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6 Installation
Refnet joint
Refnet header
VRV DX indoor units
5.4
Preparing electrical wiring
5.4.1
Safety device requirements
The power supply must be protected with the required safety
devices, i.e. a main switch, a slow blow fuse on each phase and an
earth leakage protector in accordance with the applicable legislation.
Selection and sizing of the wiring should be done in accordance with
the applicable legislation based on the information mentioned in the
table below.
Model
Minimum circuit
ampacity
RXYSQ6_Y1
14.1 A
Transmission wiring
Transmission wiring
Maximum wiring length
(= distance between outdoor and
furthest indoor unit)
Total wiring length
(= distance between outdoor and
all indoors)
If the total transmission wiring exceeds these limits, it may
result in communication error.
6
Installation
6.1
Overview: Installation
This chapter describes what you have to do and know on-site to
install the system.
Typical workflow
Installation typically consists of the following stages:
▪ Mounting the outdoor unit.
▪ Mounting the indoor units.
▪ Connecting the refrigerant piping.
▪ Checking the refrigerant piping.
▪ Charging refrigerant.
▪ Connecting the electrical wiring.
Installer and user reference guide
14
Example 1 (VRV DX indoor units)
Example 1.2
a
H1
c
d
1
2
Example 1.3
a
b
c
d
1
2
3
Recommended
Power supply
fuses
16 A
3N~ 50 Hz
380-415 V
Vinyl cords with 0.75 to 1.25 mm²
sheath or cables (2‑core wires)
300 m
600 m
i
A
B
k
b
j
7
8
H2
e
f
g
h
3
4
5
6
H1
e
f
g
h
i
4
5
6
7
8
H2
▪ Finishing the outdoor installation.
▪ Finishing the indoor installation.
INFORMATION
For installation of the indoor unit (mounting the indoor unit,
connecting the refrigerant piping to the indoor unit,
connecting the electrical wiring to the indoor unit ...), see
the installation manual of the indoor unit.
6.2
Opening the units
6.2.1
About opening the units
At certain times, you have to open the unit. Example:
▪ When connecting the refrigerant piping
▪ When connecting the electrical wiring
▪ When maintaining or servicing the unit
DANGER: RISK OF ELECTROCUTION
Do NOT leave the unit unattended when the service cover
is removed.
6.2.2
To open the outdoor unit
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
2
1
1×
RXYSQ6T7Y1B9
VRV IV-S system air conditioner
4P404677-1A – 2016.03
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Troubleshooting
