Daikin VRV 5 RXYA8A7Y1B Installer And User Manual page 99

Connection with VRV DX indoor units and air handling units (mix application) and connection
with only multiple air handling units (multi application)
a
H1
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P749918-1 – 2023.12
(c)
The limitation can be extended to 90 m if the following conditions are met:
• The piping length between all indoor units and the SV unit is ≤40 m.
• Size-up:
→ It is required to size-up both liquid and gas piping between the first branch kit or SV unit and the
last branch kit or last SV unit. The size-up pipe cannot be larger than Ø28.6 mm.
→ It is not required to size-up the piping between the SV unit and indoor units.
→ If the increased pipe size is larger than the pipe size of the main pipe, also increase the size of the
main pipe.
• In case of size-up of the piping, double its length in the calculation of the total piping length. Make
sure the total piping length is within limitations.
• The piping length difference between the nearest indoor unit to the outdoor unit and the farthest
indoor unit to the outdoor unit is ≤40 m.
H3
F
E
A
b
a Outdoor unit
b VRV DX indoor unit
c Safety valve unit (SV)
d VRV DX indoor unit (duct)
e VRV DX indoor unit (large duct)
f EKEXVA-kit
g Air handling unit (AHU)
Longest pipe from the outdoor unit or
the last multi-outdoor piping branch (A
+B1+C1, A+B2+C2, A+B1+C3, A+B1+D
+C4, A+F+G, A+B2+L)
Longest pipe after the first branch or SV
unit (B1+C1, B2+C2, B1+C3, B1+D+C4, F
+G, B2+L)
In case of a multi-outdoor setup:
longest pipe from the outdoor unit to
the last multi-outdoor piping branch (E)
B2
f
G
I
H4
g
b
c
D
B1
d
C1
C3
e
Pipe
18 Piping installation
|
c
L
C2
d
c
H2
C4
d
Maximum length (actual/equivalent)
165 m/190 m
135 m/160 m
40 m/—
10 m/13 m
Installer and user reference guide
(a)
(a)(b)
(c)
99