Mitsubishi Electric PU(H)Y-P250YGM-A, Service Handbook

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[
II
Restrictions ]
(2) Control wiring
Different types of control wiring are used for different systems.
Refer to section "[4] An Example of a System to which an MA Remote Controller is connected " before performing wiring
work.
[Types and maximum allowable length of cables]
Control lines are categorized into 2 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 given system has a long transmission line
or if a noise source is located near the unit, place the unit away from the noise source to reduce noise interference.
1) M-NET transmission line
2) Remote controller wiring
*1 The use of cables that are smaller than 0.75mm
2
is recommended for easy handling.
Cable type
Facility
type
All facility types
Type Shielded cable CVVS, CPEVS, MVVS
Number of
cores
2-core cable
Cable size Larger than 1.25mm
2
Maximum transmission
line distance between the
outdoor unit and the far-
thest indoor unit
200 m max.
Maximum transmission
line distance for central-
ized control and Indoor/
outdoor transmission line
(Maximum line distance
via outdoor unit)
500 m max.
*The maximum overall line length from the power supply unit on the transmission lines for
centralized control to each outdoor unit or to the system controller is 200m max.
MA remote controller
Cable type
Type
VCTF, VCTFK, CVV, CVS,
VVR, VVF, VCT
Number of
cores
2-core cable
Cable size 0.3 to 1.25mm
2 *1
Maximum overall line
length
200 m max.