Samsung AVXDB*022** Installation Manual page 25

Specification of electronic wire
Power supply MCCB
Max : 242V X A, 30mmA
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 Coef×35.6×L
∑ (
k=1
coef: 1.55
: Distance among each indoor unit[m], A
L
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
10[A]
ELB MCCB
0[m]
 Apply following equation.
Coef×35.6×L
n
∑ (
1000×A
k=1
Calculation

Installing with 1 sort wire.

2.5[mm ]
2
-2.2[V]
220[V]
-(2.2+2.0+1.8+1.5+1.3+1.1+0.9+0.7+0.4+0.2)=-11.2[V]
Installing with 2 different sort wire.

4.0[mm ]
2
-1.4[V]
220[V]
-(1.4+1.2+1.8+1.5+1.3+1.1+0.9+0.7+0.4+0.2)=-10.5[V]
ELB Power cable Earth cable
2
2.5mm 2.5mm
0.1 sec
×i
10% of input
k k
) <
voltage[V]
1000×A
k
: Power cable specification[mm
k
9[A]
Indoor unit1
10[m]
×i
10% of input
k k
) <
voltage[V]
k
2.5[mm ]
2
-2.0[V]
4.0[mm ] ············ 2.5[mm
2
-1.2[V]
Communication
cable
2 2
0.75~1.5mm
2
]
Indoor unit2
20[m]
············ 2.5[mm ] ············
2
208.8[V](Within 198V~242V)
it's okay
] ············
2
209.5[V](Within 198V~242V)
it's okay
Rating current
Unit Model Rating current
AVXDB
022
028
036
056
071
AVXDS
022
028
036
045
056
071
112
128
140
1[A]
Indoor unit10
100[m]
0.50A
0.55A
0.57A
0.76A
0.90A
0.40A
0.40A
0.40A
0.60A
0.60A
0.60A
1.00A
1.20A
1.20A
25
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