TM

SERIES

5 . INSTALLATION
 5-1. PIPING DESIGN
5-1-1. PIPING METHOD
SUMMARY OF PIPING SYSTEM
Heat pump type / Cooling only type

Outdoor Separation
unit tube Header

EV kit

Indoor Indoor Indoor

unit unit unit

Indoor Indoor Indoor

unit unit unit

INSTALLATION
INSTALLATION

Separation of piping : Separation tube system and header system

Number of piping : 2 each of outdoor unit - indoor unit

- (05 - 01) -
 TYPE OF PIPING SYSTEM
Line Piping System

Outdoor Separation
unit tube

EV kit

Indoor Indoor Indoor Indoor Indoor Indoor

unit unit unit unit unit unit

Header Piping System

Outdoor Header
unit

EV kit

Indoor Indoor Indoor Indoor Indoor Indoor

unit unit unit unit unit unit
INSTALLATION

INSTALLATION
Combined (Separation tube/Header) Piping System
Separation
Outdoor tube Header
unit

EV kit

Indoor Indoor Indoor Indoor Indoor Indoor

unit unit unit unit unit unit

Separation
Outdoor tube Header
unit

EV kit

Indoor Indoor Indoor

unit unit unit
Indoor Indoor Indoor
unit unit unit

Separation after header is not allowed.

- (05 - 02) -
 5-1-2. LIMITATIONS
EXAMPLE 1 EXAMPLE 2
Branch kit : Header Branch kit : Separation tube

Outdoor Outdoor
unit unit

a a
b c d e

H1
H1 g h i j k
b c d e EV kit f
l EV kit
Indoor Indoor Indoor Indoor Indoor Indoor Indoor Indoor
unit unit unit unit unit unit unit unit H2
H2
f Indoor
unit
Indoor
unit

EXAMPLE 3
Branch kit : Separation tube + Header

Outdoor
unit

a b

EV kit

H1 g c d e f
i j
h Indoor Indoor Indoor Indoor
Indoor
unit unit unit unit H2
INSTALLATION

INSTALLATION
unit

Indoor
unit

CAUTIONS
Keep the length of straight portion of pipe between two branch kits longer than 0.5m.
Don't use separation tube downstream of header.
Install separation tube and header in the correct direction specified in installation manual.

Maximum allowable length (actual pipe length) EXAMPLE 1 EXAMPLE 2 EXAMPLE 3

a+b a+g a+g+h
a+c a+b+h a+g+i
Between outdoor unit and a+d a+b+c+i a+b+c
70m
the farthest indoor unit a+e a+b+c+d+j a+b+d
- a+b+c+d+e+k a+b+e
- a+b+c+d+ e+f a+b+f
a+b+c+d+e+f a+b+c+d+e
Total pipe length 115m a+b+c+d+e
+g+h+i+j+k +f+g+h+i
Between outdoor unit
60m a
and the 1st branch kit
b g g+h
c b+h g+i
Between the 1st branch kit d b+c+i b+c
40m
and the farthest indoor unit e b+c+d+j b+d
b+c+d+e+k b+e
b+c+d+ e+f b+f
Between EV kit
1.2m f l j
and indoor unit
Note: The limit value of the shortest piping length is 7.5m.

Maximum allowable height difference EXAMPLE 1 EXAMPLE 2 EXAMPLE 3

Between outdoor unit and indoor unit 30m H1
AJ*A54 15m
Between indoor units H2
AO*54 5m
- (05 - 03) -
 5-1-3. PIPE SIZE
REFRIGERANT PIPING MATERIAL AND WALL THICKNESS
It is necessary to use seamless copper tubes for refrigerant use.
Thickness of tubes are shown in table below. The design pressure is 4.2 MPa.

Outside diameter
(mm) 6.35 9.52 12.70 15.88 19.05
1)
Material ASTM B280; JIS H3300 C1220T-O or equivalent
Wall thickness
(mm) 0.8 0.8 0.8 1.0 1.2
2
1) : Allowable tensile stress 33 N/mm at 125°C.

Pipe size connected to outdoor unit.

Outside diameter (mm)

Outdoor unit Liquid pipe Gas pipe
9.52 19.05

Between two adjacent refrigerant branch kits.

Outside diameter (mm)
Total model code of indoor unit
INSTALLATION

INSTALLATION
Liquid pipe Gas pipe
Less than 14 6.35 12.70
15 or more to 16 9.52 12.70
17 or more to 30 9.52 15.88
31 or more 9.52 19.05

Connection pipe size of indoor unit.

Outside diameter (mm)

Model code of indoor unit
Liquid pipe Gas pipe
7, 9 6.35 9.52
12, 14 6.35 12.70
18, 20, 22, 24, 25 6.35 15.88
30 9.52 15.88
36, 45, 54 9.52 19.05

- (05 - 04) -
 5-1-4. SELECTION OF PIPE HEAT INSULATING MATERIAL
1. Always insulate the refrigerant pipe to prevent condensation and water droplets by the refrigerant pipe.
2. Decide the thickness of the heat insulating material by referring to the recommended minimum thickness
in Table 1.
(For installation condition T=30°CDB, humidity 70%, humidity 75%, humidity 80%, humidity 85%)

3. When the outdoor unit is installed at a higher position than the indoor unit, fill the connecting part gap with
putty, etc. to prevent the dew condensation water of the valve of the outdoor unit from flowing to
the indoors from the gap between the pipe and the heat insulating material.
4. Liquid pipe and gas pipe should be completely insulated with same specification and sealed.
5. In case not to insulate and not to seal refrigerant pipe completely, it will become the cause of water leak.

Table 1 Size of refrigerant pipe and recommended minimum thickness of heat insulating material
(In case a heat insulating material which thermal conductivity is equal to or less than 0.040 W/(m·k)
at 20°C is used.

Recommended minimum thickness of heat insulating material (mm)

Refrigerant pipe outside diameter Relative humidity
(mm) 70% 75% 80% 85%
6.35 8 10 13 17
INSTALLATION

INSTALLATION
9.52 9 11 14 18
12.70 10 12 15 19
15.88 10 12 16 20
19.05 10 13 16 21

When an ambient temperature and relative humidity exceed 30°CDB and 85% respectively,
please strengthen heat insulation of refrigerant pipe. When not strengthening heat insulation of refrigerant
pipe, the surface of the heat insulation may be dewed.

Gas Pipe Gas Pipe

Connection cable

Finishing Tape
Liquid Pipe
Liquid Pipe
Heat Insulation Heat Insulation

1.Make sure that pipe is covered completely by the heat insulation,not expoding to air.
Inadequate heat insulation may cause condensation.
2.Do not covered heat insulation gas and liquid pipes together as above figure.
It may cause condensation and capacity drop by heat loss.

- (05 - 05) -
 5-1-5. ADDITIONAL CHARGE CALCULATION

When adding refrigerant, follow the formula below.

Add the refrigerant according to the result.

Liquid pipe diameter (mm) 9.52 6.35

Additional refrigerant
0.06 0.02
(kg/m)

(1) The amount of additional charge C(kg)

Total length Total length
of of
Ø9.52mm Ø6.35mm
C= liquid pipe x 0.06 + liquid pipe x 0.02 = (1)
(kg/m) (kg/m)
m m
kg kg

Example : When the liquid pipe length Ø9.52mm = 35m

INSTALLATION

INSTALLATION
Ø6.35mm = 20m
" Additional charge for pipe length " is
35(m) x 0.06(kg/m) + 20(m) x 0.02(kg/m) = 2.50(kg) (1)

- (05 - 06) -
 5-1-6. EXAMPLE OF PIPING DESIGN
(1) Refrigerant system

Outdoor
unit

a b

A
c
B C
EV kit

d e f g h i j k

1 2 3 4 5 6 7 8
Indoor Indoor Indoor Indoor Indoor Indoor Indoor Indoor
unit unit unit unit unit unit unit unit

System configuration
1 2 3 4 5 6 7 8 Total capacity

Example 1 AR7 AR7 AR7 AR7 AR7 AR7 AR7 AR7

Capacity(kW) 2.15 2.15 2.15 2.15 2.15 2.15 2.15 2.15 17.2
Example 2 AR9 AR9 AR9 AR9 AR9 AR12 AR12 AR12
INSTALLATION

INSTALLATION
Capacity(kW) 2.8 2.8 2.8 2.8 2.8 3.5 3.5 3.5 24.5

Total indoor unit capacity (1 refrigerant system)

Example1 : Total capacity = 17.2 22.8
Example2 : Total capacity = 24.5 22.8 Example 2 cannot be selected

Selection of pipe size (Example 1)

(unit : mm)
a b c d e f g
Gas Pipe Ø19.05 Ø15.88 Ø15.88 Ø9.52 Ø9.52 Ø9.52 Ø9.52
Liquid Pipe Ø9.52 Ø9.52 Ø9.52 Ø6.35 Ø6.35 Ø6.35 Ø6.35
Length [m] (Example) 10 10 15 5 5 10 5

h I j k
Ø9.52 Ø9.52 Ø9.52 Ø9.52
Ø6.35 Ø6.35 Ø6.35 Ø6.35
5 10 10 5

- (05 - 07) -
 Pipe length
Maximum allowable length (actual pipe length) Refrigerant system 1
a+b+h 25m
a+b+i 30m
a+b+j 30m
Between outdoor unit and a+b+k 25m
70m
the farthest indoor unit a+c+d 30m
a+c+e 30m
a+c+f 35m
a+c+g 30m
Total pipe length 115m a+b+c+d+e+f+g+h+i+j+k 90m
Between outdoor unit and the 1st branch kit 60m a 10m
b+h 15m
b+i 20m
b+j 20m
Between the 1st branch kit b+k 15m
40m
and the farthest indoor unit c+d 20m
c+e 20m
c+f 25m
c+g 20m
Between EV kit and indoor unit 1.2m - Within limit
INSTALLATION

INSTALLATION
Maximum allowable height difference Refrigerant system 1
Between outdoor unit and indoor unit 30m - Within limit
AJ*A54 15m
Between indoor units - Within limit
AO*54 5m

Selection of separation tube and header

A B C
UTR-BP054X /
Model name UTR-HD546U UTR-HD546U
UTR-BP54U

Additional charge
Liquid pipe diameter (mm) 9.52 6.35

Additional refrigerant (kg/m) 0.06 0.02

Liquid pipe length (m) 35 55

Additional refrigerant
(0.06 x 35) + (0.02 x 55) = 3.20 (kg)

- (05 - 08) -
 (2) Refrigerant system

Outdoor
unit

a
A

b c d e
EV kit

1 2 3 4
Indoor Indoor Indoor Indoor
unit unit unit unit

System configuration

1 2 3 4 Total capacity

Example 1 AR12 AR12 AR18 AR22

Capacity(kW) 3.5 3.5 5.3 6.0 18.3
Example 2 AR18 AR22 AR22 AR22
INSTALLATION

INSTALLATION
Capacity(kW) 5.3 6.0 6.0 6.0 23.3

Total capacity of indoor unit (1 refrigerant system)

Example1 : Total capacity = 18.3 22.8
Example2 : Total capacity = 23.3 22.8 Example 2 cannot selected.

