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Piping installation
Installer reference guide
32
3AMXF-A9, 3AMXF-A9, 3AMXM-N9
R32 Split series
4P600463-1F – 2022.05
7 Piping installation
In this chapter
7.1 Preparing refrigerant piping
7.1.1 Refrigerant piping requirements
CAUTION
Piping and joints of a split system shall be made with permanent joints when inside
an occupied space except joints directly connecting the piping to the indoor units.
NOTICE
The piping and other pressure-containing parts shall be suitable for refrigerant. Use
phosphoric acid deoxidised seamless copper for refrigerant piping.
INFORMATION
Also read the precautions and requirements in the
▪
Foreign materials inside pipes (including oils for fabrication) must be
≤30 mg/10 m.
Refrigerant piping diameter
Liquid piping
Gas piping
3× Ø6.4 mm (1/4")
1× Ø9.5 mm (3/8")
2× Ø12.7 mm (1/2")
INFORMATION
Usage of reducers might be required based on the indoor unit. See
"7.2.6 Connections between outdoor and indoor unit using reducers"
37] for
more information.