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Mitsubishi FDC121KXZEN1-W - Page 22

Mitsubishi FDC121KXZEN1-W
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(1) When one outdoor unit is used.
(1) The signal lines can also be connected using the method shown below.
Indoor and outdoor signal wires
Indoor and outdoor signal lines do not have a polarity.
Any of the connections in the following illustration can be made.
(2) When plural outdoor units are used
Outdoor unit Outdoor unit
Signal line
Refrigerant pipe
Network connector
Network connector
Earth wire is giving slack.
FDC112155KXZES1-W (Three-phase)
Outdoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Outdoor unit
Outdoor unit
Indoor unit
Indoor unit
Indoor unit
Outdoor unit
Indoor unit
Indoor unit
Outdoor unit
Indoor unit
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Outdoor signal line
terminal block
Indoor signal line
terminal block
Loop wiring prohibited.
The signal lines cannot form a
loop, so the wirings shown as
.......
in the diagram are
prohibited.
Power cable and signal line connection
Signal terminal block
Wiring label
Outgoing cable direction
M4 screw
Important
Connect the signal line between indoor unit and outdoor unit to A1 and B1.
Connect the signal line between outdoor units to A2 and B2.
Please use a shielded cable for a signal line and connect a shielding earth at all the indoor units and outdoor units.
1 B1
A1B1 A2B2
A1
B1
A1
B1
A1B1 A2B2 A1B1 A2B2
7-1. Unit address setting
Cable clamp
1 Signal line between the indoor unit and the outdoor unit.
2 Signal line between the outdoor units.
1
2
Attention
9.5mm or less
FDC90155KXZEN1-W (Single phase) FDC112155KXZES1-W (Three phase)
For M4
9.5mm or less For M4
For M3.5
6.6mm or less
For cabling of the power source terminal block,
use crimp terminals of the figure shown below.
For cabling of the signal line terminal block,
use crimp terminals of the figure shown below.
Remote controller wiring specifications
Length (m)
100 to 200
to 300
to 400
  to 600
Wire size
0.5mm
2
× 2 cores
0.75mm
2
× 2 cores
1.25mm
2
× 2 cores
2.0mm
2
× 2 cores
Specification
250V 30A
Part No.
SSA564A161 Spare part is PCA006A091A.
(1) For the remote controller the standard wire is 0.3mm
2
x 2 cores. The max. length is up
to 600m. When the wire is more than 100m long, use the wire shown in the table.
Main fuse specification
(FDC90-155KXZEN1-W only)
7. CONTROL SETTINGS
This control system controls the controllers of more than one air conditioner's outdoor unit, indoor unit and remote control unit through communication control, using the
microcomputers built in the respective controllers. Address setting needs to be done for both outdoor and indoor units. Turn on power in the order of the outdoor units and
then the indoor units.
Use 1 minute as the rule of thumb for an interval between them.
The communication protocol can be choosen from following two types. One of them is the conventional Superlink (hereinafter previous SL) and the other is the new
Superlink (hereinafter new SL). These two communication protocols have their advantages and restrictions as summarized in a table in 6. ELECTRICAL WIRING
WORK” so please choose a desirable one meeting your installation conditions such as connected indoor units and centralized controller.
When signal cables are connected into a network invol
ving outdoor units, indoor units or centralized control equipment that do not support new SL, please select
communications in the previous SL mode, even if the refrigerant system is separated from theirs.
When communication is established after setting addresses, check the communication protocol with the 7-segment display panel of the outdoor unit.
It holds cables in place and protect the terminal
connection from external force.
Give adequate slack to cables in fastening them.
As like the refrigerant pipe, it can be let out in
any of the following directions:
side right, front, rear and downward.
The wiring label is attached on the back side of
the service panel.
SL SL
FDC90155KXZEN1-W (Single-phase)
'20 • KX-T-373
-
20
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