Installation manual

E-19
1
Before wiring work, you must turn off all power source.
2
Indoor unit power should be supplied through the breaker
( ELCB or MCCB+ELB ) separated by the outdoor power.
ELCB: Earth Leakage Circuit Breaker
MCCB: Molded Case Circuit Breaker
ELB: Earth Leakage Breaker
3
The power cable should be used only copper wires.
4
Connect the power cable{1(L), 2(N)} among the units within maximum
length and communication cable(F1, F2) each.
5
Connect V1, V2(for DC12V) and F3, F4(for communication) when installing
the wired remote control.
Unit Model Rating current
NDHH

200

3.3A

220

3.8A

280

5.9A
 Rating current
Specification of electronic wire
Power supply MCCB ELB or ELCB Power cable Earth cable
Communication
cable
Max : 242V
Min : 198V
X A
X A, 30mmA
0.1 sec
2.5mm
2
2.5mm
2
0.75~1.5mm
2
 Run transmission wiring between the indoor and outdoor units through a con-
duit to protect against external forces, and feed the conduit through the wall
together with refrigerant piping.
 Decide the capacity of ELCB(or MCCB+ELB) by below formula.
The capacity of ELCB(or MCCB+ELB) X[A] = 1.25 X 1.1 X
∑
Ai
 X : The capacity of ELCB(or MCCB+ELB).

∑
Ai : Sum of Rating currents of each indoor unit.
 Refer to each installation manual about the rating current of indoor unit.
 Decide the power cable specification and maximum
length within 10% power drop among indoor units.
 coef: 1.55
 Lk: Distance among each indoor unit[m]
A
k: Power cable specification[mm
2
]
ik: Running current of each unit[A]
∑ (
Coef×35.6×L
k×ik
) <
10% of input
voltage[V]
1000×A
k
n
k=1
Silver solder
Selecting compressed ring terminal
Norminal
dimensions for
cable (mm
2
)
Norminal
dimensions for
screw (mm)
B D d1 E F L d2 t
Standard
dimension
(mm)
Allowance
(mm)
Standard
dimension
(mm)
Allowance
(mm)
Standard
dimension
(mm)
Allowance
(mm)
Min. Min. Max.
Standard
dimension
(mm)
Allowance
(mm)
Min.
1.5
4 6.6
±0.2 3.4
+0.3
-0.2
1.7 ±0.2 4.1 6 16 4.3
+0.2
0
0.7
4 8
2.5
4 6.6
±0.2 4.2
+0.3
-0.2
2.3 ±0.2 6 6 17.5 4.3
+0.2
0
0.8
4 8.5
4 4 9.5 ±0.2 5.6
+0.3
-0.2
3.4 ±0.2 6 5 20 4.3
+0.2
0
0.9
Wiring Work
 When installing optional product, make sure to follow below current capacity.
 Optional product is not supplied by manufacturer.
AVXDU@@_IM_E_33764A-1_110621.indd 19 2011-06-23 오전 10:14:35