Selection of pipe size (Example 1)

(unit : mm)
a b c d e
Gas Pipe Ø19.05 Ø12.70 Ø12.70 Ø15.88 Ø15.88
Liquid Pipe Ø9.52 Ø6.35 Ø6.35 Ø6.35 Ø6.35
Length [m] (Example) 20 15 10 10 15

- (05 - 09) -
 Pipe length
Maximum allowable length (actual pipe length) Refrigerant system 2
a+b 35m
Between outdoor unit and a+c 30m
70m
the farthest indoor unit a+d 30m
a+e 35m
Total pipe length 115m a+b+c+d+e 70m
Between outdoor unit and the 1st branch kit 60m a 20m
b 15m
Between the 1st branch kit c 10m
40m
and the farthest indoor unit d 10m
e 15m
Between EV kit and indoor unit 1.2m - Within limit

Maximum allowable height difference Refrigerant system 2

Between outdoor unit and indoor unit 30m - Within limit
AJ*A54 15m
Between indoor units - Within limit
AO*54 5m

Selection of header
A
INSTALLATION

INSTALLATION
Model name UTR-HD546U

Additional charge

Liquid pipe diameter (mm) 9.52 6.35

Additional refrigerant (kg/m) 0.06 0.02

Liquid pipe length (m) 20 50

Additional refrigerant
(0.06 x 20) + (0.02 x 50) = 2.20 (kg)

- (05 - 10) -
 (3) Refrigerant system
Outdoor
unit

a b

A
B
c

C
EV kit
d e
f g h i

1 2 3 4 5 6
Indoor Indoor Indoor Indoor Indoor Indoor
unit unit unit unit unit unit

System configuration
1 2 3 4 5 6 Total capacity

Example 1 AS12 AS18 AR9 AR9 AR9 AR9

Capacity (kW) 3.5 5.4 2.8 2.8 2.8 2.8 20.1
Example 2 AS18 AS18 AR14 AR14 AR14 AR14
5.4 5.4 4.0 4.0 4.0 4.0 26.8
INSTALLATION

INSTALLATION
Capacity (kW)

Total capacity of indoor unit (1 refrigerant system)

Example1 : Total capacity = 20.1 22.8
Example2 : Total capacity = 26.8 22.8 Example 2 cannot selected.

Selection of pipe size (Example 1)

(unit : mm)
a b c d e f g
Gas Pipe Ø19.05 Ø19.05 Ø15.88 Ø12.70 Ø15.88 Ø9.52 Ø9.52
Liquid Pipe Ø9.52 Ø9.52 Ø9.52 Ø6.35 Ø6.35 Ø6.35 Ø6.35
Length [m] (Example) 10 20 5 7 12 10 5

h I
Ø9.52 Ø9.52
Ø6.35 Ø6.35
5 10

- (05 - 11) -
 Pipe length
Maximum allowable length (actual pipe length) Refrigerant system 3
a+b+f 40m
a+b+g 35m
Between outdoor unit and a+b+h 35m
70m
the farthest indoor unit a+b+i 40m
a+c+d 22m
a+c+e 27m
Total pipe length 115m a+b+c+d+e+f+g+h+i 84m
Between outdoor unit and the 1st branch kit 60m a 10m
b+f 30m
b+g 25m
Between the 1st branch kit b+h 25m
40m
and the farthest indoor unit b+i 30m
c+d 12m
c+e 17m
Between EV kit and indoor unit 1.2m - Within limit

Maximum allowable height difference Refrigerant system 3

Between outdoor unit and indoor unit 30m - Within limit
AJ*A54 15m
Between indoor units - Within limit
AO*54 5m
INSTALLATION

INSTALLATION
Selection of separation tube and header
A B C
UTR-BP054X / UTR-BP054X /
Model name UTR-HD546U
UTR-BP54U UTR-BP54U

Additional charge
Liquid pipe diameter (mm) 9.52 6.35

Additional refrigerant (kg/m) 0.06 0.02

Liquid pipe length (m) 35 49

Additional refrigerant
(0.06 x 35) + (0.02 x 49) = 3.08 (kg)

- (05 - 12) -
 5-2. WIRING DESIGN
5-2-1. WIRING SPECIFICATIONS
Wire size
Use 2 Remark
[ cross-section (mm )]
H07RN-F or equivalent,
Power supply cable Outdoor unit 5.0 to 8.0 Single-phase, 50HZ, 220-240V, 1
2Wire + Ground

> 2.5 H07RN-F or equivalent,

Connection cable Indoor unit > 1.5 Single-phase, 50HZ, 220-240V, 2
(If total wire length < 50 m) 3Wire + Ground
Remote controller cable
(wired, simple remote controller) 0.33 PVC sheath, Polar 3-core 3
Remote controller cable
(external switch controller) 0.33 PVC sheath, Polar 3-core 4
Remote controller cable
(group remote controller) 0.33 Shield cable, Polar 3-core 5

External input cable 0.33 Twisted-pair, Polar 2-core 6

External output cable 0.33 Twisted-pair, Polar 2-core 6

INSTALLATION

INSTALLATION
Circuit breaker 30 (A) 7
NOTE: Installation work must be performer as outlined in installation manuals of equipments
and in accordance with national wiring standards and codes.

1 Always ground the unit.

2 The total length of the connection cable (TL) should be shorter than or equal to 150m
If TL > 100m, keep the length of the connection cable between the units longer than 5m.
3 10m cable attached (excluded some models). 22AWG or equivalent. Maximum length is 500m.
Use shielded cable in accordance with the standard of the country.
4 Field supply. Use shielded cable in accordance with the standard of the country.
22AWG or equivalent.
5 Field supply. 22AWG or equivalent.
6 Field supply. 22AWG or equivalent. Maximum length is 25m.
Use shielded cable in accordance with the standard of the country.
7 The capacity of the circuit breaker for leak current should be 30mA or more.

- (05 - 13) -
 5-2-2. POWER SUPPLY & CONNECTION CABLE WIRING
POWER SUPPLY CABLE SPECIFICATION AND LIMITATIONS
Always make the air conditioner power supply a special branch circuit and provide a
special breaker.
The capacity of the circuit breaker for leak current should be 30 mA or more.
The total length of the connection cable (TL) should be shorter than 150m.
If the total length of the connection cable exceeds 100m, keep the length of the connection
cable between the units longer than 5m.

Example : Power supply cable wiring.

Power supply cable Connection cable
(2wire + ground) Outdoor unit (3wire + ground)
(Power supply & signal)

a b c d e f g h i
Breaker

Indoor
220 - 240V 1 50Hz
unit

Total length of the connection cable (TL)

TL = b + c + d + e + f + g + h + i < 150m
INSTALLATION

INSTALLATION
IF TL > 100m
c > 5m, d > 5m, e > 5m, f > 5m, g > 5m, h > 5m, i > 5m

WIRING PROHIBITION MATTER

The following wiring is forbidden.
Connection cable
Power supply cable
Outdoor unit (3wire + ground)
(2wire + ground)
(Power supply & signal)

Breaker

Indoor
220 - 240V 1 50Hz
unit

The wiring which branched from the outdoor unit to plurality and was connected to
the indoor unit is prohibition.
Connection cable
Power supply cable
(3wire + ground)
(2wire + ground) Outdoor unit
(Power supply & signal)

Breaker

Indoor
220 - 240V 1 50Hz unit
Terminal board

Prohibition performs wiring work, using a terminal box two or more.

- (05 - 14) -
 5-2-3. WIRING EXAMPLE
OUTDOOR UNIT

Power Indoor unit

E E
L N 1(L)2(N) 3

INDOOR UNIT INDOOR UNIT INDOOR UNIT (Duct type)

Connect to CN13(PCB)

220-240V REMOTE CONTROL

CORD
CONNECTION CABLE
E
REMOTE CONTROL
CORD
CONNECTION CABLE
E
REMOTE CONTROL
CORD
CONNECTION CABLE
E
1 50Hz 1 2 3 1(L)2(N) 3 1 2 3 1(L)2(N) 3 1 2 3 1(L)2(N) 3

220-240V
1 50Hz

WIRED REMOTE SIMPLE REMOTE

CONTROLLER CONTROLLER

WIRELESS REMOTE
CONTROLLER

INDOOR UNIT 1)
CONVERTOR (Compact wall mounted type)
* INDOOR UNIT INDOOR UNIT
INSTALLATION

INSTALLATION
RC Line AC Line REMOTE CONTROL REMOTE CONTROL REMOTE CONTROL
CONNECTION CABLE CONNECTION CABLE CONNECTION CABLE
CORD E CORD E CORD E
(L)(N) (G)
1 2 3 G 1 2 3 4 1 2 3 1(L)2(N) 3 1 2 3 1(L)2(N) 3 1 2 3 1(L)2(N) 3

GROUP REMOTE WIRED REMOTE WIRED REMOTE SIMPLE REMOTE

CONTROLLER CONTROLLER CONTROLLER CONTROLLER
WIRELESS
WIRELESS
REMOTE 2 REMOTE CONTROLLERS
REMOTE
CONTROLLER
CONTROLLER
2 REMOTE CONTROLLERS

* 1) for
Wired and simple remote controllers are not available
compact wall mounted type indoor units.

- (05 - 15) -
 5-3. SYSTEM SETTING
5-3-1. SYSTEM TYPE SETTING
Set the DIP switch to the corresponding system type as shown in the table.
Do not use a nonexistent switch combination.

WIRED,SIMPLE REMOTE CONTROLLER

( . . . Factory setting)
SW 4
Heat pump OFF
Cooling only ON

PIPE LENGTH SETTING (OUTDOOR UNIT)

Depending on the pipe length, the set-up of the pipe length switch is required.
SW setting can provide the operation to supplement the loss created by the pipe length.
( . . . Factory setting)

Pipe length
Recommended SW 6-1 SW 6-2
range of L (m)
INSTALLATION

INSTALLATION
Standard 7.5 <
= L < 50 OFF OFF

L 50 <
=L <
= 70 ON ON

Pipe length : L (m)

Outdoor unit

Header

EV kit

Indoor Indoor Indoor Indoor

unit unit unit unit
Pipe length means the length between outdoor unit and the farthest indoor unit.

- (05 - 16) -
 5-3-2. ADDRESS SETTING

SWITCHING SELECTION OF ADDRESS SETTING MODE

(1) Press and hold the “MANUAL/AUTO” button (2) Press and hold the “FAN CONTROL ” and
for 3 seconds. the “+” buttons. Whilst holding these 2 buttons,
OPERATION
press the "ACL" button.

OPERATION
indicator Pi Pi Pi
(Red)

FAN CONTROL
SET TEMP (+)

MANUAL AUTO ACL

Address setting
mode display

SELECTION AND CONFIRMATION OF CUSTOM CODE

(3) Press the “+” or “-” buttons to select the custom (4) Press the “VERTICAL AIRFLOW "button
code that matches the setting with the indoor unit. to send the code to the indoor unit.
By selecting the appropriate custom code, the
communication between the indoor unit and the Correct code:
wireless RC become possible.
INSTALLATION

INSTALLATION
Pi Pi
CUSTOM CODE
( - - - )

The initial setting is " " A

Wrong code:
No Response

ADDRESS SETTING
(5) Press the “MASTER CONTROL ” button (6) Make sure the bottom number is ‘01’. If the
to access the address setting mode. number is other than ‘01’, press the “+” or the
“-” buttons to alter.

SET "01"

(7) Press the “FAN CONTROL ” button to access (8) Press the “+” or the “-” buttons to adjust the
the address data setting mode. The address data address. The address range is between A:00
will flash once this button is pressed. and A:07 with A:00 always being the first
address to be used.
Range
00 - 07
Address data

+ : UP
- : DOWN

- (05 - 17) -
 (9) Press the “START/STOP ” button once to send (10) Indoor unit will display the indoor unit address
the information. A beeping noise will be heard if the data number on "TIMER "(GREEN) light.
command is accepted. OPERATION TIMER
(RED) (GREEN)
Pi Pi
Pi PiPiPi
continuously Flashing times of
address numbers
(Example) ADDRESS : 03
01
OPERATION LAMP ON
(RED) OFF

TIMER LAMP ON
(GREEN) OFF

* ADDRESS 0 setting will not indicate TIMER LAMP.

CHECK ADDRESS SETTING
(11) Press the “SLEEP ” button.

PiPi
CORRECT : Pi PiPiPiPiPi
INSTALLATION

INSTALLATION
PiPi
WRONG: Pi (3 sec)

COMPLETION OF ADDRESS SETTING MODE

(12) Press and hold the “MANUAL/AUTO” button for (13) Press the “ACL” button.
3 seconds.

Operation lamp After pressing the ACL button,

turns off please set the custom code
again if b,c,d setting.

MANUAL AUTO
ACL
Timer lamp keep blinks the number of times of address No.

