Refrigerant Piping Insulation; Connecting The Refrigerant Piping; About Connecting The Refrigerant Piping; Precautions When Connecting The Refrigerant Piping - Daikin FTXP25N5V1B9 Installer's Reference Manual

7 | Piping installation

7.1.2 Refrigerant piping insulation

7.2 Connecting the refrigerant piping

7.2.1 About connecting the refrigerant piping

7.2.2 Precautions when connecting the refrigerant piping

Installer reference guide
34
▪ 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")
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 indoor unit
▪ Connecting the refrigerant piping to the outdoor unit
▪ Insulating the refrigerant piping
▪ Keeping in mind the guidelines for:
- Pipe bending
- Flaring pipe ends
- Using the stop valves
DANGER: RISK OF BURNING/SCALDING
NOTICE
▪
Use the flare nut fixed to the unit.
▪
To prevent gas leakage, apply refrigeration oil ONLY to the inside of the flare. Use
refrigeration oil for R32 (FW68DA).
▪
Do NOT reuse joints.
) Insulation inner diameter
p
(Ø )
i
8~10 mm
Insulation thickness (t)
≥10 mm
FTXP20~35N5V1B9 + ATXP20~35N5V1B9
Split system air conditioners
4P751614-1 – 2023.08