15 Electrical installation
Installation and operation manual
32
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546220-1C – 2020.10
a
b
d
d
d
c
b
g
g
h
h
c
f
f
f
h
e
e
e
a
h
h
h
h
h
i
a
Field power supply (with earth leakage protector)
b
Main switch
c
Earth connection
d
Outdoor unit
e
Indoor unit
f
User interface
g
Indoor power supply wiring (sheathed cable) (230 V)
h
Transmission wiring (sheathed cable) (16 V)
i
Outdoor power supply wiring (sheathed cable)
Power supply 3N~ 50 Hz
Power supply 1~ 50 Hz
Earth wiring
15.4
To route and fix the transmission
wiring
Transmission wiring can be routed through the front side only. Fix it
to the upper mounting hole.
b
a
A
b a
c
c
c
d
c
d
c
8~12 HP
14~20 HP
A
A
a
Transmission wiring (possibility 1)
(a)
b
Transmission wiring (possibility 2)
(a)
. Fix to pipe insulation
with tie wraps.
c
Tie wrap. Fix to factory-mounted low voltage wiring.
d
Tie wrap.
(a)
Knockout hole has to be removed. Close the hole to avoid
small animals or dirt from entering.
X1A
c
d
a
b
a b
8~12 HP
14~20 HP
Fix to the indicated plastic brackets using field supplied clamping
material.
a
Wiring between the units (indoor-outdoor) (F1/F2 left)
b
Internal transmission wiring (Q1/Q2)
c
Plastic bracket
d
Field supplied clamps
15.5
To connect the transmission wiring
The wiring from the indoor units must be connected to the F1/F2
(In‑Out) terminals on the PCB in the outdoor unit.
Tightening torque for the transmission wiring terminal screws:
Screw size
Tightening torque (N•m)
M3.5 (A1P)
0.8~0.96
In case of single outdoor unit installation
F
1
F
2
F
1
F
2
Q
1
Q
2
F1
F1
F2
F2 Q1 Q2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
b
c
a
d
e
TO IN/D UNIT TO OUT/D UNIT TO MULTI UNIT
A1P
a
Outdoor unit PCB (A1P)
b
Use the conductor of sheathed wire (2 wire) (no polarity)
c
Terminal board (field supply)
d
Indoor unit
e
Outdoor unit
In case of multi outdoor unit installation
F1 F2 F1 F2 Q1 Q2
Q1 Q2
A1P
d
d
e
f
b
a
c
Q1 Q2
a
Unit A (master outdoor unit)
