Samsung MCU-S4NEK3N - Wiring; Electrical Connections and Protection

Refrigerant piping
20
WiringWiring
Installing the circuit breaker and wires
Power supply MCCB ELB Power cable Earth cable Communication cable
Max : 242V
Min : 198V
x [A]
x [A], 30mmA
0.1 sec
0.0039inch
2
(2.5mm
2
)
0.0039inch
2
(2.5mm
2
)
0.0012~0.0023inch
2
(0.75~1.5mm
2
)
J x [A] ≥ 1.25 X 1.1 X ∑Ai
(x [A] : MCCB/ELB ampheres, ∑Ai : Sum of the rated current ampheres of indoors)
Installing the wire
X Supply the 220-240V/208-230V power to L1, L2 (L, N) of MCU separately
X Connect the communication cable from the outdoor unit to F1, F2 of MCU.
X Power Line and communication line must be connected as shown in drawing.
Case 1 Case 2
220-240V/208-230V / Single Phase
(Supply separately)
ELB
MCCB
Outdoor
Unit
Indoor
Unit
Indoor
Unit
MCU
ELB
MCCB
Outdoor
Unit
Indoor
Unit
Indoor
Unit
MCU
Indoor
Unit
220-240V/208-230V / Single Phase
(Supply separately)
MCU
Case 3
ELB
MCCB
Outdoor
Unit
Indoor
Unit
MCU
Indoor
Unit
Indoor
Unit
220-240V/208-230V / Single Phase
(Supply separately)
Indoor Unit
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