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• Do not turn on the power supply (branch switch, branch
overcurrent circuit breaker) until all the works are finished.
• Make sure to ground the air conditioner.
Grounding resistance should be according to applicable
legislation.
• Do not connect the ground wiring to gas or water piping,
lightning conductor or telephone ground wiring.
• Gas piping ...
Ignition or explosion may occur if gas leaks.
• Water piping... Hard vinyl tubes are not effective ground.
• Lightning conductor or telephone ground wiring ... Elec-
tric potential may rise abnormally if struck by a lightning
bolt.
• For electric wiring work, refer to also the WIRING DIAGRAM
attached to the control box cover.
• Carry out installation and wiring of the remote controller accord-
ing to the installation manual attached to the remote controller.
• Do not touch the Printed Circuit Board assembly. It may
cause malfunction.
7-2 ELECTRIC CHARACTERISTICS
Units
Power
supply
Fan motor
Model
Hz Volts Voltage
range
MCA MOP
HP
FLA
FCQ18AAVJU
60 208/
230
Max. 253
Min. 187
0.5
15
0.07 (53) 0.4
FCQ24AAVJU
0.5
15
0.07 (53) 0.4
FCQ30AAVJU
1.0
15 0.14 (106) 0.8
FCQ36AAVJU
1.6
15 0.14 (106) 1.3
FCQ42AAVJU
1.6
15 0.14 (106) 1.3
FCQ48AAVJU
1.6
15 0.14 (106) 1.3
MCA: Minimum Circuit Ampacity (A)
MOP: Maximum Overcurrent Protective Device (A)
HP: Fan Motor Rated Output (HP (W)) FLA: Full Load Ampere (A)
7-3 SPECIFICATION FOR FIELD SUPPLY FUSES
AND WIRING
Model
Power supply wiring
Remote controller wiring
Transmission wiring
MOP
Size
Wiring
Size
FCQ18AAVJU
15A
Wiring size
and length
must
comply
with local
codes.
2-conductor,
stranded
nonshielded
copper cable
PVC/vinyl
jacket
(NOTE 1)
AWG
18-16
(0.75-
1.25 mm
2
)
FCQ24AAVJU
FCQ30AAVJU
FCQ36AAVJU
FCQ42AAVJU
FCQ48AAVJU
Allowable lengths of remote controller wiring and transmission
wiring are as follows:
(1) Remote controller wiring (indoor unit - remote controller)
..................................................................
Max. 1,640 ft. (500 m)
(2) Transmission wiring Outdoor unit - Indoor unit
.....................................................
Max. 3,280 ft. (1,000 m)
NOTE
1. Vinyl cord with sheath or cable (Insulated thickness :
1/16 in. (1 mm) or more)
7-4 WIRING CONNECTION METHOD
CAUTION FOR WIRING
• For connection to the terminal block, use ring type crimp
style terminals with insulation sleeve or insulate the wirings
properly.
Insulation sleeve
Ring type crimp
style terminal
Wiring
•
Use the required wires, connect and fix securely so that
external force may not apply to the terminals.
• Use a proper screw driver for tightening the terminal
screws.
If an improper screw driver is used, it may damage the
screw head and a proper tightening cannot be car ried out.
• If a terminal is over tightened, it may be damaged.
Refer to the table below for tightening torque of terminals.
Tightening torque
[lbf·ft. (N·m)]
Terminal block for remote controller
and transmission wiring
0.65 ± 0.06
(0.88 ± 0.08)
Terminal for power supply wiring
1.08 ± 0.10
(1.47 ± 0.14)
Ground terminal
•
Do not carry out soldering finish when stranded wirings
are used.
WARNING
• When wiring, form the wiring orderly to prevent it from being
sandwiched by the control box cover and fasten the cover
securely. Improper position of the control box cover may
result in electric shock or fire.
< Power supply wiring · ground wiring · remote controller
wiring · transmission wiring connecting method >
• Power supply wiring, ground wiring
Pass the power supply wire through the attached insula-
tion tube (16) between the outlet of conduit and the power
supply terminal, and bind them together with the attached
clamp (4).
(Refer to Fig. 23-2)
Use a pair of conduit mounting plates (17) to connect a
conduit to the unit as shown
Fig. 23-1. After connecting the
power supply wiring to [L
1
· L
2
] on the power supply terminal
block (X2M) and the ground wiring to the ground terminal,
clamp them near the terminal block using the attached
clamp (4).
(Refer to Fig. 23-2)
• Remote controller wiring, transmission wiring
Pull the wiring through the wiring through hole (low volt-
age). After connecting the remote controller wir ing to [P1 ·
P2] and the transmission wiring to [F1 · F2] on the terminal
block (X1M), clamp them near the terminal block using the
attached clamp (4).
(Refer to Fig. 23-2)
• After connecting the wiring, make sure to stick the sealing
material (Small) (13) to the wiring through hole to prevent
water from entering the indoor unit.
(Refer to Fig. 24)
CAUTION
• Never connect the power supply wiring to the terminal
block for remote controller/transmission wiring (X1M).
If may damage the total system.
• Do not connect the remote controller/transmission wir-
ing to the wrong terminal block.
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