Mitsubishi Electric PAC-AK53BC Installationshandbuch Seite 8

9. Electrical work
<Example 1>
(in case of 2-branch boxes)
Outdoor unit
(A) (A)
L
N
Circuit
(C)
breaker
S1
(B)
S2
S3
(C)
<Example2>
(in case of wiring to P100 indoor unit(s))
Branch Box
(PAC-AK52BC only)
(A) (A)
L
E
N
Circuit
TB2B
(C)
breaker (B)
S1
S1
S2
S2
S3 S3
8
Branch box 1
#
(5-branch type)
Indoor unit
TB3A
(D)
A ROOM
S1 S1
S2 S2
S3 S3
TB2B TB3B
B ROOM
(D)
S1 S1 S1
S2 S2 S2
S3 S3 S3
TB3C
(D)
C ROOM
S1 S1
S2 S2
S3 S3
TB3D
(D)
D ROOM
S1 S1
S2 S2
S3 S3
TB3E
E ROOM
(D)
S1 S1
S2 S2
S3 S3
Indoor unit
TB3A
(D)
F ROOM
S1 S1
S2 S2
S3 S3
TB3B
G ROOM
(D)
TB2B S1 S1
S2 S2
S1
S3 S3
S2
S3
TB3C
H ROOM
(D)
S1 S1
S2 S2
S3 S3
Branch box 2
#
(3-branch type)
Fig. 9-5
Indoor unit
TB3A (D)
A ROOM
S1 S1
S2 S2 P100
Indoor unit
S3 S3
TB3B
S1 S1
S2 S2
S3 S3
TB3C (D)
B ROOM
S1 S1
P100
S2 S2
Indoor unit
S3 S3
TB3D
S1
S2
S3
TB3E
S1
S2
S3
Fig. 9-6
9.2. External wiring procedure (Fig. 9-5)
Power supply: Single phase 0/30/40 V, 50 Hz 0 V, 60 Hz
E
Note:
1 Power supply input: Outdoor unit only. Connect the lines (C), (D) in accor-
dance with the terminal block names to ensure correct polarity.
2 As for lines (C), S1 and S2 are for connecting the power source.
And S2 and S3 are for signals. S2 is a common cable for the power source
and signal.
Wire diameter
(A) Main (B) Earth (C) Signal line/
power line line Earth line
1.5 mm² */
6.0 mm² 6.0 mm²
Min. 1.5 mm²
When using twisted wire for the wiring, the use of round terminal is required.
*1 Refer to the installation manual of the outdoor unit.
* If 1.5 mm² used, Max. 45 m ("Outdoor unit - Branch box #1" plus "Branch box #1
- Branch box #"). If .5 mm² used, Max. 55 m
(When connecting indoor unit of PEAD series)
If 1.5 mm² used, Max. 30 m ("Outdoor unit - Branch box #1" plus "Branch box #1
- Branch box #").
If .5 mm² used, Max. 50 m
If 3.5 mm² used, and S3 separated, Max. 55 m
Use one cable for S1 and S and another for S3 as
shown in the picture.
Notes: 1. Wiring size must comply with the applicable local and national
code.
2. Power supply cords and Indoor unit/Branch box/Outdoor unit con-
necting cords shall not be lighter than polychloroprene sheathed
flexible cord. (Design 60245 IEC 57)
3. Install an earth line longer than power cables.
9.3. Wiring to P100 indoor units (Fig. 9-6)
• When wiring P100 indoor unit(s), only use PAC-AK5BC/PAC-AK53BC branch
box.
• When wiring a single P100 indoor unit, use TB3A.
Notes:
• When wiring a single P100 indoor unit, ONLY use TB3A.
If a single P100 indoor unit is wired to the other terminal block, an alarm
will be activated, and the indoor unit will not operate.
• When a single P100 indoor unit is wired to TB3A, do not wire any indoor
unit to TB3B. Otherwise, an alarm will be activated, and the indoor unit
will not operate.
• TB3C, TB3D, and TB3E are available for wiring of indoor units that are
not P100.
• When wiring two P100 indoor units, use TB3A and TB3C.
Notes:
• When wiring two P100 indoor units, ONLY use TB3A and TB3C.
If two P100 indoor units are wired to the other terminal blocks, an alarm
will be activated, and the indoor units will not operate.
• When two P100 indoor units are wired to TB3A and TB3C respectively,
do not wire any indoor unit to TB3B or TB3D. Otherwise, an alarm will be
activated, and the indoor unit will not operate.
Breaker
(D) Signal line/ Interrupting Performance
Earth line current characteristic
1.5 mm²/
*1 *1
Min. 1.5 mm²