Refrigerant Piping Insulation; Connecting The Refrigerant Piping; About Connecting The Refrigerant Piping - Daikin Altherma 3 R F Installer's Reference Manual

8 | Piping installation

8.1.2 Refrigerant piping insulation

8.2 Connecting the refrigerant piping

8.2.1 About connecting the refrigerant piping

Installer reference guide
86
▪ Piping length: See "7.1.3 Installation site requirements of the indoor
▪ Piping material: Phosphoric acid deoxidised seamless copper.
▪ Piping connections: Only flare and brazed connections are allowed. The indoor
and outdoor units have flare connections. Connect both ends without brazing. If
brazing should be needed, take the guidelines in the installer reference guide
into account.
▪ Flare connections: Only use annealed material.
▪ Piping diameter:
Liquid piping
Gas piping
▪ Piping temper grade and thickness:
Outer diameter (Ø)
6.4 mm (1/4")
15.9 mm (5/8")
(a)
Depending on the applicable legislation and the maximum working pressure of the unit
(see "PS High" on the unit name plate), larger piping thickness might be required.
▪ Use polyethylene foam as insulation material:
- with a heat transfer rate between 0.041 and 0.052 W/mK (0.035 and
0.045 kcal/mh°C)
- with a heat resistance of at least 120°C
▪ Insulation thickness
Pipe outer diameter (Ø
6.4 mm (1/4")
15.9 mm (5/8")
Ø Ø
i i
Ø Ø
p p
t
If the temperature is higher than 30°C and the humidity is higher than RH 80%, the
thickness of the insulation materials should be at least 20 mm to prevent
condensation on the surface of the insulation.
Before connecting the refrigerant piping
Make sure the outdoor and indoor unit are mounted.
Typical workflow
Connecting the refrigerant piping involves:
▪ Connecting the refrigerant piping to the outdoor unit
Ø6.4 mm (1/4")
Ø15.9 mm (5/8")
Temper grade
Annealed (O) ≥0.8 mm
Annealed (O) ≥1.0 mm
) Insulation inner diameter
p
(Ø )
i
8~10 mm
16~20 mm
unit" [
(a)
Thickness (t)
Insulation thickness (t)
10 mm
13 mm
ERGA04~08EA + EHVH04+08SU18+23EA
Daikin Altherma 3 R F
4P629090-1A – 2021.11
4
66].
Ø
t