SETTING UP EACH INDOOR UNIT

01 02 03

Repeat steps (1) through to (12). Steps (2) through to

(4) only need to carried out if the custom code is different
to the factory setting of “A”.

- (05 - 18) -
 RESET THE POWER AFTER SETTING UP ADDRESS OF ALL
INDOOR UNITS
Important
If the reset is not performed, address can not be read in normally.
After all the addresses have been set, the circuit breaker needs to be switched off for
at least 2 minutes.
After the 2 minutes has passed, power can be restored.
The set address is stored in the PCB and will remain in memory even when the power
is turned off.
However setting address is effective after power reset.
Record the address set in the indoor unit on a label, etc., and affix the label to the unit
so it can be used for after-sales service operations.

Address 0 setting will not indicate TIMER LAMP.

Once the "ACL" button is pressed on the remote controller, the MASTER CONTROL will be set in the
"AUTO MODE".
Please adjust the MASTER CONTROL to either "COOLING" or "HEATING" before trying to operate
the air conditioner.
Note : If CUSTOM CODE is set to anything other than "A" ,the remote control must be set accordingly
to the INDOOR UNIT setting.

CUSTOM CODE SETTING

INSTALLATION

INSTALLATION
ADJUSTING THE DIP SWITCH
1 INDOOR UNIT (Except Compact Wall Mounted Type)
( Factory setting)
SW5-1 SW5-2 Custom code
OFF OFF Type A
ON OFF Type B
OFF ON Type C
ON ON Type D

2 INDOOR UNIT (Compact Wall Mounted Type)

( Factory setting)
SW3-1 SW3-2 Custom code
OFF OFF Type A
ON OFF Type B
OFF ON Type C
ON ON Type D

ADJUSTING THE CUSTOM CODE

1. Press the MASTER CONTROL button for

more than five seconds to start the code
change.
2. Press the (+) or (-) button to select the
desired code. A B C D

1
3 3. Press the MASTER CONTROL button again
2 to end the code change.

Remote controller

- (05 - 19) -
 5-4. FUNCTION SETTING
5-4-1. OUTDOOR UNIT
Outdoor unit Factory setting
1 Test run (Cooling) OFF
2 Test run (Heating) OFF
SW1
3 Pump down operation OFF
4 Forced oil recovery operation OFF
1 Silent operation mode OFF
2 Forbidden OFF
SW2
3 Electric current selector switch 1 OFF
4 Electric current selector switch 2 OFF
1 Forbidden OFF
2 Forbidden OFF
SW3
3 Forbidden OFF
4 Forbidden OFF
1 Forbidden OFF
2 Forbidden OFF
SW4
3 Forbidden OFF
4 Forbidden OFF
1 Cooling capacity shift switch 1 OFF
DIP SW 2 Cooling capacity shift switch 2 OFF
SW5
3 Heating capacity shift switch 1 OFF
4 Heating capacity shift switch 2 OFF
INSTALLATION

INSTALLATION
1 Pipe length switch 1 OFF
2 Pipe length switch 2 OFF
SW6
3 Forbidden OFF
4 Forbidden OFF
1 Forbidden (System type switch) See table in 5-4-2
2 Forbidden OFF
SW7
3 Forbidden OFF
4 Forbidden OFF
1 Forbidden OFF
2 Forbidden OFF
SW8
3 Forbidden OFF
4 Forbidden OFF
1 Forbidden OFF
2 Forbidden OFF
SW201
3 Forbidden OFF
4 Forbidden OFF

- (05 - 20) -
 SWITCH POSITION
Outdoor unit control circuit board
Main - PCB

EX. OUT-1 EX. OUT-2

CN49 CN48
(BLACK) (BLUE)

LED6 LED5 LED4

SW4
SW8

SW6

SW2

LED3 LED2 LED1

ON ON ON ON

1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4
SW3
SW7

SW5

SW1

ON ON ON ON

1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4
CN50 CN52
INSTALLATION

INSTALLATION
(YELLOW) (GREEN)
EX.IN-1 EX.IN-2

P (Filter PWB)

ON

1 2 3 4

SW201

- (05 - 21) -
 5-4-2 SWITCH FUNCTION (OUTDOOR UNIT)
DIP SWITCH SETTING
(1) SW1 setting
1-1 Test run
All the indoor units connected to the outdoor unit can be test-operated by DIP switch setting.
SELECTOR SWITCH FOR TEST RUN AND NORMAL OPERATION ( . . . Factory setting)
SW1-1 SW1-2 Test Run Remarks
OFF OFF Normal operation
ON OFF Cooling test run SW1-1 / SW1-2 : OFF / OFF or ON / ON ON / OFF
OFF ON Heating test run SW1-1 / SW1-2 : OFF / OFF or ON / ON OFF / ON
ON ON Normal operation

1-2 Pump down operation

PUMP DOWN OPERATION ( . . . Factory setting)
SW1-3 Pump down operation Remarks
OFF Release
ON Operate OFF ON and be kept at ON position for more than 40 sec.
INSTALLATION

INSTALLATION
1-3 Forced oil recovery operation
FORCED OIL RECOVERY OPERATION ( . . . Factory setting)
SW1-4 Pump down operation Remarks
OFF Release
ON Operate OFF ON and be kept at ON position for more than 10 sec.

(2) SW2 setting

2-1 Silent operation mode
Noise level can be reduced using silent operation mode when the outdoor temperature falls and
high pressure decreases. (In the cooling mode only.)
SILENT OPERATION MODE ( . . . Factory setting)
SW2-1 Silent operation mode Remarks
OFF Release
ON Operate OFF ON

2-2 SW 2-2 setting forbidden

- (05 - 22) -
 2-3 SW2-3, 2-4 Electric current selector switch 1 and 2
Upper limit of electric current is set by DIP switches 2-3 and 2-4 according to the current limit.
Depending on the local power supply condition, the breaker capacity can be selected in 4 steps.
( . . . Factory setting)
SW2-3 SW2-4 Circuit breaker (A)
OFF OFF 30
OFF ON 25
ON OFF 20
ON ON 15

(3) SW3 setting : Forbidden

SW3-1, 3-2, 3-3, 3-4 setting forbidden.

(4) SW4 setting : Forbidden

SW4-1, 4-2 , 4-3 , 4-4 setting forbidden.

(5) SW5 setting

5-1 Cooling capacity shift switch
The cooling and heating capacity can be changed by using this DIP switch.
( . . . Factory setting)
INSTALLATION

INSTALLATION
SW5-1 SW5-2 CAPACITY SHIFT
OFF OFF Normal mode
OFF ON Save energy mode
ON OFF High power mode 1
ON ON High power mode 2

5-2 Heating capacity shift switch

( . . . Factory setting)
SW5-3 SW5-4 CAPACITY SHIFT
OFF OFF Normal mode
OFF ON Save energy mode
ON OFF High power mode 1
ON ON High power mode 2

- (05 - 23) -
 (6) SW6 setting
6-1 SW 6-1, 6-2 Pipe length switch
SW setting can provide the operation to supplement the loss created by the pipe length.
( . . . Factory setting)
SW 6 - 1 SW 6 - 2 Pipe length Recommended rang of L (m)
OFF OFF Standard 7.5 < L < 50
ON ON Pipe length L 50 < L < 70
The pipe lengths shown here are one of the standards. It may differ depending on the system.

6-2 SW 6-3, 6-4 setting forbidden

(7) SW7 setting

7-1 System type switch (Never change at the site)
This switch was set corresponding to the system type before shipment.
SYSTEM TYPE SWITCH ( . . . Factory setting)
SW7-1 System type
OFF Heat pump
ON Cooling only
INSTALLATION

INSTALLATION
7-2 SW 7-2, 7-3, 7-4 setting forbidden.

(8) SW8 setting : Forbidden

SW8-1, 8-2, 8-3, 8-4 setting forbidden.

(9) SW201 setting : Forbidden

SW 201-1, 201-2, 201-3, 201-4 setting forbidden

EXTERNAL INPUT AND OUTPUT

Connector Input Output

Operation Display
CN48 -----
(DC12V)

Error Display
CN49 -----
(DC12V)

OFF: Remote controller priority

CN50 -----
ON: External input priority

CN52 Cool or Heat select switch -----

- (05 - 24) -
 5-4-3. INDOOR UNIT
Indoor unit Factory setting
1 Forbidden OFF
2 Forbidden OFF
SW1
3 Room temp correct coefficient of heating 1 OFF
4 Room temp correct coefficient of heating 2 OFF
1 Room temp correct coefficient of cooling OFF
2 Forbidden OFF
SW2
3 Forbidden OFF
4 Auto restart validity / invalidity OFF
1 Forbidden (Indoor unit fan speed switch1) See table in 5-4-4
2 Forbidden (Indoor unit fan speed switch2) See table in 5-4-4
DIP SW SW3
3 Forbidden (Indoor unit fan speed switch3) See table in 5-4-4
4 External input select edge / pulse OFF
1 Forbidden (Indoor unit model code) See table in 5-4-4
2 Forbidden (Indoor unit model code) See table in 5-4-4
SW4
3 Forbidden (Indoor unit model code) See table in 5-4-4
4 Forbidden (Indoor unit model code) See table in 5-4-4
1 Wireless remote controller custom code switch 1 OFF
2 Wireless remote controller custom code switch 2 OFF
SW5
INSTALLATION

INSTALLATION
3 Forbidden OFF
4 Draft prevention setting switch OFF

SWITCH POSITION
Indoor unit control circuit board

For AU / AR types indoor unit For AS type indoor unit

CN24
CN23
CN22
SW5
CN24 CN21 SW3
CN27 SW1
CN22 CN23 SW2
SW3 SW4 SW5
SW4

SW1 SW2

- (05 - 25) -
 5-4-4 SWITCH FUNCTION (INDOOR UNIT)
DIP SWITCH SETTING
(1) SW1 setting
1-1 SW 1-1, 1-2 setting forbidden

1-2 Room temperature correct coefficient of heating.

Decide the heating temperature correct coefficient value for room temperature thermistor.
The overall room temperature increases when a larger coefficient value is used.
HEATING TEMPERATURE CORRECTION ( . . . Factory setting)
SW1-3 SW1-4 Coefficient value
OFF OFF +2 deg
ON OFF - 2 deg
OFF ON 0 deg
ON ON + 4 deg

(2) SW2 setting

2-1 Room temperature correct coefficient of cooling.
Decide the cooling temperature correct coefficient value for room temperature thermistor.
The overall room temperature decreases when a larger coefficient value is used.
INSTALLATION

INSTALLATION
COOLING TEMPERATURE CORRECTION ( . . .Factory setting)
SW2-1 Coefficient value
OFF 0 deg
ON + 2 deg

2-2 SW 2-2, 2-3 setting forbidden

- (05 - 26) -
 2-3 Auto restart validity / invalidity.
Control the auto restart function by turning this switch ON/OFF.
AUTO RESTART SETTING ( . . . Factory setting)
SW2-4 Auto restart
OFF Invalidity
ON Validity

(3) SW3 setting (Never change at the site)

3-1 Indoor unit fan speed switch
This switch can select fan speed corresponding to each model.
Cassette type
AU20 AU25 AU30 AU36 AU45 AU54
SW3-1 ON OFF OFF OFF ON OFF
SW3-2 ON ON OFF ON OFF OFF
SW3-3 ON ON ON OFF OFF OFF

Wall mounted type

AS18 AS24 AS30
SW3-1 OFF OFF ON
INSTALLATION

INSTALLATION
SW3-2 OFF ON ON
SW3-3 ON ON ON

Other model (Default)

SW3-1 OFF
SW3-2 OFF
SW3-3 OFF

3-2 SW 3-4 setting

This switch is used to select the format of external input command as shown in the table
below.
( . . . Factory setting)
External input
SW3-4
select
OFF Edge
ON Pulse

- (05 - 27) -
 (4) SW4 setting (Never change at the site)
This switch for changing the model code information of indoor unit PCB.
INDOOR UNIT MODEL CODE
Capacity
54 45 36 30 25(24) 20(22) 18 14 12 9 7
SW4-1 OFF ON OFF ON OFF ON OFF ON OFF ON OFF
SW4-2 ON OFF OFF ON ON OFF OFF ON ON OFF OFF
SW4-3 OFF OFF OFF ON ON ON ON OFF OFF OFF OFF
SW4-4 ON ON ON OFF OFF OFF OFF OFF OFF OFF OFF

(5) SW5 setting

5-1 Wireless remote controller custom code switch
Limit the type of infrared control signal which the indoor unit is controlled, in order to
prevent misoperation of indoor unit due to signal from other wirless remote controller.

