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Electrical installation
Installer and user reference guide
94
Connection for SV1A
▪ Connect the terminals F1/F2 (TO IN/D) on the control PCB in the outdoor
unit's switch box to the terminals F1/F2 (Outdoor unit) on terminal block
X3M of the first SV unit. See also the installation manual delivered with the
outdoor unit.
▪ In case of multiple SV units in the system that are connected to the same
interconnection wiring branch line, connect the terminals F1/F2 (SV unit) on
terminal block X3M of the first SV unit to the terminals F1/F2 (Outdoor unit)
on terminal block X3M on the second SV unit. Repeat the same procedure
for further SV units, where each time the terminals F1/F2 (SV unit) on
terminal block X3M on the n
(Outdoor unit) on terminal block X3M on the (n+1)
4 For all SV units, continue the interconnection wiring as follows:
▪ Connect the terminals F1/F2 (Indoor unit X) on terminal blocks X3M and
X4M to the corresponding indoor units:
In case of...
one indoor unit where branch pipes
are NOT joined
multiple indoor units connected to
the same branch
joined branch pipes
Example
a
d
INDOOR
INDOOR
INDOOR
INDOOR
UNIT
UNIT
UNIT
A
B
C
F1 F2 F1 F2 F1 F2 F1 F2
F1 F2
F1 F2
A1
B1
b
INDOOR
UNIT
F1 F2 F1 F2 F1 F2 F1 F2
A2
F1 F2
a SV unit 1
b SV unit 2
c Outdoor unit
th
SV unit are connected to the terminals F1/F2
connect...
the terminals F1/F2 (Indoor unit X) on the
SV unit to the F1/F2 terminals on the
corresponding indoor unit.
the terminals F1/F2 (Indoor unit X) on the
SV unit to the F1/F2 terminals on the first
indoor unit. Connect the F1/F2 terminals
on the first indoor unit to the F1/F2
terminals on the second indoor unit, and
so on.
one of the two terminals F1/F2 (Indoor
unit X) of the branches that are joined on
the SV unit to the F1/F2 terminals on the
corresponding indoor unit.
c
OUT-
SV
UNIT
DOOR
UNIT
D
UNIT
F1 F2 F1 F2
F1 F2
F1 F2
B2
C
INDOOR
INDOOR
INDOOR
OUT-
UNIT
UNIT
UNIT
DOOR
A
B
C
D
UNIT
F1 F2 F1 F2
th
SV unit.
TO
TO
IN/D
OUT/D
F1 F2 F1 F2
SV
UNIT
SV1A25AJV1B+SV4~8A14AJV1B
VRV 5 safety valve unit
4P749917-1 – 2023.09
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