Wiring Works - Samsung MCU-Y6NEE Installation Manual

Wiring works

Installing the circuit breaker and wires
Power supply MCCB
Max : 242V
X A
Min : 198V
Decide the capacity of ELB and MCCB by below formula.

The capacity of ELB, MCCB X[A] = 1.25 X 1.1 X ∑Ai
X : The capacity of ELB, MCCB
❈
∑Ai : Sum of Rating currents of each indoor unit.
❈
Refer to each installation manual about the rating current of indoor unit.
❈
Decide the power cable specification and maximum length within 10% power drop among indoor units.

n
(
∑
k=1
T Coef: 1.55
L : Distance among each indoor unit[m], Ak: Power cable specification[mm
T
k
i : Running current of each unit[A]
k
Example of Installation
 Total power cable length L = 100(m), Running current of each units 1[A]
 Total 10 indoor units were installed
ELB MCCB
0[m]
 Apply following equation.
Coef×35.6×L
n
(
∑
k=1
Calculation
❈
- Installing with 1 sort wire
2.5[mm ]
2
-2.2[V]
220[V]
- Installing with 2 different sort wire
4.0[mm ]
2
-1.4[V]
220[V]
If the terminal input pressure of the indoor unit goes down by more than 10%, install the thicker wire.
❈
ELB Power cable Earth cable
X A, 30mmA
2.5mm
2
0.1 sec
Coef×35.6×L ×i
k k
1000×A
k
10[A]
Indoor unit1
10[m]
×i
k k
) <
10% of input voltage[V]
1000×A
k
2.5[mm ]
2
-2.0[V]
-(2.2+2.0+1.8+1.5+1.3+1.1+0.9+0.7+0.4+0.2)=-11.2[V]
4.0[mm ]
2
-1.2[V]
-(1.4+1.2+1.8+1.5+1.3+1.1+0.9+0.7+0.4+0.2)=-10.5[V]
Communication cable
2.5mm 0.75~1.5mm
2
) <
10% of input voltage[V]
9[A]
Indoor unit2
20[m]
············ 2.5[mm
············ 2.5[mm
2
]
2
1[A]
] ············
2
208.8[V](Within 198V~242V)
it's okay
] ············
2
209.5[V](Within 198V~242V)
it's okay
Indoor unit10
100[m]
17