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Installation Procedure
• Since it has the external power supply, refer to the
outdoor unit installation manual for MAIN POWER.
CAUTION
• When installing the indoor unit in a computer
room or network room, use the double shielded
communication cable (tape aluminum / polyester
braid + copper) of FROHH2R type.
• 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 incorporated in the fixed wiring
• 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.
16
English
Step 13 Optional: Extending the power
cable
1 Prepare the following tools.
Tools
Spec
Crimping pliers
MH-14
Connection sleeve
20xØ6.5
(mm)
(HxOD)
Width 19
Insulation tape
mm
Contraction tube
70xØ8.0
(mm)
(LxOD)
2 As shown in the figure, peel off the shields from the
rubber and wire of the power cable.
• Peel off 20 mm of cable shields from the pre-
installed tube.
CAUTION
• For information about the power cable
specifications for indoor and outdoor units, refer to
the installation manual.
• After peeling off cable wires from the pre-installed
tube, insert a contraction tube.
Power cable
20
Pre-installed tube for the power cable
(Unit: mm)
20
Shape
20
20
60
120
180
(Unit: mm)
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