Mitsubishi Electric MXZ-8C60NA Manuel D'installation page 11

7. Electrical work
L1 L2 GR B1 B2
M1
TB1 TB1B TB3
B
C
A
CONDUIT PLATE:
accessory
ø24 knock-out hole
(For transmission wires)
A : Power source
B : Power supply for branch box
C : Screw on the electrical component box
D : Transmission line
Fig. 7-1
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
When 10 m [32 ft] is exceeded, use cable with
Remarks the same specifications as transmission line
wiring.
* Connected with simple remote controller.
2 Wiring examples
[1] Basic systems
OC:
BC:
A-IC:
OC
MA-RC: MA remote controller
WL-RC: Wireless remote controller
BC (5-branch type)
A B C D
A-IC A-IC A-IC A-IC
MA-RC MA-RC
WL-RC WL-RC
[2] Standard systems
2-1. Only 3-branch type
OC
BC (3-branch type)
A B C
A-IC A-IC A-IC
WL-RC WL-RC
WL-RC
E
M2 S M1 M2 S
F
TB7
D
ø37 knock-out hole
(For power supply wires)
E : Screw on the electrical component box
F : Screw on the electrical component box
[AWG 20 to AWG 16]*
2
Outdoor unit
Branch box
A-Control indoor unit (M, P, S series indoor unit)
BC (3-branch type)
E A B C
A-IC A-IC A-IC A-IC
WL-RC WL-RC WL-RC WL-RC
2-2. Only 5-branch type
OC
BC (5-branch type)
A B C
A-IC A-IC A-IC
WL-RC WL-RC WL-RC
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been replaced by CN40, the shield terminal (S) of terminal block (TB7) of the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
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.
3. MA Remote control cables
Kind of remote control cable
Cable diameter
Remarks
* Connected with simple remote controller.
OC
BC
A B
A-IC A-IC
MA-RC MA-RC
2-3. 2-branch boxes (3-branch type)
D E
A-IC
A-IC A-IC
WL-RC
WL-RC WL-RC
Sheathed 2-core cable (unshielded) CVV
0.3 to 1.25 mm² [AWG 22 to AWG 16] (0.75 to
1.25 mm² [AWG 18 to AWG 16] )*
Within 200 m [656 ft]
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.
(5-branch type) BC (3-branch type)
C D E A B
A-IC A-IC
WL-RC WL-RC
OC
BC (3-branch type) BC (3-branch type)
A B C A B
A-IC A-IC A-IC A-IC
WL-RC WL-RC WL-RC WL-RC
240 V.
~
C
A-IC
WL-RC
C
A-IC
WL-RC
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