AirStage ASUA9TLAV Manuale di installazione - Pagina 8
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5.2. Wiring method
(EXAMPLE)
Outdoor unit or RB unit *1
Transmission
Indoor unit
Remote
Transmission
control
Power supply
*2
Breaker2
Breaker1
Remote controller
(Master)
Power supply
Breaker shall be located in sight from and readily accessible from all indoor units.
*1: When connecting to the Heat Recovery System, refer to the installation manual of the RB unit.
*2: When connecting the 2-wire type remote controller, Y3 is not used.
(Crossover wiring of power supply)
Indoor unit
Power supply
Pull box
Breaker2
Breaker1
Power supply
Disconnect switch shall be installed between indoor unit and pull box.
5.3. Unit wiring
• Before attaching the cable to terminal block.
5.3.1. Power supply cable
Earth (ground)
wire
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 wires, 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.
En-7
Breaker 1: Ground Fault Equipment
Breaker (GFEB)
Breaker 2: Maximum Circuit Breaker
(MAX. CKT. BKR)
Indoor unit
*2
Breaker2
Breaker2
Breaker1
Breaker1
Remote controller
Remote controller
(Slave)
Indoor unit
Power supply
Power supply
Pull box
: Disconnect switch
Conduit connector
5-7/8 in. (150 mm)
7-1/2 in. (190 mm)
Conduit holder
Strip 1 in.
(25 mm)
Cable
Indoor unit
*2
When using solid core cables, do not use the attached 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.
Do not use a screwdriver that is too small, otherwise, the screw heads may be
Indoor unit
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 3/8 in.
(10 mm)
Cable
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.
(Power supply / L1, L2 (N), GND)
5.3.2. Transmission cable
Shielded wire
(no fi lm)
• When the 2 cables are attached:
GOOD
Tighten the terminal screws to the specifi ed torques, otherwise, abnormal overheating
may be produced and possibly cause heavy damage inside the unit.
(Transmission /X1, X2)
Screw with
special washer
Cable end (Loop)
Terminal block
WARNING
Ring terminal
Screw with
special washer
Ring terminal
Terminal block
WARNING
Tightening torque
M4 screw
PROHIBITED
Different diameter
WARNING
Tightening torque
M4 screw
Loop
Screw with
special washer
Cable end (Loop)
Cable
Sleeve
Screw with
special washer
Ring terminal
Cable
11 to 16 lbf·in
(1.2 to 1.8 N·m)
1-9/16 in. (40 mm)
2-15/16 in (75 mm)
Connect to 1 side
7.1 to 11 lbf·in
(0.8 to 1.2 N·m)