To Connect The Interconnection Wiring - Daikin VRV 5 RXYA8A7Y1B Installer And User Manual

20.3 To connect the interconnection wiring

RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P749918-1 – 2023.12
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 unit). Strip the insulation up to the
shielding mesh, to provide full contact of the earth with the shielding.
The wiring from the indoor units must be connected to the F1/F2 (In‑Out)
terminals on the PCB in the outdoor unit.
See "20.1.6 Specifications of standard 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
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
c Indoor unit
d Outdoor unit/other system interconnection (F1/F2)
▪ The interconnecting wiring between the outdoor units in the same piping system
must be connected to the Q1/Q2 (Out Multi) terminals. Connecting the wires to
the F1/F2 terminals results in system malfunction.
▪ The wiring for the other systems must be connected to the F1/F2 (Out-Out)
terminals of the PCB in the outdoor unit to which the interconnecting wiring for
the indoor units is connected.
▪ The base unit is the outdoor unit to which the interconnecting wiring for the
indoor units is connected.
Tightening torque for the interconnection wiring terminal screws:
Screw size
M3.5 (A1P)
a a
2 3
TO
TO TO
MULTI
IN/D OUT/D
UNIT
F1 F2 F1 F2 Q1 Q2 F1 F2 F1 F2 Q1 Q2
d
OUT-
SV
DOOR
UNIT
D UNIT
F1 F2 F1 F2
c
F1 F2 F1 F2
20 Electrical installation
|
4
components" [ 132] for wiring
TO
TO TO
MULTI
IN/D OUT/D
UNIT
F1 F2 F1 F2
b
2
OUT-
SV
DOOR
UNIT
UNIT
F1 F2 F1 F2
Tightening torque [N•m]
0.8~0.96
Installer and user reference guide
135