Wiring Method; Unit Wiring; Power Supply Cable - Fujitsu AIRSTAGE ARXA24GALH Manuel D'installation

6.2. Wiring method

EXAMPLE
Outdoor unit or RB unit *1
Transmission
Indoor unit
Remote
Transmission
control
Power supply *2
*3
Breaker
Power supply Remote controller
(Master)
*1: When connecting to the Heat Recovery System, refer to the installation manual of
the RB unit.
*2: Earth (Ground) the remote controller if it has a earth (ground) cable.
*3: When connecting the 2-wire type remote controller, Y3 is not used.
(Crossover wiring of power supply)
Indoor unit
Power supply
Pull box
Breaker
Power supply
* Earth (Ground) the remote controller if it has an earth (ground) wire.
Connect the earth (ground) wire of the remote controller to the earth (ground) terminal of
transmission.

6.3. Unit wiring

Before attaching the cable to terminal block.

6.3.1. Power supply cable

Adjust the length of power supply cable to avoid excessive tension with referring fi gure
below.
25 mm
Earth (Ground)
cable
30 mm
A. For solid core wiring
(1) To connect the electrical terminal, follow the below diagram and connect after
looping it around the end of the cable.
(2) Use the specifi ed cables, connect them securely, and fasten them so that there is no
stress placed on the terminals.
(3) Use an appropriate screwdriver to tighten the terminal screws.
Do not use a screwdriver that is too small, otherwise, the screw heads may be
damaged and prevent the screws from being properly tightened.
(4) Do not tighten the terminal screws too much, otherwise, the screws may break.
(5) See the table for the terminal screw tightening torques.
(6) Please do not fi x 2 power supply cables with 1 screw.
Strip 25 mm
Screw with
special washer
Cable
Cable end (Loop)
Terminal block
En-9
9373385141-01_IM.indb Sec1:9 9373385141-01_IM.indb Sec1:9
Indoor unit Indoor unit
*2
*2
*3
Breaker Breaker
Remote controller Remote controller
(Slave)
Indoor unit Indoor unit
Power supply Power supply
Pull box
Loop
Screw with
special washer
Cable end (Loop)
Cable
When using solid core cables, do not use the ring terminal. If you use the solid core
cables with the ring terminal, the ring terminal's pressure bonding may malfunction and
cause the cables to abnormally heat up.
B. For strand wiring
(1) Use ring terminals with insulating sleeves as shown in the fi gure below 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 specifi ed 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.
*3
Do not use a screwdriver 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 for the terminal screw tightening torques.
(7) Please do not fi x 2 power supply cables with 1 screw.
Strip 10 mm
Screw with
special washer
Cable
Ring terminal
Use ring terminals and tighten the terminal screws to the specifi ed torques, otherwise,
abnormal overheating may be produced and possibly cause heavy damage inside the
unit.
M4 screw
(Power supply /L, N, GND)
6.3.2. Transmission and Remote controller cable
Transmission cable
Shielded cable (no fi lm)
Remote controller cable
For 3-wire type
25 mm
• Connect remote controller and transmission cables as shown in Fig. A.
Fig. A
GOOD
Tighten the terminal screws to the specifi ed torques, otherwise, abnormal overheating
may be produced and possibly cause heavy damage inside the unit.
WARNING
Ring terminal
Sleeve
Screw with
special washer
Ring terminal
Terminal block
Cable
WARNING
Tightening torque
1.2 to 1.8 N·m
(12 to 18 kgf·cm)
25 mm
35 mm
For 2-wire type
25 mm
PROHIBITED
Different diameter Connect to 1 side
WARNING
7/12/2012 11:16:12 AM 7/12/2012 11:16:12 AM