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Power supply wire and communication wires specifications
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Power supply wire and communication wires are locally procured.
For the power supply specifications, follow to the table below. If capacity is little, it is dangerous because overheat
or burnout may be caused.
For specifications of the power capacity of the outdoor unit and the power supply wires, refer to the Installation
Manual attached to the outdoor unit.
Indoor unit power supply
• For the power supply of the indoor unit, prepare the exclusive power supply separated from that of the outdoor
unit.
• Arrange the power supply, circuit breaker, and main switch of the indoor unit connected to the same outdoor
unit so that they are commonly used.
• Power supply wire specifi cation: Cable 3-core AWG12, in conformity with Design 60245 IEC 57.
Power supply
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Power supply
Power supply switch / circuit breaker or power supply wiring / fuse rating for indoor units should be selected by the
accumulated total current values of the indoor units.
Power supply wiring
Below 164'1''(50 m)
Control wiring, Central controller wiring
• 2-core with polarity wires are used for the Control wiring between indoor unit and outdoor unit and Central
controller wiring.
• To prevent noise trouble, use 2-core shield wire.
Communication line
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TU2C-Link models (U series) can be combined with TCC-Link models (other than U series).
For details of communication type, refer to the following table.
Communication type and model names
Communication
type
(U series and future models)
MMY-MUP
Outdoor unit
This letter indicates U series model.
MM -UP
Indoor unit
This letter indicates U series model.
RBC-A
U
Wired remote
controller
This letter indicates U series model.
RBC-AXU
Wireless remote
controller kit &
receiver unit
This letter indicates U series model.
U series outdoor unit : SMMS-u (MMY-MUP
Other than U series outdoor unit : SMMS-i, SMMS-e etc. (MMY-MHP
35-EN
208/230-1-60Hz
3 × AWG12 (power supply and earth)
TU2C-Link
TCC-Link
(Other than U series)
Other than U series
MMY-MHP
, MMY-MAP
MCY-MHP
Other than U series
MM -AP
Other than U series
Other than U series
)
, MMY-MAP
)
<In the case of combining with outdoor units of Super Modular Multi System u series (SMMS-u)>
Uv line and Uc line (L2, L3, L4)
(2-core shield wire, non-polarity)
Uh line (L1)
(2-core shield wire, non-polarity)
• U (v, h, c) line means of control wiring.
Uv line : Between indoor and outdoor units.
Uh line : Central control line.
Uc line : Between outdoor and outdoor units.
• Uv line and Uc line are independent from another refrigerant line. Total length of Uv and Uc lines
(L3+L4) in each refrigerant line is up to 3280'10'' (1000 m).
REQUIREMENT
For connection of Uv line / Uc line or Uh line, wire each line using wires with the same type and size.
If different wire types and size are mixed and used in a system, communication trouble is caused.
Central control device
<U series>
Outdoor unit
(SMMS-u)
<U series>*
Indoor unit
<U series>*
Remote controller
* Even if the indoor unit and the remote controller are "other than U series", the wiring
specification are the same.
– 18 –
Wire size :
AWG18 to AWG16
(Up to 3280'10'' (1000 m))
AWG18 to AWG16
(Up to 3280'10'' (1000 m))
Wire size :
AWG14
(Up to 6561'8'' (2000 m))
[Uh line]
L1 = Up to 6561'8'' (2000 m)
[Uv and Uc line]
L2 = Up to 3280'10'' (1000 m)
(L3+L4) = Up to 3280'10'' (1000 m)
EN
FR
ES
36-EN
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