Daikin VRV 5 RXYA8A7Y1B, Installer And User Manual

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18 | Piping installation
Installer and user reference guide
96
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P749918-1 – 2023.12
Description Model
SV1 SV4 SV6 SV8
Maximum number of indoor units connected to SV units
in refrigerant flow-through (
c )
64
18.1.7 About the piping length
Make sure the piping installation does not exceed the maximum allowable pipe
length, the allowable level difference, and the allowable length after branching. To
illustrate the piping length requirements, 2 cases are discussed in the chapters
below. They describe both standard and non-standard outdoor unit combinations
with VRV DX indoor units.
Definitions
Term Definition
Actual piping length Pipe length between outdoor and
indoor units
Equivalent piping length Pipe length between outdoor and
indoor units, including the equivalent
length of the piping accessories
Total actual piping length Total piping length, from the outdoor to
all indoor units
Equivalent length of the piping accessories
Accessory Equivalent length [m]
Refnet joint 0.5 m
Refnet header 1 m
SV unit branch pipe 6.7 m
Total downstream
indoor unit capacity
Equivalent length of SV unit [m]
SV1A SV4A SV6A SV8A
<150 0.15 0.15 0.21 0.21
150≤x<290 0.4 0.4 0.58 0.58
290≤x<392 0.87 0.87 1.27 1.27
392≤x<620 3.42 3.42 4.99 4.99
620≤x≤650 3.42 3.42 4.99 4.99
Example
SV1 SV2
a
c
b b
50 50 50 50 50 50 50 50
b b d d d d
SV1 SV unit 1 (SV4A)
SV2 SV unit 2 (SV4A)
a 20 m
b 10 m