6 Installation
Installer and user reference guide
14
5TMV1B
VRV IV-S system air conditioner
4P404224-1 – 2015.03
Requirement
Limit
VRV DX
RA DX
Maximum height difference BP-BP
▪ Example 2: H4≤Limit
N/A
15 m
Maximum height difference BP-indoor
▪ Example 2: H5≤Limit
N/A
5 m
(a)
Assume equivalent piping length of refnet joint=0.5 m and refnet header=1 m (for calculation purposes of equivalent piping length, not for
refrigerant charge calculations).
Example 1 (VRV DX indoor units)
Example 2 (RA DX indoor units)
Example 1.1
a
A
h
i
j
k
l
m
n
B
C
D
E
F
G
p
b
c
d
e
f
1
2
3
4
5
6
7
8
g
H1
H2
H3
a
c
d
f
H1
BP1
g
h
b
A
l
m
BP3
18
17
13
12
11
H4
e
i
BP2
j
k
16
15
14
H2
H5
Example 1.2
a
b
c
d
e
f
i
k
j
g
h
A
B
1
2
3
4
5
6
7 8
H1
H2
Example 1.3
a
c
b
d
e
f
i
g
h
1
2
3
4
5
6
7
8
H1
H2
Refnet joint
Refnet header
BP box
1~8
VRV DX indoor units
11~18
RA DX indoor units
5.4
Preparing electrical wiring
5.4.1
About electrical compliance
Equipment complying with EN/IEC 61000‑3‑12 (European/
International Technical Standard setting the limits for harmonic
currents produced by equipment connected to public low-voltage
systems with input current >16 A and ≤75 A per phase.).
5.4.2
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
Recommended
fuses
5
29.1 A
32 A
For all models:
▪ Phase and frequency: 1~ 50 Hz
▪ Voltage: 220-240 V
▪ Transmission line section:
Transmission wiring
Vinyl cords with 0.75 to
1.25 mm² sheath or cables
(2‑core wires)
Maximum wiring length
(= distance between outdoor
and furthest indoor unit)
300 m
Total wiring length
(= distance between outdoor
and all indoors)
600 m
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.
▪ Finishing the outdoor installation.
