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Wiring Work
Decide the power cable specification and maximum length within 10% power drop among the indoor units.
❋ coef: 1.55
❋ Lk: Distance among each unit [m], Ak: Power cable specification [mm
ik: Running current of each unit [A]
Example of Installation
- Total power cable length L = 328ft (100m), Running current of each units 1[A]
- Total 10 indoor units were installed
MCCB
ELB
0ft (0m)
Use the following formula
n
Coef×35.6×Lk×ik
∑(
1000×Ak
k=1
❋ Calculation
Installing with 1 sort wire.
2
0.0039inch
(2.5mm
-2.2[V]
220[V]
Installing with 2 different sort wire.
2
0.0062inch
(4.0mm
-1.4[V]
220[V]
n
∑
(
k=1
10[A]
Indoor unit 1
32.8ft (10m)
) <
10% of input voltage [V]
2
0.0039inch
(2.5mm
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]
2
2
0.0062inch
(4.0mm
)
-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]
Coef×35.6×Lk×ik
1000×Ak
2
]
9[A]
Indoor unit 2
65.6ft 20(m)
2
)
············ 0.0039inch
2
············ 0.0039inch
)
ENGLISH-26
) <
10% of input voltage[V]
1[A]
328ft (100m)
2
2
(2.5mm
) ············
208.8[V] (Within 187V~253V)
It's okay
2
2
(2.5mm
) ············
209.5[V] (Within 187V~253V)
It's okay
Indoor unit 10
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