English 17
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 the shield wire is used, be sure to ground the one side of the shield wire.
The total wiring length is 1500m 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. 11.)
• Do not use with the power supply terminal block and earth terminal
connected to wiring for another circuit.
• Do not 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 (N·m)
M3.5
(transmission wire terminal block)
0.88 ± 0.08
M4
(power supply terminal block)
1.31 ± 0.13
M4
(earth terminal)
1.69 ± 0.17
• Never connect power supply wiring to the transmission wiring terminal block.
Doing so may damage the entire system.
• Transmission wiring cannot be branched again after the initial branch.
(Refer to Fig. 12.)
F1 F2 F1 F2 F1 F2
F1 F2F1 F2
Branch after initial branch
Branch
Fig. 12
Ring type crimp
style terminal
Electric wire
Insulation
sleeve
Fig. 11
01_EN_3P194121-8U.indd 17 2/21/2014 3:31:12 PM
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