Design of 3WAY VRF SYSTEM
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1
2
3
4
5
6
7
8
9
NOTE
(1) See the section “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.
(2) The basic connection diagram of the indoor unit shows
the 6P 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 the separated
“SERVICE MANUAL & TEST RUN SERVICE MANUAL
(SM830246)”, page 6-7 “5. Auto Address Setting”. Address
setting can be executed by remote controller automatically.
3-3. Wiring System Diagram
*
*
*
*
*
U2
U1
L2
L1
R2
R1
2
U2
1
U1
2
1
2
1
2
1
B
C
A
L1
L2
L3
L1
L2
L1
L2
L1
L2
2
1
2
1
L1
L2
L3
D
B
A
U2
U1
L2
L1
R2
R1
U2
U1
L2
L1
R2
R1
A
A
L2
L1
L3
L2
L1
L3
*
U2
U1
L2
L1
R2
R1
2
1
B
L1
L2
2
1
ALWAYS COMPLY WITH NATIONAL AND
LOCAL CODE REQUIREMENTS.
Power supply
208 / 230V, 60Hz, 1-PH
Remote
Controller
Indoor
unit (No. n)
BLK
WHT
Ground
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, 60Hz, 3-PH
* Disconnect switch
(Field Supply)
* NOTE:
Disconnect Switch may be needed by the
National/Local code.
Remote
Controller
Remote
Controller
Indoor
unit (No. 1)
Indoor
unit (No. 2)
Indoor
unit (No. 3)
Outdoor unit
INV unit
Outdoor unit
INV unit
WHT
BLK
WHT
BLK
Ground
Ground
Ground
Group control:
Ground
Ground
Inter-outdoor unit control wiring
L2 L3L1
3P terminal board
U1 1U2 2
2P terminal board (×2)
Outdoor Unit
Inter-unit
control wiring
Inter-outdoor unit
control wiring
01_280157_Eng.indd 30 2015-11-11 9:13:01
3. ELECTRICAL WIRING
Design of 3WAY VRF SYSTEM
CAUTION
(1) When linking outdoor units in a network, see the section “ATTENTION!”.
(2) Do not install the inter-unit control wiring in a way that forms a loop.
Outdoor unit
Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit
Outdoor unit Outdoor unit
Prohibited
Prohibited
(3) Do not install inter-unit control wiring such as star branch
wiring. Star branch wiring causes mis-address setting.
Outdoor unit Indoor unit Indoor unit
Indoor unit Indoor unit
NO
Branch point
(4) If branching the inter-unit control wiring, the number of branch points should be 16 or fewer.
Outdoor unit
Outdoor unit
Outdoor unit
Indoor unit
Central Controller
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
More than 7ft. (2m) required
: Branch point
3. ELECTRICAL WIRING
7'B⡿ྥࡅ:$<LQGE
TD831183-00_北米向け3WAY.indb 22 15/12/17 16:05:12
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