Electrical Wiring - Hitachi RCI-2.5-FSN3Ei Installation And Operation Manual

ELECTRICAL WIRING

6 ELECTRICAL WIRING
6.1 GENERAL
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D A N G E R
• Turn off the main power switch to the indoor unit and the out-
door 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 unpro-
tected parts and at the worst, a fire will occur.
!
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, 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 wir-
ing connection hole with the seal material to protect the product from
any condensate water or insects.
6.2 ELECTRICAL WIRING CONNECTION FOR INDOOR UNIT
1 The electrical wiring connection for the indoor unit is shown
below.
Hole for wiring
Hole for wiring connection Ø 32.5 (for spare)
connection 30x39
(for cable)
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
Electrical
Box
Stopper
(Metal)
Power source wiring
Transmission wiring
Remote control switch
cable
7 PMML0253A rev.5 - 08/2016
Power source wiring
operating wiring
remote control switch
cable
(Knock-out hole)
Screw
• Tightly secure the wires with the cord clamp inside the indoor unit.
• Lead the wires through the knockout hole in the side cover when us-
ing 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.
unit to the terminals in the electrical box.
Earth screw
Power source wiring
(between indoor unit
and indoor unit)
Transmission wiring
(between indoor unit and outdoor unit)
(between indoor unit and indoor unit)
Printed circuit board (PCB1)
Terminal board (TB)
Earth
screw
Remote control switch cable
(operation wiring in case of group
control operation by using a
remote control switch)
Printed circuit
board (PCB2)