75
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
controllers 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
Use
Remote controller → indoor unit
Wires connecting → indoor units
Wires connecting → indoor units with outdoor unit
Wires connecting → outdoor units
2 wires (non-polar)
M-NET remote controller
Remote controller used in system control operations.
• Group operation involving different refrigerant systems.
• Linked operation with upper control system.
Transmission
wires
Transmission wires
• Types of transmission cables : Shielding wire CVVS or CPEVS.
• Cable diameter : More than 1.25E
• Maximum wiring length : Within 200 m
Kind of remote control cable
Cable diameter
Remarks
Shielding wire MVVS
0.5 to 1.25E
When 10m is exceeded, use cable with the same
specifications as 10-3-2. Control signal wires.
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
3 phase 4 wire.
50Hz 380-400-415V
Power supply
Single phase.
50Hz 220-230-240V
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
:1.6mm × 2
0.5~1.25mm
2
× 2
1.25mm
2
× 2
10-3-4. MA Remote control cables
Kind of remote control cable
Cable diameter
2-core cable (unshielded)
0.3 to 1.25 A
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