Toshiba MMD-UP0051BHP-E Installation Manual page 18

<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.
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.
33-EN
1.25 mm² (Up to 1000 m)
Wire size :
2.0 mm² (Up to 2000 m)
Wire size : 1.25 to 2.0 mm² (Up to 100 m)
[Communication line]
(L1+L2+L3) = Up to 2000 m
– 17 –
Remote controller wiring
• 2-core with non-polarity wire is used for wiring of 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
T t o l a i w e r e l n g h t f o e r m o e t c o t n o r e l l i r t n r e
CAUTION
• The remote controller wire (Communication line) and AC 208 – 240V 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 8 Electrical connection.
Indoor unit Indoor unit
L
Remote
controller
L1
wiring
Remote
Remote controller inter-unit wiring
controller
Wire size: 0.5 mm² to 2.0 mm²
In case of wired type only
In case of wireless type
included
u - n t i w r i n i g = L 1 + L 2 + ... L n
Indoor unit Indoor unit
L 2 L n
Up to 500 m
Up to 400 m
U p o t 2 0 0 m
34-EN