1-28
1
1
(B) Outdoor Unit
NC-20
NC-30
NC-40
NC-50
NC-60
NC-70
60
70
80
90
50
40
30
20
10
4000
0
0
0
8
0
5
2
5
2
1
3
6
2000
1000
500
MODEL
SOUND LEVEL
CONDITION
: U-250PE1E8
: STANDARD 58 dB(A)
QUIET MODE 50 dB(A)
: 1 m in front at height of 1.5 m
Approximate
minimum
audible limit for
continuous noise
Overall
Frequency at center of sound pressure band (Hz)
Octa
ve
Band Le
vel (dB)
(0dB = 0.0002 µbar
)
60
70
80
90
50
40
30
20
10
4000
0
0
0
8
0
5
2
5
2
1
3
6
2000
1000
500
MODEL
SOUND LEVEL
CONDITION
: U-250PE1E8
: STANDARD 57 dB(A)
QUIET MODE 50 dB(A)
: 1 m in front at height of 1.5 m
NC-20
NC-30
NC-40
NC-50
NC-60
NC-70
Approximate
minimum
audible limit for
continuous noise
Overall
Frequency at center of sound pressure band (Hz)
Octa
ve
Band Le
vel (dB)
(0dB = 0.0002 µbar
)
: U-250PE1E8
: 72 dB(A)
: Cooling
MODEL
SOUND
POWER LEVEL
REMARKS:
NOTE
1. Value obtained in the actual place where the unit is installed
may be slightly higher than the values shown in this graph
because of the conditions of operation, the structure of the
building, the background noise and other factors.
2. The test results were obtained from an nechoic room.
To evaluate “Noise level” the maximum number of the measured
OCTAVE BAND SOUND PRESSURE LEVEL is used.
Read the number on each BAND CENTER FREQUENCIES
(horizontal axis) ranging from 63 Hz to 8000 Hz and select the
maximum value (vertical axis) among them.
COOLING
HEATING
Standard
Quiet mode
NC-20
NC-30
NC-40
NC-50
NC-60
NC-70
60
70
80
90
50
40
30
20
10
Frequency at center of sound pressure band (Hz)
4000
63
125 250
8000
2000
1000
500
Overall
SOUND POWER LEBEL
1-9. ELECTRICAL WIRING
General Precautions on Wiring
(1)
(4)
(5)
(6)
(7)
(8)
Before wiring, confirm the rated voltage of the unit as shown on its nameplate, then carry out the wiring closely following
the wiring diagram.
(2)
(3)
This equipment is strongly recommended to be installed with Earth Leakage Circuit Breaker (ELCB) or Residual Current
Device (RCD). Otherwise, it may cause electrical shock and fire in case of equipment breakdown or insulation breakdown.
Earth Leakage Circuit Breaker (ELCB) must be incorporated in the fixed wiring in accordance with the wiring regulations.
The Earth Leakage Circuit Breaker (ELCB) must be an approved 10-16 A, having a contact separation in all poles.
To prevent possible hazards from insulation failure, the unit must be grounded.
Each wiring connection must be done in accordance with the wiring system diagram.
Wrong wiring may cause the unit to misoperate or become damaged.
Do not allow wiring to touch the refrigerant tubing, compressor, or any moving parts of the fan.
Unauthorized changes in the internal wiring can be very dangerous. The manufacturer will accept no responsibility for any
damage or misoperation that occurs as a result of such unauthorized changes.
Regulations on wire diameters differ from locality to locality. For field wiring rules, please refer to your LOCAL ELECTRICAL
CODES before beginning.
You must ensure that installation complies with all relevant rules and regulations.
To prevent malfunction of the air conditioner caused by electrical noise, care must be taken when wiring as follows:
The remote control wiring and the inter-unit control wiring should be wired apart from the inter-unit power wiring.
Use shielded wires for inter-unit control wiring between units and ground the shield on both sides.
(9) If the power supply cord of this appliance is damaged, it must be replaced by a repair shop designated by the manufacturer,
because special-purpose tools are required.
Recommended Wire Length and Wire Diameter for Power Supply System
Outdoor unit (3-Phase)
(A) Power supply
Time delay
fuse or circuit
capacity
Wire size
Max. length
U-200PE1E8
14 mm
2
116 m
15 A
U-250PE1E8
14 mm
2
96 m
20 A
Indoor unit
(B) Power supply
Time delay fuse or
circuit capacity
2.5 mm
2
S-200PE1E8
E1
E2
S-200PE1E8A
S-250PE2E5
S-200PE2E5
S-250PE1E8
10/16 A
Max. 50/30 m
Max. 50/30 m
Max. 30 m
10/16 A
10-16 A
Control wiring
(C) Inter-unit control wiring
(between outdoor and indoor units)
(D) Remote control wiring
0.75 mm
2
(AWG #18)
0.75 mm
2
(AWG #18)
Use shielded wiring*
1
Max. 500 m*
2
Max. 1,000 m
NOTE
*1 With ring-type wire terminal.
*2 When the type “E1” is used with maximum length of 500 m for group control, and if the remote controller for the group control
is wireless, the maximum length will be 400 m.
WARNING
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