MITSUBISHI ELECTRIC Mr. Slim PLA-A-AA - Manual (Page 8)

8
6. Electrical work
6.1.2. Separate indoor unit/outdoor unit power supplies (A-control application)
The following connection patterns are available.
The outdoor unit power supply patterns vary on models.
1:1 System
S1
S2
L1
L2
GR GR
1
2
L1
L2
S1
S2
S3
S3
A B
C
G
D
B
E
F
* Affix a label B 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 power supply
Simultaneous twin system
If the indoor and outdoor units have separate power supplies, refer to the table at the
below. Change the indoor unit electrical box wiring refering to the figure in the right
and the DIP switch settings of the outdoor unit control board.
* Affix a label B 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 power supply
ON
OFF
1 2 (SW8)
3
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)
Indoor unit specifications
Required
Required
*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.
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.
4. Install an earth longer than other cables.
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
Single 208/230 V, 60 Hz Single 208/230 V, 60 Hz
1 A 2A
15A 15A
2 × Min. AWG16 2 × Min. AWG16
1 × Min. AWG16 1 × Min. AWG16
2 × AWG22 (polar) 2 × AWG22 (polar)
– –
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
Connectors (connections when shipped
from the factory are for indoor unit power
supplied from outdoor unit)
Indoor unit power supplied from outdoor unit
(when shipped from factory)
If the indoor and
outdoor units have
separate power
supplies, change the
connections of the
connectors as shown
in the following
figure.
Connectors
Indoor unit
control board
Separate indoor unit/outdoor unit power
supplies
Indoor unit
control board
* There are three types of labels (labels A, B, and C). Affix the appropriate labels to
the units according to the wiring method.
S1
S2
L1
GR
L2
1
2
L1
L2
GR GR
S1
S2
S3
1
2
L1
L2
S1
S2
S3
S3
A B
C
D
G B
E
F F
S1
S2
S3
L1
L2
GR
BLUE BLUE
YELLOW YELLOW
CND CND
ORANGE
CND
ORANGE
S1
S2
S3
L1
L2
GR
YELLOW BLUE
BLUE YELLOW
CND
BG79U795H01_en.pm6 05.12.1, 9:48 AM 8