Daikin FDA125A5VEB - Refrigerant Piping Insulation; Connecting the Refrigerant Piping; About Connecting the Refrigerant Piping; Precautions When Connecting the Refrigerant Piping

17 | Piping installation
Installer and user reference guide
60
FDA125A5VEB
Split system air conditioners
4P495031-1B – 2022.10
17.1.2 Refrigerant piping insulation
▪ 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
p
) Insulation inner diameter
(Ø
i
)
Insulation thickness (t)
9.5mm (3/8") 10~14mm ≥13mm
15.9mm (5/8") 16~20mm ≥13mm
Ø
i
Ø
i
t
Ø
p
Ø
p
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.
17.2 Connecting the refrigerant piping
17.2.1 About connecting the refrigerant piping
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
17.2.2 Precautions when connecting the refrigerant piping
INFORMATION
Also read the precautions and requirements in the following chapters:
▪ "2General safety precautions"[47]
▪ "17.1Preparing refrigerant piping"[459]
DANGER: RISK OF BURNING/SCALDING