<In the case of combining with outdoor units of Super Modular Multi System u series (SMMS-u)>
Uv line and Uc line (L2, L3, L4)
Wire size :
(2-core shield wire, non-polarity)
Uh line (L1)
Wire size :
(2-core shield wire, non-polarity)
• U (v, h, c) line means of control wiring.
Uv line : Between indoor and outdoor units.
Uh line : Central control line.
Uc line : Between outdoor and outdoor units.
• Uv line and Uc line are independent from another refrigerant line. Total length of Uv and Uc lines
(L3+L4) in each refrigerant line is up to 3280'10" (1000 m)
* Even if the indoor unit and the remote controller are "other than U series", the wiring
specification are the same.
35-EN
AWG 20
(UP to 1640'5"(500 m))
AWG 18 to AWG 16
(UP to 3280'10"(1000 m))
(UP to 3280'10"(1000 m))
AWG 18 to AWG 16
(UP to 6561'8"(2000 m))
AWG 14
[Uh line]
L1 =
UP to 6561'8" (2000 m)
[Uv and Uc line]
L2 = Up to
3280'10" (1000 m)
(L3+L4) = Up to
3280'10" (1000 m)
<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.
* Even if the indoor unit and the remote controller are "other than U series", the wiring
specification are the same.
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
Total wire length of remote control inter-unit wiring = L1 + L2 + ... Ln
– 18 –
(UP to 3280'10"(1000 m))
AWG 16
Wire size :
(UP to 6561'8"(2000 m))
AWG 14
Wire size :
AWG 18 to AWG 16 (UP to 3280'10"(1000 m))
[Communication line]
(L1+L2+L3) = Up to
6561'8"(2000 m)
L4 = Up to 328'1"(100 m)
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)
Up to 656'2" (200 m)
EN
36-EN