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Transmission line is a type of control line. When the source of noise is located adjacent to the unit, the use of
shield cable as well as moving the unit as far away from the noise source are recommended.
1
Transmission line (M-NET transmission line)
For multiple-refrigerant system
Length of transmission line
Facility type
(noise level measurement)
No. of cable
2-core cable
Diameter
Over 1.25mm
2
Wiring specifications
All types of facilities
n/a
Shield cable
CVVS · CPEVS
System component
Maximum length: 200m
Maximum length of centralized control transmission line and Indoor/Outdoor
transmission line via indoor/outdoor units: 500m maximum
Total length of indoor/outdoor transmission line
Cable type
(4) Types of switch settings and setting methods
Whether a particular system requires switch settings depends on its components. Refer to the section
“(5) Examples” before conducting electrical work.
Keep the power turned off while setting the switches. If settings are changed while being powered, the
changed settings will not register, and the unit may malfunction.
Symbol
Outdoor unit
OC
Indoor unit
✻
10HP has only the main controller
Main/sub controllers
✻
IC
Turn off the power to
Outdoor unit
Indoor and outdoor units
Unit
2
Remote control wiring
MA remote controller
✻
1
No. of cable
2-core cable
Diameter
0.3~1.25mm
2
(0.75~1.25mm
2
)
✻
2
✻
3
Wiring specifications
CVV
Maximum length: 200 m
Total Length
✻
1: “MA remote controller” includes MA remote controller, Simple MA controller, and wireless remote controller.
✻
2: Cables with a diameter of 0.75mm
2
or smaller recommended for easier handling.
✻
3: When connecting to simple remote controller terminal, use a cable with a diameter within the range shown in
the parenthesis.
Cable type
(3) Control Wiring