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17 Electrical installation
For earth connections, use the following method:
Wire type
Single-core wire
Or
Stranded conductor
wire twisted to "solid-
like" connection
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
17.4
To route and fix the
interconnection wiring
NOTICE
Sheathed
and
shielded
interconnection wiring between outdoor unit and SV unit.
Interconnection wiring can be routed through the front side only. Fix
it to the upper mounting hole.
5~12 HP
A
b
a
A
a
Interconnection wiring (possibility 1)
b
Interconnection wiring (possibility 2)
c
Tie wrap. Fix to factory-mounted low voltage wiring.
(a)
Knockout hole has to be removed. Close the hole to
avoid small animals or dirt from entering.
Installation and operation manual
42
Installation method
b
c
d
a
e
f
cables
are
required
for
14~20 HP
c
c
c
d
A
b
a
(a)
(a)
5~12 HP
a e
X1A
a
Wiring between the units (indoor-outdoor) (F1/F2 left)
b
Internal interconnection wiring (Q1/Q2)
c
Plastic bracket
d
Tie wrap (field supply)
e
P-clamp for cable shield earthing
Fix to the indicated plastic brackets using field supplied clamping
material.
The indoor F1/F2 interconnection wiring MUST be shielded wire.
The shielding is earthed via a metal P-clamp (e) (only at outdoor
c
unit). Strip the insulation up to the shielding mesh, to provide full
contact of the earth with the shielding.
c
17.5
To connect the interconnection
wiring
The wiring from the indoor units must be connected to the F1/F2
(In‑Out) terminals on the PCB in the outdoor unit.
d
See
"17.2 Specifications of standard wiring
wiring requirements.
a
1
TO
TO
TO
MULTI
IN/D
OUT/D
UNIT
F1 F2 F1 F2
Q1 Q2
b
1
INDOOR
INDOOR
INDOOR
INDOOR
UNIT
UNIT
UNIT
UNIT
A
B
C
D
F1 F2 F1 F2 F1 F2 F1 F2
F1 F2
F1 F2
a1
Unit A (master outdoor unit)
a2
Unit B (slave outdoor unit)
a3
Unit C (master outdoor unit with direct connection to
indoor units)
b1
SV unit 1
b2
SV unit 2
14~20 HP
b
a b
e
d
d
e
d
d
components" [ 4 41] for
a
a
2
3
TO
TO
TO
TO
MULTI
IN/D
OUT/D
IN/D
OUT/D
UNIT
F1 F2 F1 F2 Q1 Q2
F1 F2 F1 F2 Q1 Q2
d
F1 F2
b
2
OUT-
SV
DOOR
UNIT
UNIT
F1 F2 F1 F2
F1 F2 F1 F2
c
F1 F2
F1 F2
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P739915-1 – 2023.12
c
d
d
TO
TO
MULTI
UNIT
F1 F2
OUT-
SV
DOOR
UNIT
UNIT
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