Restrictions And Notes On Ac Power Supply Wiring; Restrictions And Notes On Transmission Wiring - Mitsubishi Electric AE-200A Service Handbook

[III System restrictions and notes]

[3] Restrictions and Notes on AC Power Supply Wiring

(1) Notes
1. Perform electrical work in accordance with the instructions in the installation manual.
2. To prevent electrical noise from the power supply wiring affecting the wiring for transmission (control), lay the power supply wiring
at least 5 cm (2 in) apart if laying the wiring in parallel.
(Do not insert them in the same conduit.)
3. Be sure to connect the ground wire for protection.
4. Select electrical wiring that meets the requirements in the following table.
Recommended power
cable type
Power cable size

[4] Restrictions and Notes on Transmission Wiring

(1) Notes
1. Perform electrical work in accordance with the instructions in the installation manual.
2. To prevent the wiring for transmission (control) from being affected by electrical noise from the power supply wiring, lay the wiring
for transmission (control) at least 5 cm (2 in) apart from the power supply wiring.
(Do not insert them in the same conduit.)
3. Never connect a 100 V or 200 V power supply to the terminal block for the transmission wiring. In the event that a power supply
is connected, the electrical components will burn out.
4. Use a 2-core shielded cable for the transmission wiring. Never use the same cable with multiple cores for wiring multiple systems
because the transmission signals will become unable to be sent and received normally, resulting in erroneous operation.
(2) M-NET transmission line
The type and tolerance of wiring differ depending on the system configuration. Furthermore, if the transmission line is long and there
is a noise source within the vicinity of a unit, move the noise source away from the unit to prevent noise interference.
Transmission line type*1
Maximum length for
indoor/outdoor transmission
line
Farthest distance for
M-NET transmission line
(maximum length via an
outdoor unit)
*1 PE: Polyethylene, PVC: Polyvinyl chloride
(3) Remote controller line
Type
Number
Wiring type
of wires
Wire
diameter
Total length
*1 MA remote controllers include simple MA remote controllers and wireless remote controllers.
*2 M-NET remote controllers refer to ME remote controllers and LOSSNAY remote controllers.
*3 A wire diameter of up to 0.75 mm
*4 When connecting an MA remote controller, use a 0.3 mm
*5 When connecting to the terminal block of a simple MA remote controller, use wire with a diameter within the parentheses.
*6 Maximum 100 m (328 ft) when connecting a pair of remote controllers including an MA remote controller.
VCT, VVF, VVR, or its equivalent
2
0.75 to 2.00 mm (ø1.0 to ø1.6 mm)
CPEVS ø1.2 to ø1.6 mm: PE insulated PVC jacketed shielded communication cable
CVVS, MVVS 1.25 to 2 mm
Max. 200 m (656 ft)
Max. 500 m (1640 ft)
* The maximum wire length from the transmission line power supply unit installed for the
centralized control transmission line to each outdoor unit and system controller is 200 m (656 ft).
MA remote controller*1
VCTF, VCTFK, CVV, CVS,
VVR, VVF, VCT
2-core cable
2
0.3 to 1.25 mm *3*4
2
(0.75 to 1.25 mm )*5
Max. 200 m (656 ft)*6
2
is recommended.
2
: PVC insulated PVC jacketed shielded control cable
M-NET remote controller*2
10 m (32 ft) or less
Shielded wire CVVS,CPEVS,MVVS
2
0.3 to 1.25 mm *3*4
2
(0.75 to 1.25 mm )*5
Max. 10 m (32 ft)
2
cable with a sheath for the wiring.
17
If 10 m (32 ft) is exceeded
2-core cable
2
At least 1.25 mm
The portion that exceeds 10 m
(32 ft) must be included in the
calculation for the maximum
length of the indoor/outdoor
transmission line.