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ENGLISH
❋
Table for current (Single installation)
Indoor unit
Model
Rated current (A)
MCA ( A)
MFA( A)
DVM Hydro unit
ADN
✴✴✴
BDE
✴✴
AM
✴✴✴
FNBD
✴✴
0.05
2.2
2.75
DVM Hydro unit HT
AM160FNBFE
✴
14.3
24.15
30.19
AM250FNBFE
✴
23.1
32.15
40.19
AM160FNBFG
✴
4.85
12.88
16.1
AM250FNBFG
✴
7.85
12.88
16.1
f
ELB, MCCB capacity expression
X [A] = 1.25 X ∑Ai
❋
X [A] : ELB, MCCB capacity
❋
∑Ai : Sum of each indoor unit's rated current
❋
Refer to each installation manual about the rating current of indoor unit.
f
Decide the power cable specification and maximum length within 10 % power drop among indoor units.
n
∑(
k=1
Coef×35.6×Lk×ik
) < 10 % of input voltage[V]
1000×Ak
t
coef : 1.55
t
Lk : Distance among each indoor unit [m], Ak : Power cable specification [mm
2
]
ik : Running current of each unit [A]
Example of Installation
f
Total power cable length L = 100(m), Running current of each units 1[A]
f
Total 10 indoor units were installed
10[A]
Indoor unit 10
20[m]
10[m]
0[m]
9[A]
1[A]
100[m]
Indoor unit 2
Indoor unit 1
ELCB
MCCB+
ELB
Or
f
Apply following equation
n
∑(
k=1
Coef×35.6×Lk×ik
) < 10 % of input voltage[V]
1000×Ak
❋
Calculation
t
Installing 1 type of wire.
220[V]
-2.2[V]
-2.0[V]
············ 2.5[mm
2
] ············
208.8[V](Within 198 V~242 V)
-(2.2+2.0+1.8+1.5+1.3+1.1+0.9+0.7+0.4+0.2)=-11.2[V]
it's okay
2.5[mm
2
]
2.5[mm
2
]
t
Installing with 2 different sort wire.
220[V]
-1.4[V]
-1.2[V]
············ 2.5[mm
2
] ············
209.5[V](Within 198 V~242 V)
-(1.4+1.2+1.8+1.5+1.3+1.1+0.9+0.7+0.4+0.2)=-10.5[V]
it's okay
4.0[mm
2
]
4.0[mm
2
]
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