Wiring Procedure - Fujitsu Airstage AJYA72LALH Installation Manual

Fig. 1
Outdoor unit
B
A
Terminal
resistor
Indoor unit
When AB + BC + BD > 500 m :
Signal Amplifi er is required.
Fig. 2
Outdoor unit
Terminal resistor
M
N
G
Transmission line
H
K
Signal Amplifi er
Terminal resistor
NOTE)
Unit* means indoor unit, outdoor unit, Touch Panel Controller and System Controller,
Signal Amplifi er, single split adaptor, Network Convertor etc..
Do not use loop wiring. This may lead to parts damage and erroneous operation.
6. 5. 3. Enabling/Disabling automatic address setting
You can enable/disable automatic address setting for the indoor unit and the signal
amplifi er.
To enable automatic address setting for the indoor unit, connect the indoor unit to
outdoor units under the same refrigerant system.(Fig.4)
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
En-13
Transmission line
System
Controller
C
D
Touch
Panel
Controller
NS 1
Indoor unit
F
P
Touch
Panel
J
Controller
NS 2
System
L
Controller
Transmission line
Transmission line
Transmission line
Transmission line
Transmission line
Transmission line
6. 6.

Wiring procedure

• Remove the cover of the electrical compartment and follow the terminal plate to con-
nect the electric cables to the terminal.
• After connecting the cables, secure them with the cable ties.
• Connect the cables without applying excessive tension.
Cable routing
Secure with a binder as shown in the fi gure below.
Connecting the
power supply
cable
Cable tie
(Accessory)
Power supply
cable routing
* Tighten the cable tie fi rmly so that pulling force does not propagate to the terminal
connection even if force of 100N is applied to the cable.
Connecting cables to the terminals
Use ring terminals and tighten the terminal screws to the specifi ed torques, other-
wise, abnormal overheating may be produced and possibly cause heavy damage
inside the unit.
Be sure fi ll the holes of power supply cable and transmission cable with putty (fi eld
supply).
If small animals such as insects enter the electrical component box, a short circuit
may be caused.
Tightening torque
M3 screw 0.5 to 0.6 N·m (5 to 6 kgf·cm)
M8 screw 5.0 to 7.0 N·m (50 to 70 kgf·cm)
Connecting the
transmission
cable
Cable guide
Cable clip
Cable tie *
(Accessory)
Transmission cable routing
WARNING