Daikin CTXM15R2V1B, Руководство по установке для специалистов

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7 | Piping installation
Installer reference guide
32
FTXM20~42+ATXM20~35R2/5V1B + FTXM50~7
ATXM50R2V1B
Daikin room air conditioner
4P518023-8G – 2020.06
7 Piping installation
In this chapter
7.1 Preparing refrigerant piping ................................................................................................................................................... 32
7.1.1 Refrigerant piping requirements ........................................................................................................................... 32
7.1.2 Refrigerant piping insulation.................................................................................................................................. 33
7.2 Connecting the refrigerant piping.......................................................................................................................................... 33
7.2.1 About connecting the refrigerant piping............................................................................................................... 33
7.2.2 Precautions when connecting the refrigerant piping............................................................................................ 34
7.2.3 Guidelines when connecting the refrigerant piping.............................................................................................. 35
7.2.4 Pipe bending guidelines ......................................................................................................................................... 35
7.2.5 To flare the pipe end.............................................................................................................................................. 35
7.2.6 To connect the refrigerant piping to the indoor unit............................................................................................ 36
7.1 Preparing refrigerant piping
7.1.1 Refrigerant piping requirements
INFORMATION
Also read the precautions and requirements in the "General safety precautions"
chapter.
NOTICE
The piping and other pressure-containing parts shall be suitable for refrigerant. Use
phosphoric acid deoxidised seamless copper for refrigerant.
▪ Foreign materials inside pipes (including oils for fabrication) must be
≤30 mg/10 m.
Refrigerant piping diameter
Use the same diameters as the connections on the outdoor units:
Class Pipe outer diameter (mm)
Liquid pipe Gas pipe
15~42 Ø6.4 Ø9.5
50~60 Ø6.4 Ø12.7
71 Ø6.4 Ø15.9
Refrigerant piping material
▪ Piping material: Phosphoric acid deoxidised seamless copper.
▪ Flare connections: Only use annealed material.
▪ Piping temper grade and thickness:
Outer diameter (Ø) Temper grade Thickness (t)
(a)
6.4 mm (1/4") Annealed (O) ≥0.8 mm
t
Ø
9.5 mm (3/8")
12.7 mm (1/2")
15.9 mm (5/8")