Design For Control Wiring; Wiring Transmission Cables; Selection Number Of Control Wires; Types Of Control Cables - Mitsubishi Electric PUMY-P250YBM Technical & Service Manual

9-3. DESIGN FOR CONTROL WIRING

Please note that the types and numbers of control wires needed by the Power Multi series will depend on the remote
controllers 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

9-4. WIRING TRANSMISSION CABLES

9-4-1. Types of control cables

1. Wiring transmission cables
Types of transmission cables
Cable diameter
Maximum wiring length
2. M-NET Remote control cables
Types of remote control cables Shielding wire (2-core) CVVS, CPEVS, or MVVS
Cable diameter
Remarks
3. MA Remote control cables
Type of remote control cable
Cable diameter
Remarks
* Connected with simple remote controller.
9-4-2. Wiring examples
Controller name, symbol and allowable number of controllers.
•
Name Symbol
Outdoor unit controller
Indoor unit controller
Branch box
Remote controller
9-5. SYSTEM SWITCH SETTING
In order to identify the destinations of signals to the outdoor units, indoor units, and remote controller of the Power Multi 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.
OCH760
Use
Shielding wire (2-core) CVVS, CPEVS or MVVS
More than 1.25 mm
2
Within 200 m
0.5 to 1.25 mm
2
If the length exceeds 10 m, use a cable with the same specifications
as transmission line wiring.
Sheathed 2-core cable (unshielded) CVV
2
0.3 to 1.25 mm (0.75 to 1.25 mm
Within 200 m
Allowable number of controllers
OC
PUMY-P250
M-IC 1 to 30 units per 1 OC
PUMY-P300
PUMY-P250
A-IC 2 to 12 units per 1 OC
PUMY-P300
– – 0 to 3 units per 1 OC
Maximum of 30 controllers for 1 OC
M-NET RC
(Cannot be connected if a branch box is used.)
RC
MA-RC Maximum of 2 per group
M-NET remote controller
Remote controller used in system control operations
• Group operation involving different refrigerant systems
• Linked operation with upper control system
2-core wire (non-polar)
)*
2
–
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