5
ELECTRICAL WIRING
5
5.
ELECTRICAL WIRING
5.1.
GENERAL
Õ
DANGER
:
-
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.
CAUTION:
-
Use twisted shielded pair cable or shield pair cable
for transmission wires between the indoor and the
outdoor units, and connect the shielded part to the
earth screw in the electrical box of the indoor unit as
shown below.
-
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 inside
the indoor unit.
-
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.
5.2.
ELECTRICAL WIRING CONNECTION FOR INDOOR UNIT
1. The electrical wiring connection for the indoor unit is
shown below.
2. Connect the cable of an optional remote control switch
or an optional extension cable to the terminals inside the
electrical box through the connecting hole in the cabinet.
3. Connect the power supply and earth wires to the
terminals in the electrical box.
4. Connect the wires between the indoor unit and the
outdoor unit to the terminals in the electrical box.
Electrical Box
Stopper (Metal)
Power Source Wiring
Transmission Wiring
Remote Control Switch Cable
Transmission Wiring
(between Indoor Unit
and Outdoor Unit)
Remote Control Switch Cable
Screw
Printed Circuit Board
Terminal Board (TB2)
Earth Screw
Terminal Board (TB1)
Printed Circuit Board
Power Source Wiring
Transmission Wiring
(between Indoor Unit and Indoor Unit)
Cord Clamp
Transmission Wiring
(Outdoor Unit to Indoor Unit
and Indoor Unit to Indoor Unit)
Operation Wiring
In case of group control
operation by using a Remote
Control Switch
Remote Control Switch Cable
Power source Wiring
Operating Wiring
Remote Control Switch Cable
Hole for Wiring Connection Ø 32.5
(for Spare)
(Knock-Out Hole)
Hole for Wiring Connection 30x39
(for Cable)
Power Source
(TB2)
CN27
CN28
240V
220V