Service Manual

50
Indoor power source and communication wiring
Item
Indoor
total
current (A)
Power cable
section
Wire length
ft.(m)
Rated current of
overcurrent breaker
(A)
Communication wire section
Outdoor/indoor Indoor/indoor
<10 14AWG 75.5(23) 20
2-core × (18-14AWG)
shielded wire
• Power cable and communication wire must be rmly connected.
• Each indoor unit must be properly grounded.
• When power cable exceeds the range, use a larger gauge as required.
• The Shielded layer of the communication wires must be connected together and be grounded at at each point.
• Communication wire total length cannot exceed 1000m.
WARNING
• Power lines must be copper wire.
• All indoor and outdoor units must be grounded properly. The ground wire must not be grounded using a gas
pipe, water pipe, lightning rod or telephone wire. If the grounding is correct it may cause electric shock or re.
• Power supply must be installed with an earth leakage circuit breaker, otherwise it may cause electrical shock or
re.
• The operation and maintenance of the electrical equipment shall be carried out with the power supply off.
• The indoor and outdoor units each get their own independent power supply.
• The communication line and the power line must be separate.
Communication wire for wired controller
Wire length (ft.(m)) Wire spec Wire length(m) Wire spec
<328(100) 22AWG ×(3-core) shielded wire ≥984(300)and <1312(400) 16AWG ×(3-core) shielded wire
≥328(100) and
<656(200)
20AWG×(3-core) shielded wire ≥1312(400) and <1968(600) 14AWG ×(3-core) shielded wire
≥656(200) and
<984(300)
18AWG ×(3-core) shielded wire
• Shielded layer of communication wire must be grounded at one end.
• The total length cannot exceed 600m.