Daikin RXTP25N2V1B8 User Manual

7 | Piping installation
Installer reference guide
33
RXTM30+40N2V1B + RXTP25+35N2V1B9 + RXTP25+35N2V1B8 +
ARXTP25+35N2V1B + RXTA30N2V1B
R32 split series
4P518023-7H – 2020.08
7 Piping installation
In this chapter
7.1 Preparing refrigerant piping................................................................................................................................................... 33
7.1.1 Refrigerant piping requirements ........................................................................................................................... 33
7.1.2 Refrigerant piping insulation.................................................................................................................................. 33
7.1.3 Refrigerant piping length and height difference ................................................................................................... 34
7.2 Connecting the refrigerant piping.......................................................................................................................................... 34
7.2.1 About connecting the refrigerant piping............................................................................................................... 34
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 ......................................................................................................................................... 36
7.2.5 To flare the pipe end.............................................................................................................................................. 37
7.2.6 Using the stop valve and service port.................................................................................................................... 37
7.2.7 To connect the refrigerant piping to the outdoor unit ......................................................................................... 39
7.3 Checking the refrigerant piping.............................................................................................................................................. 39
7.3.1 About checking the refrigerant piping................................................................................................................... 39
7.3.2 Precautions when checking the refrigerant piping ............................................................................................... 40
7.3.3 To check for leaks................................................................................................................................................... 40
7.3.4 To perform vacuum drying .................................................................................................................................... 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5].
▪ 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
t
Ø
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 insulation
▪ Use polyethylene foam as insulation material:
- with a heat transfer rate between 0.041 and 0.052 W/mK (0.035 and
0.045kcal/mh°C)
- with a heat resistance of at least 120°C
▪ Insulation thickness

Daikin RXTP25N2V1B8 Specifications

General

Brand	Daikin
Model	RXTP25N2V1B8
Category	Air Conditioner
Language	English