REMOTE CONTROLLER CUSTOM CODE SWITCH

( . . . Factory setting)
SW5-1 SW5-2 Custom code
OFF OFF Type A
1. Press the MASTER CONTROL button for
ON OFF Type B more than five seconds to start the code
change.
INSTALLATION

INSTALLATION
OFF ON Type C 2. Press the (+) or (-) button to select the
desired code. A B C D
ON ON Type D
3. Press the MASTER CONTROL button again
to end the code change.

5-2 SW 5-3 setting forbidden

5-3 Draft prevention setting switch (only for cassette type)

Set the flap angle of cassette type unit.
Normal position Draft prevention position
DRAFT PREVENTION SWITCH
( . . . Factory setting)
SW5-4 Flap angle
OFF Normal position
Flap angle Flap angle
ON Draft prevention position 35 - 65
25 - 65

An air flow direction, by moving the flap angle horizontally,

it can prevent that a cold wind directly hits.

* If air conditioning cooling operation is performed in long

long time and a humid place, there is a possibility
that water drop may hang down from q blow-off mouth.

- (05 - 28) -
 EXTERNAL INPUT AND OUTPUT

Connector Indoor unit type Input Output Remarks

CN21 Wall mounted

CONTROL INPUT
(OPERATION / STOP)
CN27 Other type

OPERATION DISPLAY See 5-5-1

CN22
(DC12V) for details
ERROR DISPLAY
CN23 All types
(DC12V)
INDOOR UNIT FAN
CN24
STATUS DISPLAY(DC12V)
INSTALLATION

INSTALLATION

- (05 - 29) -
 5-4-5. INDOOR UNIT (COMPACT WALL MOUNTED TYPE)
Indoor unit Factory setting
1 Forbidden (Indoor unit fan speed switch1) See table in 5-4-6
2 Forbidden (Indoor unit fan speed switch2) See table in 5-4-6
SW1
3 Forbidden (Indoor unit model code) See table in 5-4-6
4 Forbidden (Indoor unit model code) See table in 5-4-6
DIP SW
1 Forbidden OFF
2 Forbidden OFF
SW2
3 Auto restart validity / invalidity OFF
4 Forbidden OFF
Jumper JM 1 Wireless remote controller custom code Connect
wire JM 2 Wireless remote controller custom code Connect

SWITCH POSITION
Compact wall mounted type indoor unit control circuit board

SW1 SW2
CN10
INSTALLATION

INSTALLATION
CN11

JM2
JM1

- (05 - 30) -
 5-4-6 SWITCH FUNCTION (COMPACT WALL MOUNTED TYPE)
DIP SWITCH SETTING
(1) SW1 setting (Never change at the site)
1-1 Fan speed setting switch
The fan speed corresponding to each model is set with the switch.
AS7 AS9 AS12 AS14
SW1-1 OFF ON OFF ON
SW1-2 OFF OFF ON ON

1-2 Model code setting switch

The model code information corresponding to each model is provided with the switch.
AS7 AS9 AS12 AS14
SW1-3 OFF ON OFF ON
SW1-4 OFF OFF ON ON

(2) SW2 setting

2-1 SW2-1, 2-2, 2-4 setting forbidden
INSTALLATION

INSTALLATION
2-2 Auto restart validity / invalidity.
Control the auto restart function by turning this switch ON/OFF.
AUTO RESTART SETTING ( . . . Factory setting)
SW2-3 Auto restart
OFF Invalidity
ON Validity

- (05 - 31) -
 JUMPER WIRE
Wireless remote controller custom code switch
Limit the type of infrared control signal which the indoor unit is controlled, in order to
prevent misoperation of indoor unit due to signal from other wirless remote controller.
REMOTE CONTROLLER CUSTOM CODE SWITCH
( . . . Factory setting)
JM1 JM2 Custom code
Connect Connect Type A
Disconnect Connect Type B 1. Press the MASTER CONTROL button for more
than five seconds to start the code change.
Connect Disconnect Type C 2. Press the (+) or (-) button to select the desired code.
A B C D
Disconnect Disconnect Type D
3. Press the MASTER CONTROL button again to
end the code change.

EXTERNAL INPUT AND OUTPUT

Connector Input Output Remarks

CONTROL INPUT
CN10
(OPERATION / STOP) See 5-5-2
OPERATION DISPLAY for details
INSTALLATION

INSTALLATION
CN11
(DC12V)

- (05 - 32) -
 5-4-7 WIRED, SIMPLE REMOTE CONTROLLER

Wired remote controller Factory setting

1 Dual remote controller setting ON
2 Dual remote controller setting OFF
3 Forbidden OFF
DIP SW
4 Model setting OFF
5 Auto changeover setting OFF
6 Memory backup setting OFF

Simple remote controller Factory setting

1 Dual remote controller setting ON
2 Dual remote controller setting OFF
3 Forbidden OFF
DIP SW
4 Model setting OFF
5 Auto changeover setting OFF
6 Forbidden OFF

SWITCH POSITION
INSTALLATION

INSTALLATION
Wired remote controller
Front case (back side)

OFF ON
1
2
3
4
5
6

ON
DIP Switch

Simple remote controller

ON

OFF
1
2
3
4
5
6

DIP switches

- (05 - 33) -
 5-4-8. SWITCH FUNCTION (WIRED, SIMPLE REMOTE CONTROLLER)
Always set the DIP SW before turning the power on.
DIP SWITCH SETTING
(1) Dual remote controller setting
Two separate remote controllers can be used to operate the same indoor unit.
Set the Dip SW 1,2 according to the following table.
( . . . Factory setting) Indoor unit
Remote controller
Number of remote Master unit Slave unit cable
1 2 3
controllers Dip SW 1 Dip SW 2 Dip SW 1 Dip SW 2 When ground
wire is necessary
1 (Normal) ON OFF
2 (Dual) OFF OFF ON ON
1 2 3 1 2 3
Master unit Slave unit

Remote controller
(2) SW 3 setting forbidden

(3) Model setting

( . . . Factory setting)
SW4 Model setting
OFF Heat Pump
INSTALLATION

INSTALLATION
ON Cooling only

(5) Auto change over validity/invalidity

Selecting auto change over validity/invalidity. Never turn it ON in the case of heat pump model.
( . . . Factory setting)
SW5 Auto change over
OFF Invalidity 1 1 : Set to OFF for "HEAT PUMP TYPE".
ON Validity 2 2 : Set to ON for "COOLING ONLY TYPE".

(6) Memory backup switch

Set to ON to use batteries for the memory backup. If batteries are not used,
all of the settings stored in memory will be deleted if there is a power failure.
This function is available for wired remote controller only. Setting for simple remote controller is forbidden.
( . . . Factory setting)
SW6 Battery backup
OFF Invalidity
ON Validity

- (05 - 34) -
 5-4-9. GROUP REMOTE CONTROLLER

Group remote controller Factory setting

1 Memory backup setting OFF
DIP SW
2 Forbidden OFF

SWITCH POSITION
Group remote controller
Front case (back side)

OFF ON
1
2

ON

DIP switch
INSTALLATION

INSTALLATION
5-4-10 SWITCH FUNCTION (GROUP REMOTE CONTROLLER)
DIP SWITCH SETTING
(1) SW1 setting
Set SW1 to ON to enable the memory backup.
If there is a power failure when the memory backup is enabled, the setting stored in the memory will be saved.
( . . . Factory setting)
SW1 Memory backup
OFF Invalidity
ON Validity

(2) SW2 setting : Forbidden

- (05 - 35) -
 5-5.EXTERNAL INPUT & OUTPUT
5-5-1. INDOOR UNIT
(1) Control input (Operation/Stop)
Indoor unit can be operated or stopped by using indoor unit PCB CN 21 (Wall mounted type )
or CN27 (other types).

*1) For Wall mounted type.

1 Input select *2) For other types
Ch 1
Dip SW3-4 Input select 1
Ch 2
OFF Edge 2
CN 21(RED) *1)
ON Pulse 3 or
CN 27(RED) *2)
Open circuit voltage : <= 5.25 (V).
2 In the case of "Edge" input Short circuit current : <
= 0.6 (mA).
Short circuit detection resistance (RON) : <
= 500 (ohm).
CONNECTOR INPUT SIGNAL COMMAND
Open circuit detection resistance (ROFF) : >
= 100 (kilo-ohm).
Ch1 of
OFF ON Operation
CN21*1) (RED)
or NOTE
CN27*2)(RED) ON OFF Stop
1. The last command has priority.
2. The wire connection shall be
separate from the power cable line.
INSTALLATION

INSTALLATION
Ch1 of On
CN21 *1) or Off
CN27 *2)

Remote On
Controller

Operation
Indoor
Stop
Unit

3 In the case of "pulse" input

CONNECTOR INPUT SIGNAL COMMAND

CN21*1) (RED) Ch1 OFF ON Operation

or
CN27 *2)(RED) Ch2 OFF ON Stop

The width of pulse must be longer than 200ms.

On

Ch1 Off

CN21 *1)
or On
CN27 *2)
Ch2 Off

Operation

Indoor
Unit Stop

- (05 - 36) -
 (2) Output
3)
CONNECTOR OUTPUT STATUS
CN22 >
= 10 V; ( <
= 15 mA) Operation
(WHITE) < Stop
= 2 V; ( 0mA )
>
= 10 V; ( < Error
CN23 = 15 mA)
(WHITE) <
= 2 V; ( 0mA ) Normal
CN24 >
= 10 V; ( <
= 15 mA) Fan run
(WHITE) < Fan stop
= 2 V; ( 0mA )
3) Output of open collector circuit.

1 Operation display
Indoor Operation +
unit 1
Stop Operation CN 22
Indicator 2 (WHITE)
-
CN 22 12V
4)
0V

2 Error display
INSTALLATION

INSTALLATION
Indoor Error +
unit 1
Normal Error CN 23
Indicator 2 (WHITE)
CN 23 12V -
4)
0V

3 Inter locking output with indoor unit fan

Indoor Fan run +
unit Indoor unit 1 CN 24
Fan stop fan status
Indicator 2 (WHITE)
-
CN 24 12V
4)
0V 4) If the indicator malfunctions, please insert
a ceramic capacitor (0.1 F ± 20%, > = 25V)
EX) Used for inter lock energize for exhaust fan. near the input port of the equipment.

(3) Parts
Following cord (service parts) is required. Please use the parts number shown below
to order the cord from your sales representative.
Usage Name and shapes Q'ty Parts No.

EXTERNAL
For output port
INPUT WIRE
1 9368778002

For control EXTERNAL

input port INPUT WIRE 1 9368779009

- (05 - 37) -
 5-5-2. INDOOR UNIT(COMPACT WALL MOUNTED)
(1) Control input (Operation/Stop)
Indoor unit can be operated or stopped by using the connector CN10(RED) on indoor unit PCB.

CONNECTOR INPUT SIGNAL COMMAND

Ch 1

CN10 OFF ON Operation 1 CN 10(RED)

(RED) ON OFF Stop 2
3

Ch1 of On Open circuit voltage : <= 5.25 (V).

CN10 Off Short circuit current : <
= 0.6 (mA).
Short circuit detection resistance (RON) : <
= 500 (ohm).
Open circuit detection resistance (ROFF) : >
= 100 (kilo-ohm).
Remote
On
Controller NOTE
1. The last command has priority.
Operation
Indoor 2. The wire connection shall be
Unit Stop separate from the power cable line.

