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Specifications for communication wiring
Design of communication wiring
Summary of communication wiring
Header outdoor
Central control
Uv Uv Uh Uh
SHIELD
Uc Uc
SHIELD
Uv Uv Uh Uh
device
Uh
U3 U4
Control wiring between outdoor units (Shield wire)
Control wiring between indoor and outdoor units (Shield wire)
Control wiring between indoor units (Shield wire)
A B
U1 U2
U1 U2
Uv
Uv
n I
d
o
r o
u
n
t i
Indoor unit
A B
Remote controller
Remote controller
Communication wiring and central control wiring use 2-core non-polarity wires.
Use 2-core shield wires to prevent noise trouble.
In this case, ends of the communication wire must be grounded.
Use 2-core non-polarity wire for remote control. (A, B terminals)
Use 2-core non-polarity wire for wiring of group control. (A, B terminals)
Follower outdoor
SHIELD
Uc Uc
SHIELD
A B
A B
U
U1 U2
Uv
n I
d
o
r o
u
n
t i
Indoor unit
A B
A B
Remote controller
(Group control)
– 25 –
v
U
v
A B
EN
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