Daikin RXF42C5V1B handleiding

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Daikin

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Handleiding

7 | Piping installation

Installer reference guide

(A)RXF20~42C5V1B

R32 split series

4P519439-10J – 2021.06

7 Piping installation

In this chapter

7.1 Preparing refrigerant piping................................................................................................................................................... 30

7.1.1 Refrigerant piping requirements ........................................................................................................................... 30

7.1.2 Refrigerant piping length and height difference ................................................................................................... 30

7.1.3 Refrigerant piping insulation.................................................................................................................................. 31

7.2 Connecting the refrigerant piping.......................................................................................................................................... 31

7.2.1 About connecting the refrigerant piping............................................................................................................... 31

7.2.2 Precautions when connecting the refrigerant piping............................................................................................ 31

7.2.3 Guidelines when connecting the refrigerant piping.............................................................................................. 33

7.2.4 Pipe bending guidelines ......................................................................................................................................... 33

7.2.5 To flare the pipe end.............................................................................................................................................. 33

7.2.6 Using the stop valve and service port.................................................................................................................... 34

7.2.7 To connect the refrigerant piping to the outdoor unit ......................................................................................... 36

7.3 Checking the refrigerant piping.............................................................................................................................................. 36

7.3.1 About checking the refrigerant piping................................................................................................................... 36

7.3.2 Precautions when checking the refrigerant piping ............................................................................................... 37

7.3.3 To check for leaks................................................................................................................................................... 37

7.3.4 To perform vacuum drying .................................................................................................................................... 37

7.4 Charging refrigerant ............................................................................................................................................................... 39

7.4.1 About charging refrigerant .................................................................................................................................... 39

7.4.2 About the refrigerant ............................................................................................................................................. 40

7.4.3 To determine the additional refrigerant amount.................................................................................................. 40

7.4.4 To determine the complete recharge amount...................................................................................................... 41

7.4.5 To charge additional refrigerant............................................................................................................................ 41

7.4.6 To fix the fluorinated greenhouse gases label....................................................................................................... 41

7.1 Preparing refrigerant piping

7.1.1 Refrigerant piping requirements

INFORMATION

Also read the precautions and requirements in the "2 General safety

precautions"[46].

▪ Piping material: Phosphoric acid deoxidised seamless copper.

▪ Piping diameter:

Liquid piping Ø6.4mm (1/4")

Gas piping Ø9.5mm (3/8")

▪ Piping temper grade and thickness:

Outer diameter (Ø) Temper grade Thickness (t)

(a)

6.4mm (1/4") Annealed (O) ≥0.8mm

9.5mm (3/8") 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.

7.1.2 Refrigerant piping length and height difference

What? Distance

Maximum allowable pipe length 20m

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