(2) Output
INSTALLATION

INSTALLATION
5)
CONNECTOR OUTPUT STATUS

CN11 >
= 10 V; ( < = 15 mA) Operation
(WHITE) < Stop
= 2 V; ( 0mA )
+
5) Output of open collector circuit.
Operation 1 CN 11
Indicator 2 (WHITE)
Operation display -
6)
Operation
Indoor
unit 6) If the indicator malfunctions, please insert
Stop a ceramic capacitor (0.1 F ± 20%, > = 25V)
near the input port of the equipment.
12V
CN 11
0V

(3) Parts
Following cord (service parts) is required. Please use the parts number shown below
to order the cord from your sales representative.
Usage Name and shapes Q'ty Parts No.

EXTERNAL
For output port
INPUT WIRE
1 9368778002

For control EXTERNAL

input port INPUT WIRE 1 9368779009

- (05 - 38) -
 5-5-3. OUTDOOR UNIT
(1) Input
Heat and Cool switch (Heat pump type only)
"Cooling priority" or "Heating priority" can be selected by this input.
CONNECTOR INPUT STATUS
SIGNAL REMARKS

CN50 OFF Remote Controller priority

(YELLOW) ON External input priority
CN52 OFF Cooling priority CN50 need to
(GREEN) ON Heating priority be "ON".
Input1
On
CN50 1
Off CN50
2 (YELLOW)
On
CN52
Off Input2

Cooling 1 CN52
Priority
Indoor Heating
Priority
2 (GREEN)
Unit R.C.
Priority
P.C.B
Open circuit voltage : <= 5.25 (V).
Short circuit current : <
= 0.6 (mA).
Short circuit detection resistance (RON) : <
= 500 (ohm).
Open circuit detection resistance (ROFF) : >
= 100 (kilo-ohm).
(2) Output
+
INSTALLATION

INSTALLATION
1 Operation display 1
Operation CN 48
This output indicates the outdoor unit's "Operation" status. Indicator
2 (BLUE)
-
2 Error display 7) P.C.B
This output indicates the outdoor unit and connected indoor +
unit's "Normal" or "Error" status. Error 1 CN 49
Indicator
2 (BLACK)
8)
STATUS 7) -
CONNECTOR OUTPUT P.C.B
CN48 >
= 10 V; ( <
= 100 mA) Operation Operation
(BLUE) < Stop 7) If the indicator malfunctions,
= 2 V; ( 0mA ) Stop
please insert a ceramic capacitor
> CN48
CN49 = 10 V; ( <
= 100 mA) Error 12V (0.1 F ± 20%, > = 25V) near the
(BLACK) <
= 2 V; ( 0mA ) Normal input port of the equipment.
0V
8) Output of open collector circuit.
Error
Normal
CN49
12V

3 Base heater output 0V

Turn ON when the ambient temperature is low in heating mode.(3 C or less)

1 Base heater
CN 9
(Field supply)
(YELLOW)
2 AC240V,25W

(3) Parts
Following cord (service parts) is required. Please use the parts number shown below
to order the cord from your sales representative.
Usage Name and shapes Q'ty Parts No.
BASE
For base heater
port
HEATER 1 9374796014
WIRE

EXTERNAL
For input & ouput
port
INPUT 1 9368777005
WIRE

- (05 - 39) -
 5-5-4. GROUP REMOTE CONTROLLER CONVERTER
Control input
1 Input select

7 Segment Input select

00 External input function Invalidity
01 Edge
02 Pulse

It shows next page about how to setting operation.

2 In the case of "Edge" input.

CONNECTOR INPUT SIGNAL COMMAND

OFF ON All ON
CN451 CN1
ON OFF All OFF

Terminal block
CN1
Brown Open circuit voltage : 12 (V) +
1 - 5%.
CONVERTOR
INSTALLATION

INSTALLATION
CN 2 Short circuit current : <
= 2 (mA).
<
PCB

Yellow Short circuit detection resistance (RON) : = 500 (ohm).

2
Open circuit detection resistance (ROFF) : >
= 100 (kilo-ohm).
Orange
3

<Operation>
When it input GND short signal of 200ms or more to terminal 1, it transfer this operation
signal to all indoor unit on the this network. When it input GND open signal of 200ms or more
to terminal 1, it transfer this stop signal to all indoor unit on the this network.
However, it limits it when there is a change in the state.
( The operating signal has been output. GND short signal is 200ms or more
The stopping signal has been output. GND open signal is 200ms or more )

200 ms 200 ms 200 ms 200 ms

CN1 Terminal short

or
CN2 Terminal open

Operation signal output

Stop signal output

- (05 - 40) -
 3 In the case of "pulse" input

CONNECTOR INPUT SIGNAL COMMAND

CN1 OFF ON All ON
CN451
CN2 OFF ON All OFF

<Operation>
When it input GND short signal of 200ms or more to terminal 1, it transfer this operation
signal to all indoor unit on the this network.

200 ms 200 ms 200 ms

Terminal short

CN1 Terminal open

Operation signal output

When it input GND short signal of 200ms or more to terminal 2, it transfer this operation signal
to all indoor unit on the this network.
INSTALLATION

INSTALLATION
200 ms 200 ms 200 ms

Terminal short

CN2 Terminal open

Stop signal output

- (05 - 41) -
 GROUP REMOTE CONTROLLER CONVERTER how to setting operation
Setting of external input function selection.
It is neccessory to set a initial parameter setting on the group remote convertor Printed
circuit board.
An external input setting is invalid on factory setting. It set up to use the button on the main
Printed circuit board.

At first, connect indoor unit, Group remote convertor and Group remote controller.
And next, the setting begins from the state to sup ply the power supply.
Red LED lights while this conition.

Push the “MODE ” button on the group remote convertor main Printed circuit board.
It displays “ Pr ”on the 7 segment(monitor lamps).(following the fig)

The display change as following the fig.(2 seconds)

Print circuit board cord.

INSTALLATION

INSTALLATION
Parameter number
It is blinking.

It gathers information of sub print circuit board. Set value of the parameter number.
It is not possible to operate it wi th button . There are numerical values other than 0, too.

Push the [UP] or [Down] button.

Select to the code“2” as follows by using [UP] or [Down] button .
The blinking digit can be increased or decreased by the [UP] or [Down] button operating.

It gathers information of sub print circuit board.

It is not possible to operate it with button .

Push the “SELECT” key.

The blinking part turn the right side (parameter number).

- (05 - 42) -
 Set value of the parameter number.
It changes into blinking.

Select the input method of an external input with the key of “UP” or “DOWN” setting.

Set value External input function

00 External input function invalidity
01 Edge input
02 Pulse input

Push “SET” button.

When you push the “SET” button, all digit of 7 segment(monitor lamps) a blink once.

Push “MODE ” button.

7 segment(monitor lamps) blinks only when there is a setting change. Afterward, it returns
INSTALLATION

INSTALLATION
to the ordinary mode.

When there is a change in a set value , It returns to the ordinary mode.

7 segment(monitor lamps) are blinking. Turning off or the error code is displayed.

Blinking is the Red LED.

- (05 - 43) -
 5-6. INSTALLATION WORK
5-6-1. INSTALLATION THE OUTDOOR UNIT
SELECTING THE MOUNTING POSITION
WARNING
Install the unit where it will not be tilted by more than 5 .
When installing the outdoor unit it may be exposed to strong wind, fasten it securely.

Set the unit on a strong stand, such as one made of concrete blocks to minimize shock and vibration.
Do not set the unit directly on the ground because it will cause trouble.
Do not install the unit where a strong wind blows or where it is very dusty.
Install the unit so that it will not fall down or harm people.
If outdoor unit is not installed to specifications, capacity may drop because of a short-circuit.
As a result, a high pressure error may occur.
Since specified values are minimum permissible measurements, install unit after duly
considering the measurements required for installation location,piping work and maintenance.
FOR INDIVIDUALLY

h
h
H (900mm or less)
H (900mm or less)
L1 (300mm or over)

L2 (300mm or over)
300mm or over
INSTALLATION

INSTALLATION
The height (H) of the side wall should be less than 900mm.
If the height (H) of the side walls exceeds 900mm by h mm, and h mm to the space widths for L1 and L2.
H 900 : L1 300, L2 300
H > 900 : L1 > 300 + h, L2 > 300 + h
600mm or over

600mm or over

300mm or over
FOR CONTINUOUS

300mm or over
300mm or over
800mm or over

: Air discharge

ANCHOR BOLT POSITIONS

Install the anchor bolts to bear enough strength.
Anchor Bolt Position

- (05 - 44) -
 5-6-2. INSTALLATION SPACE
COMPACT DUCT TYPE

Left Right Left Right side

side Strong and durable ceiling side side (PIPE side)

Indoor unit

Inlet
air
2 1
100 mm 300 mm
or more or more Strong and
2 durable floor
1 When drain pump is used, leave the 30 mm 30 mm
100 mm 300 mm or more or more
space required for service and or more or more
maintenance (Refer to 5-6-6. DRAIN
PUMP UNIT)
2 When drain hose is connected, the required
dimension is 150mm or more.

LOW STATIC PRESSURE DUCT TYPE / DUCT TYPE

INSTALLATION

INSTALLATION
300 mm 150 mm
or more or more

COMPACT CASSETTE TYPE

Strong and durable ceiling
250 mm
or more

1,000 mm
1,000 mm
or more
2,300 mm or more
or more Obstruction

Floor

- (05 - 45) -
 CASSETTE TYPE
You can select 2-way setting
Strong and durable ceiling
(A) Standard setting (B) Slender setting

AU20 - 30

200 mm
235 mm

or more
1,000
2,300 1,000 AU36 - 54
or more
or more or more

250 mm
285 mm

or more
Obstruction
Floor

COMPACT WALL MOUNTED TYPE

60 mm or over
Left side
50 mm or over Right side
50 mm or over
INSTALLATION

INSTALLATION
1500 mm
or over

2300 mm or over

WALL MOUNTED TYPE

60 mm or over
Left side Right side
50 mm 200 mm
or over or over

1500 mm
or over

2300 mm or over

- (05 - 46) -
 CAUTION
WARNING
Install at a place that can withstand the weight of the indoor and outdoor units and install positi-
vely so that the units will not topple or fall.

CAUTION
Do not install where there is the danger of combustible gas leakage.
Do not install the unit near a source of heat, steam, or flammable gas.
If children under 10 years old may approach the unit, take preventive measures so that they
cannot reach the unit.

Decide the mounting position with the customer as follows:

Install the indoor unit on a strong wall ,floor,ceiling which is not subject to vibration.
The inlet and outlet ports should not be obstructed. The air should be able to blow all over the room.
Do not install the unit where it will be exposed to direct sunlight.

Install the unit where the connection pipe can be easily installed.
Install the unit where the drain pipe can be easily installed.
INSTALLATION

INSTALLATION
Take servicing, etc. into consideration and leave the spaces. Also install the unit where the filter can be removed.

Install the indoor unit where vibrations and noise are not amplifired.

When Installing the unit on the floor, make sure that there is plently of space a around the inlet port.

- (05 - 47) -
 5-6-3. PIPING CONNECTION
CAUTION
Use the designated size (diameter & thickness) of refrigerant pipes.
Those pipes purchased locally may contain dust inside. Please blow out the dust by
dried inert gas when using.
Be careful to avoid the dust or water falling into the pipe when performing piping
process and piping installation.
When processing the pipe, make the number of bending portion as few as possible,
and the bending radius as large as possible.
To process the branch, do not use T-shaped pipe, which causes a uneven refrigerant
flow. Use the optionally available standard branch kit.

T - tube Separation Tube Header

Install branch kit in the direction specified in installation manual.

Horizontal Vertical
INSTALLATION

INSTALLATION
NG

o or
OK
30
NG

NO GOOD

Separation tube

Header
Gas pipe
Outdoor b1 Vertical
A unit side line
Horizontal line
Horizontal
line
Brazing point
a1 VIEW A b2
H1
VIEW B
Liquid pipe
Outdoor H1, H2 = 0mm to 10mm
B unit side Horizontal line
a1, a2 : 0° to 1°
Brazing
b1, b2 : -10° to 10°
point a2
H2

If the diameter of the required pipe is different from the branch unit, either cut it out or
use reducer.

