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<In the case of combining with outdoor units other than Super Modular Multi System u series (SMMS-u)>
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(L4)
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The length of the communication line (L1+L2+L3) means the total length of the inter-unit wire length
between indoor and outdoor units added with the central control system wire length.
REQUIREMENT
For connection of between indoor and outdoor units line / between outdoor and outdoor units line or central
control line, wire each line using wires with the same type and size. If different wire types and size are mixed
and used in a system, communication trouble is caused.
Central control device
<Other than U series>
Outdoor unit
(SMMS-i)
(SMMS-e)
(MiNi SMMS)
etc.
<U series>*
Indoor unit
<U series>*
Remote controller
*Even if the indoor unit and the remote controller are "other than U series", the wiring specification are
the same.
37-EN
u
n
t i
(L2, L3)
AWG16
(Up to 3280'10" (1000 m))
W
i
e r
s
z i
e
:
AWG14
(Up to 6561'8" (2000 m))
(Up to 328'1" (100 m))
W
i
e r
s
z i
e
:
AWG16 to AWG14
[Communication line]
(L1+L2+L3) = Up to 6561'8" (2000 m)
L4 = Up to 328'1" (100 m)
– 19 –
Remote control wiring
2-core with non-polarity wire is used for wiring of the remote control wiring and group remote controls wiring.
Remote control wiring, remote control inter-unit wiring
Total wire length of remote control wiring and remote control
inter-unit wiring = L + L1 + L2 + ... Ln
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CAUTION
The remote controller wire (Communication line) and AC 208-230V wires cannot be parallel to contact
each other and cannot be stored in the same conduits. If doing so, a trouble may be caused on the
control system due to noise or other factor.
If U series models (TU2C-Link) are combined with models other than U series (TCC-Link), the wiring
specifications and maximum number of connectable indoor units will be changed. Pay attentions to their
communication specifications when carrying out the installation, maintenance, or repair. For its details, refer to
the "Communication line" in 9 Electrical connection.
Outside Air
Outside Air
Unit
Remote
L
controller
wiring
L1
Remote
controller
The Outside Air Unit and indoor unit for air conditioning cannot be connected as a group control.
REQUIREMENT
After carrying out installation of additional indoor unit, relocation, or repairing, set the addresses again.
For its detail, refer to the Installation Manual attached to the outdoor unit.
Wire size: AWG20
In case of wired type only
Up to 1640'5 (500 m)
In case of wireless type included
Up to 1312'4 (400 m)
w
r i
n i
g
=
L
1
+
L
2
+
...
L
n
U
Incorrect
Indoor unit
Unit
L
L1
Remote
controller
p
o t
6
5
6
2 '
(200 m)
Outside Air
Unit
38-EN
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