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11
English
8-3 SPECIFICATION FOR FIELD SUPPLY FUSES
AND WIRING
Model
Power supply wiring
Remote controller wiring
Transmission wiring
Fuse
Size Wire Size
FCQ18TAVJU
15A
Wiring size
and length
must
comply
with local
codes.
2-conductor,
stranded
non-shielded
copper cable
PVC/vinyl
jacket
(NOTE)
AWG18-16
(0.75-
1.25 mm
2
)
FCQ24TAVJU
FCQ30TAVJU
FCQ36TAVJU
FCQ42TAVJU
FCQ48TAVJU
Allowable lengths of transmission wiring and remote controller
wiring are as follows.
(1) Outdoor unit – Indoor unit
.................... Max. 3280 ft (1,000 m)
(2)
Indoor unit – Remote controller .............. Max. 1640 ft (500 m)
NOTE
• Vinyl cord with sheath or cable (Insulated thickness :
1/16 in. (1 mm) or more)
8-4 WIRING CONNECTION METHOD
CAUTION FOR WIRING
• The indoor units in the same system can be connected to
the power supply from one branch switch. How ever, selec-
tion of branch switch, branch over current circuit breaker
and wiring size must be according to applicable legislation.
• For connection to the terminal block, use a ring type crimp
style terminals with insulation sleeve or insulate the wirings
properly.
Insulation sleeve
Ring type crimp
style terminals
Wiring
• If the above is not available, make sure to fulll the following
requirements.
Connection of 2
wirings of same
size must be
carried out on
both sides.
Connection of
wirings of
different sizes is
prohibited.
Connection of 2
wirings on one
side is
prohibited.
(Abnormal heating may occur if the wirings are not tight-
ened securely.)
• Use the required wirings, connect them securely and x
these wirings 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 shown below for tightening torque of
terminals.
Tightening torque
[lbf·ft. (N·m)]
Terminal block for remote controller
and transmission wirings
0.65 ± 0.06
(0.88 ± 0.08)
Terminal for power supply
0.96 ± 0.07
(1.3 ± 0.1)
Ground terminal
• Do not carry out soldering nish when stranded wirings
are used.
WARNING
• When wiring, form the wirings orderly so that the control
box cover can be securely fastened. If the control box cover
is not in place, the wirings may oat up or be sandwiched by
the box and the lid and cause electric shocks or a re.
<Powersupplywiring·groundwiring·remotecontroller
wiring·transmissionwiringconnectingmethod>
• 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 penetrating hole (low volt-
age). After connecting the remote controller wir ing to [P
¹
·
P
²
] and the transmission wiring to [F
¹
· F
²
] 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 penetrating hole to pre-
vent water from entering the indoor unit. (RefertoFig.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.
01_EN_3P161684-9U.indd 11 8/8/2018 15:26:56
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