Daikin VRV IV W+ Series Installer And User Reference Manual page 70

18 | Piping installation
Installer and user reference guide
70
Definitions
Term
Actual piping length
Equivalent piping length
Total piping length
(a) If the system is a multi outdoor installation, re-read "the first outdoor unit branch as
seen from the indoor unit".
Equivalent length of the piping accessories
Accessory
Refnet joint
Refnet header
Single BS1Q100~160
Single BS1Q25
Multi BS4~16Q14
Allowable height difference
Term
Actual piping length
Equivalent piping
(b)
length
Total piping length
H1
H2
H3
H4
H5
H6
H7
(a) If the system capacity is a multi outdoor installation, re-read "the first outdoor
branch as seen from the indoor unit".
(b) The allowable height difference is 50 m in case the outdoor unit is positioned higher
than the indoor unit, and 40 m in case the outdoor unit is positioned lower than the
indoor unit.
Pipe length between outdoor
Pipe length between outdoor
including the equivalent length of the piping
accessories
Total piping length, from the outdoor to all indoor
units
Definition
Pipe length between outdoor
indoor units
Pipe length between outdoor
indoor units
Total piping length from the
(a)
outdoor to all indoor units
Height difference between outdoor
and indoor units
Height difference between indoor
units
Height difference between outdoor
units
Height difference between outdoor
unit and BP unit.
Height difference between BP units
Height difference between BP unit
and RA DX indoor unit
Height difference between EKEXV-
kits and AHU units
Definition
(a)
and indoor units
(a)
and indoor units,
Equivalent length
0.5 m
1 m
4 m
6 m
4 m
Distance
(a)
and 165 m
(a)
and 190 m
300 m
50/40 m
15 m
30 m
5 m
40 m
15 m
5 m
5 m
RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452191-1B – 2020.10
(b)
(c)