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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
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")
Содержание CTXM15R2V1B
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