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 F2
F1 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
