2
1
B
1
3
Remote
Controller
CONNECTOR
2P (WHT)
RC
(BLU)
WHT
BLK
WHT
BLK
WHT
BLK
WHT
BLK
* Disconnect switch
(
Field Supply)
*
*
*
*
*
*
U2
U1
L2
L1
R2
R1
4
2
3
1
2
1
WHT
Remote
Controller
Group control:
BLK
2
1
2
1
WHT
Remote
Controller
B
C
Indoor
unit (No. n)
Indoor
unit (No. 1)
Indoor
unit (No. 2)
Indoor
unit (No. 3)
A
Outdoor unit
INV unit
L1
L2
L3
Ground
Ground
L1
L2
L1
L2
L1
L2
L1
L2
BLK
2
1
4
3
Outdoor unit
INV unit
Power supply
208 / 230V, 60Hz, 1-PH
Power supply
208 / 230V, 60Hz, 1-PH
Power supply
208 / 230V, 60Hz, 1-PH
Power supply
208 / 230V, 60Hz, 1-PH
Power supply
208 / 230V, 60Hz, 3-PH
Power supply
208 / 230V, 3ø, ~60Hz
Ground
Ground
Ground
L1
L2
L3
Ground
D
B
A
Inter-outdoor unit control wiring
U2
U1
L2
L1
R2
R1
U2
U1
L2
L1
R2
R1
U2
U1
L2
L1
ALWAYS COMPLY WITH NATIONAL AND
LOCAL CODE REQUIREMENTS.
*
NOTE:
Disconnect Switch may be needed by the
National/Local code.
A
A
L1 L2 L3
K1 Type
4P terminal board
4P terminal board
Inter-outdoor unit
control wiring
Inter-unit
control wiring
Outdoor Unit
1234
L2
L1
L3
L2
L1
L3
(1) Refer to Section 4-2. “Recommended Wire Length and
Wire Diameter for Power Supply System” for the
explanation of “A,” “B,” “C,” and “D,” in the above
diagram.
(2) The basic connection diagram of the indoor unit shows
the 7P terminal board, so the terminal boards in your
equipment may differ from the diagram.
(3) Refrigerant Circuit (R.C.) address should be set before
turning the power on.
(4) Regarding the R.C. address setting, refer to Section 7-4.
“Auto Address Setting”. Address setting can be execut-
ed by remote controller automatically.
4-3. Wiring System Diagram
25
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