Daikin ARXF25F5V1B handleiding

Airco

Daikin

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Handleiding

7 | Piping installation

Installer reference guide

ARXF50F5V1B

R32 split series

4P769827-14D – 2024.08

7 Piping installation

In this chapter

7.1 Preparing refrigerant piping................................................................................................................................................... 36

7.1.1 Refrigerant piping requirements ........................................................................................................................... 36

7.1.2 Refrigerant piping insulation ................................................................................................................................. 37

7.1.3 Refrigerant piping length and height difference................................................................................................... 37

7.2 Connecting the refrigerant piping.......................................................................................................................................... 37

7.2.1 About connecting the refrigerant piping............................................................................................................... 38

7.2.2 Precautions when connecting the refrigerant piping ........................................................................................... 38

7.2.3 Guidelines when connecting the refrigerant piping ............................................................................................. 39

7.2.4 Pipe bending guidelines ......................................................................................................................................... 40

7.2.5 To flare the pipe end.............................................................................................................................................. 40

7.2.6 Using the stop valve and service port.................................................................................................................... 41

7.2.7 To connect the refrigerant piping to the outdoor unit ......................................................................................... 42

7.3 Checking the refrigerant piping.............................................................................................................................................. 43

7.3.1 About checking the refrigerant piping................................................................................................................... 43

7.3.2 Precautions when checking the refrigerant piping ............................................................................................... 43

7.3.3 To check for leaks................................................................................................................................................... 44

7.3.4 To perform vacuum drying .................................................................................................................................... 44

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

Use the same diameters as the connections on the outdoor units:

Pipe outer diameter

Liquid piping Gas piping

Ø6.4mm (1/4") Ø12.7mm (1/2")

Refrigerant piping material

▪ Piping material: phosphoric acid deoxidised seamless copper

▪ Flare connections: Only use annealed material.

▪ Piping temper grade and thickness:

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