Wiring Method - Fujitsu Airstage AOU72RLAVL Installation Manual

Example: Disable Automatic Address setting
Refrigerant
system 1
Refrigerant
system 2
Refrigerant
system 3
Example: Enable Automatic Address setting
Refrigerant
system 1
Refrigerant
system 2
Refrigerant
system 3

6.5. Wiring method

6.5.1 Connection diagrams
Power supply
208/230V 3~ 60Hz
L1 L2 L3
Breaker 1
Breaker 2
Outdoor unit
L1 L2 L3
Power supply
Transmission
Indoor unit
Transmission Transmission
Power supply Remote control Power supply
*1 *1
Breaker 2 Breaker 2
Breaker 1 Breaker 1
Remote
controller
Power supply Power supply
208/230V ~ 60Hz 208/230V ~ 60Hz
*1: The number of power supply terminals is different depending on the indoor unit
model. For the wiring, refer to the indoor unit installation manual.
• There are two types of remote controller: the 2-wire type and the 3-wire type. For details,
see the relevant remote controller installation manual. (When connecting the 2-wire type
remote controller, Y3 is not used.)
The wiring example for outdoor and indoor units is shown in figure.
6.5.2 Wiring procedure
• Remove the service panel. And connect the cable to the terminal in accordance with the
terminal name plate.
• Use a ring terminal to connect the electric cables to the power supply terminal board.
• Keep the earth cable longer than the other cables.
• After connecting the electric cable, secure them with a cable clamp.
• Connect the cable without applying excessive tension.
• Use the specified cable type and connect the cable securely.
Secure with a cable
Tightening torque
clamp as shown in the
[lbf·ft (N·m)]
figure below.
Transmission line
Transmission line
Transmission line
Transmission line
Transmission line
Transmission line
Breaker 1: Ground Fault Equipment
Breaker (GFEB)
Breaker 2: Maximum Circuit Breaker
(MAX. CKT. BKR)
To other refrigerant circuit
outdoor unit
Transmission
Indoor unit Indoor unit
Transmission
Remote control Power supply Remote control
*1
Breaker 2
Breaker 1
Remote Remote
controller controller
Power supply
208/230V ~ 60Hz
M3 screw 4.4 to 5.3 (0.5 to 0.6)
M5 screw 17.7 to 26.5 (2.0 to 3.0)
Push mount
Power supply cable tie
Power supply cable
cable (accessories)
Transmission cable
How to connect wiring to the terminal
Caution when wiring cable
(1) Use ring terminals with insulating sleeves as shown in the figure to connect to the
terminal block.
(2) Securely clamp the ring terminals to the cables using an appropriate tool so that
the cables do not come loose.
(3) Use the specified cables, connect them securely, and fasten them so that there is
no stress placed on the terminals.
(4) Use an appropriate screwdriver to tighten the terminal screws. Do not use a screw-
driver that is too small, otherwise, the screw heads may be damaged and prevent
the screws from being properly tightened.
(5) Do not tighten the terminal screws too much, otherwise, the screws may break.
(6) See the table below for the terminal screw tightening torques.
Strip 3/8 in
(10 mm)
Screw with
special washer
Cable
Ring terminal
Terminal block
Shielding the transmission cable
Connect both ends of the shielded
wire of the transmission cable to
the earth (ground) terminal of the
equipment or to the earth (ground)
screw near the terminal.
Be sure to use one side of a twisted
pair cable when using transmission
Use one side
cable with 2 sets of twisted pair
of the twisted
cables.
pair cable
Attaching the conduit
Front connection
Cable (with
conduit)
• Fix the conduit with the supporters as shown below.
Conduit (Power supply cable)
Outdoor unit
30 in
(756 mm) (1,361 mm)
or less or less
Transmission terminal (M3)
Power supply terminal
Push mount cable tie
(accessories)
Ring
terminal
(M5)
Earth
(ground)
cable
Conduit
Transmission
cable
Ring terminal
Sleeve
Screw with
special washer
Ring terminal
Cable
Wind with insulation tape to prevent short circuit
Connect both ends of shielded
wire to earth (Ground).
Lateral connection
lock nut
Supporter
54 in 54 in 54 in
(1,361 mm) (1,361 mm)
or less or less
En-10