Mitsubishi Electric Mr.SLIM PLA-MEA Serie Manuel D'installation page 11

6. Electrical work
6.1.1. Indoor unit power supplied from outdoor unit
The following connection patterns are available.
The outdoor unit power supply patterns vary on models.
B C
A
* Affix label A that is included with the manuals near each wiring diagram for the indoor and outdoor units.
D
L
B C
A
N
S1
S2
S3
* Affix label A that is included with the manuals near each wiring diagram for the indoor and outdoor units.
Note:
Some units cannot be used in a simultaneous twin/triple/quadruple system. Refer to the outdoor unit installation manual for details.
Indoor unit model
Indoor unit-Outdoor unit
Indoor unit-Outdoor unit earth
Indoor 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. <For 35-140 outdoor unit application>
Max. 45 m
If 2.5 mm used, Max. 50 m
2
If 2.5 mm used and S3 separated, Max. 80 m
2
<For 200/250 outdoor unit application>
Max. 18 m
If 2.5 mm used, Max. 30 m
2
If 4 mm 2 used and S3 separated, Max. 50 m
If 6 mm used and S3 separated, Max. 80 m
2
*2. Max. 500 m
(When using 2 remote controllers, the maximum wiring length for the remote controller cables is 200 m.)
*3. The figures are NOT always against the ground.
S3 terminal has 24 VDC / 28 VDC against S2 terminal. However between S3 and S1, these terminals are not electrically insulated by the transformer or other device.
*4. It depends on the outdoor unit.
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 60245 IEC 57)
3. Install an earth longer than other cables.
4. Indoor and outdoor connecting wires have polarities. Make sure to match the terminal number (S1, S2, S3) for correct wirings.
5. Wiring for remote controller cable shall be apart (50 mm or more) from power source wiring so that it is not influenced by electric noise from power
source wiring.
Warning:
Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a fire or communication failure.
D G
L
N
S1 S1
S2 S2
S3 S3
E
1
F
2
Simultaneous twin/triple/quadruple system
G G G G
S1 S1 S1 S1
S2 S2 S2 S2
S3 S3 S3 S3
E
1 1 1 1
F
2 2 2 2
*1
*1
*2
*3
*3
*3 *4
*3
1:1 System
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 cables
F Remote controller
G Indoor unit
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 cables
F Remote controller
G Indoor unit
PLA
3 × 1.5 (polar)
1 × Min. 1.5
1 × Min. 1.5
2 × 0.3 (Non-polar)
—
230 VAC
24 VDC / 28 VDC
12 VDC
en
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