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Electrical connection
WARNING
1. Use predefined wire and connect them certainly.
Keep the connecting terminal free from external
force.
Improper wire connection or clamping may result in
exothermic, fire or malfunction.
2. Connect grounding wire. (grounding work)
Incomplete grounding cause an electric shock.
Do not connect grounding wires to gas pipes, water
pipes, lightning rods or grounding wires for telephone
wires.
3. The appliance shall be installed in accordance
with national wiring regulation.
Capacity shortage of circuit breaker or incomplete
installation may cause an electric shock or a fire.
4. Means for full disconnection under overvoltage
category III conditions must be incorporated in the
fixed wiring according tonational wiring rules.
CAUTION
• Consult local building codes, NEC (National
Electrical Code) or CEC (Canadian Electrical
Code) for special requirements.
• If incorrect / incomplete wiring is carried out, it will
cause an electrical fire or smoke.
• Install circuit breaker is not tripped by shock
waves.
If circuit breaker is not installed, an electric shock
may be caused.
• Use the cord clamps attached to the product.
• Do not damage or scratch the conductive core and
inner insulator of power and control wires when
peeling them.
• Use the power cord and control wire of specified
thickness, type, and protective devices required.
• Do not connect 208/230V power to the terminal
blocks (Uv (U1)), (Uv (U2)), (A), (B) for control
wiring. (Otherwise, the system will fail.)
• Perform the electric wiring so that it does not come
to contact with the high-temperature part of the
pipe.
The coating may melt resulting in an accident.
• Do not turn on the circuit breaker of the indoor unit
until vacuuming of the refrigerant pipes completes.
REQUIREMENT
• For power supply wiring, strictly conform to the
Local Regulation in each country.
• Run the refrigerant piping line and control wiring
line in the same line.
27-EN
Power supply wire and
control wires specifications
Power supply wire and control wires are locally
procured.
For the power supply specifications, follow to the table
below. If capacity is little, it is dangerous because
overheat or seizure may be caused.
Indoor unit power supply
For the power supply of the indoor unit, prepare the
exclusive power supply separated from that of the
outdoor unit.
Power supply
Power supply
208/230-1-60
Control wiring, Central control wiring
• 2-core with non-polarity wires are used for the
control wiring between indoor unit and outdoor unit
and Central control wiring.
• To prevent noise trouble, use 2-core shielded wire.
• The length of the communication line means the
total length of the control wire length between indoor
and outdoor units added with the central control wire
length.
Power supply wire
Recommended wire diameter and wire length for power supply wire.
Power supply wiring
Electric characteristics
Model
Power Supply
MMU-UP0071HP-UL
MMU-UP0091HP-UL
MMU-UP0121HP-UL
MMU-UP0151HP-UL
MMU-UP0181HP-UL
208/230V-1-60 Hz
MMU-UP0241HP-UL
MMU-UP0301HP-UL
MMU-UP0361HP-UL
MMU-UP0421HP-UL
MMU-UP0481HP-UL
MMU-UP0541HP-UL
Control wire
Control wiring between indoor units, and outdoor unit
(2-core shielded wire)
Communication line
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.
Wireless remote
RBC-AXU
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
– 14 –
Wire size: 2 × AWG12
Up to 164'1" (50 m)
Ground
1 × AWG12 or thicker
Voltage Range (V)
MCA
Min
Max
(A)
0.79
0.79
0.79
1.00
1.00
187
253
1.09
1.09
1.44
1.44
1.44
1.44
(Up to 3280'10" (1000 m)) AWG16
Wire size
(Up to 6561'8" (2000 m)) AWG14
TU2C-Link
TCC-Link
(Other than U series)
Other than U series
MMY-MHP
MCY-MHP
MMY-MAP
Other than U series
MM -AP
Other than U series
Other than U series
)
)
MOCP
(A)
15
15
15
15
15
15
15
15
15
15
15
EN
28-EN
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