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5. ELECTRICAL WIRING
5-1. General Precautions on Wiring
(1) Before wiring, confirm the rated voltage of the unit as
shown on its nameplate, then carry out the wiring closely
following the wiring diagram.
(2) Provide a power outlet to be used exclusively for each unit
and a circuit breaker for overcurrent protection should be
provided in the exclusive line.
(3) To prevent possible hazards from insulation failure, the unit
must be grounded.
(4) Each wiring connection must be done in accordance with
the wiring system diagram. Wrong wiring may cause the
unit to misoperate or become damaged.
(5) Do not allow wiring to touch the refrigerant tubing,
compressor, or any moving parts of the fan.
(6) Unauthorized changes in the internal wiring can be very
dangerous. The manufacturer will accept no responsibility
for any damage or misoperation that occurs as a result of
such unauthorized changes.
(7) Regulations on wire diameters differ from locality to
locality. For field wiring rules, please refer to your LOCAL
ELECTRICAL CODES before beginning.
You must ensure that installation complies with all relevant
rules and regulations.
(8) To prevent malfunction of the air conditioner caused by
electrical noise, care must be taken when wiring as follows:
● The remote control wiring and the inter-unit control wiring
should be wired apart from the inter-unit power wiring.
● Use shielded wires for inter-unit control wiring between units
and ground the shield on both sides.
(9) If the power supply cord of this appliance is damaged,
it must be replaced by a repair shop designated by the
manufacturer, because special-purpose tools are required.
5-2. Recommended Wire Length and Wire Diameter
for Power Supply System
Outdoor unit (3-phase)
(A) Power supply
Wire size
OU-PSINV-70TH
14 mm
OU-PSINV-90TH
14 mm
Indoor unit
(B) Power supply
Type
HW
4WK, C, D
Big_PAC_eng.indb 33
Big_PAC_eng.indb 33
Time delay
fuse or circuit
Max. length
capacity
2
116 m
15 A
2
96 m
20 A
Time delay fuse or
2
circuit capacity
2.5 mm
Max. 150 m
10 A
Max. 130 m
10 A
Control wiring
(C) Inter-unit
(between outdoor
(D) Remote control
and indoor units)
control wiring
2
0.75 mm
(AWG #18)
0.75 mm
Use shielded
Use shielded wiring
1
wiring*
Max. 1,000 m
Max. 500 m*
N OT E
*1
With ring-type wire terminal.
*2
When (D) and (E) are used together with maximum length of
500 m for group control, and if the remote controller for the
group control is wireless, the maximum length will be 400 m.
33
(E) Control wiring
wiring
for group control
2
2
(AWG #18)
0.75 mm
(AWG #18)
Use shielded wiring
2
Max. 200 m (Total)
2009/08/26 16:33:16
2009/08/26 16:33:16
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