Daikin VRV system FXMQ200AXVMB, Инструкция по установке и эксплуатации

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17 | Piping installation
Installer and user reference guide
50
FXMQ-A
VRV system air conditioner
4P701548-1 – 2022.07
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
19.1 mm (3/4") 20~24 mm
22.2 mm (7/8") 23~27 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
INFORMATION
▪
For liquid piping , use a flare connection.
▪
For gas piping , use the attached piping (accessory) and fix it with the hexagon
head bolts and spring washers (accessory)
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