- (05 - 48) -
 CAUTION
Keep the permissible length of every piping limitation to prevent a defect or cooling failure.
When replacing the unit, never use piping which has been used for previous installations.
Only use the new piping.
Welding
While welding the pipe, be sure to blow dry nitrogen gas through the pipes.
If not used, it will be caused to damage for compressor and clog the strainer and
electronic expansion valve.

0.02MPa

Pressure hose

Bello ws v alve

Nitr og en gas
Rubber stopper

Example) Inside state of welding pipe section

INSTALLATION

INSTALLATION
Nitrogen Gas used Nitrogen Gas used but not sufficient Nitrogen Gas does not used
(Oxygen gas still inside the pipe)

The pipes vibrate, expand, and contract during operation, so if loads are concentrated in one area,
it could cause cracks in the pipes. Provide the pipes with supports every 2 to 3m.
Make sure to insulate the refrigeration pipes separately with ample thickness of
heat-resistant polyethylene form etc. For the connecting portion, apply the enough
insulation to avoid any gap.

- (05 - 49) -
 FLARE PROCESSING

(1) Cut the connection pipe with pipe cutter so that the pipe is not deformed.
(2) Holding the pipe downwards so that cutting cannot enter the pipe and remove the burrs.
(3) Remove the flare nut from the indoor unit pipe and assemble as shown in Table 1 and insert
the flare nut onto the pipe, and flare the pipe with a flare tool.
(4) Use either a flare tool for R410A or conventional flare tool. Flare processing dimensions differ
according to the type of flear tool. Be careful. When using a conventional flare tool, be sure to
secure "Dimension A" by using a gage for size adjustment.
(5) Check if the flared part is spread uniformly and that there are no crack. Finally, check the
"Dimension D" to confirm that the flared part was produced in correct size.

Outer dia- Dimension A (mm) Dimension D

meter of Flare nut (mm) Tightening
Flare tool Flare tool for R22
( )
pipe d width L1 tolerance torque
for R410A +0.0 mm
(mm) (mm) (Clutch type) (Clutch type) -0.4 mm
(N·m)

6.35 17 0 to 0.5 1.0 to 1.5 9.1 16.0 to 18.0

9.52 22 0 to 0.5 1.0 to 1.5 13.2 30.0 to 42.0

12.70 26 0 to 0.5 1.0 to 1.5 16.6 49.0 to 61.0
15.88 29
INSTALLATION

INSTALLATION
0 to 0.5 1.0 to 1.5 19.7 63.0 to 75.0
19.05 36 0 to 0.5 1.0 to 1.5 24.0 90.0 to 110.0

Flare nut width

L1 D

Die d
A

d
Pipe

- (05 - 50) -
 Separation tube installation

Outdoor unit or Indoor unit or

Refrigerant branch kit Refrigerant branch kit

Install the separation tube so that it branches either horizontally or vertically.

Horizontal Vertical

or
NG
OK

30
NG

Use the pipe cutter to cut at the location which matches the piping size when the
piping size is different.
INSTALLATION

INSTALLATION
15 mm or more Pipe cutter

stopper

Distance between separation tubes

Main pipe 0.5m or more To indoor unit 0.5m or more To indoor unit

To indoor unit
Caution
Leave the distance 0.5m or more for straight part to separation tube.
(To prevent the outdoor unit mulfunction and generation of refrigerant noise)

Heat insulation installation (For UTR-BP054X)

After brazing the pipes, use the supplied insulation to insulate them.
1) Remove the protective sheet from the double-stick that is affixed to the heat insulation.

- (05 - 51) -
 2) Be sure to install the tape (accessory) in each heat insulation to the 4 positions as shown in
the following figure.

3) Use tape (locally procured) to seal the seam so that there will be no gap at the junction between
the aforementioned heat insulation and the heat insulation on the local piping.
Contact each other Contact each other Tape (locally procured) Tape (locally procured)
Insulation (locally procured)

Insulation (locally procured)

Tape (locally procured)
Contact each other

CAUTION
As with the gas pipes, fully insulate the liquid pipes. Unless they are thermally insulated, water condensation can
cause accidents or reduction in performance.

After installing the heat insulation, if you worry about possible condensation, please cover the heat insulation
onto the gas pipe from top at field installation.
INSTALLATION

INSTALLATION
[Add the standard of heat insulating meterial]
When using, the environment temperature shoud be higher than 35 and humidity over 85%.
When using, the environment temperature shoud be higher than 25 and humidity over 90%.

Installation example

Heat insulation (locally procured)

Heat insulation installation (For UTR-BP54U)

After brazing the pipes, use the supplied insulation to insulate them.
Remove the protective sheets from the adhesive strips attached to the supplied heat insulation.
Fasten the heat insulation to the separating tube using binders in two locations.
If the separation tube is not covered, install the heat insulation over the entire surface of the separating
tube.
Fold heat insulation
Fasten using binders

Remove protective sheets

CAUTION
Make sure that the pipe is covered completely by the insulation, not exposing to air. Inadequate heat insulation may cause
condensation.
If the temperature and the relative humidity around the cooling pipes are expected to exceed 30 C (86 F) and 80%RH, increase
the thickness of the heat insulation for the pipes to at least 20mm (13/16"). Otherwise, condensation might from on the surface
of the insulation.

- (05 - 52) -
 Header installation
Caution
Separation after header is not allowed.

Outdoor Header
unit

Indoor Indoor Indoor Indoor Indoor Indoor Indoor

unit unit unit unit unit unit unit

Outdoor Header
unit

Indoor Indoor
unit unit

Indoor Indoor Indoor Indoor Indoor

unit unit unit unit unit
INSTALLATION

INSTALLATION
Piping connection
(1) When connecting the connection pipes from the indoor units, connect them to the header branch
pipes in the order 1, 2, 3, etc.

Gas pipe Liquid pipe

1
2 1
3 2
4 3
4
5 Outdoor unit or 5
Outdoor unit or 6
separation tube 6
separation tube

(2) Use a pipe cutter to cut at the location that matches the piping size.
Be sure to cut the piping off at least 15 mm from the piping stopper
If the piping is cut too short, leaks can occur. After cutting the piping off, be sure to deburr it.
Make sure that dirt or water does not enter the piping when connecting the piping.

Pipe cutter 15 mm
or more

(3) Attach a plugging pipe provided if there is no piping connected at the headers.

Plugging pipe

- (05 - 53) -
 Installation
Install the header so that it branches horizontally.
Use a level to make sure that the header is positioned as shown in following figure,
and then, secure it in place.

Gas pipe Liquid pipe

Outdoor Horizontal Outdoor Horizontal
A unit side B unit side
line line
Brazing
Brazing 1 point 2
point H1 H2
Vertical
line
1 H1= 0 mm ~ 10 mm H2= 0 mm ~ 10 mm
Horizontal ( : 0° ~ 1°) ( 2: 0° ~ 1°)
line 1 2
VIEW A 1: -10° ~ 10° VIEW B 2: -10° ~ 10°

Heat insulation installation

After brazing the piping, attach heat insulation.
Remove the protective paper for the tape on the heat insulation for the header and attach it.
Tighten by using binders in five locations.
Binder
INSTALLATION

INSTALLATION
Cover the plugging pipe with heat insulation and seal with tape.

Tape (Procure locally)

Plugging pipe
Heat insulation for header
Heat insulation for plugging pipe
Heat insulation for
plugging pipe

- (05 - 54) -
 EV KIT INSTALLATION
EV kit selection
Dimension Applicable to indoor unit
Model name of EV kit
(H x W x D) (mm) with following model code
UTR - EV2A L 83 x 288 x 45 <30

UTR - EV3 L 97 x 290 x 50 >30

CAUTION (for UTR - EV2A L)

Be sure to connect the EV KIT as shown in the following figure. Otherwise, the EV KIT and indoor unit could be damaged.
Horizontal direction Rotation direction
Install the EV KIT so that the arrow on the label is within the range Install the EV KIT so that the arrow on the label is facing up.
shown in the figure.
a b
OK
NG
OK

UP
View A
A UP
Liquid pipe EV KIT cord
(indoor unit side)
EV KIT cord
NG
Liquid pipe
(indoor unit side) 0° < a < 90° -90° < b < 90°

CAUTION (for UTR - EV3 L)

INSTALLATION

INSTALLATION
Be sure to connect the EV KIT as shown in the following figure. Otherwise, the EV KIT and indoor unit could be damaged.
Horizontal direction
Install the EV KIT so that the arrow on the label is within the range shown in the figure.
Liquid pipe
(indoor unit side) a
NG
O
K

EV KIT cord
UP

0° < a < 180°

EV kit installation
(1) Connect the flare nut side of the EV KIT to the liquid pipe of the indoor unit.

To Indoor To Outdoor
unit unit

When the pipe length is extended UTR-EV2A L

Flare nut Union
(supplied) (supplied)

To Indoor To Outdoor
unit unit

Pipe length L
(Refer to NOTES.)

- (05 - 55) -
 NOTES (for UTR - EV2A L)
[For wall mounted type indoor units]
The EV KIT cannot be installed to the rear of compact wall mounted type indoor units. Install the EV KIT to the piping from the left or right side
of the indoor unit as shown in the following figure.
Refer to the table for the maximum pipe length of L, L1, L2. EV KIT
Pipe cover
L L1 L2
Compact wall mounted type 1.0 m 0.7 m 1.2 m
Maximum
Wall mounted type 0.8 m 0.2 m 1.0 m Maximum
length L2
length L1
Use a pipe cover with a width of 100 mm or more.

[For duct type indoor units (AR25UFAAR only)]

Maximum pipe length of L is 0.9 m.
[For other indoor units]
Maximum pipe length of L is 1.2 m.

NOTES (for UTR - EV3 L)

[For wall mounted type indoor units]
Maximum pipe length of L is 1.1 m. EV KIT
(L1=0.5 m , L2=1.3 m) Pipe cover
When using a pipe cover, make sure that the width x height of the cover
is 140 mm x 50 mm,or 100 mm x 100 mm or greater.
Maximum
[For duct type indoor units (AR36UFAAR, AR45UFAAR)] length L1
Maximum
length L2
Maximum pipe length of L is 1.2 m.

[For other indoor units]

Maximum pipe length of L is 1.5 m.
INSTALLATION

INSTALLATION
(2) Connection pipe
When the flare nut is tightened properly by your hand, Holding spanner Table
hold the body side coupling with a separate spanner , Body side Pipe Tightening torque
then tighten with a torque wrench.
6.35 14.0 to 18.0 N m
(1/4")

Torque 9.52
33.0 to 42.0 N m
wrench (3/8")

UTR - EV2A L
(3) Connect the wire
Wrap the tube (long) around the EV KIT cord from the end of the cord to
the indoor unit control box so that the cord will not be exposed, and then
fasten both ends of the tube with the binders (small). Binder (small)
(Cut the tube (long) if it is too long and will enter the indoor unit control box.)
When the pipe length was extended
Use the supplied wire to extend the length of the EV KIT cord.
Wrap the tube (short) around the connection, and then fasten both ends with
the binders (small) as shown in the figure to the right.
Connect the EV KIT cord to the indoor unit. (Refer to the INSTALLATION When the pipe length was extended

MANUAL of the indoor unit.) Tube (short) CONNECT Binder (small)

Fasten the EV KIT cord to the piping, etc., with the binders (medium)
to remove any slack in the cord.
Wire (supplied) EV KIT cord

(4) Finishing
Before performing this section, perform a sealing test. (Refer to
the INSTALLATION MANUAL of the outdoor unit.)
Coupler heat insulation
WARNING Coupler heat insulation
Binder (large)
(included with the
Make sure that the pipe is covered completely by the insulation, not EV KIT indoor unit)
exposing to air. Inadequate heat insulation may cause condensation.
Indoor
Put all the six heat insulating seals around the EV KIT. unit
Fix with the binders (large).
No gap No gap
Insulate the EV KIT connecting part.
Heat insulating
seal (6 pieces)

- (05 - 56) -
 AIR TIGHT TEST
After the piping has been installed, perform a sealing test.
Charge the piping with nitrogen to within the sealing test pressure (4.2 MPa).
After 24 hours, check that the pressure has not fallen.
Make sure to add the pressure to both Gas pipe and Liquid pipe.
Perform the leak test on all flared and brazed parts.
Note: When the ambient temperature changes 5 deg. ,the test pressure changes 0.07MPa.

