20 | Electrical installation
Installer and user reference guide
119
RXYSA8~12AMY1B
VRV 5-S system air conditioner
4P752782-1A – 2024.02
a Outdoor unit
b Indoor unit + SV unit
c Indoor unit (direct connection)
d Main line
e Branch line 1
f Branch line 2
g Branch line 3
h Branch line 4
i No branch is allowed after branch
j Central user interface (etc...)
NOTICE
Sheathed and shielded cables are required for interconnection wiring between:
▪ Outdoor unit and SV unit
▪ Outdoor unit and indoor units that are directly connected to the outdoor unit
Example:
a Field power supply (with earth leakage protector)
b Main switch
c Earth connection
d Outdoor unit
e Indoor unit
f User interface
g SV unit
h Circuit breaker
i Fuse
j Cool/heat selector
20.1.3 Guidelines for making knockout holes
Punch out the knockout by tapping on the attachment points with a flat head
screwdriver and a hammer.