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8-2.Control Wiring
(1) Specifications of control wiring and maximum length of wiring
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)
System component
Wiring specifications
Total length of indoor/outdoor transmission line
2 Remote control wiring
Wiring specifications
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
✻
3: When connecting to simple remote controller terminal, use a cable with a diameter within the range shown in
the parenthesis.
8-3.Types of switch settings and setting methods
Whether a particular system requires switch settings depends on its components. Refer to the section "7-4
Wiring and Address Setting" 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.
Outdoor unit
Indoor unit
✻
10HP has only the main controller
Length of transmission line
n/a
Facility type
All types of facilities
(noise level measurement)
Shield cable
Cable type
CVVS
No. of cable
2-core cable
Diameter
Over 1.25mm
Maximum length: 200m
Maximum length of centralized control transmission line and Indoor/Outdoor
transmission line via indoor/outdoor units: 500m maximum
Cable type
VCTF
No. of cable
2-core cable
0.3~1.25mm
Diameter
(0.75~1.25mm
Maximum length: 200 m
2
or smaller recommended for easier handling.
Unit
Main/sub controllers
18
For multiple-refrigerant system
·
CPEVS
2
MA remote controller
·
VCTFK
·
CVV
·
CVS
·
VVR
✻
2
2
✻
2
)
3
Symbol
OC
Outdoor unit
✻
IC
Indoor and outdoor units
✻
1
·
VVF
·
VCT
Turn off the power to
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