Wiring work
40
English
Installation manual
Example of Installation
Total power cable length L = 100(m), Initial pull-in current = 10[A], Running current of each units = 1[A], Total 10 indoor units
were installed
MCCB+ELB
10 [A]
9 [A]
1 [A]
100[m]10[m] 20[m]0[m]
Indoor unit 10
Indoor unit 1
Indoor unit 2
or
ELCB
• Apply following equation.
n
Coef×35.6×Lk
× ik) < 10% of input voltage[V]
∑ (
1000×Ak
k=1
• Calculation
– Installing with 1 sort wire.
2.5 [mm
2
]
-2.2 [V]
220 [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 [V]
2.5 [mm
2
]
······· 2.5 [mm
2
] ·······
Within 198V
to 242V
208.8 [V] : Applicable
– Installing with 2 different sort wire.
4.0 [mm
2
] 4.0 [mm
2
]
-1.2 [V]
-1.2 [V]
220 [V]
-(1.4+1.2+1.8+1.5+1.3+1.1+0.9+0.7+0.4+0.2)=-10.5 [V]
······· 2.5 [mm
2
] ·······
Within 198V
to 242V
209.5 [V] : Applicable
CAUTION
• Select the power cable in accordance with relevant local
and national.
• Wire size must comply with local and national code.
• You should connect the power cable into the power cable
terminal and fasten it with a clamp.
• The unbalanced power must be maintained within 10% of
supply rating among whole indoor units.
• If the power is unbalanced greatly, it may shorten the life
of the condenser. If the unbalanced power is exceeded over
10% of supply rating, the indoor unit is protected, stopped
and the error mode indicates
• Connect the power cable to the auxiliary circuit breaker.
An all pole disconnection from the power supply must be
• You must keep the cable in a protection tube.
• Maximum length of power cables are decided within 10%
of power drop. If it exceeds, you must consider another
power supplying method.
• The circuit breaker(MCCB, ELB) should be considered
more capacity if many indoor units are connected from
one breaker.
• Use round pressure terminal for connections to the power
terminal block.
• For wiring, use the designated power cable and connect
it firmly, then secure to prevent outside pressure being
exerted on the terminal board.
• Use an appropriate screwdriver for tightening the terminal
screws. A screwdriver with a small head will strip the head
and make proper tightening impossible.
• Over-tightening the terminal screws may break them.
WARNING
• In case of extending the electric wire, please DO NOT
use a round-shaped Pressing socket.
– Incomplete wire connections can cause electric
shock or a fire.
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