17
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Electrical installation
Installer and user reference guide
66
FXSN50~112A2VEB
CO₂ Conveni-Pack: indoor unit
4P602817-1A – 2020.05
IN/D OUT/D
F
1
F
2
F
1
F
2
Control box
P
1
P
2
P
1
P
2
P
1
P
2
P
1
P
2
P
1
P
2
F
1
F
2
T
1
T
2
P
1
P
2
F
1
F
2
T
1
T
2
P
1
P
2
F
1
F
2
T
1
T
2
P
1
P
2
F
1
F
2
T
1
T
2
L N
L N
L N
L N
a
d
c
b
N
L
N
L
N
L
N
L
a
Outdoor unit
b
Indoor unit
c
User interface
d
Most downstream indoor unit
▪
Example:
Group control or use with 2 user interfaces.
IN/D OUT/D
F
1
F
2
F
1
F
2
Control box
P
1
P
2
F
1
P
1
P
2
F
2
T
1
T
2
P
1
P
2
F
1
F
2
T
1
T
2
P
1
P
2
F
1
F
2
T
1
T
2
P
1
P
2
F
1
F
2
T
1
T
2
P
1
P
2
P
1
P
2
N
N
L
L
N
L
L N
L N
b
c
e
d
a
a
Outdoor unit
b
Indoor unit
c
User interface (controls 3 indoor units)
d
Most downstream indoor unit
e
For use with 2 user interfaces
▪
Setting master unit (Cooling/Heating masterhood).
In case of group control,
connect the user interface wiring directly to the master unit. Do not connect user
interfaces directly to slave units. Slave units are restricted in their operation by
the master unit (e.g. 1 outdoor unit does not allow for 1 indoor unit to run in
cooling operation while another runs in heating operation). For setting using the
user interface, refer to the manual or reference guide of the user interface.
INFORMATION
In case of group control, it is not necessary to assign a group address to the indoor
unit. The group address is automatically set when the power is turned on.
17.3 To connect appropriate measures for appliances filled with CO₂
Appropriate measures are field supplied. For details on how to connect wiring to
the appropriate measures, refer to the documentation of the used appropriate
measures.
1
Determine the minimum number of appropriate measures for the room in
accordance with
"15.1.2 Additional installation site requirements for CO₂
45].
2
Connect the appropriate measures to the indoor unit terminal block, symbols
T1, T2.
