Daikin 4MXM80A2V1B9 User Manual

7 | Piping installation
Installer reference guide
32
2MXM-A9, 3MXM-A9, 4MXM-A9, 5MXM-A9
R32 Split series
4P600463-7G – 2022.09
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
7.1.3 Refrigerant piping length and height difference ................................................................................................... 34
7.2 Connecting the refrigerant piping.......................................................................................................................................... 35
7.2.1 About connecting the refrigerant piping............................................................................................................... 35
7.2.2 Precautions when connecting the refrigerant piping............................................................................................ 35
7.2.3 Guidelines when connecting the refrigerant piping.............................................................................................. 36
7.2.4 Pipe bending guidelines ......................................................................................................................................... 37
7.2.5 To flare the pipe end.............................................................................................................................................. 37
7.2.6 Connections between outdoor and indoor unit using reducers........................................................................... 38
7.2.7 Using the stop valve and service port.................................................................................................................... 39
7.2.8 To connect the refrigerant piping to the outdoor unit ......................................................................................... 41
7.3 Checking the refrigerant piping.............................................................................................................................................. 41
7.3.1 About checking the refrigerant piping................................................................................................................... 41
7.3.2 Precautions when checking the refrigerant piping ............................................................................................... 42
7.3.3 To check for leaks................................................................................................................................................... 42
7.3.4 To perform vacuum drying .................................................................................................................................... 43
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 "2 General safety
precautions"[47].
▪ Foreign materials inside pipes (including oils for fabrication) must be
≤30mg/10m.
Refrigerant piping diameter
2MXM68
Liquid piping 2× Ø6.4mm (1/4")
Gas piping 1× Ø9.5mm (3/8")
1× Ø12.7mm (1/2")
3MXM40, 3MXM52, 3MXM68
Liquid piping 3× Ø6.4mm (1/4")
Gas piping 1× Ø9.5mm (3/8")
2× Ø12.7mm (1/2")

Daikin 4MXM80A2V1B9 Specifications

General

Brand	Daikin
Model	4MXM80A2V1B9
Category	Air Conditioner
Language	English