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Connecting power and communication cable
Specification of electric wires
Indoor unit
Power supply
MCCB
ELB
Power cable
Earth cable
Communication cable
DVM Hydro unit
208~230V/60 Hz
Max: 253 V
Min: 187 V
20 A
25 A,
30 mA,
0 .1 sec
10 AWG
(Single Installation)
10 AWG
20 AWG~14 AWG
DVM Hydro unit HT
(AM048CNBFCB)
208~230V/60 Hz
Max: 253 V
Min: 187 V
30 A
30 A,
30 mA,
0 .1 sec
6 AWG
(Single Installation)
DVM Hydro unit HT
(AM072CNBFCB)
50 A
50 A,
30 mA,
0 .1 sec
❋
Table for current (Single installation)
Indoor unit
Model
Rated current (A)
MCA ( A)
MOP (Min. ELCB, MCCB, A)
DVM Hydro unit
AM
✴✴✴
CNBD
✴✴
0 .05
2 .2
15 .0
DVM Hydro unit HT
AM048CNBF
✴✴
14 .3
18 .0
25 .0
AM072CNBF
✴✴
23 .1
30 .0
40 .0
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
• coef : 1 .55
• Lk : Distance among each indoor unit [m
(inch)], Ak: Power cable specification [mm
2
(inch
2
)]
ik : Running current of each unit [A]
Example of Installation
f
Total power cable length L = 100 m (328 .1 ft), Running current of each units 1[A]
f
Total 10 indoor units were installed
10[A]
Indoor unit 10
20 m (65 .6 ft)
10 m (32 .8 ft)
0 m (0 ft)
9[A]
1[A]
100 m (328 .1 ft)
Indoor unit 2
Indoor unit 1
ELCB
MCCB+
ELB
Or
DB68-12327A-00_IM_DVM Hydro HT_AA_EN_.indd 28
DB68-12327A-00_IM_DVM Hydro HT_AA_EN_.indd 28
2023-06-15 오전 10:37:26
2023-06-15 오전 10:37:26
