CAUTION
•
Use 2-core transmission wiring.
Using the same wire with 3 or more cores to connect 2 or more indoor units may cause them to stop
with an error.
•
When shielded wire is used, be sure to ground one side of the shielded wire.
The total wiring length is 4,920 ft. (1,500m) when shielded wire is used.
•
Be sure to use ring type crimp style terminals with insulation sleeves to
connect wires to the power supply terminal block. (
Refer to Fig . 6 .
)
•
Do not use with the power supply terminal block and ground terminal
connected to wiring for another circuit.
•
Do not use pre-solder stranded wire.
• Connect wires securely so that the terminals will not be subjected to external force.
•
Use an appropriately sized screwdriver to tighten the terminal screws.
Use of a screwdriver that is too small could damage the screw head and prevent proper tightening.
•
Overtightening the terminal screws could damage the screw.
Refer to the table for the terminal screw tightening torque.
Terminal screw size
Tightening torque
M3.5
(Transmission wire terminal block)
0.65 ± 0.05 ft·lbf
(0.88 ± 0.08 N·m)
M4
(Power supply terminal block)
0.97 ± 0.09 ft·lbf
(1.31 ± 0.13 N·m)
M4
(Ground terminal)
1.25 ± 0.12 ft·lbf
(1.69 ± 0.17 N·m)
•
Never connect power supply wiring to the transmission wiring terminal block.
Doing so may damage the entire system.
• A daisy chain configuration is required for transmission wiring. Transmission wiring cannot be branched
again after the initial branch.
(
Refer to Fig . 7 .
)
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
Branch after initial branch
Branch
Fig . 7
Ring type crimp
style terminal
Electric wire
Insulation
sleeve
Fig . 6
20
English
01_EN_3P579732-1B.indb 20
7/29/2020 1:03:40 PM