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Power supply wire
Recommended wire diameter and wire length for power supply wire.
Power supply wiring
Control wire
Control wiring between indoor units, and outdoor unit
(2-core shielded wire)
Communication line
TU2C-Link models (U series) can be combined with TCC-Link models (other than U series).
For details of communication type, refer to the following table.
Communication type and model names
Communication
type
(U series and future models)
MMY-MUP
Outdoor unit
This letter indicates U series model.
MM -UP
Indoor unit
This letter indicates U series model.
RBC-A
U
Wired remote
controller
This letter indicates U series model.
RBC-AXU
Wireless remote
controller kit &
This letter indicates U series model.
receiver unit
U series outdoor unit : SMMS-u (MMY-MUP
Other than U series outdoor unit : SMMS-i, SMMS-e etc. (MMY-MHP
35-EN
Wire size: 2 × AWG12
Up to 164'1" (50 m)
Ground
1 × AWG12 or thicker
(Up to 3280'10 (1000 m)) AWG16
Wire size
(Up to 6561'8" (2000 m)) AWG14
TU2C-Link
TCC-Link
(Other than U series)
O
h t
r e
h t
a
n
U
s
r e
e i
s
M
M
- Y
M
H
P
M
C
- Y
M
H
P
M
M
- Y
M
A
P
O
h t
r e
h t
a
n
U
s
r e
e i
s
M
M
-AP
O
h t
r e
h t
a
n
U
s
r e
e i
s
O
h t
r e
h t
a
n
U
s
r e
e i
s
)
)
<In the case of combining with outdoor units of Super Modular Multi System u series (SMMS-u)>
U line and Uc line (L2, L3, L4)
v
W
2 (
c -
o
e r
s
h
e i
d l
w
r i
, e
n
o
n
p -
o
a l
t i r
) y
U line (L1)
h
W
2 (
c -
o
e r
s
h
e i
d l
w
r i
, e
n
o
n
p -
o
a l
t i r
) y
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)
REQUIREMENT
For connection of Uv line / Uc line or Uh 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
<U series>
Outdoor unit
(SMMS-u)
<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.
– 18 –
AWG20
( Up to 1640'5" (500 m))
i
e r
s
z i
e
:
AWG18 to AWG16
( Up to 3280'10" (1000 m))
AWG18 to AWG16
( Up to 3280'10" (1000 m))
i
e r
s
z i
e
:
AWG14
( Up to 6561'8" (2000 m))
[
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)
EN
EN
ID
36-EN
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