SW1) to stop the pump down operation.
Note: Pump down operation will stop automatically after 15 minutes if PUMP DOWN
switch (SW1) is not pressed again.
Pump down operation is not started within 3 minutes after compressor is
stopped.

 After selecting the best location, start installation to Indoor/Outdoor Unit Installation Diagram.
1. Fix the unit on concrete or rigid frame fi rmly and horizontally with bolt nut (ø10 mm).
2. When installing at roof, please consider strong wind and earthquake.
Please fasten the installation stand fi rmly with bolt or nails.
2
INSTALL THE OUTDOOR UNIT
AB
C
D
SELECT THE BEST LOCATION
Outdoor Unit Installation Diagram
Installation parts you
should purchase ()
 This illustration is for explanation purposes only.
* Note:
Respective indoor unit installation procedure shall refer to instruction
manual provided in the indoor unit packaging.
It is advisable to avoid more
than 2 blockage directions.
For better ventilation &
multiple-outdoor installation,
please consult authorized
dealer/specialist.
 If total piping length of all indoor units exceeds the
minimum length listed above, additionally charge with 20g
of refrigerant (R410A) for each additional meter of piping.
Outdoor unit located
on upper side
Outdoor unit located
otherwise
j
h
j
h
g
i
Outdoor unit
Outdoor unit
Outdoor unit
Indoor unit Indoor unit
Indoor unit
Outdoor Unit Installation Guidelines
 Where a wall or other obstacle is in the path of outdoor unit’s intake or exhaust airfl ow, follow the installation guidelines below.
 For any of the below installation patterns, the wall height on the exhaust side should be 1200 mm or less.
Wall facing one side
More than 100
Side view Top view
1200
or less
More than 1000
More than 100 More than 1000
More than 100
More than 300
More
than 100
More than 1000
More than 100
Walls facing two side Walls facing three side
Top view
5
CONNECT THE CABLE TO THE OUTDOOR UNIT
1
1. Remove Control Board Cover (Metal) by loosening 2
screws.
2. Remove Valve Cover (Metal) by loosening 2 screws.
3. Remove Plugs.
4. Fix the conduit connectors to the knock out holes with
lock-nuts, then secure them.
5. Connecting wire between indoor unit and outdoor unit
should be UL listed or CSA approved 4 conductor wires
minimum AWG16 in accordance with local electric codes.
6. Wire Connection to the power supply (208/230V 60Hz)
through circuit breaker.


Connect the UL listed or CSA approved wires minimum
AWG12 to the terminal board, and connect to other
end of the wires to circuit breaker.
7. Connect the power supply cord and connecting wires
between indoor unit and outdoor unit according to the
diagram as shown.
WHEN INSTALLING AN AIR CONDITIONER, BE SURE
TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND
PIPES in the following procedure.
1. Connect a charging hose with a push pin to the Low
side of a charging set and the service port of the gas
side 3-way valve.

Be sure to connect the end of the charging hose with
the push pin to the service port.
2. Connect the center hose of the charging set to a vacuum
pump.
3. Turn on the power switch of the vacuum pump and make
sure that the needle in the gauge moves from 0 cmHg
(0 MPa) to –76 cmHg (–0.1 MPa). Then evacuate the
air for approximately ten minutes.
4. Close the Low side valve of the charging set and turn
off the vacuum pump. Make sure that the needle in the
gauge does not move for approximately fi ve minutes.
Note : BE SURE TO FOLLOW THIS PROCEDURE
IN ORDER TO AVOID REFRIGERANT GAS
LEAKAGE.
5. Disconnect the charging hose from the vacuum pump
and from the service port of the 3-way valve.
6. Tighten the service port caps of gas side 3-way valve
at a torque of 18 N•m with a torque wrench.
7. Remove the valve caps of both of the gas side and liquid
side 3-way valve. Position both of the valves to “OPEN”
using a hexagonal wrench (4 mm).
8. Mount valve caps onto the gas side and liquid side of
the 3-way valve.

Be sure to check for gas leakage.
Connectors
Control Board Cover
(Metal)
Unit A Unit B
8. For wire stripping and connection requirement, refer to the diagram below.
9. Secure the power supply cord and connecting cables onto the control board with the holder.
10. Attach the control board cover (metal and resin) and valve cover back to the original position with screw.
Wire stripping
5 mm
or more
(gap between
wires)
Conductor
over inserted
No loose strand when
inserted
Indoor/outdoor
connecting
terminal board
Conductor
fully inserted
Conductor not
fully inserted
This equipment must be
properly earthed.

Earth wire must be Yellow/
Green (Y/G) in colour and
longer than other AC wires for
safety reasons.

