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Piping installation
Installer and user reference guide
74
RXYLQ10~14T7Y1B*
VRV IV system air conditioner
4P543427-1A – 2020.10
Equivalent length of the piping accessories
Accessory
Equivalent length
Refnet joint
0.5 m
Refnet header
1 m
18.1.6 Piping length: VRV DX only
For system only containing VRV DX indoor units:
System setup
Example
Description
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
Single outdoor
Branch with refnet joint
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
Single outdoor
Branch with refnet joint
and refnet header
Example 1.3
a
c
b
d
e
f
i
g
h
1
2
3
4
5
6
7
8
H1
H2
Single outdoor
Branch with refnet header
Example 2.1
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
t
u
r
s
H1
H2
Multi outdoor
Branch with refnet joint
Example 2.2
a
j
k
b
1
2
3
4
5
6
7 8
c
d
e
f
g
h
t
u
r
s
B
A
H1
H3
H2
Multi outdoor
Branch with refnet joint
and refnet header
