Daikin VRV IV W+ Series Installer And User Reference Manual page 66

18 | Piping installation
A, B, C: Piping between outdoor unit and (first) refrigerant branch kit
D: Piping between refrigerant branch kits or refrigerant branch kit and BS unit
Installer and user reference guide
66
1,2 VRV DX indoor unit
3 Branch selector unit (BS*)
4 Cooling only VRV indoor unit
A~E Piping
a,b Indoor branch kit
x,y Outdoor multi connection kit
Choose from the following table in accordance with the outdoor unit total capacity
type, connected downstream.
In case of heat pump system
Outdoor unit capacity
type (HP)
8
10
12~16
18~22
24
26~34
36~42
In case of heat recovery system
Outdoor unit capacity
type (HP)
8
10
12
14~16
18
20~22
24
26~34
36
38~42
Choose from the following table in accordance with the indoor unit total capacity
type, connected downstream. Do not let the connection piping exceed the
refrigerant piping size chosen by the general system model name.
Piping outer diameter size (mm)
Gas pipe
19.1
22.2
28.6
34.9
41.3
Piping outer diameter size (mm)
Liquid pipe Suction gas pipe High pressure/
9.5 19.1
22.2
12.7 28.6
15.9
34.9
19.1
41.3
Liquid pipe
9.5
12.7
15.9
19.1
low pressure gas
pipe
15.9
19.1
22.2
28.6
34.9
RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452191-1B – 2020.10