5 Installation
Installation and operation manual
14
RXYSQ6T7Y1B9
VRV IV-S system air conditioner
4P397285-1B – 2016.03
2
Fix the label on the inside of the outdoor unit near the gas and
liquid stop valves.
5.7
Connecting the electrical wiring
5.7.1
Field wiring: Overview
Field wiring consists of power supply (always including earth) and
indoor-outdoor communication (= transmission) wiring.
Example:
e
d
F1/F2
(16 V)
F1/F2
(16 V)
Y1
220-240 V
1~ 50 Hz
380-415 V
3N~ 50 Hz
c
a
b
a
Main switch
b
Earth connection
c
Power supply wiring (including earth) (sheathed cable)
F1/F2
Transmission wiring (sheathed cable)
Y1
Outdoor unit
d
Indoor unit
e
User interface
5.7.2
Guidelines when knocking out knockout
holes
NOTICE
Precautions when making knockout holes:
▪ Avoid damaging the casing.
▪ After making the knockout holes, we recommend you
remove the burrs and paint the edges and areas
around the edges using repair paint to prevent rusting.
▪ When passing electrical wiring through the knockout
holes, wrap the wiring with protective tape to prevent
damage.
b
c
a
a
Knockout hole
b
Burr
c
Sealant etc.
5.7.3
Guidelines when connecting the electrical
wiring
Tightening torques
Wiring
Screw size
Tightening torque
(N•m)
Power supply wiring
(power
shielded ground)
M5
2.2~2.7
Transmission wiring
M3.5
0.8~0.97
5.7.4
To connect the electrical wiring on the
outdoor unit
NOTICE
▪ Follow the wiring diagram (delivered with the unit,
located at the inside of the service cover).
▪ Make sure the electrical wiring does NOT obstruct
proper reattachment of the service cover.
1
Remove the service cover.
2
Connect the transmission wiring as follows:
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
F1 F2
a
b
X2M
TO OUT/D
TO IN/D
a
Use the conductor of sheathed wire (2 wire) (no polarity)
b
Terminal board (field supply)
WARNING
You must use shielded wire and connect the earth to the
transmission terminal (X2M).
C/H SELECTOR
A B C
F1 F2 F1 F2
TO IN/D
UNIT
TO OUT/D
UNIT
a
a
Earth
3
Connect the power supply as follows:
3N~ 50 Hz
380-415 V
L1 L2 L3
L1 L2 L3
N
X1M
a
b
c
a
Earth leakage circuit breaker
b
Fuse
c
Power supply cable
4
Fix the cables (power supply and transmission wiring) with
cable ties.
