14
Wiring works
Example of Installation
f
Total power cable length L = 328ft (100m), Running current of each units 1[A]
f
Total 10 indoor units were installed
❈
Installing a separated power supply for DVM HYDRO UNIT HT.
208.8[V](Within 198V~242V)
it's okay
209.5[V](Within 198V~242V)
it's okay
❈
Calculation
- Installing with 1 sort wire
❈
If the terminal input pressure of the indoor unit goes down by more than 10%, install the thicker wire.
- Installing with 2 different sort wire
220[V]
-2.2[V]
-2.0[V]
············ 0.0039inch
2
(2.5mm
2
) ············
-(2.2+2.0+1.8+1.5+1.3+1.1+0.9+0.7+0.4+0.2)=-11.2[V]
0.0039inch
2
(2.5mm
2
)
0.0039inch
2
(2.5mm
2
)
220[V]
-1.4[V]
-1.2[V]
············ 0.0039inch
2
(2.5mm
2
) ············
-(1.4+1.2+1.8+1.5+1.3+1.1+0.9+0.7+0.4+0.2)=-10.5[V]
0.0062inch
2
(4.0mm
2
)
0.0062inch
2
(4.0mm
2
)
f
Apply following equation.
∑
(
Coef×35.6×L
K
×i
K
) <
10% of input voltage[V]
1000×A
K
n
k=1
Indoor unit
Power supply
MCCB [A]
ELB [A]
Power cable (mm
2
)
Earth cable
(mm
2
)
Communication cable
(mm
2
)
DVM Hydro
unit
1Ø,
220~240 V/50 Hz
Max : 264 V
Min : 198 V
X [A]
X [A],
30 mA,
0.1 sec
0.0039 inch
2
(2.5 mm
2
)
(Single Installation)
0.0039 inch
2
(2.5 mm
2
)
0.0012~0.0023 inch
2
(0.75~1.5 mm
2
)
DVM Hydro
unit HT
1Ø,
220~240 V/50 Hz
Max : 264 V
Min : 198V
X [A]
X [A],
30 mA,
0.1 sec
0.0062 inch
2
(4.0 mm
2
)
(Single Installation)
3Ø,
380~415 V/50 Hz
Max : 456.5 V
Min : 342 V
X [A]
X [A],
30 mA,
0.1 sec
0.0039 inch
2
(2.5 mm
2
)
(Single Installation)
10[A]
65.6ft (20m)
32.8ft (10m)
0 ft (0m)
9[A]
1[A]
328ft (100m)
MCCB
ELB
Indoor unit1
Indoor unit2
Indoor unit10
MCCB
+ ELB
ELCB
or
MCCB
+ ELB
ELCB
or
DVM Hydro
unit HT
DVM Hydro
unit HT
1 Phase
3 Phase
Exclusive wired remote controller
Exclusive wired remote controller
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