Daikin VRV III Manual page 451

Installation
Refer to the table below for the tightening torque of the terminal screws.
3. Do not connect wires of different gauge to the same ground terminal. Looseness in the connection may
deteriorate protection.
4. Outside of the unit, keep transmission wire and remote controller wire at least 50 mm away from power supply
wire and ground wire. The unit may malfunction if subjected to electrical noise (external static).
5. For remote controller wiring, refer to the "INSTALLATION MANUAL OF REMOTE CONTROLLER" attached to the
remote controller.
6. Never connect power supply wire to the transmission terminal block (X2M). A mistake of the sort could damage
the entire system.
7. Use only specified wire and tightly connect wires to terminals. Be careful wires do not place external stress on
terminals. Keep wiring in neat order and so as not to obstruct other equipment such as the electric parts box lid.
Make sure the lid closes tight. Incomplete connections could result in overheating, and in worse case, electric
shock or fire.
WIRING EXAMPLE
Fit the power supply wiring of each unit with a switch and fuse as shown in the drawing.
COMPLETE SYSTEM EXAMPLE (3 SYSTEMS)
1. When using 1 remote controller for 1 indoor unit.
(Normal operation)
Power supply
220-240V
Outdoor unit
50Hz
Control box
IN/D OUT/D
F F F F
1 2 1 2
L N
L N P P F F T
1 2 1 2
Unit A
P P
1 2
[ PRECAUTIONS ]
1. A single switch can be used to supply power to units on the same system. However, branch switches and branch
circuit breakers must be selected carefully.
446
Terminal
Transmission terminal block (X2M)
Power supply terminal block (X1M)
Ground terminal
Power supply
Outdoor unit
Main
switch
Indoor unit
Remote controller
Power supply
Power supply Power supply
220-240V
220-240V 220-240V
50Hz 50Hz
50Hz
L N L N L N
T L N P P F F T T L N P P F F T T L N
1 2 1 2 1 2 1 2 1 2 1 2 1 2
Unit B Unit C
P P P P
1 2 1 2
Most
downstream
unit
Fig. 19
Size Tightening torque
M3.5 0.79 – 0.97 N·m
M4 1.18 – 1.44 N·m
M5 3.02 – 4.08 N·m
Power supply wire
Transmission wire
Switch
Fuse
Fig. 18
2. For group control or control by 2 remote
controllers
Power supply
220-240V
Outdoor unit
Control box
50Hz
IN/D OUT/D
F 1 F 2 F 1 F 2
L N
Unit A
L N P P F F T T
1 2 1 2 1 2
P P F F T T
1 2 1 2 1 2
P P
1 2
P P
1 2
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ED34-862
Note: It is not necessary to designate
indoor unit address when using
group control.
The address is automatically set
when power is activated.
Unit B Unit C
L N P P F F T T L N P P F F T T L N P P F
1 2 1 2 1 2 1 2 1 2 1 2 1 2
Control by 2
Fig. 20 remote controllers
FXMQ-MF
Most
downstream
unit
F T T
1 2 1 2
P P P P
1 2 1 2