Daikin VRV IV+ Installer And User Reference Manual page 73

REYQ8~20+REMQ5U7Y1B
VRV IV+ heat recovery
4P561154-1A – 2020.10
Indoor unit capacity index
63~140
200
250
▪ If a size-up of the piping is required, refer to the table below.
a
b
a Outdoor unit
b Main pipes (increase size)
c First refrigerant branch kit
d Piping between refrigerant branch kit and indoor unit
e Indoor unit
HP class
5~8
10
12+14
16
18~22
24
26~34
36~54
▪ The pipe thickness of the refrigerant piping shall comply with the applicable
legislation. The minimal pipe thickness for R410A piping must be in accordance
with the table below.
Pipe Ø (mm)
6.4/9.5/12.7
15.9
19.1/22.2
28.6
34.9
41.3
▪ In case the required pipe sizes (inch sizes) are not available, it is also allowed to
use other diameters (mm sizes), taken the following into account:
- Select the pipe size nearest to the required size.
- Use the suitable adapters for the change-over from inch to mm pipes (field
supply).
- The additional refrigerant calculation has to be adjusted as mentioned in
determine the additional refrigerant
Piping outer diameter size (mm)
Gas pipe
15.9
19.1
22.2
e
d
c
Size up
Liquid piping outer diameter size (mm)
12.7 → 15.9
15.9 → 19.1
19.1 → 22.2
Minimal thickness t (mm)
amount" [
18 Piping installation
|
Liquid pipe
9.5
9.5 → 12.7
0.80
0.99
0.80
0.99
1.21
1.43
4
98].
Installer and user reference guide
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