VACUUM PROCESS
CAUTION
Do not purge the air with refrigerant but use a vacuum pump to remove air from the indoor unit
and connection pipes!

(1) Remove the cap, and connect the gauge manifold and the vacuum pump to the charging
valves by the service hoses.
(2) Vacuum the indoor units and the connecting pipes until the pressure gauge indicates –76cmHg.
Be sure to vacuum from both 3-way valves.
(3) When –76cmHg is reached, operate the vacuum pump for at least 1 hour.
(4) If necessary, add the refrigerant for the appropriate amount after the vacuum process is completed
(Refer to next page "ADDITIONAL CHARGE").
(5) Disconnect the service hoses and fit the cap to the charging valve.
INSTALLATION

INSTALLATION
(6) Remove the blank caps, and fully open the spindles of the 3-way valves with a hexagon wrench.
(7) Tighten the blank caps of the 3-way valves to the specified torque.

Blank cap Charging cap

Liquid pipe (3-way valve) 20.0 to 25.0 N·m 12.5 to 16.0 N·m

Gas pipe (3-way valve) 35.0 to 40.0 N·m 12.5 to 16.0 N·m

Check valve
Auxiliary pipe assembly
Operation Check valve
mode pressure Gauge manifold

Cooling High Pressure

Heating Low Pressure
Hexagon
wrench
Blank Vacuum
Charging cap pump
cap

- (05 - 57) -
 ADDITIONAL CHARGE
Always add the refrigerant for the appropriate amount.
Refer the additional refrigent charge amount to item 5-1-4 "ADDITIONAL CHARGE
CALCULATION".
Either larger or smaller refrigerant charge amount leads to the cause of trouble.
For after service purpose , the added refrigerant charge amount and the calculation
shall be memorized.

CAUTION
When moving and installing the air conditioner,do not mix gas other than the specified refri-
gerant inside the refrigerant circuit.
When chaging the refrigerant ,always use an electronic balance for refrigerant chaging
(to measure the refrigerant by weight).

Add refrigerant from the charging valve after the completion of the work.

The maximum length of the piping is 70 m (actual pipe length). If the units are further apart
than this, correct operation can not be guaranteed.
INSTALLATION

INSTALLATION
R410A

Scale

When you use scale, please use electronic scale with few errors.

- (05 - 58) -
 5-6-4. ELECTRICAL WIRING
Always perform the installation referring to the installation instruction sheet, based on your local
regions related laws and regurations,and electric company

WARNING
Before starting work, check that power is not being supplied to the outdoor unit.
Connect the connection cable firmly to the terminal board. Imperfect installation
may cause a fire.
Always fasten the outside covering of the connection cable with the cord clamp.
(If the insulator is chafed,electric leakage may occur.)

Always connect the ground wire.

Match the terminal board numbers of outdoor unit side with those of the indoor side.
Improper connection will lead to malfunction or cause fuse blow.

Connect wiring to the terminals

A. For solid core wiring (or F-cable)
Cut the wire end with a wire cutter or wire-cutting pliers, then strip the
insulation to about 25 mm to expose the solid wire. A. Solid wire
INSTALLATION

INSTALLATION
Using a screwdriver, remove the terminal screw(s) on the terminal board.

25 mm
Strip
Loop
Using pliers, bend the solid wire to form a loop suitable for the terminal screw.
Shape the loop wire properly, place it on the terminal board and
tighten securely with the terminal screw using a screwdriver. Insulation

B. For strand wiring

Cut the wire end with a wire cutter or wire-cutting pliers, then strip the insulation
to about 10 mm to expose the strand wiring. B. Strand wire
Round terminal
Using a scre wdriver, remove the terminal screw(s) on the terminal board.
10 mm
Strip

Using a round terminal fastener or pliers, securely clamp a round terminal

to each stripped wire end.
Position the round terminal wire, and replace and tighten the terminal screw
using a screwdriver.

Screw with
Screw with special washer
special washer Round
terminal
Round Wire Terminal
terminal board
Wire
Terminal block

- (05 - 59) -
 Fix the connection cable and power supply cable at the cord clamp
After passing the connection cable and power supply cable through the
insulation tube, fasten it with the cord clamp.
Use VW-1,0.5 to 1.0mm thick, PVC tube as the insulation tube.

OUTDOOR UNIT
(1) Remove the terminal cover of the outdoor unit, and connect the connection cable and
the power supply cable to the terminal board.
(2) Fasten the connection and power supply cable with the cord clamp, and install the terminal cover.

Terminal board

Terminal cover
INSTALLATION

INSTALLATION
L N 1(L) 2(N) 3
POWER CONNECTION

Insulation tube
(V·W –1, 0.5 to 1.0 mm thick PVC tube)

Power Connection
supply cable
cable

- (05 - 60) -
 INDOOR UNIT
EV KIT cord EV KIT cord

Remote controller cable

(optional parts)
Terminal

3
3

2
Outdoor unit

1
1
Connection cable

1 2 3
L (N)
1 2 3
• L• (N)
Breaker
220 - 240V Connection cable
1 50HZ EV EV EV

Indoor unit

Wired remote controller

(optional part)

CAUTION
Never bundle the power supply cable or connection cable with remote controller cable together.
Bundling these cables together will cause misoperation.
The power source capacity must be the sum of the air conditioner current and the current of other
electrical appliances.When the current contracted capacity is insufficient,change the contracted
INSTALLATION

INSTALLATION
capacity.
When the voltage is low and the air conditioner is difficult to start, contact the power company
to raise electrical voltage.

WARNING
The rated voltage of this product is 220-240V A.C.50 Hz.
Before turning on verify that the voltage is within the 198 V to 264 V range.
Always use a special branch circuit and install a special receptacle to supply power to the air
conditioner.
Use a circuit breaker and receptacle matched to the capacity of the air conditioner.
Perform wiring work in accordance with standards so that the air conditioner can be operated
safely and positively.
Install a leakage circuit breaker in accordance with the related laws and regulations and electric
company standards.

INSTALLING THE RECEIVER UNIT FOR DUCT TYPE INDOOR UNIT

stopper
Screw
(standard Cover
Hook metal
part)
ceiling
Insulation
Receiver Connect
unit
Cover
Open the hole
Tapping screw Hang to
Hole profile
Tapping screw (standard part) the hook
(60mm x 120mm)
(large:standard part) Receiver unit

Fix Hook metal to Receiver Open the hole to ceiling

Slide and set the cover
1 unit by Screw putting in 2 Install Reciever unit by screw 3 to Receiver unit
Insulation. Connect the connector

- (05 - 61) -
 5-6-5. DRAIN PROCESSING
OUTDOOR UNIT
Please connect the hose when the processing of the drain water of the installation in the room
etc. is necessary by the following method.
Since the drain water flows out of the outdoor unit during heating operation,
install the drain pipe (STANDARD PARTS) and connect it to a commercial 16mm hose.
(Heat pump model)
When installing the drain pipe, plug all the holes (• holes at seven places) other than the drain
pipe mounting hole in the bottom of the outdoor unit with putty so there is no water leakage.
Make a space between bottom plate and the ground for the drain water.
Create ditch for the drain water around the outdoor unit if necessary.
Make sure that the drain hose is not lifted up, winding, or its end is not in the water.
INSTALLATION

INSTALLATION
Drain pipe mounting hole

Bottom plate Bottom plate

Hose

Drain pipe

Drain pipe

CAUTION

Installation in cold regions.

Install the drain hose so that it will not be packed or frozen.

- (05 - 62) -
 INDOOR UNIT
NOTE : Install the drain pipe.

Install the drain pipe with downward gradient(1/50 to 1/100) and so there are
no rises or traps in the pipe.
Use general hard polyvinyl chloride pipe (VP25) and connect it with adhesive
(polyvinyl chloride) so that there is no leakage.
When the pipe is long, install supporters.
Do not perfrom air bleeding.
Always heat insulate the indoor side of the drain pipe.

COMPACT DUCT TYPE Drain port : O.D 26mm

A. CEILING SETTING
Outlet air Drain hose
flow Trap Rise

OK NO NO
Arrange the drain hose
lower than this portion

Supporter

Air bleeding
INSTALLATION

INSTALLATION
1.5 to 2 m
(5 to 6.5 ft)

B. FLOOR STANDING SETTING

OK NO NO

CAUTION
Connect the drain hose so that the control box cover can easily be removed for servicing
when necessary.
In order to prevent water from leaking into the control box, make sure that the piping is
well insulated.
After finishing the piping, the drain hose installation and the wiring, seal the holes in the wall.

- (05 - 63) -
 LOW STATIC PRESSURE DUCT TYPE / DUCT TYPE
Outlet Drain port : O.D 38mm
air Drain Trap Rise
flow hose

OK NO NO
Arrange the drain hose
lower than this portion.

Supporter
Air bleeding

1.5 to 2 m

The outside diameter of the drain port is 38 mm. Use a suitable drain hose.
There is a drain port on both the left and right sides. Select the drain port to match
the local conditions

Drain port Drain cap Nylon fastener

INSTALLATION

INSTALLATION
Drain hose

CAUTION
Always check that the drain cap is installed to the unused drain port and is fastened with the
nylon fastener. If the drain cap is not installed, or is not sufficiently fastened by the nylon
fastener, water may drip during the cooling operation.

COMPACT CASSETTE TYPE

Supporter Drain port : O.D 32mm

Rise
Trap
1.5 to 2 m
Air bleeding 150 mm or less

Max. 400 mm

When desiring a high drain pipe height, raise it up to 400 mm or less from the ceiling
within a range of 150 mm from the body.
A rise dimension over this range will cause leakage.

- (05 - 64) -
 CASSETTE TYPE Drain port : O.D 32mm

Supporter

Rise
Trap
1.5 to 2 m
Air bleeding 150 mm or less

Max. 800 mm

When desiring a high drain pipe height, raise it up to 800 mm or less from the ceiling
within a range of 150 mm from the body.
A rise dimension over this range will cause leakage.

COMPACT WALL MOUNTED TYPE Drain hose is attached.

Check the following :

Drain
Indoor unit hose
drain hose
Drain cap
INSTALLATION

INSTALLATION
Insert the drain cap and drain hose
until it butts against the drain port.
Lifted up
Saddle Wave End in water

For left outlet piping, cut off the piping outlet

cutting groove with a hacksaw.

Remove the drain cap by pulling at the projection

Drain cap at the end of the cap with pliers, etc.
Under cover
Indoor unit drain hose

WALL MOUNTED TYPE Drain hose is attached.

Check the following:

Left side GOOD BAD BAD BAD
Drain hose

Drain hose

Right side
Drain cap
Drain hose
Lifted up
Saddle Wave End in water

Drain cap
Insert the drain cap until it
butts against the drain port. Insert the drain hose until it
butts against the drain port.

- (05 - 65) -
 DRAIN PIPE INSULATION
Please confirm water is injected into Drain pan of the indoor unit, and drain is done normally
when the connection of Drain hose is completed.
Please check whether there is water leak part in the Drain piping.
Please insulate it from heat by the heat insulator of enough thickness so that there is no be
dewy when the confirmation ends. It causes the water leak like being imperfect.

Drain hose
Drain hose insulation
insulation
Unit
Unit

Drain hose
0 mm
Drain hose

Drain hose insulation

Drain hose
insulation
Unit
Unit
INSTALLATION

INSTALLATION
Drain cap 0 mm * Please roll the heat insulator also on the
Drain cap side.(some models)

Outside
wall cap
Saddle
Sealer
putty

Wall (Outdoors)
Pipe
* Please cover the space with the putty etc. when
you put out Drain hose from the wall.

