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Electrical installation
Installer and user reference guide
98
R R8T7V1B
VRV IV heat pump for indoor installation
4P499898-1A – 2020.10
Branches
Maximum number of branches for unit-
to-unit cabling
16
Transmission wiring
Sh shielded cable (2 wires)
Vinyl cords
0.75~1.25 mm²
(using shielded cable for the
transmission wiring is mandatory for
5 HP, and optional for 8 HP)
Maximum wiring length
(= distance between compressor unit
and furthest indoor unit)
300 m
Total wiring length
(= distance between compressor unit
and all indoor units, and between
compressor unit and heat exchanger
unit)
600 m
If the total transmission wiring exceeds these limits, it may result in communication
error.
No branching is allowed after branching.
D
B
C
b2
b3
c1
c2
b1
a
A
A
Central user interface (etc...)
B
Compressor unit
C
Indoor unit
D
Heat exchanger unit
a
Main line. The main line is the line to which the transmission wiring of the heat
exchanger unit is connected.
b1, b2, b3
Branch lines
c1, c2
No branch is allowed after branch
