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<In the case of combining with outdoor units other than Super Modular Multi System u series (SMMS-u)>
Control wiring between indoor units, and outdoor unit (L2, L3)
(2-core shield wire, non-polarity)
Central control line wiring (L1)
(2-core shield wire, non-polarity)
Control wiring between outdoor units (L4)
(2-core shield wire, non-polarity)
• 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
AWG16
(Up to 3280'10'' (1000 m))
Wire size :
AWG14
(Up to 6561'8'' (2000 m))
Wire size :
AWG16 to AWG14
(Up to 328'1'' (100 m))
[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 the remote controller wiring and group remote controllers wiring.
Remote controller wiring, remote controller inter-unit
wiring
Total wire length of remote controller wiring and remote
controller inter-unit wiring = L + L1 + L2 + ... Ln
Max. length of each remote control wiring between indoor units = L1, L2, ... , Ln
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
specifi cations and maximum number of connectable indoor units will be changed. Pay attentions to their
communication specifi cations when carrying out the installation, maintenance, or repair. For its details, refer
to the "Communication line" in 9 Electrical connection.
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: 0.5 mm
2
to 2.0 mm
2
In case of one remote controller
In case of two remote controller
Incorrect
Outside Air
Indoor unit
Unit
L
Remote
controller
Up to 1640'5'' (500 m)
Up to 1312'4'' (400 m)
Up to 656'2'' (200 m)
Outside Air
Unit
L1
38-EN
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