![background image](http://html.mh-extra.com/html/daikin/vrv-iv-s-rxysq4t8vb-series/vrv-iv-s-rxysq4t8vb-series_installer-and-user-reference-manual_2459213071.webp)
18
|
Piping installation
Installer and user reference guide
71
RXYSQ4~6T8V/YB
VRV IV-S system air conditioner
4P482277-1B – 2020.10
(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
18.2 Connecting the refrigerant piping
18.2.1 About connecting the refrigerant piping
Before connecting the refrigerant piping
Make sure the outdoor and indoor units are mounted.
Typical workflow
Connecting the refrigerant piping involves:
▪
Connecting the refrigerant piping to the outdoor unit
▪
Connecting refrigerant branch kits
▪
Connecting the refrigerant piping to the indoor units (see the installation manual
of the indoor units)
▪
Insulating the refrigerant piping
▪
Keeping in mind the guidelines for:
-
Pipe bending
-
Flaring pipe ends
-
Brazing
-
Using the stop valves