20
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Electrical installation
Installer and user reference guide
118
REMA5+REYA8~20A7Y1B
VRV 5 heat recovery
4P687640-1 – 2022.07
a
a
A
B
b
b
b
b
b
b
h
e
f
g
g
d
c
a
Outdoor unit
b
Indoor unit + BS unit
c
Main line
d
Branch line 1
e
Branch line 2
f
Branch line 3
g
No branch is allowed after branch
h
Central user interface (etc...)
A
Outdoor/indoor transmission wiring
B
Master/slave transmission wiring
NOTICE
Sheathed and shielded cables are required for transmission wiring between outdoor
unit and BS unit.
For the above wiring, always use vinyl cords with 0.75 to 1.25 mm
2
sheath or cables
(2-core wires).
Example:
a
b
f
c
f
e
g
d
c
B
i
i
h
h
a
Field power supply (with earth leakage protector)
b
Main switch
c
Earth connection
d
Outdoor unit
e
Indoor unit
f
User interface
g
Branch selector (BS*)
h
Circuit breaker
i
Fuse
Power supply 3N~ 50 Hz
Power supply 1~ 50 Hz
Earth wiring
20.1.3 Guidelines when knocking out knockout holes
To punch a knockout hole, hit on it with a hammer.
