Daikin LREN8A7Y1B, Инструкция по установке и эксплуатации, Страница: 76 / 156

15 | Piping installation
Installer and user reference guide
76
LREN8~12A7 + LRNUN5A7
CO₂ ZEAS outdoor unit and capacity up unit
4P704142-1 – 2022.08
3 Indoor unit (showcase)
4 Indoor unit (blower coil)
A~J Liquid piping
a~g Gas piping
H1~H3 Height difference
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).
▪ Calculate the amount of refrigerant as described in "17.4 To determine the
refrigerant amount" [
4
119].
Piping size between outdoor unit and first branch
Model Piping outer diameter size (mm)
(a)
K65
Liquid side
(b)
Gas side
(b)
LREN8* Ø15.9×t1.05 Ø19.1×t1.30
LREN10* Ø15.9×t1.05 Ø19.1×t1.30
LREN12* Ø15.9×t1.05 Ø22.2×t1.50
(a)
For refrigeration piping (A, B, a, b).
(b)
For low load restrictions, see "13.5.1 Constraints for refrigeration" [ 4 54].
Piping size between branching areas or between first and second branch
Indoor unit
capacity index
(kW)
Piping outer
diameter size (mm)
Piping material
Liquid pipe for medium temperature and low temperature
(a)
x≤3.0 Ø6.4×t0.8 C1220T–O
3.0<x≤10.0 Ø9.5×t0.65 K65 and equivalent piping
10.0<x≤18.0 Ø12.7×t0.85 K65 and equivalent piping
18.0<x Ø15.9×t1.05 K65 and equivalent piping
Gas pipe for medium temperature
(a)
x≤6.5 Ø9.5×t0. 56 K65 and equivalent piping
6.5<x≤14.0 Ø12.7×t0.85 K65 and equivalent piping
14.0<x≤19.0 Ø15.9×t1.05 K65 and equivalent piping
19.0<x≤23.0 Ø19.1×t1.30 K65 and equivalent piping
23.0<x Ø22.2×t1.50 K65 and equivalent piping
Gas pipe for low temperature
(a)
x≤3.0 Ø9.5×t0.65 K65 and equivalent piping
3.0<x≤6.0 Ø12.7×t0.85 K65 and equivalent piping
6.0<x≤10.0 Ø15.9×t1.05 K65 and equivalent piping
10.0<x≤13.0 Ø19.1×t1.30 K65 and equivalent piping
13.0<x Ø22.2×t1.50 K65 and equivalent piping
(a)
Piping between branching areas (C, D, c, d)