About The Piping Length - Daikin VRV 5 REYA8A7Y1B Installer And User Manual

18.1.7 About the piping length

REMA5+REYA8~20A7Y1B
VRV 5 heat recovery
4P687640-1 – 2022.07
Description
Maximum number of connectable
indoor units per BS unit (a)
Maximum number of connectable
indoor units per BS unit branch (b)
Maximum capacity index of
connectable indoor units per BS unit
(a)
Maximum capacity index of
connectable indoor units per branch
(b)
Maximum capacity index of
connectable indoor units per branch
if 2 branches are combined (e)
Maximum capacity index of indoor
units connected to BS units in
refrigerant flow-through (c)
Maximum number of ports of BS
units in refrigerant flow-through (c)
Maximum number of indoor units
connected to BS units in refrigerant
flow-through (c)
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
Actual piping length
Equivalent piping length
Total actual piping length
Equivalent length of the piping accessories
Accessory
Refnet joint
Refnet header
BS unit branch pipe
18 Piping installation
|
Model
BS4A BS6A BS8A
20 30 40
5
400 600
140
250
750
16
64
Definition
Pipe length between outdoor and
indoor units
Pipe length between outdoor and
indoor units, including the equivalent
length of the piping accessories
Total piping length, from the outdoor to
all indoor units
Equivalent length [m]
0.5 m
1 m
6.7 m
Installer and user reference guide
BS10A BS12A
50 60
750
85