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8. Electrical work
8.1. Power supply
8.1.1. Indoor unit power supplied from outdoor unit
The following connection patterns are available.
The outdoor unit power supply patterns vary on models.
1:1 System
[Fig. 8-1] (P.5)
A Outdoor unit power supply
B Earth leakage breaker
C Wiring circuit breaker or isolating switch
D Outdoor unit
E Indoor unit/outdoor unit connecting cords
F Remote controller (option)
G Indoor unit
* Affix a label A that is included with the manuals near each wiring diagram for the
indoor and outdoor units.
Simultaneous twin/triple/four system
[Fig. 8-2] (P.5)
A Outdoor unit power supply
B Earth leakage breaker
C Wiring circuit breaker or isolating switch
D Outdoor unit
E Indoor unit/outdoor unit connecting cords
F Remote controller (option)
G Indoor unit
* Affix a label A that is included with the manuals near each wiring diagram for the
indoor and outdoor units.
Field electrical wiring
Indoor unit model
Indoor unit power supply (Heater)
Indoor unit power supply (Heater) earth
Indoor unit-Outdoor unit
Indoor unit-Outdoor unit earth
Remote controller-Indoor unit
Indoor unit (Heater) L-N
Indoor unit-Outdoor unit S1-S2
Indoor unit-Outdoor unit S2-S3
Remote controller-Indoor unit
*1. The 10 m wire is attached in the remote controller accessory. Max. 500 m
*2. The figures are NOT always against the ground.
S3 terminal has 24 V DC against S2 terminal. However between S3 and S1, these terminals
are not electrically insulataed by the transformer or other device.
Notes: 1. Wiring size must comply with the applicable local and national code.
2. Power supply cords and indoor unit/outdoor unit connecting cords
shall not be lighter than polychloroprene sheathed flexible cord.
(Design 245 IEC57)
3. Install an earth longer than other cables.
18
PEAD
–
–
3 × 1.5 (polar)
1 × Min. 1.5
2 × 0.3 (Non-polar)
*1
*2
–
230 V AC
*2
*2
24 V DC
14 V DC
*2
8.1.2. Separate indoor unit/outdoor unit power supplies (For PUHZ
application only)
The following connection patterns are available.
The outdoor unit power supply patterns vary on models.
1:1 System
* The optional wiring replacement kit is required.
[Fig. 8-3] (P.5)
A Outdoor unit power supply
B Earth leakage breaker
C Wiring circuit breaker or isolating switch
D Outdoor unit
E Indoor unit/outdoor unit connecting cords
F Remote controller (option)
G Indoor unit
H Option
J Indoor unit power supply
* Affix a label B that is included with the manuals near each wiring diagram for the
indoor and outdoor units.
Simultaneous twin/triple/four system
* The optional wiring replacement kits are required.
[Fig. 8-4] (P.5)
A Outdoor unit power supply
B Earth leakage breaker
C Wiring circuit breaker or isolating switch
D Outdoor unit
E Indoor unit/outdoor unit connecting cords
F Remote controller (option)
G Indoor unit
H Option
J Indoor unit power supply
* Affix a label B that is included with the manuals near each wiring diagram for the
indoor and outdoor units.
If the indoor and outdoor units have separate power supplies, refer to the table at the
below. If the optional wiring replacement kit is used, change the indoor unit electrical
box wiring refering to the figure below and the DIP switch settings of the outdoor unit
control board.
Indoor power supply terminal kit (option)
Indoor unit electrical box connector con-
nection change
Label affixed near each wiring diagram
for the indoor and outdoor units
Outdoor unit DIP switch settings (when
using separate indoor unit/outdoor unit
power supplies only)
* There are three types of labels (labels A, B, and C). Affix the appropriate labels to
the units according to the wiring method.
Connectors (connections when
shipped from the factory are for indoor
unit power supplied from outdoor unit)
L
N
RED
CND
Power
S1
supply
S2
board
S3
Indoor
controller
board
Indoor unit power supplied from outdoor
unit (when shipped from factory)
A breaker with at least 3.0 mm contact
separation in each pole shall be provided.
Use non-fuse breaker (16A) or earth leak-
age breaker (16A).
Indoor unit specifications
Required
Required
Required
ON
3
OFF
1
2
(SW8)
If the indoor and
outdoor units have
separate power
supplies, change the
connections of the
connectors as shown in
the following figure.
Connectors
L
N
RED
CND
Power
S1
supply
S2
board
S3
Indoor
controller
board
Separate indoor unit/outdoor unit power
supplies
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