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14 Electrical installation
Component
Maximum allowable length of
field wiring
Recommended field fuse
Residual current device
(a)
MCA=Minimum circuit ampacity. Stated values are maximum
values (see electrical data of indoor unit for exact values).
14.2
To connect the electrical wiring to
the indoor unit
NOTICE
▪ Follow the wiring diagram (delivered with the unit,
located at the inside of the service cover).
▪ For instructions on how to connect the optional
equipment, see the installation manual delivered with
the optional equipment.
▪ Make sure the electrical wiring does NOT obstruct
proper reattachment of the service cover.
It is important to keep the power supply and the transmission wiring
separated from each other. In order to avoid any electrical
interference the distance between both wirings should ALWAYS be
at least 50 mm.
NOTICE
Be sure to keep the power line and transmission line apart
from each other. Transmission wiring and power supply
wiring may cross, but may NOT run parallel.
1 Remove the service cover (see
cover" [ 4 14]).
2 User interface cable: Connect the cable to the terminal block
(symbols P1, P2).
3 Transmission cable: Connect the cable to the terminal block
(make sure the symbols F1, F2 match with the symbols on the
outdoor unit).
4 Fix user interface cable together with the transmission cable
with a tie wrap (accessory).
5 Power supply cable: Connect the cable to the terminal block
(L, N, earth).
a
Circuit breaker
b
Residual current device
6 Seal all gaps with a sealing material (field supply) to prevent
small animals from entering the system.
7 Reattach the service cover (see
cover" [ 4 14]).
Installation and operation manual
20
Class
15+20 25~40
50
63
User interface - ≤ 500 m
6 A
Must comply with applicable
legislation
"12.2.5 To open the service
a
b
"12.2.6 To close the service
c
d
b
P1 P2
F1 F2 T1 T2
R-Ctrl D III-Net
a
Power supply wiring terminal
b
Transmission and user interface wiring terminal
c
Power supply wiring
d
Transmission and user interface terminal wiring
e
Small tie wraps 2× (accessory)
Electrical wiring route:
a
a
Electrical wiring
Complete system example
1 user interface controls 1 indoor unit.
a
Control box
IN/D OUT/D
F
F
F
F
1
2
1
2
N
L
N
L
N L
N L
P
P
F
F
T
T
P
P
F
F
1
2
1
2
1
2
1
2
1
b
P
P
P
P
1
2
1
2
c
a
Outdoor unit
b
Indoor unit
c
User interface
d
Most downstream indoor unit
NOTICE
Group control connection is NOT allowed.
CAUTION
▪ Each indoor unit has to be connected to a separate
user interface. Only a safety system compatible remote
controller can be used as the user interface. See
technical data sheet for remote controller compatibility
(e.g. BRC1H52/82*).
▪ The user interface has to be put in the same room as
the indoor unit. For details, please refer to the
installation and operation manual of the user interface.
L N
L
N
e
e
P1 P2
F1 F2 T1 T2
R-Ctrl D III-Net
N
L
N
L
N L
N L
T
T
P
P
F
F
T
T
P
P
F
F
2
1
2
1
2
1
2
1
2
1
2
1
2
P
P
P
P
1
2
1
2
FXAA15~63AUV1B
VRV system air conditioner
3P622285-1B – 2020.10
a
d
T
T
1
2
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