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12
English
CAUTION
• When clamping wiring, use the included clamping material
to prevent outside pressure being exerted on the wiring con-
nections and clamp firmly. When doing the wiring, make
sure the wiring is neat and does not cause the control box
lid to stick up, then close the cover firmly.
• When attaching the control box lid, make sure you do not
pinch any wires.
• After all the wiring connections are done, fill in any gaps in
the through holes with putty or insulation (field supplied) to
prevent small animals and insects from entering the unit
from outside. (If any do get in, they could cause short cir-
cuits in the control box.)
• Outside the unit, separate the weak wiring (remote control-
ler wiring) and strong wiring (inter-unit wiring, ground wire,
and other power wiring) at least 50 mm so that they do not
pass through the same place together. Proximity may cause
electrical interference, malfunctions, and breakage.
[PRECAUTIONS]
1. Use round crimp-style terminals for connecting wiring to the
power supply terminal block.
If unavailable, observe the following points when wiring.
• Do not connect wiring of different gauge to the same
power supply terminal.
(Looseness in the connection may cause overheating.)
• Use the specified electric wiring. Connect the wiring
securely to the terminal. Lock the wiring down without
applying excessive force to the terminal. (Tightening
torque: 131N·cm ±10 %)
2. Tightening torque for the terminal screws.
• Use the correct screwdriver for tightening the terminal
screws. If the blade of screwdriver is too small, the head
of the screw might be damaged, and the screw will not be
properly tightened.
• If the terminal screws are tightened too hard, screws
might be damaged.
• Refer to the table below for the tightening torque of the
terminal screws.
3. Do not connect wiring of different gauge to the same ground-
ing terminal. Looseness in the connection may deteriorate
protection.
4. Outside of the unit, keep remote controller wiring at least
50 mm away from power supply wiring. The unit may mal-
function if subjected to electrical (external) noise.
5. For remote controller wiring, refer to the “INSTALLATION
MANUAL OF REMOTE CONTROLLER” attached to the
remote controller.
6. Never connect power supply wiring to the terminal block
for remote controller wiring. A mistake of the sort could
damage the entire system.
7. Use only specified wiring and tightly connect wiring to termi-
nals. Be careful wiring do not place external stress on termi-
nals. Keep wiring in neat order and so as not to obstruct other
unit such as popping open the control box lid. Make sure the
lid closes tight. Incomplete connections could result in over-
heating, and in worse case, electric shock or fire.
8-2
WIRING EXAMPLE
• Fit the power supply wiring of each unit with a switch and
fuse as shown in the drawing.
COMPLETE SYSTEM EXAMPLE (3 systems
)
1. When using 1 remote controller for 1 indoor unit. (Nor-
mal operation)
2. For group control or use with 2 remote controllers
Terminal
Size
Tightening torque
Terminal block for remote controller (2P)
M3.5
0.79 – 0.97N·m
Inter-unit wiring and ground wire
terminal block (4P)
M4
1.18 – 1.44N·m
Electric wiring
Round crimp-style terminal
Attach insulation sleeve
Power supply
wiring
Transmission
wiring
Switch
Fuse
Power supply
Main
switch
Remote controller
BEV unit
Indoor unit
BS unit
(Only for Heat
recovery
system)
L N
1 2
TO indoor
TO indoor
TO indoor
3 F
1
F
2
L N
1 2 3
P
1
P
2
P
1
P
2
L N
1 2 3 F
1
F
2
L N
P
1
P
2
P
1
P
2
L N
1 2 3 F
1
F
2
L N
P
1
P
2
P
1
P
2
L N
T
1
T
2
P
1
P
2
F
1
F
2
L N
P
1
P
2
IN/D OUT/D
F1 F2 F1 F2
1 2 3
1 2 3
Power supply
Power supply
Power supply
Power supply
Outdoor unit
BEV Unit A
BEV Unit B
BEV Unit C
Indoor Unit A
Indoor Unit B
Indoor Unit C
Normal VRV
Indoor Unit
Remote
controller
Remote
controller
Remote
controller
Remote
controller
Maximum one indoor unit
for each BEV unit.
When calculating the limit of
connected indoor units, count all
the lower BEV units as one unit.
If the remote controller does not have a
cooling/heating selection right, “operation
switch is being managed” will be displayed.
Control box
IN/D OUT/D
F
1
F
2
F
1
F
2
Control box
P
1
P
2
P
1
P
2
P
1
P
2
L N
1 2 3
F
1
F
2
1 2 3
F
1
F
2
1 2 3
F
1
F
2
1 2 3
P
1
P
2
P
1
P
2
P
1
P
2
L N
L N
L N
1 2 3
1 2 3
Power supply
BEV unit A
BEV unit B
Most
downstream
BEV unit
Most
downstream
indoor unit
Indoor unit A
Indoor unit B
For use with 2
remote controllers
Outdoor unit
01_EN_3P086156-10X.fm Page 12 Wednesday, April 15, 2009 3:48 PM