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11
OC
BC BC
MA-RC
A-IC
Note:
The indoor units can be connected
to any of the 5 connectors (5-branch
type) or 3 connectors (3-branch type)
of the branch box.
A-IC A-IC A-IC A-IC A-IC A-IC A-IC
MA-RC
WL-RC WL-RC WL-RC WL-RC WL-RC WL-RC
OC
BC BC
MA-RC
A-IC A-IC A-IC A-IC A-IC
MA-RC
WL-RC WL-RC WL-RC
A
B
C
D
E
A
B C A
B
C
D
E A
B
C
7. Electrical work
7.3. Wiring transmission cables
1 Types of control cables
1. Wiring transmission cables
• Types of transmission cables: Shielding wire CVVS or CPEVS or MVVS
• Cable diameter: More than 1.25 mm² [AWG 16]
• Maximum wiring length: Within 200 m [656 ft]
2. M-NET Remote control cables
Kind of remote control cable Shielding wire (2-core) CVVS, CPEVS or MVVS.
Cable diameter 0.5 to 1.25 mm
2
[AWG 20 to AWG 16]*
Remarks
When 10 m
[32 ft] is exceeded, use cable with
the same specications as transmission line
wiring.
* Connected with simple remote controller.
M1
S
M2
DA
E
M1
S
M2
TB3TB1 TB7
F
B1 B2
TB1B
C
B
L1
L2
GR
A : Power source
B : Power supply for branch box
C : Screw on the electrical component box
D : Transmission line
7.2. Control box and connecting position of wiring
(Fig. 7-1)
1. Connect the branch box transmission line to transmission terminal block (TB3),
or connect the wiring between outdoor units or the wiring with the centralized
control system to the centralized control terminal block (TB7).
When using shielded wiring, connect shield ground of the branch box transmis-
sion line to the screw (E or F) and connect shield ground of the line between
outdoor units and the central control system transmission line to the shield (S)
terminal of the centralized control terminal block (TB7) shield (S) terminal. In
addition, in the case of outdoor units whose power supply connector CN41 has
been replaced by CN40, the shield terminal (S) of terminal block (TB7) of the
centralized control system should also be connected to the screw (E or F) using
attached lead wire.
2. Conduit mounting plates (ø27) are being provided. Pass the power supply and
transmission wires through the appropriate knock-out holes, then remove the
knock-out piece from the bottom of the terminal box and connect the wires.
3. Fix power source wiring to terminal box by using buffer bushing for tensile force
(PG connection or the like).
4. The terminal bed (TB1B) is for supplying power to the branch box (220
~ 240 V.
max 6A).
Caution:
Never connect the transmission line for the branch box or the central control
system transmission line to this terminal bed (TB1B). If the transmission
lines are connected, the indoor unit terminal block, branch box terminal
block or centralized control terminal block could be damaged.
Fig. 7-1
E : Screw on the electrical component box
F : Screw on the electrical component box
CONDUIT PLATE:
accessory
ø24 knock-out hole
(For transmission wires)
ø37 knock-out hole
(For power supply wires)
3. MA Remote control cables
Kind of remote control cable Sheathed 2-core cable (unshielded) CVV
Cable diameter
0.3 to 1.25 mm² [AWG 22 to AWG 16] (0.75 to
1.25 mm² [AWG 18 to AWG 16])*
Remarks Within 200 m [656 ft]
* Connected with simple remote controller.
[2] Standard systems
2-1. Only 3-branch type 2-2. Only 5-branch type 2-3. 2-branch boxes (3-branch type)
OC
BC
A-IC A-IC A-IC
WL-RC
WL-RC
WL-RC
A
B
C
OC
BC
A-IC A-IC A-IC
WL-RC WL-RC WL-RC
A-IC A-IC
WL-RC WL-RC
A
B
C
D
E
OC
BC BC
A-IC A-IC A-IC A-IC A-IC A-IC
WL-RC WL-RC WL-RC WL-RC WL-RC WL-RC
A
B C
A
B C
(3-branch type)
(5-branch type)
(3-branch type) (3-branch type)
(5-branch type)
(3-branch type)
(5-branch type)
(3-branch type)
2 Wiring examples
[1] Basic systems
OC: Outdoor unit
BC: Branch box
A-IC: A-Control indoor unit (M, P, S series indoor unit)
MA-RC: MA remote controller
WL-RC: Wireless remote controller
RG79D595H06_EN.indd 11 9/7/2016 9:49:58 AM
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