14
Installation Procedure
Installation Procedure
• You must keep the cable in a protection tube.
• Keep distances of 50mm or more between power cable
and communication cable.
• 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 (ELCB or 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 out-side 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.
• See the table below for tightening torque for the
terminal screws.
Tightening torque
N•m kgf•cm
M 3.5 0.8 ~ 1.2 8.0 ~ 12.0
M 4 1.2 ~ 1.8 12.0 ~ 18.0
Step 12 Optional: Extending the power
cable
1 Prepare the following tools.
Tools Spec Shape
Crimping pliers MH-14
Connection sleeve
(mm)
20xØ6.5 (HxOD)
Insulation tape Width 19 mm
Contraction tube
(mm)
70xØ8.0 (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.
• If cable wires are connected without using connecting
sleeves, their contact area becomes reduced, or
corrosion develops on the outer surfaces of the wires
(copper wires) over a long time. This may cause an
increase of resistance (reduction of passing current)
and consequently may result in a fire.
20 20 20
60
120
Power cable
202020
60
120
Pre-installed
tube for the
power cable
(Unit: mm)
DB68-08953A-00_IM_DVM QMD_EU_EN_.indd 14 2020-02-10 오후 4:23:08
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