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Disconnect
switch
Field supply
1
2
3
1
2
3
4
5
6
Grounding line
230 / 208V
230 / 208V
230 / 208V
INDOOR
UNIT
OUTDOOR
UNIT
Grounding
line
L1
L2
Power supply
Single phase 230 / 208V 60HZ
Terminal Terminal
(A)
(B)
(C)
(B)
(A) Power Supply Wiring Length (ft.)
(B) Power Line Length (ft.)
(C) Control
Line Length (ft.)
(A)+(B)
WARNING
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.
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.
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.
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.
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.
Table 2
AWG
Fuse or Circuit
Breaker Capacity
20A
(#14)
131 (Max.)
(#12)
230 (Max.)
(#14)
65 (Max.)
#...AWG (American Wire Gauge)
C1872, C2472, CL1872, CL2472
Model
Fig. 6
CAUTION
WARNING
NOTE
WIRING SYSTEM DIAGRAM
39