Piping Installation; Preparing Refrigerant Piping; Refrigerant Piping Requirements - Daikin FDA125A5VEB Manual

17 Piping installation

In this chapter

17.1 Preparing refrigerant piping

17.1.1 Refrigerant piping requirements

Refrigerant piping diameter
Refrigerant piping material
FDA125A5VEB
Split system air conditioners
4P495031-1B – 2022.10
17.1 Preparing refrigerant piping ...................................................................................................................................................
17.1.1 Refrigerant piping requirements ...........................................................................................................................
17.1.2 Refrigerant piping insulation..................................................................................................................................
17.2 Connecting the refrigerant piping..........................................................................................................................................
17.2.1 About connecting the refrigerant piping...............................................................................................................
17.2.2 Precautions when connecting the refrigerant piping............................................................................................
17.2.3 Guidelines when connecting the refrigerant piping..............................................................................................
17.2.4 Pipe bending guidelines .........................................................................................................................................
17.2.5 To flare the pipe end..............................................................................................................................................
17.2.6 To connect the refrigerant piping to the indoor unit............................................................................................
CAUTION
Piping MUST be installed according to instructions given in
installation" [ 4
compliant with the latest version of ISO14903 can be used.
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
4
precautions" [
▪ Foreign materials inside pipes (including oils for fabrication) must be
≤30 mg/10 m.
For piping connections of the indoor unit, use the following piping diameters:
Liquid pipe
Ø9.5
▪ Piping material: phosphoric acid deoxidised seamless copper
▪ Flare connections: Only use annealed material.
▪ Piping temper grade and thickness:
Outer diameter (Ø)
9.5 mm (3/8") Annealed (O)
15.9 mm (5/8") Annealed (O)
(a)
Depending on the applicable legislation and the maximum working pressure of the unit
(see "PS High" on the unit name plate), larger piping thickness might be required.
59]. Only mechanical joints (e.g. braze+flare connections) that are
7].
Pipe outer diameter (mm)
Temper grade
≥0.8 mm
17 Piping installation
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"17 Piping
"2 General safety
Gas pipe
Ø15.9
(a)
Thickness (t)
Installer and user reference guide
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Ø
t
59