127
OCH668B
9-3. DESIGN FOR CONTROL WIRING
Please note that the types and numbers of control wires needed by the CITY MULTI-S series depend on the remote
controllers and whether they are linked with the system or not.
9-3-1. Selection number of control wires
9-4. WIRING TRANSMISSION 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-core wire (non-polar)
Transmission
wires
Wires connecting → indoor units
Wires connecting → indoor units with outdoor unit
Wires connecting → outdoor units
9-4-1. Types of control cables
1. Wiring transmission cables
• Types of transmission cables: Shielding wire CVVS, CPEVS, or MVVS
• Cable diameter: More than 1.25 mm
2
• Maximum wiring length: Within 200 m
2. M-NET Remote control cables
Kind of remote control cable
Shielding wire (2-core) CVVS, CPEVS, or MVVS
Cable diameter
0.5 to 1.25 mm
2
Remarks
When 10 m is exceeded, use a cable with the same specifications
as transmission line wiring.
3. MA Remote control cables
Kind of remote control cable
Sheathed 2-core cable (unshielded) CVV
Cable diameter
0.3 to 1.25 mm
2
(0.75 to 1.25 mm
2
)*
Remarks
Within 200 m
* Connected with simple remote controller.
9-4-2. Wiring examples
•
Controller name, symbol and allowable number of controllers.
Name
Symbol
Allowable number of controllers
Outdoor unit controller
OC
―
Indoor unit controller
M-IC
PUMY-SP112
1 to 9 units per 1 OC
PUMY-SP125
1 to 10 units per 1 OC
PUMY-SP140
1 to 12 units per 1 OC
A-IC
PUMY-SP112
2 to 8 units per 1 OC
PUMY-SP125
PUMY-SP140
Branch box
―
―
0 to 2 units per 1 OC
Remote controller
RC
M-NET RC
Maximum of 12 controllers for 1 OC
(Cannot be connected if Branch box is used.)
MA-RC
Maximum of 2 per group
Note that the number of connectable units may be limited by some conditions such as an indoor unit's capacity or each unit's equivalent power consumption.
(Refer to DATA BOOK.)
