7-2. Recommended Wire Length and Diameter
Regulations on wiring diameter differ from locality to locality. For field wiring requirements, please refer to your local electrical codes. Carefully observe these regulations when carrying out the installation.
Table 2 lists recommended wire lengths and diameters for power supply systems.
NOTE
Refer to the wiring system diagram (Fig. 6) for the meaning of (A), (B) and (C) in Table 2.
Refer to your local codes or in the absence of local codes see the National Electric Code: ANSI/NFPA70.
Table 2
AWG | (A)+(B) | (A) Power Supply Wiring Length (ft.) | (C) Control | Fuse or Circuit | |
| (B) Power Line Length (ft.) | Line Length (ft.) | |||
Model |
| (#14) | (#12) | (#14) | Breaker Capacity |
|
| ||||
C1872, C2472, CL1872, CL2472 | 131 (Max.) | 230 (Max.) | 65 (Max.) | 20A | |
WARNING
#...AWG (American Wire Gauge)
WIRING SYSTEM DIAGRAM
Be sure to comply with local codes on running the wire from the indoor unit to the outdoor unit (size of wire and wiring method, etc.).
Each wire must be firmly connected.
No wire should be allowed to touch refrigerant tubing, the compressor, or any moving part.
WARNING
To avoid the risk of electrical shock, each air conditioner unit must be grounded.
For the installation of a grounding device, please observe local electrical codes.
Grounding is necessary, especially for units using inverter circuits, in order to release charged electricity and electrical noise caused by high tension. Otherwise, electrical shock may occur. 
Place a dedicated ground more than 7' (2 m) away from other grounds and do not have it shared with other electric appliances.
INDOOR | Disconnect | OUTDOOR | |
UNIT | UNIT | ||
switch | |||
Terminal | Field supply | Terminal | |
| (B) |
| |
1 | 230 / 208V | 1 | |
| |||
2 | 230 / 208V | 2 | |
| |||
3 | 230 / 208V | 3 | |
| |||
| (C) | 4 | |
|
| ||
| Grounding line | 5 | |
| (B) | 6 |
Fig. 6
(A) | Power supply | Single phase 230 / 208V 60HZ |
|
|
L1
L2
Grounding line
CAUTION
Be sure to connect the power supply line to the outdoor unit as shown in the wiring diagram. The indoor unit draws its power from the outdoor unit.
Do not run wiring for antenna, signal, or power lines of television, radio, stereo, telephone, security system, or intercom any closer than 3' 4" (1 m) from the power cable and wires between the indoor and outdoor units. Electrical noise may affect the operation.
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