Electrical Work - Mitsubishi Electric PLA-RP-BA Installation Manual

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.
A B C
* Affi x label A that is included with the manuals near each wiring diagram for the indoor and outdoor units.
D
L
A B C N
S1
S2
S3
* Affi x label A that is included with the manuals near each wiring diagram for the indoor and outdoor units.
Indoor unit model
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. <For 35-140 outdoor unit application>
Max. 45 m
2
If 2.5 mm used, Max. 50 m
2
If 2.5 mm used and S3 separated, Max. 80 m
<For 200/250 outdoor unit application>
Max. 18 m
2
If 2.5 mm used, Max. 30 m
2
If 4 mm used and S3 separated, Max. 50 m
2
If 6 mm used and S3 separated, Max. 80 m
*2. The 10 m wire is attached in the remote controller accessory. Max. 500 m
*3. The fi gures 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 insulated 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 fl exible cord.
(Design 60245 IEC 57)
3. Install an earth longer than other cables.
Fig. 6-1
1 System
D G
L
N
S1 S1
S2 S2
S3 S3
E
1
F
2
Simultaneous twin/triple/four system
G G G
S1 S1 S1
S2 S2 S2
S3 S3 S3
E
1 1 1
F
2 2 2
*1
*1
*2
*3
*3
*3
*3
6.1. Indoor unit (Fig. 6-1)
1. Remove the electrical wiring service panel.
2. Remove the electrical box cover.
3. 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 cover can be suspended below the
unit during servicing. (Approx. 50 to 100 mm)
Entry for control cable
Entry for power
Clamp
Electrical box cover
Service panel for electrical wiring
Temporary hook for electrical box cover
Indoor / Outdoor unit connecting terminals
Remote controller connector
Secure with the clamp
Earth terminal
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 cords
F Remote controller
G Indoor unit
G
A Outdoor unit power supply
B Earth leakage breaker
C Wiring circuit breaker or isolating switch
D Outdoor unit
S1
S2
E Indoor unit/outdoor unit connecting cords
S3
F Remote controller
G Indoor unit
1
2
PLA
3× 1.5 (polar)
1 × Min.1.5
2 × 0.3 (Non-polar)
-
AC 230 V
DC24 V
DC12 V
7