Samsung Duct Type Series, Руководство по установке, Страница: 20 / 40

20
Wiring work
f
Decide the power cable specification and maximum length within 10 % power drop among indoor units.
n
Coef×35.6×Lk×ik
10 % of input voltage[V] ∑( ) <
1000×Ak
k=1
• coef : 1.55
• Lk : Distance among each indoor unit[m], 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 ft), Running current of each units 1[A]
f
Total 10 indoor units were installed.
10[A]
Indoor unit 10
20[m](65.62 ft) 10[m](32.8 ft) 0[m]
9[A] 1[A]
100[m](328 ft)
Indoor unit 2 Indoor unit 1
ELCB
Or MCCB+
ELB
f Apply following equation.
n
Coef×35.6×L K ×i K
10 % of input voltage[V] ∑
(
) <
1000×A K
k=1
❋
Calculation
• Installing with 1 sort wire.
220[V]
-2.2[V] -2.0[V]
············ 2.5[mm 2 ](0.004 inch 2 ) ············
208.8[V](Within 187 V ~ 253 V)
-(2.2+2.0+1.8+1.5+1.3+1.1+0.9+0.7+0.4+0.2)=-11.2[V]
it's okay
2.5[mm 2 ](0.004 inch 2 ) 2.5[mm 2 ](0.004 inch 2 )
• Installing with 2 different sort wire.
220[V]
-1.4[V] -1.2[V]
············ 2.5[mm 2 ](0.004 inch 2 ) ············
209.5[V](Within 187 V ~ 253 V)
-(1.4+1.2+1.8+1.5+1.3+1.1+0.9+0.7+0.4+0.2)=-10.5[V]
it's okay
4.0[mm 2 ](0.006 inch 2 ) 4.0[mm 2 ](0.006 inch 2 )
How to connect your extended power cables
1. Prepare the following tools.
Tools Crimping pliers Connection sleeve (mm) Insulation tape Contraction tube (mm)
Spec MH-14 20xØ6.5(HxOD) Width 19mm 70xØ8.0(LxOD)
Shape