11 ELECTRICAL WIRING
11.1 GENERAL INFORMATION
!
D A N G E R
•
Turn off the main power switch to the indoor unit and the
outdoor unit before electrical wiring work or a periodical check
is performed.
•
Check to ensure that the indoor fan and the outdoor fan have
stopped before electrical wiring work or a periodical check is
performed.
•
Protect the wires, drain pipe, electrical parts, etc. from rats
or other small animals. If not protected, rats may gnaw at
unprotected parts and at the worst, a fire will occur.
•
Electrical wiring work must be performed by authorized
installers. Incorrect installation by a non-authorized installer
may cause an electric shock or a fire.
•
Perform electrical work according to this Installation Manual and
all the relevant regulations and standards. Failing to follow these
instructions can cause capacity shortage and performance
degradation, resulting in an electric shock and a fire.
•
Use specified cables between units. Selecting incorrect cables
may cause an electric shock or a fire.
•
Tighten screws according to the following torque:
-
M3.5: 1.2 N-m
-
M4: 1.0 to 1.3 N-m
!
C A U T I O N
•
Use twisted shielded pair cable or shield pair cable for transmission
wires between the indoor and the outdoor units, for the control cable
between indoor units and for the cable of remote control switch, and
connect the shielded part to the earth screw in the electrical box of
the indoor unit.
•
Wrap the field supplied insulation around the wires, and plug the
wiring connection hole with the seal material to protect the product
from any condensate water or insects.
•
Tightly secure the wires with the cord clamp near the electrical box.
•
Lead the wires through the knockout hole in the side cover when
using conduit.
•
Secure the cable of the remote control switch using the cord clamp
inside the electrical box.
General check
1
Make sure that the field-selected electrical components
(main power switches, circuit breakers, wires, conduit
connectors and wire terminals) have been properly selected.
Make sure that the components comply with National
Electrical Code (NEC).
2
Check to ensure that the power supply voltage is within
+10% of the rated voltage.
3
Check the capacity of the electrical wires. If the power
source capacity is too low, the system cannot be started due
to the voltage drop.
4
Check to ensure that the ground wire is connected.
11.2 ELECTRICAL WIRING CONNECTION FOR INDOOR UNIT
1
The electrical wiring connection for the indoor unit is shown
below.
Electrical box
Remote control switch cable
Control cable
Power source cable
Indoor unit
Air panel
Cable for auto swing motor
Wire clamp
?
N O T E
Fix the wires with the cord clamps. Be careful that the wires does not
contact the edges of the cover for the electrical components.
2
When installing the optional air panel, connect the connector
for the auto swing motor and the connector for the indoor
unit. Refer to the section
"12 Installation of optional air
for details.
Electrical box
Wire clamp
Air panel
Indoor unit
Earth screw
Power source
cable
PCB
Cable for:
auto swing motor (CN7)
motion sensor (CN10)
Connector (CN7)
Connector (CN10)
?
N O T E
Fix the wires by wire clamp. Be careful that the wires does not contact
the edges of the cover for the electrical components the edges of the
suspension bracket and drain pipe.
ELECTRICAL WIRING
PMML0477 rev.1 - 10/2017
20
