Refrigerant Piping Insulation; Connecting The Refrigerant Piping; About Connecting The Refrigerant Piping - Daikin Altherma 3 R ECH2O 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
92
▪ Flare connections: Only use annealed material.
▪ Piping diameter:
Liquid piping
Gas piping
▪ Piping temper grade and thickness:
Outer diameter (Ø)
9.5 mm (3/8")
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
9.5 mm (3/8")
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.
NOTICE
Vibration. To prevent vibration of the refrigerant piping during operation, fixate the
piping between the outdoor and indoor unit.
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
▪ Connecting the refrigerant piping to the indoor unit
Ø9.5 mm (3/8")
Ø15.9 mm (5/8")
Temper grade
Annealed (O) ≥0.8 mm
Annealed (O) ≥1.0 mm
) Insulation inner diameter
p
(Ø )
i
12~15 mm
17~20 mm
(a)
Thickness (t)
Insulation thickness (t)
≥13 mm
≥13 mm
ERLA11~16DAV3+W1 + EBSH/X(B)11+16P30+50DF
Daikin Altherma 3 R ECH₂O
4P663482-1A – 2021.11
Ø
t