Wiring Method; Connection Diagrams; Wiring Procedure - Fujitsu AJYA36LALH Installation Manual

6. 5.

Wiring method

6. 5. 1.

Connection diagrams

Outdoor unit
Transmission
Power supply
Indoor unit
Transmission
Power supply Remote control
*1
Breaker
Remote
Power supply
controller
The wiring example for outdoor and indoor units is shown in fi gure.
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 specifi ed cable type and connect the cable securely.
Secure with a cable clamp as shown in the fi gure below.
Transmission cable
Power supply cable
Sealing transmission cable
Connect both ends of the sealed wires of the transmission cable to the earth terminal of
the equipment or to the earth screw near the terminal.
Be very careful that the screws are not overly tightened as the cables may snap and the
terminal may be damaged.
En-11
Breaker
To other refrigerant circuit Outdoor unit
Indoor unit
Transmission
Power supply Remote control
*1
*2
Breaker
Power supply
Transmission terminal (M3)
Cable clamp
Cable tie
Cable tie
(accessory)
M3 screw
M5 screw
Breaker : (1) Earth leakage circuit breaker
(2) Current breaker (over current)
Indoor unit
Transmission
Power supply Remote control
*1
*2
Breaker
Remote
Power supply
controller
Power supply terminal
Ring terminal (M5)
earth cable
Tightening torque
0.5 to 0.6 N·m
(5 to 6 kgf·cm)
2.0 to 3.0 N·m
(20 to 30 kgf·cm)
Wind with insulation tape to prevent short circuit
Use one side of the
twisted-pair cable
Be sure to use one side of a twisted-pair cable when using transmission cable with 2 sets
of twisted-pair cables.
*1: The number of power supply terminals is
different depending on the indoor unit model.
For the wiring, refer to the indoor unit installa-
tion manual.
*2: Ground the remote controller if it has a ground
*2
cable.
Remote
controller
How to connect wiring to the terminal
Caution when wiring cable
(1) Use crimp-type terminals with insulating sleeves as shown in
the fi gure to connect to the terminal block.
(2) Securely clamp the crimp-type 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 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 : 10mm
Screw with special washer
Crimp-type terminal
Cable
Terminal blocks
Connect both ends of sealed cable to earth.
Crimp-type
terminal
Sleeve
Screw with
special washer
Crimp-type
terminal
Cable