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Design of 3WAY VRF SYSTEM
2
- 25
1
2
3
4
5
6
7
8
3. Electrical Wiring
(1)
(2)
(3)
(4)
NOTE
Refer to Section 2 “3-2. Recommended Wire
Length and Wire Diameter for Power Supply
System” for the explanation of “A,” “B,” “C,”
and “D,” in the above diagram.
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.
Refrigerant Circuit (R.C.) address should be
set before turning the power on.
Regarding the R.C. address setting, refer to
Section 5 "TEST RUN." Address setting can be
executed by remote controller automatically.
3-3. Wiring System Diagram
Indoor Unit
L1
L2
U1 U2
R1
R2
1(L1) 2(L2)
U1 U2 R1 R2
1
(L1)
2
(L2)
1
(L1)
2
(L2)
U1 U2
U1 U2
Power
supply
Power
supply
Power
supply
Power
supply
Unit
control
Line
Unit
control
Line
Unit
control
Line
Unit
control
Line
Remote
control
Line
Remote
control
Line
U1, E1 Types
7P terminal board
Y1, D1, T1, F1, M1, P1, R1 Types
6P terminal board
5P terminal board
5P terminal board
K1 Type
Model : S-07MK1U6
S-09MK1U6
S-12MK1U6
K1 Type
Model : S-18MK1U6
S-19MS1U6
S-24MK1U6
4P terminal board
L1
L2
L3
1
2 3
4
4P terminal board
Inter-outdoor
unit control
wiring
Inter-unit
control
wiring
Outdoor Unit
*
*
*
*
2
1
2
1
2
1
B
C
A
L1
L2
L1
L2
L1
L2
L1
L2
2
1
A
B
A
A
U2
U1
L2
L1
R2
R1
U2
U1
L2
L1
R2
R1
U2
U1
L2
L1
R2
R1
U2
U1
L2
L1
2
1
B
1
3
Remote
Controller
CONNECTOR
2P(WHT)
RC
(BLU)
WHT
BLK
WHT
BLK
WHT
BLK
WHT
BLK
Ground
*
*
L1
L2
L3
L1
L2
L3
D
4
2
3
1
4
3
L2
L1
L3
L2
L1
L3
Power supply
208 / 230V, 60Hz, 1-PH
K1 Type
Indoor
unit (No. 1)
Remote
Controller
WHT
BLK
Ground
Power supply
208 / 230V, 60Hz, 1-PH
Indoor
unit (No. 2)
Remote
Controller
WHT
BLK
Ground
Power supply
208 / 230V, 60Hz, 1-PH
Indoor
unit (No. 3)
Ground
Group control:
Indoor
unit (No. n)
Power supply
208 / 230V, 60Hz, 1-PH
Ground
Outdoor unit
INV unit
Inter-outdoor unit control wiring
Ground
Power supply
208 / 230V, 60Hz, 3-PH
Outdoor unit
INV unit
Power supply
208 / 230V, 60Hz, 3-PH
Disconnect switch
(Field Supply)
*
ALWAYS COMPLY WITH NATIONAL AND
LOCAL CODE REQUIREMENTS.
* NOTE:
Disconnect Switch may be needed by the
National/Local code.
TD831158-00̲3WAY̲VRF̲SYS.indb 25
TD831158-00̲3WAY̲VRF̲SYS.indb 25
2012/01/23 17:30:16
2012/01/23 17:30:16