Handleiding
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13 Piping installation
Installation and operation manual
23
LREN8~12A + LRNUN5A
CO₂ ZEAS outdoor unit and capacity up unit
4P704141-1F – 2024.12
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 changeover from inch to mm
pipes (field supply).
▪ Calculate the amount of refrigerant as described in "15.2 To
determine the refrigerant amount"[439].
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 'Constraints for refrigeration' in the
Installer and user reference guide.
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)
Piping size from branch to indoor unit
Liquid and gas piping: outer diameter size
(a)
Same size as C, D, c, d.
If piping sizes of the indoor units are different, connect a reducer
close to the indoor unit to align piping sizes.
(a)
Piping from branch to indoor unit (C, D, E; c; d; e)
Piping size of spun pipes with stop valves
Liquid side
(a)
Gas side
(a)
Ø15.9×t2.0 Ø22.2×t2.1
(a)
Reducers (field supply) may be required to connect the piping.
Piping size of spun pipes for safety valves
Piping type Size (mm)
Liquid side Ø19.1×t2.0
13.1.5 To select refrigerant branch kits
Always use K65 T-joints with a suitable design pressure for
refrigerant branching.
13.1.6 To select expansion valves for
refrigeration
The system controls liquid temperature and liquid pressure. Select
the expansion valves as indicated according to nominal conditions
and design pressure.
Nominal conditions
The following nominal conditions are valid for the liquid piping at the
outlet of the outdoor unit. They are based on an ambient
temperature of 32°C and an evaporate temperature of –10°C or –
35°C.
Evaporate temperature
–10°C –35°C
If showcases or blower coils are connected directly
Liquid temperature 25°C 12°C
Liquid pressure 6.8MPa 6.8MPa
Refrigerant condition Subcooled liquid
If capacity up unit is connected between outdoor unit and
showcases or blower coils
Liquid temperature (at outlet of
capacity up unit)
15°C 4°C
Liquid pressure (at outlet of
capacity up unit)
6.8MPa 6.8MPa
Refrigerant condition (at outlet of
capacity up unit)
Subcooled liquid
Design pressure
Make sure all parts comply to the following design pressure:
2
AA
A
B
1
3
4
A
B B
A Liquid piping (refrigeration side): 90bar gauge
B Gas piping (refrigeration side): depends on design
pressure of showcase and blower coil. For example,
60bar gauge
1 Capacity up unit (LRNUN5*)
2 Outdoor unit (LREN* )
3 Indoor unit (showcase)
4 Indoor unit (blower coil)
Bekijk gratis de handleiding van Daikin LRNUN5AY1, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Daikin |
| Model | LRNUN5AY1 |
| Categorie | Koelkast |
| Taal | Nederlands |
| Grootte | 8986 MB |
