42
Specification of electric wire
10[A]
Indoor unit10
20[m]
10[m]
0[m]
9[A]
1[A]
100[m]
Indoor unit2
Indoor unit1
ELCB
or MCCB+
ELB
K
Rating current
Model
Rating
current
AM050FNKDEH
1.7A
AM100FNKDEH
3.7A
Power supply
MCCB
ELB or ELCB
Power cable
Earth cable
Communication cable
.BY7
.JO7
9 "
9 "NN"
0.1 s
2.5 mm
2
2.5 mm
2
0.75~1.5 mm
2
X
Decide the capacity of ELCB(or MCCB+ELB) by below formula.
7
9
: The capacity of ELCB(or MCCB+ELB).
7
∑Ai : Sum of Rating currents of each indoor unit.
7
Refer to each installation manual about the rating current of indoor unit.
X
D
ecide the power cable specification and maximum length within
10 % power drop among indoor units.
X
Apply following equation.
X
Installing with one size cable.
X
Installing with two size cables.
K
Calculation
5IFDBQBDJUZPG&-$# PS.$$#&-#9 <">99Ƅ"J
7
coef: 1.55
7
Lk: Distance among each indoor unit[m], Ak: Power cable specification[mm
2
]
ik: Running current of each unit[A]
∑ (
Coef×35.6×L
k
×i
k
) <
PGJOQVUWPMUBHF<7>
1000×A
k
n
L
Example of Installation
1. - Total power cable length L = 100(m), Running current of each units 1[A]
2. - Total 10 indoor units were installed
∑ (
Coef×35.6×L
k
×i
k
) <
10 % of input
WPMUBHF<7>
1000×A
k
n
L
<7>
<7>
<7>
············ 2.5[mm
2
] ············
<7> 8JUIJO7_7
<7>
it's okay
2.5[mm
2
]
2.5[mm
2
]
<7>
<7>
<7>
············ 2.5[mm
2
] ············
<7> 8JUIJO7_7
<7>
it's okay
4.0[mm
2
]
4.0[mm
2
]
Wiring work
