9
English
No. 3 system When including BS unit
Outdoor unit
BS unit
L1 L2
Indoor unit A
Remote controller
(option)
F
F
1
2
F
F
1
2
F
F
1
2
F
F
1
2
IN/D
IN/D
OUT/D
OUT/D
1
P
P
2
1
F
2
L2
F
L1
1
2
T T
1
P
2
P
Power supply
single phase
60Hz 208-230V
〈
Precautions when laying power supply wiring
〉
Wiring of different thicknesses cannot be connected to the
•
power supply wiring terminal block. (Slack in the power
supply wiring may cause abnormal heat.)
Use sleeve-insulated round crimp-style terminals for con-
•
nections to the power supply wiring terminal block. When
none are available, connect wires of the same diameter to
both sides, as shown in the fi gure.
Electric wire
Round crimp-style terminal
Insulation sleeve
Connect wires of
the same gauge to
both sides.
Do not connect
wires of the same
gauge to one side.
Do not connect
wires of different
gauges.
Follow the instructions are below if the wiring may get
very hot due to slack in the power supply wiring.
For wiring, use the designated power supply wiring and
•
connect fi rmly, then secure to prevent outside pressure
being exerted on the terminal board.
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.
Terminal block
Tightening torque (ft · lbf)
Remote controller / transmission
wiring terminal block (6P)
0.58 – 0.72
Power supply wiring terminal
block (3P)
0.87 – 1.06
CONTROL BY 2 REMOTE CONTROLLERS (Con-
9-2
trolling 1 indoor unit by 2 remote controllers)
When using 2 remote controllers, one must be set to “MAIN”
•
and the other to “SUB”.
MAIN/SUB CHANGEOVER
Insert a
(1)
screwdriver into the recess between the
upper and lower part of remote controller and, work-
ing from the 2 positions, pry off the upper part.
The remote controller PC board is attached to the upper
part of remote controller.
Insert the screwdriver here and gently work
off the upper part of remote controller.
Lower part of
remote controller
Upper part of
remote controller
Turn the MAIN/SUB changeover switch on one of the
(2)
two remote controller PC boards to “S”.
(Leave the switch of the other remote controller set to “M”.)
S
M
S
S
M
(Factory setting)
Only one remote controller
needs to be changed
if factory settings have
remained untouched.
Remote controller
PC board
Wiring Method
(See ‘‘8. ELECTRIC WIRING WORK’’)
Remove the terminal block box cover.
(3)
Add remote controller 2 (SUB) to the terminal block
(4)
for remote controller (P¹, P²) in the terminal block box.
(There is no polarity.)
Remote controller wiring
terminal block
Remote
controller 2
(SUB)
Remote
controller 1
(MAIN)
1
P
2
P
1
F
2
F
1
T
2
T
FORCED
OFF
REMOTE
CONTRL
TRANSMISSION
WIRING
01_EN_3P250363-1.indd 9
01_EN_3P250363-1.indd 9
6/18/2009 2:01:20 PM
6/18/2009 2:01:20 PM