Setting of Cooling only operation.
The equipment can be set to cooling only operation by setting the JP line on
the outdoor unit display circuit board.
[Setting method]
Switch off power supply to the outdoor unit, cut JPN1 (COOL ONLY) as shown
in Figure 1.
After cutting off the wire, switch ON the equipment power.
When setting the cooling only operation, Heating operation is disabled.
ODOUR WASH operation is disabled. (Odour cut operation is still enabled.)
To revert the setting back to heat pump operation, switch OFF the equipment
power, reconnect JP1 (COOL ONLY) back to short circuit condition and switch
ON the equipment power.
This product capable to correct the wiring error automatically by following
procedures.
1. Confi rm the valve on the liquid side and gas side is open.
2. Press WIRING CHECK switch (SW3) on the display printed circuit board for
more than 10 seconds to start wiring check operation.
3. Wiring check process will complete in approximately 10 minutes. However, wiring
check operation will not start within 3 minutes after compressor is stopped. When
outdoor air temperature is less than 5°C or unit is malfunctioning, wiring check
will not start. (See NOTE 2)
The LED 2 to 6 in display printed circuit board inside the outdoor unit indicate
whether correction is possible or not and the status of the correction, as shown
in the table below.
1. For two rooms, LED 4 and 5 are not illuminated after wiring operation is complete.
2. If the outdoor air temperature is less than 5°C or unit has abnormality, wiring operation will not start.
3. After wiring check operation is complete, LED indication will be illuminated until normal operation starts.
4. Follow the product diagnosis procedure. (Check the diagnostic label at the control board cover.)
5. When LED 1 only is illuminated, this indicates that outdoor unit is operating normally.
NOTE
Short circuit of the blow-out air
Smooth fl ow of the drain
Reliable thermal insulation
Leakage of refrigerant
Mistake in wiring
Reliable connection of the grand wire
Looseness in terminal screw
Grounding/Earth connection
Close
Hexagonal
wrench
Liquid shut-off valve
Gas shut-off valve
Valve lid
Install the hose at an angle so that
the water smoothly fl ows out.
Drain elbow
4
EVACUATION OF THE EQUIPMENT
CLOSE
Vacuum pump adaptor
Outdoor unit
Liquid side
Gas
side
OPEN
Vacuum
pump
Liquid side 3-way valve
Gas side 3-way valve
Liquid side
Gas
side
Tube connector
Tube connector
Tube connector
Tube connector
Close
Close
Indoor Unit
Indoor Unit
Decide piping length and then cut by using pipe cutter. Remove burrs from cut edge.
Make fl are after inserting the fl are nut (locate at valve) onto the copper pipe.
Align center of piping to valves and then tighten with torque wrench to the specifi ed
torque as stated in the table.
3
CONNECT THE PIPING

