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10.8.3 Wiring Specifications
Number of wires
2
Size
Up to 1000 m: 1.25 mm² stranded wires
Up to 2000 m: 2.0 mm² stranded wires
Specification
MVVS
• A 2-wire non-polarity cable is used.
• The cable length depends on each central control system.
• When used in a system including multiple air conditioners, the length includes the length of all wires between
indoor and outdoor units on the side of multiple air conditioners.
• Use 2-wire shield cable (MVVS) to protect from noise.
• Joint shield wire between indoor units by closed-end terminating, and leave its end open with insulation
processing. Make one-point grounding at the indoor unit side. Set the terminating resistors.
(Central control for custom indoor units only)
Notes
1 Joint shield wire between indoor units by closed-end terminating.
2 Leave the end of the shield wire open with insulation processing.
3 Make one-point grounding at the indoor unit side.
Central control device
U1
U2
123
Outdoor unit
Indoor unit
12
3123123
123
A
B
U3
U4 123
A
B
U3
U4 123
A
B
123
A B
123
A B
123
A B
U3
U4
Caution 1
Remote controller
Central control system wiring
Header unit
Header unit
Follower unit
Follower unit
Follower unit
Caution 2
Remote controller Remote controller Remote controller
(Group operation) (Triple operation)
Caution 3
: TCC-LINK adapter (option)
Required for DI-SDI indoor units
other than Wall Type
Earth screw
FILE NO. SVM-12004
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