7
6. Electrical work
6.1. Indoor unit (Fig. 6-1)
1. Remove the two electrical wiring service panels.
2. Wire the power cable and control cable separately through the respective wiring
entries given in the diagram.
• Do not allow slackening of the terminal screws
.
• Leave excess cable so that the electrical box can be suspended below the unit
during servicing. (Approx. 50 to 100 mm, 2 to 4 inch)
A
Entry for control cable
B
Entry for power
C
Clamp
D
Service panel for indoor controller switch setting
E
Service panel for electrical wiring
F
Power supply terminals (separate indoor/outdoor unit power supplies,
K-control application)
G
Indoor / Outdoor unit connecting terminals
H
Remote controller connector
I
Secure with the clamp
J
Intake sensor
K
Holder
Fig. 6-1
A
E
D
J
,
K
B
C
I
G
F
H
L2 GR
L1
S3
S2
S1
1
2
6.1.1. Indoor unit power supplied from outdoor unit (A-control application)
The following connection patterns are available.
The outdoor unit power supply patterns vary on models.
1:1 System
Simultaneous twin system
* Affix a label A that is included with the manuals near each wiring diagram for the indoor and outdoor units.
A
Outdoor unit power supply
B
Wiring circuit breaker or isolating switch
C
Outdoor unit
D
Indoor unit/outdoor unit connecting cords
E
Remote controller
F
Indoor unit
G
Indoor unit earth
* Affix a label A that is included with the manuals near each wiring diagram for the indoor and outdoor units.
*1. Max. 50 m, 165 ft
*2. The 10 m, 30 ft wire is attached in the remote controller accessory. Max. 500 m, 1500 ft
*3. The figures are NOT always against the ground.
S3 terminal has DC 24 V 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. Use copper supply wires.
3. Use wires rated 300V or more for the power supply cables and the indoor unit/outdoor unit connecting cables.
4. Install an earth longer than other cables.
A
Outdoor unit power supply
B
Wiring circuit breaker or isolating switch
C
Outdoor unit
D
Indoor unit/outdoor unit connecting cords
E
Remote controller
F
Indoor unit
G
Indoor unit earth
Indoor unit model
Indoor unit power supply
Minimum circuit ampacity
Maximum rating of overcurrent protective device
Indoor unit power supply
Indoor unit power supply earth
Indoor unit-Outdoor unit
*1
Indoor unit earth
Remote controller-Indoor unit
*2
Indoor unit L1-L2
*3
Indoor unit-Outdoor unit S1-S2
*3
Indoor unit-Outdoor unit S2-S3
*3
Remote controller-Indoor unit
*3
PLA-A12, 18, 24, 30
PLA-A36, 42
–
–
1A
2A
15A
15A
–
–
–
–
3
×
AWG16 (polar)
3
×
AWG16 (polar)
1
×
Min. AWG16
1
×
Min. AWG16
2
×
AWG22 (Non-polar)
2
×
AWG22 (Non-polar)
–
–
AC 208/230 V
AC 208/230 V
DC24 V
DC24 V
DC12 V
DC12 V
Circuit
rating
Wir
ing
Wire No
.
×
siz
e
S1
S2
L1
L2
GR
1
2
S1
S2
S3
S3
A
B
C
D
E
F
G
S1
S2
L1
L2
GR
1
2
S1
S2
S3
1
2
S1
S2
S3
S3
A
B
C
E
F
F
G
G
D
BG79U795H01_en.pm6
05.12.1, 9:48 AM
7