 Remove the control board cover (resin) from the outdoor unit by loosening three
screws.
Screws
Control Board Cover (resin)
Flare Nut
Torque Wrench for
Flare Nut
(Connection Pipe)
(Connection Pipe)
Applicable to
Liquid and Gas side of
CS-E9***
CS-E12***
3/8" Gas side piping ()
1/4" Liquid side piping ()
Additional drain hose ()
Connecting cable ()
(Conduit)
Power supply cord ()
(Conduit)
10 ± 1 mm
Unit : mm
O: Flashing
Torque Wrench for
Flare Nut
Liquid side
Gas side
Flare Nut
Power Supply
Cord
Indoor & outdoor
connection wire
Indoor
Unit A
Indoor
Unit B
F615175
ENGLISH
PRINTED IN MALAYSIA
Wiring error check
LED lighting sequence after a wiring correction.
Order of LED fl ashing: 3--> 2
Wiring automatic correct example
Terminal block
From Room B
to the “living
room”
From Room A to the
“bedroom”
Plugs
Knock Out Holes
Side Panel
Valve Cover
(Metal)
Screws
Lock Nuts
Screws
Top Panel
Screw
Power Supply
1 2 3
1 2 3
(UNIT B)
Fig. 1
SW1 (PUMP DOWN)
SW2 (OPERATION
TEST)
JP1 (COOL
ONLY)
SW3 (WIRING CHECK)
L1
L2
3
3
2
2
1
1
OFF ON
OFF ON
LED 1
LED 2
LED 3
LED 4
LED 5
LED 6
QUICK GUIDE
PIPING & ELECTRICAL SPECIFICATION
Example:
If total piping length of all installed indoor units is at 22.5m, the quantity of additional refrigerant should be 50 g ........ (22.5 – 20) m x 20 g/m = 50 g.
Do not overtighten, overtightening may cause gas leakage.
Terminals on the indoor unit 1 2 3
Colour of wires (Connecting cable)
Terminals on the outdoor unit L1 L2 1 2 3
(Power supply cord) (UNIT A)
SAFETY PRECAUTIONS
WARNING
This indication shows the possibility of causing death or serious injury.
CAUTION
This indication shows the possibility of causing injury or damage to properties only.
Symbol with white background denotes item that is PROHIBITED from doing.
Symbol with dark background denotes item that must be carried out.
WARNING
Do not install outdoor unit near handrail of veranda. When installing air-conditioner unit on veranda of a high rise building, child may climb up to outdoor unit and
cross over the handrail causing an accident.
Do not use unspecifi ed cord, modifi ed cord, joint cord or extension cord for power supply cord. Do not share the single outlet with other electrical appliances. Poor
contact, poor insulation or over current will cause electrical shock or fi re.
Do not tie up the power supply cord into a bundle by band. Abnormal temperature rise on power supply cord may happen.
Do not insert your fi ngers or other objects into the unit, high speed rotating fan may cause injury.
Do not sit or step on the unit, you may fall down accidentally.
Keep plastic bag (packaging material) away from small children, it may cling to nose and mouth and prevent breathing.
When installing or relocating air conditioner, do not let any substance other than the specifi ed refrigerant, eg. air etc. mix into refrigeration cycle (piping). Mixing of
air etc will cause abnormal high pressure in refrigeration cycle and result in explosion, injury etc.
Do not add or replace refrigerant other than specifi ed type. It may cause product damage, burst and injury etc.
● For R410A model, use piping, fl are nut and tools which is specifi ed for R410A refrigerant. Using of existing (R22) piping, fl are nut and tools may cause abnormally
high pressure in the refrigerant cycle (piping), and possibly result in explosion and injury.
● Thickness or copper pipes used with R410A must be more than 0.8mm. Never use copper pipes thinner than 0.8mm.
● It is desirable that the amount of residual oil is less than 40mg/10m..
Engage authorized dealer or specialist for installation. If installation done by the user is incorrect, it will cause water leakage, electrical shock or fi re.
Install according to this installation instructions strictly. If installation is defective, it will cause water leakage, electrical shock or fi re.
Use the attached accessories parts and specifi ed parts for installation. Otherwise, it will cause the set to fall, water leakage, fi re or electrical shock.
Install at a strong and fi rm location which is able to withstand the set’s weight. If the strength is not enough or installation is not properly done, the set will drop and
cause injury.
For installation work, follow all electrical, building, plumbing, local codes, regulations and these installation instructions. If electrical circuit capacity is not enough or a
defect is found in electrical work, it will cause electrical shock or fi re.
Do not use spliced wires for indoor / outdoor connection cable. Use the specifi ed indoor / outdoor connection cable, refer to instruction 5 INDOOR/OUTDOOR UNIT
ELECTRICAL WIRING and connect tightly for indoor/outdoor connection. Clamp the cable so that no external force will have impact on the terminal. If connection or
fi xing is not perfect, it will cause heat-up or fi re at the connection.
Wire routing must be properly arranged so that control board cover is fi xed properly. If control board cover is not fi xed perfectly, it will cause fi re or electrical shock.
This equipment must installed with an Earth Leakage Circuit Breaker (ELCB) or Ground Fault Current Interrupter (GFCI) or Appliance Leakage Current Interrupter
(ALCI) that has been certifi ed by an NRTL Certifi ed Testing Agency and that is suitable for the voltages and amperages involved. Otherwise, if may cause electrical
shock and fi re in case of equipment breakdown.
During installation, install the refrigerant piping properly before running the compressor. Operation of compressor without fi xing refrigeration piping and valves at
opened condition will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury etc.
During pump down operation, stop the compressor before removing the refrigeration piping. Removal of refrigeration piping while compressor is operating and valves
are opened will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury etc.
Tighten the fl are nut with torque wrench according to specifi ed method. If the fl are nut is over-tightened, after a long period, the fl are may break and cause refrigerant
gas leakage.
Ventilate if there is refrigerant gas leakage during operation. It may cause toxic gas when the refrigerant comes into contact with fi re.
This equipment must be properly earthed. Earth line must not be connected to gas pipe, water pipe, earth of lightning rod and telephone. Otherwise, it may cause
electrical shock in case of equipment breakdown or insulation breakdown.
CAUTION
Do not install the unit at place where leakage of fl ammable gas may occur. In case gas leaks and accumulates at surrounding of the unit, it may cause fi re.
Do not release refrigerant during piping work for installation, re-installation and during repairing a refrigeration parts. Take care of the liquid refrigerant, it may cause
frostbite.
Do not install this appliance in a laundry room or other location where water may drip from the ceiling, etc.
Do not touch the sharp aluminium fi n, sharp parts may cause injury.
Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water may enter the room and damage the furniture.
Select an installation location which is easy for maintenance.
Power supply connection to the room air conditioner.
Power supply cord shall be UL listed or CSA approved 3 conductor with minimum AWG12 wires.
Power supply point should be in an easily accessible place for power disconnection in case of emergency.
In some countries, permanent connection of this air conditioner to the power supply is prohibited.
Fix power supply connection to a circuit breaker for the permanent connection.
Use NRTL approved fuse or circuit breaker (rating refers to name plate) for the permanent connection.
Installation work.
It may take two people to carry out the installation work.
ACCESSORIES SUPPLIED WITH OUTDOOR UNIT
Heat pump-types only
Part name Qty. Diagram Application
Drain elbow 1
For connecting
the drain pipe
Indoor(ID) & Outdoor(OD) units:
Possible Combination Patterns
Refrigerant
Piping size
Standard
pipe length
Max.
Elevation
Min. pipe
length for
each ID unit
Max. from
OD to
each ID
Max.
total length
Min. total pipe
length for
additional gas
Additional
refrigerant
Power
supply
Power
supply
wire size
OD-ID
connection
wire size
Gas Liquid
Outdoor (OD): CU-2E18NBK
Indoor (ID): 2 UNITS OF CS-E9NKKW
R410A
ø3/8”
(ø9.52mm)
ø1/4”
(ø6.35mm)
7.5 m
See
Step 1
3 m 25 m 50 m 20 m
20 g/m
208/230V
60 Hz
MCA 20A
MOP 25A
AWG12 AWG16
Outdoor (OD): CU-2E18NBK
Indoor (ID): 2 UNITS OF CS-E12NKKW
Outdoor (OD): CU-2E18NBK
Indoor (ID): 1 UNIT OF CS-E9NKKW
+ 1 UNIT OF CS-E12NKKW
 If an awning is built over the unit to prevent direct sunlight or
rain, be careful that heat radiation from the condenser is not
obstructed.
 There should not be any animal or plant which could be
affected by hot air discharged.
 Keep the spaces indicated by arrows from wall, ceiling, fence
or other obstacles.
 Do not place any obstacles which may cause a short circuit
of the discharged air.
 Recommended installation height for outdoor unit should be
above the seasonal snow level.
OUTDOOR UNIT
Refrigerant piping size
Outdoor Unit CU-2E18***
Liquid - side ø1/4
" (ø6.35mm) t0.8mm
Gas - side ø3/8
" (ø9.52mm) t0.8mm
Outdoor Unit CU-2E18***
Min. total piping length for
additional gas
20 m
Allowable piping length
Outdoor Unit CU-2E18***
Allowable piping length of each indoor unit (min. ~ max.) 3 m ~ 25 m
Allowable total piping length of all indoor unit 50 m or less
Height difference between indoor and outdoor unit
Outdoor unit located on upper side
g
15 m or less
Outdoor unit located otherwise
h
7.5 m or less
Height difference between indoor unit
Outdoor unit located on upper side
i
7.5 m or less
Outdoor unit located otherwise
j
15 m or less
Model A B C D
CU-2E18*** 613 mm 131 mm 16 mm 360.5 mm
Piping size Torque
1/4" (6.35 mm) [18 N•m (1.8 kgf.m)]
3/8" (9.52 mm) [42 N•m (4.3 kgf.m)]
1/2" (12.7 mm) [55 N•m (5.6 kgf.m)]
5/8" (15.88 mm) [65 N•m (6.6 kgf.m)]
3/4" (19.05 mm) [100 N•m (10.2 kgf.m)]
Connecting the Piping to Outdoor Unit
CAUTION

