Toshiba BMS-IFBN1281U-UL - Wiring for Non-U Series Outdoor Units

BN interface Installation Manual
12
-EN
When the connected outdoor units are other than Super Multi u series (U series)
Wiring specifications
REQUIREMENT
When wiring the control wiring between indoor and outdoor units/central control wiring and the control wiring between outdoor
units, use the same wire type and diameter for each line.
Using a mixture of different wire types and diameters may cause a communication error.
System diagram
* The wiring specifications in the system diagram above are the same even when the indoor unit or remote controller are other
than the U series.
Item
Communication line
Control wiring between indoor and outdoor units and central control
wiring
Wire diameter
AWG16: Up to 3281 ft (1000 m)
AWG14: Up to 6560 ft (2000 m)
Wire type 2-core, non-polar
Wire types that can be used Shielded wire
U2
U4
U3 U4
U3 U4
U6
U4
U1
Uv Uv Uv Uv
U2
A
B
U6
U4
U1
U2
AB
U6
U4
U1
U2
AB
U6
U4
U1
U2
AB
U1
U3
U2
U5 U6
U3 U4
U1
U2
U5 U6
U3 U4
U1
U2
U5 U6
U3 U4
U1
LINK (Uh)
Central control
device
<Other than U
series>
Outdoor unit
(Super Module
Multi i series
• Super Multi mini)
<U series>
Indoor unit *
<U series>
Remote
controller *
[Central control wiring/Control wiring between indoor
and outdoor units]
(L1+L2+L3) = Up to 6560 ft (2000 m)
[Control wiring between indoor and outdoor units]
L4 = Up to 328.1 ft (100 m)