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4. ELECTRICAL WIRING
4-1. 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 provid-
ed 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.
4-2. Recommended Wire Length and Wire Diameter for Power Supply System
Outdoor unit
CHDZ07263
CHDZR07263
CHDZ09663
CHDZR09663
Indoor unit
Type
K
A, X, XM, U, UM, T, F, FM
D (364, 484)
Control wiring
(A) Inter-unit (between outdoor and
indoor units) control wiring*
AWG #18 (0.75 mm
Max. 3,280 ft.
NOTE
* With ring-type wire terminal.
Time delay fuse or
circuit capacity
40 A
45 A
Time delay fuse or
circuit capacity
10 – 16A
10 – 16A
10 – 16A
(B) Remote control wiring
2
)
AWG #18 (0.75 mm
Max. 1,640 ft.
(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 dam-
aged, it must be replaced by a repair shop appoint-
ed by the manufacture, because special purpose
tools are required.
(C) Control wiring for group control
2
)
(D) Inter-outdoor unit control wiring
28
2
AWG #18 (0.75 mm
)
Max. 650 ft. (Total)
2
AWG #18 (0.75 mm
)
Max. 980 ft.
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