11
7. Electrical work
7.3. Wiring transmission cables
1
Types of control cables
1. Wiring transmission cables
Kind of transmisson cables
Shielding wire CVVS, CPEVS or MVVS
Cable diameter
More than 1.25 mm² [AWG 16]
Maximum wiring length
Within 200 m [656 ft]
2. 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.
M1
S
M2
D
A
E
M1
S
M2
TB3
TB1
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 wiring between the outdoor unit and the branch box to the trans-
mission terminal block (TB3) of the outdoor unit.
Connect the wiring between the outdoor unit and the centralized control system
to the transmission terminal block (TB7) of the outdoor unit.
When using shielded wiring, connect the ground of the shielded wiring to the
shield terminal (S) of the terminal block (TB3) or (TB7).
If the connection of the outdoor unit’s transmission power supply connector
has been changed from CN41 to CN42, connect the shield terminal (S) of the
terminal block (TB7) to the screw (
E
or
F
) using the included 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 branch box or centralized control system 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)
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
[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
MA-RC: MA remote controller
WL-RC: Wireless remote controller
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