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10-3. DESIGN FOR CONTROL WIRING
Please note that the types and numbers of control wires needed by the CITY MULTI-S series will depend on the remote con-
trollers and whether they are linked with the system.
10-3-1. Selection number of control wires
10-3-3. M-NET Remote controller wiring
10-3-2. Control signal wires
Transmission wires
• Types of transmission cables : Shielding wire CVVS or CPEVS.
• Cable diameter : More than 1.25 E [AWG 16]
• Maximum wiring length : Within 200 m [656 ft]
10-4. SYSTEM SWITCH SETTING
In order to identify the destinations of signals to the outdoor units, indoor units, and remote controller of the MULTI-S series,
each microprocessor must be assigned an identification number (address). The addresses of outdoor units, indoor units, and
remote controller must be set using their settings switches. Please consult the installation manual that comes with each unit for
detailed information on setting procedures.
10-5. EXAMPLE EXTERNAL WIRING DIAGRAM FOR A BASIC SYSTEM
10-5-1. Example using a M-NET remote controller
Outdoor
unit
Power supply
Single phase 2 wire
60Hz 208/230V
Power supply
Single phase
60Hz 208/230V
Grounded
Group operation
Remote controller wire
Pull box
Indoor unit
Breaker for Wiring
and Current Leakage
15A Breaker for Wiring
and Current Leakage
:1.6mm × 2
[AWG14]
:1.6mm × 2
[AWG14]
0.5~1.25mm
2
× 2
[AWG20 ~ AWG16]
1.25mm
2
× 2
[AWG16]
10-3-4. MA Remote control cables
M-NET remote controller
Use
Remote controller used in system control operations.
• Group operation involving different refrigerant systems.
• Linked operation with upper control system.
Remote controller → indoor unit
2 wires (non-polar)
Transmission
wires
Wires connecting → indoor units
Wires connecting → indoor units with outdoor unit
Wires connecting → outdoor units
Kind of remote control cable Shielding wire MVVS
Cable diameter 0.5 to 1.25 E [AWG 20 to AWG 16]
Remarks
When 10 m is exceeded, use cable with the same
specifications as 10-3-2. Transmission line wiring
Kind of remote control cable 2-core cable (unshielded)
Cable diameter 0.3 to 1.25 E [AWG 22 to AWG 16]