15 Electrical installation
Installation and operation manual
34
SV1ASV4~8A14AJV1B
VRV 5 safety valve unit
4P709466-1 – 2023.09
a
a
A
B
b
b
b
b
b
b
h
e
f
g
g
d
c
a
Outdoor unit
b
Indoor unit + SV 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 interconnection wiring
B
Master/slave interconnection wiring
15.2
Connecting the electrical wiring
Use the following methods for installing wires:
Wire type
Installation method
Single-core wire
Or
Stranded conductor
wire twisted to "solid-
like" connection
c b
c
a
a
A
AA´
A´
a
Curled wire (single-core or twisted
stranded conductor wire)
b
Screw
c
Flat washer
Stranded conductor
wire with round crimp-
style terminal
c b
b
a
c
a
B
B
a
Terminal
b
Screw
c
Flat washer
Allowed
NOT allowed
For earth connections, use the following method:
Wire type
Installation method
Single-core wire
Or
Stranded conductor
wire twisted to "solid-
like" connection
d
a
b
c
f
e
a
Clockwise curled wire (single-core or
twisted stranded conductor wire)
b
Screw
c
Spring washer
d
Flat washer
e
Coupling washer
f
Sheet metal
15.3
To connect the electrical wiring
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.
1
25].
2
Strip insulation from the wires.
a
b
a
Strip wire end to this point
b
Excessive strip length may cause electrical shock or
leakage
Allowed
Not allowed
3
Connect the interconnection wiring as follows:
Connection for SV4A~SV8A
▪ 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
X2M
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
X2M
of the first
SV unit to the terminals F1/F2
(Outdoor unit)
on terminal
block
X2M
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 X2M on the n
th
SV unit are connected to the terminals F1/F2
(Outdoor unit)
on terminal block
X2M
on the (n+1)
th
SV unit.
Summary of Contents for VRV 5
Page 47: ......
