Daikin CO2 Conveni-Pack, Инструкция для установки и пользователя

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16 | Piping installation
Installer and user reference guide
57
FXSN50~112A2VEB
CO₂ Conveni-Pack: indoor unit
4P602817-1A – 2020.05
16 Piping installation
In this chapter
16.1 Preparing refrigerant piping ................................................................................................................................................... 57
16.1.1 Refrigerant piping requirements ........................................................................................................................... 57
16.1.2 Refrigerant piping insulation.................................................................................................................................. 58
16.2 Connecting the refrigerant piping.......................................................................................................................................... 58
16.2.1 About connecting the refrigerant piping............................................................................................................... 58
16.2.2 Precautions when connecting the refrigerant piping............................................................................................ 58
16.2.3 Pipe bending guidelines ......................................................................................................................................... 59
16.2.4 Guidelines when connecting the refrigerant piping.............................................................................................. 59
16.2.5 To connect the refrigerant piping to the indoor unit............................................................................................ 60
16.1 Preparing refrigerant piping
16.1.1 Refrigerant piping requirements
INFORMATION
Also read the precautions and requirements in the "General safety precautions"
chapter.
NOTICE
The refrigerant R744 requires strict cautions for keeping the system clean, dry and
tight.
▪
Clean and dry: foreign materials (including mineral oils or moisture) should be
prevented from getting mixed into the system.
▪
Tight: R744 does not contain any chlorine, does not destroy the ozone layer, and
does not reduce earth's protection against harmful ultraviolet radiation. R744 can
contribute to the greenhouse effect if it is released. Therefore pay special
attention to check the tightness of the installation.
NOTICE
The piping and other pressure-containing parts shall be suitable for refrigerant. Use
K65 copper-iron alloy tube system for high-pressure applications with a working
pressure of 120 bar.
▪ Foreign materials inside pipes (including oils for fabrication) must be
≤30 mg/10 m.
Refrigerant piping diameter
Liquid piping Gas piping
Ø9.5 mm Ø12.7 mm
Refrigerant piping material
▪ Piping material: K65 copper-iron alloy (CuFe2P), maximum operating pressure =
120 bar
▪ Piping temper grade and thickness:
Outer diameter (Ø) Temper grade Thickness (t)
(a)
9.5 mm (3/8") R420
(drawn)
≥0.65 mm
t
Ø
12.7 mm (1/2") ≥0.85 mm