CENTRAL DRAIN PROCESSING

When converging multiple drain pipes , install according to the procedure shown below.

Select converging drain pipes whose gauge is suitable for the operating capacity of the unit.

- (05 - 66) -
 5-6-6. DRAIN PUMP UNIT
MODEL : UTZ-PX1BBA
Specifications
Unit Specifications
Height of drain up mm Maximum 1000
Power source - 220 - 240V, 50 - 60Hz
Power input (230V, 50Hz/60Hz) W 12 / 10.8
Current (230V, 50Hz/60Hz) mA 114 / 92
Dimensions (H x W x D) mm 176 x 178 x 154
Weight kg 2.5
Connection pipe diameter - VP25 (I.D. 25mm, O.D. 32mm)
Direction of pipe connection *1 - 360°
Angle of pipe connection *2 - 0° (Horizontal) - 90°(Vertical)
Control method - Control board of Indoor unit
Safety device - Float switch, Thermal fuse
*1 Direction of pipe connection *2 Angle of pipe connection
INSTALLATION

INSTALLATION
Application indoor units
Type Model
Compact Duct AR07, AR09, AR12, AR14, AR18, AR22

Mounting position (Unit : mm)

Strong and slide ceiling

Connected drain pipe (VP25)

Indoor unit
(I.D. 25mm; O.D.32mm)
Left Right 107

Max.1000
side side
217

176
51

100 or more 470 or more

Front view Front view
Drain pump unit
597*3/886*4 167
154
38

560*3/850*4

*3: AR07,09
*4: AR12,14,18, 22 Leave the space required to service the unit.
127

Set a maintenance hole near the drain pump unit.

This product is specially designed for ceiling concealed
installation of the indoor unit.
It cannot be connected when it is installed on the floor.
390

720
575

AIR
178

Top view

- (05 - 67) -
 Installing drain pump unit
Use the tapping screw to install
the drain pump unit to the indoor unit.

When there is no screw hole

Puncture holes at the following position and
then install.

20±0.3
Hole Diameter : 3.3

105±3
Hose band
15±3

Joint hose

Thread the hose band through the joint hose,

and insert it until it touches the drain pump
unit and indoor unit.
INSTALLATION

INSTALLATION
Ceiling Level meter

Air
Level meter
10 mm
or less

10 mm
or less

GOOD BAD
GOOD BAD

Installing hose

Example of wrong construction

Vertical
Downward BAD
Upward BAD
Bend radius is
60mm or more
Max. 1m

Trap

Horizontal BAD
Downward gradient of BAD
1/50 to 1/100
Vertical loop
Part : Hose

- (05 - 68) -
 Installing pipe

Gap of 1.5-2m Air bleeding Rise

Supporter
Locally arranged pipe

VP25
Max. 1 m
Trap
[O.D 32mm]
or more

BAD

VP30 or more [O.D 38mm or more]

Max.1 m
INSTALLATION

INSTALLATION
Observe the following procedures to construct centralized drain pipe fittings.

Electrical wiring

Control box cover Drain pump wire

(Connector:Blue)

Drain pump unit

Control box

Indoor unit
Float switch wire
Circuit board (Connector:Red)

To indoor unit circuit board

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 5-6-7. TEST RUN
TEST RUN METHOD
The procedures for performing the test run are desribed below.
(Supply power for at least 4 hours before starting operation in the winter.)

(1) Perform a test run (cooling) separately for each indoor unit that is connected to the refrigerant system,
and check the operation in order to confirm there is no problem on the wiring connection and the address.

(2)Perform a test run (cooling) simultaneously for all indoor units are connected to the refrigerant system,
and check the operation in order to confirm all installation is completed.

Test operation using circuit board (Outdoor unit)

If the test operation is to be done for cooling operation, set DIP switch (SW1) to the corresponding
system type as shown in the Table. After all the process have been completed, perform a test run.

SW 1 - 1 SW 1 - 2

NORMAL OPERAT- OFF OFF

ING MODE ON ON
COOLING MODE ON OFF
HEATING MODE OFF ON
INSTALLATION

INSTALLATION
Test operation using remote controller
Short two metallic pieces in the remote controllers test run frame while the indoor unit is running.
To stop the test run, push START/STOP button of the remote controller.
When the air conditioner is being test run, the OPERATION and TIMER indicators flash slowly
at the same time.

CHECK LIST
Check item Checking Method Standard
After operating the indoor unit, Check operation sound and
1 Outdoor unit LED 3 :flushing
the compressor operates? the LED of outdoor unit PCB.

High pressure and low pressure Cooling : Low pressure 0.7 to 0.9MPa (approx.)
2 Confirm with a pressure gauge
are normal? Heating : High pressure 2.2 to 2.7 MPa (approx.)

Check that there is a difference Cooling : Below -10 C (approx.)

Intake and outlet air Temperature
3 between the intake and outlet air Heating : Above 15 C (approx.)
of indoor unit are normal?
temperatures.

Water is drained from drain hose Check operation sound of the

4 or by the drain pump smoothly? drain pump.
(Only for cooling mode) Confirm water is draining.

Check the refrigerant flows to the

Expansion valve of the stopped heat exchanger.(Wait at least 5 Cooling : No refrigerant flow
5 indoor unit are normal? minutes after the indoor unit has Heating : A little refrigerant flow
stopped before checking the
refrigerant.)

- (05 - 70) -
 5-7. STANDARD ACCESSORIES
The following installation parts are supplied. Use them as required.

5-7-1. OUTDOOR UNIT

MODELS: AJ A54L, AJ A54J, AO 54U, AO 54F
Description Q'ty Application Description Q'ty Application

Auxiliary pipe assembly Drain pipe For outdoor unit drain

For connecting the piping 1 piping work
(Ø19.05) (Heat pump model only)
1
Drain cap
For outdoor unit drain
piping work
7
(Heat pump model only)
INSTALLATION

INSTALLATION

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 5-7-2. INDOOR UNIT
COMPACT CASSETTE TYPE
GRILLE ACCESSORIES

Name and Shape Q’ ty Name and Shape Q’ ty Name and Shape Q’ ty

Installation Remote Bolt
template controller
1 1 4

Coupler heat Remote Washer

insulation controller
2 holder 1 4

Special nut 4 Tapping Blower cover insulation

(M10) (large) screw
3 2
4
(small)

Battery

2
INSTALLATION

INSTALLATION
CASSETTE TYPE
Name and Shape Q ty Name and Shape Q ty Name and Shape Q ty Name and Shape Q ty
Installation Remote Battery Remote
template controller controller
1 1 2 holder 1

Coupler heat Tapping Blower cover insulation Hook wire

insulation screw
2 2 2 2

Special nut 4 Binder 2 Reducer

(large) (large) (for AU30 only)
(M10)
1
4 1
(small) (small)

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 COMPACT DUCT TYPE

Name and Shape Q ty Name and Shape Q ty Name and Shape Q ty Name and Shape Q ty Name and Shape Q ty
Installation Special nut A (M10) Remote Receiver unit Binder 2
template (small)
1 (large flange) 4 controller 1 1
4
(large)
Hanger Special nut B (M10) Remote Hook metal Filter 2
(small flange) controller 1 1 (AR7/9)
4 4
holder 3
(AR12/14
18/22)
Tapping screw Coupler heat Battery Cover
( 4X10) insulation 1 2 1
10
(large)

Drain hose insulation Coupler heat Screw Tapping screw

1 insulation 1 1 (large) 2
(small)

LOW STATIC PRESSURE DUCT TYPE / DUCT TYPE

Name and Shape Q’ ty Name and Shape Q’ ty Name and Shape Q’ ty Name and Shape Q’ ty Name and Shape Q’ ty
INSTALLATION

INSTALLATION
Installation Special nut A (M10) Remote Receiver unit Screw 2
template (large ßange) controller (Ø3×12)
1 4 1 1
2
(Ø4×20)
Hanger Special nut B (M10) Remote Hook metal 1
(small ßange) controller (Ø4×12)
4 4 holder 1 1
1
(Ø4×10)
Binder Coupler heat Battery Cover Adopter
insulation Ø6.35-Ø9.52
5 (large) 1 2 1

1
Drain hose insulation Coupler heat Insulation
insulation AR30 type only
1 (small) 1 1

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 COMPACT WALL MOUNTED TYPE
Name and Shape Q ty Name and Shape Q ty Name and Shape Q ty Name and Shape Q ty
Wall hook bracket Cloth tape Remote controller Remote controller holder

1 1 1 1

Tapping screw (big) Seal A Tapping screw (small) Battery

8 1 2 2

Binder

WALL MOUNTED TYPE

Name and Shape Q ty Name and Shape Q ty Name and Shape Q ty Name and Shape Q ty
INSTALLATION

INSTALLATION
Wall hook bracket Wire assembly Remote controller Remote controller holder

1 1 1 1

Tapping screw Big EMI filter (ZCAT 1518-0730) Tapping screw Battery
12 Small
1 3 2
Normal
4

- (05 - 74) -
 5-8. REFRIGERANT LEAKAGE CAUTION
The installer and system specialist shall secure safety against leakage according to local
regulations or standards. The following concentration limit may be applicable if local
regulations are not available.

5-8-1. INTRODUCTION
Almost all our VRF(J series) type air conditioners use R410A as refrigerant. Though are
harmless and incombustible in itself, the room in which the air conditioner is installed
should be large enough that the refrigerant gas will not exceed the concentration limit
even if the refrigerant gas leaks.

Concentration limit
Concentration limit is the limit of Freon gas concentration where immediate measures
can be taken without hurting the human body when refrigerant leaks in to the air. The
concentration limit shall be described in units of Kg/m3 (Freon gas weight in /m3 air) to
facilite calculation.

Concentration limit : 0.3kg/m 3

Outdoor unit

Flow of
(No.1 system) refrigerant
INSTALLATION

INSTALLATION
Room where refrigerant leaks
(Refrigerant of the whole No.1
Indoor unit
system flows out.)

5-8-2. CHECKING CONCENTRATION LIMIT

Check concentration limit following steps 1 ~ 2 , and take appropriate measures depending
on the situation.
1 Calculate amount of all replenished refrigerant (kg)
per refrigerant system.

Amount of replenished refrigerant Amount of additional Total amount of replenished

per refrigerant system + = refrigerant in refrigerant facility
replenished refrigerant
(kg)

Amount of replenished refrigerant Amount of additionally replenished

at factory shipment refrigerant depending on piping length , Note : When one refrigerant facility is divided
into 2 or more refrigerant systems and
and piping diameter at customer. each system is Independent, total amount
of replenished refrigerant of each system
2 Calculate minimum room capacity. shall be adopted.
Calculate room capacity by regarding portion as one room or the smallest room.
(a) Without partition

Outdoor unit Outdoor unit

In the case of opening

without door, or 0.15%
Indoor unit Opening or more openings
Indoor unit (to floor space) both
Partition above and below door)

- (05 - 75) -
 Outdoor unit
(b) With partition and without opening which serve as
passage of air to adjoining room.

smallest
Indoor unit room

3 Calculate refrigerant concentration from the results of 1 and 2

Total amount of replenished refrigerant When the result of calculation exceeds
in refrigerant facility(kg) the limiting concentration,perform the
=Refrigerant concentration(kg/m3 )
Capacity of smallest room where same calculations by shifting to the
Indoor unit is installed(m 3 ) second smallest,and the third smallest
(R410A)
rooms until the final result is below the
limiting concentration.

When concentration limit is exceeded

When the concentration limit is exceeded,change the original plan or take one of the countermeasures
shown below.

Countermeasure 1
Provide opening for ventilation.
Provide 0.15% or more opening to floor space both above and below or provide opening without door.
Countermeasure 2
INSTALLATION

INSTALLATION
Provide gas leak alarm linked with mechanical ventilator.

Gas leak alarm

Countermeasure 2
Mechanical ventilator

Indoor unit

Countermeasure 1 Opening effective to ventilation

Pay special attention to the place, such as a basement, etc. When refrigerant can accummalate,
since refrigerant is heavier than air.

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