Mitsubishi Electric PUHY-P250YHM-A, Data Book

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(2) Switch settings and address settings
The need for switch settings depends on the system configuration. Be sure to read the section "4. An
Example of a System to which an MA Remote Controller is connected" before starting wiring work.
Set the switches with the power to the unit turned off.
Changes that are made to the settings while the unit is being energized will not take effect, and the unit
will not function properly.
87
3. M-NET control
Control wiring depends on system configurations.
Be sure to read the section "4. An Example of a System to which an MA Remote Controller is connected"
before starting wiring work.
(1) Types and maximum allowable length of cables
Control lines are categorized into two types: transmission line and remote controller line. Use the
appropriate type of cables and observe the maximum allowable length specified for a given system.
If a noise source is located near the unit, place the unit as far away from the noise source as possible to
reduce noise interference.
2
Remote controller wiring
Cable type
Maximum total transmission line length
Type
Number of cores
Cable size
MA remote controller
2-core cable
VCTF,VCTFK,CVV
CVS,VVR,VVF,VCT
The use of cables that are 0.75 mm
2
[AWG 18] or smaller in diameter is
recommended for easy handling.
(Note.1)
0.3~1.25 mm 2 [AWG22 to 16]
( Note 1 )
200 m[656 ft] max.
Facility type
Maximum transmission line distance between
the outdoor unit and the farthest indoor unit
Maximum transmission line distance for central
control and Indoor-outdoor transmission line
(Maximum line distance via outdoor unit )
200 m[656 ft] max.
500 m[1640 ft] max.
*The maximum line distance from the power supply unit on
the transmission line for central control to each outdoor unit
or to the system controller is 200 m[656 ft] .
Cable type
Type
Number of cores
Cable size
All facility types
Shielded cable
CVVS·CPEVS·MVVS
2-core cable
1.25 mm
2
[AWG 16] min.
1
Transmission line (M-NET transmission line)