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Piping installation
Installer and user reference guide
72
RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452191-1B – 2020.10
Pipe
Maximum length (actual/
equivalent)
Longest pipe from the outdoor unit or the last multi-
outdoor piping branch (1+2+6, 1+3, 1+2+5)
165 m/190 m
(a)
Longest pipe after the first branch (3, 2+6, 2+5)
40 m/—
In case of a multi-outdoor setup: longest pipe from
the outdoor unit to the last multi-outdoor piping
branch (4)
10 m/13 m
Total pipe length (1+2+3+5+6)
300 m/—
(a) If the equivalent piping length is more than 90 m, size up the main liquid piping
according to
"18.1.3 To select the piping size"
.
Connection with VRV DX indoor units and Hydrobox units
a
4
H1
H2
H3
H2
H2
a
a
b
b
c
6
2
5
1
3
a
Outdoor unit
b
VRV DX indoor unit
c
Low temperature (LT) Hydrobox unit
Pipe
Maximum length (actual/
equivalent)
Longest pipe from the outdoor unit or the last multi-
outdoor piping branch (1+2+6, 1+3, 1+2+5)
120 m/140 m
Longest pipe after the first branch (3, 2+6, 2+5)
40 m/—
In case of a multi-outdoor setup: longest pipe from
the outdoor unit to the last multi-outdoor piping
branch (4)
10 m/13 m
Total pipe length (1+2+3+5+6)
300 m/—