If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1MPa), in step 3 above take the following measure:
- If the leak stops when the piping connections are tightened further, continue working from step 3.
- If the leak does not stop when the connections are retightened, repair the location of leak.
- Do not release refrigerant during piping work for installation and reinstallation.
- Take care when handling the liquid refrigerant, it may cause frostbite.
DISPOSAL OF OUTDOOR UNIT DRAIN WATER
WIRE STRIPPING AND CONNECTING REQUIREMENT
PUMP DOWN OPERATION
WIRING ERROR CHECK
CHECK ITEMS
COOLING ONLY OPERATION
CAUTION
Use a material with good heat-resistant properties as the heat
insulation for the pipes. Be sure to insulate both the gas-side and liquid-
side pipes. If the pipes are not adequately insulated, condensation or
water leakages may occur.
Liquid-side pipes
Material shall
withstand 120°C
or higher
Gas-side pipes
LED 2 3 4 5 Message
Status
O O O O Pump down operation progress
O O O 3 minutes before operation end
O O 2 minutes before operation end
O 1 minute before operation end
Pump down operation end
LED 2 3 4 5 6 Message
Room A B – – –
Status
All fl ashing Automatic correction impossible
LED 2, 4, 6 and LED 3, 5 alternatively fl ashing Wiring check in progress
Flashing one after another Automatic correction completed
Other than above Unit has abnormally (Note 4)
If automatic correct is impossible, check the indoor unit wiring and piping manually.
Female side
Male side
ACCEPT PROHIBITED PROHIBITED