-
-
'14 • SR-T
-157
CAUTION
Always use an earth leakage circuit breaker designed for inverter circuits to
prevent a faulty operation.
Interconnecting and
grounding wires
(minimum)
Switch breaker
Over current protector
rated capacity
Power source
(minimum)
15A, 30mA,
0.1sec or less
30A
16A
2.0mm
2
1.5mm
2
X 4
Earth leakage breaker
Phase
Single-phase
• The specifications shown in the above table are for units without heaters. For units with heaters, refer to the
installation instructions or the construction instructions of the indoor unit.
• Switchgear or Circuit breaker capacity which is calculated from MAX. over current should be chosen along the
regulations in each country.
• The cable specifications are based on the assumption that a metal or plastic conduit is used with no more than
three cables contained in a conduit and a voltage drop is 2%. For an installation falling outside of these
conditions, please follow the internal cabling regulations. Adapt it to the regulation in effect in each country.
Switchgear or Circuit Breaker
Power cable, indoor-outdoor connecting wires
• Always perform grounding system installation work with the power cord unplugged.
• Connect a pair bearing a common terminal number with an indoor-outdoor connecting wire.
• In cabling, fasten cables securely with cable clamps so that no external force may work on terminal connections.
• Grounding terminals are provided in the control box.
N L
1 2/N 3
1 2/N 3
Safety
breaker
16A
Earth
leakage
circuit
breaker
h
t
r
a
E
h
t
r
a
E
Power
supply
Indoor unit
Outdoor unit
When wire length
exceeds 30m, use
2.5mm
2
wires.
Model SRC-ZM-S
Model SRC-ZMX-S
N L
D1 D2 D3 C
D1 D2 D3
Safety
breaker
16A
Earth
leakage
circuit
breaker
Power
supply
DRED*
Outdoor unit
1 2/N 3
1 2/N 3
Indoor unit
When wire length
exceeds 30m, use
2.5mm
2
wires.
Model SRC-ZMA-S
Model SRC-ZMXA-S
Model DXC-ZMA-S
C
Connecting cable between outdoor unit
and DRED shall be double insulation
layer, polychloroprene sheathed (>50V)
with size 4 x (0.5mm
2
to 2.0mm
2
)
cable or flexible cord, where the
maximum allowable length is 30m.
*Demand
response
enabling
devices
Power cable, indoor - outdoor connecting wire circuit diagram
Model SRC20~35ZM-S
Model SRC20~35ZMX-S
Model SRC20~35ZMA-S
Model SRC20~35ZMXA-S
Model DXC09,12ZMA-S
Model SRC50ZM-S
Model SRC50ZMA-S
Model DXC18ZMA-S
Power cable
Indoor - Outdoor
connecting wire
Indoor - Outdoor
connecting wire
DRED cable
(Demand response
enabling devices)
Power cable
Indoor - Outdoor
connecting wire
Indoor - Outdoor
connecting wire
Power cable
DRED cable
(Demand response
enabling devices)
Power cable
• Earth wire shall
be Yellow/Green
(Y/G) in color
and longer than
other AC wires
for safety reason.
• Earth wire shall
be Yellow/Green
(Y/G) in color
and longer than
other AC wires
for safety reason.
Cable name plate
• It holds cables in place and protect the terminal connection
from external force.
• This clamp is for the cable in the outside diameter 9
~
15mm.
Please adjust it when not suitable.
• Please be sure to carry out D-type (type III) grounding work.
• It has stuck on the lid of a control box.
Grounding terminal
Power supply terminal block
Cable clamp
