Daikin SV1A25AJV1B - Page 94

16 | Electrical installation
Installer and user reference guide
94
SV1A25AJV1B+SV4~8A14AJV1B
VRV 5 safety valve unit
4P749917-1 – 2023.09
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
th
SV unit are connected to the terminals F1/F2
(Outdoor unit) on terminal block X3M on the (n+1)
th
SV unit.
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… connect…
one indoor unit where branch pipes
are NOT joined
the terminals F1/F2 (Indoor unitX) on the
SV unit to the F1/F2 terminals on the
corresponding indoor unit.
multiple indoor units connected to
the same branch
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.
joined branch pipes 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.
Example
INDOOR
UNIT
A
a
c
b
B1
d
INDOOR
UNIT
B
INDOOR
UNIT
C
INDOOR
UNIT
D
OUT-
DOOR
UNIT
SV
UNIT
F1
F2
F1
F2
F1
F2
F1
F2
F1
F2
F1
F2
TO
IN/D
TO
OUT/D
F1
F2
F1
F2
F1 F2
F1 F2 F1 F2 F1 F2F1 F2
INDOOR
UNIT
A
INDOOR
UNIT
B
INDOOR
UNIT
C
INDOOR
UNIT
D
OUT-
DOOR
UNIT
SV
UNIT
F1
F2
F1
F2
F1
F2
F1
F2
F1
F2
F1
F2
A1 B2 C
A2
a SV unit 1
b SV unit 2
c Outdoor unit