Design For Control Wiring; System Switch Setting; Example External Wiring Diagram For A Basic System; Selection Number Of Control Wires - Mitsubishi PUMY-P60NKMU Technical & Service Manual

9-3. 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.

9-3-1. Selection number of control wires

Remote controller → indoor unit
Wires connecting → indoor units
Wires connecting → indoor units with outdoor unit
Wires connecting → outdoor units
9-3-2. 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]
9-3-3. M-NET Remote controller wiring
Kind of remote control cable
Cable diameter
Remarks
9-3-4. MA Remote control cables
Kind of remote control cable
Cable diameter

9-4. 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.

9-5. EXAMPLE EXTERNAL WIRING DIAGRAM FOR A BASIC SYSTEM

9-5-1. Example using a M-NET remote controller
Breaker for Wiring
and Current Leakage
Power supply
Single phase 2 wire
60Hz 208/230V
15A Breaker for Wiring
and Current Leakage
Power supply
Single phase
60Hz 208/230V
1.6mm × 2
[AWG14]
OCH502C
Use
Shielding wire MVVS
0.5 to 1.25 E [AWG 20 to AWG 16]
When 10 m is exceeded, use cable with the same
specifications as 10-3-2. Transmission line wiring
2-core cable (unshielded)
0.3 to 1.25 E [AWG 22 to AWG 16]
Outdoor
unit
Pull box
2
1.25mm × 2
[AWG16]
1.6mm × 2
[AWG14]
Indoor unit
2
0.5~1.25mm × 2
[AWG20 ~ AWG16]
101 101
M-NET remote controller
Remote controller used in system control operations.
• Group operation involving different refrigerant systems.
• Linked operation with upper control system.
2 wires (non-polar)
Grounded
Remote controller wire
Group operation