Wiring Specifications - Toshiba RAV-SM562KRT-E Service Manual

3.1.4 Wiring Specifications

Number of wires
2 Up to 1000m: 1.25mm2 stranded wires
Up to 2000m: 2.0mm2 stranded wires
• A 2-wire non-polarity cable is used.
• The cable length depends on each central control system.
When used in a system including multiple air conditioners, the length includes the length of all wires
between indoor and outdoor units on the side of multiple air conditioners.
• Use 2-wire shield cable (MVVS) to protect from noise.
• Joint shield wire between indoor units by closed-end terminating, and leave its end open with insulation
processing.
Make one-point grounding at the indoor unit side. Set the terminating resistors.
(Central control for custom indoor units only)
Central controller
U1 U2
B
Note
Outdoor
unit
1 2 3
Indoor
U3 U4 1 2 3
unit
A B
R/C
Size
A Joint shield wire between indoor units by closed-end terminating.
N
o
B Leave the end of the shield wire open with insulation processing.
t
e
C Make one-point grounding at the indoor unit side.
s
1 2 3
A
Note
Header
U3 U4 1 2 3
A B
R/C
(Group operation)
Specification
MVVS
1 2 3
Follower
1 2 3
A B
R/C
– –
64