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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 power supply disconnect and
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 accor-
dance 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 begin-
ning.
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 dam-
aged, it must be replaced by a repair shop
appointed by the manufacturer, because special
purpose tools are required.
5-2. Recommended Wire Length and Wire Diameter for Power Supply System
Outdoor unit
CHX03652
For field wiring rules, please refer
to your LOCAL ELECTRICAL CODES
30 A
CHX06052 50 A
Time delay fuse or
circuit capacity
(A) Power supply wiring
For field wiring rules, please refer
to your LOCAL ELECTRICAL CODES
(B) Power supply wiring
Indoor unit
Time delay fuse or
circuit capacity
K
A, X, T, U
Type
Type
15 A
15 A
15 A
D
Control wiring
(C) Inter-unit (between outdoor and
indoor units) control wiring
(D) Remote control wiring (E) Control wiring for group control
AWG #18 (0.75 mm
2
) AWG #18 (0.75 mm
2
) AWG #18 (0.75 mm
2
)
Use shielded wiring*Use shielded wiring Use shielded wiring
Max. 3,280 ft.
Max. 1,640 ft.
Max. 1,640 ft. (Total)
NOTE
* With ring-type wire terminal.
07-056 Mini_ECOi_II_NA 3/19/07 2:41 PM Page 57