Daikin RXF71A2V1B User Manual

7 | Piping installation
Installer reference guide
35
ARXM50-71+RXM42~71R2V1B + RXP50~71M2V1B + RXA42+50B2V1B +
RXF50+60B2V1B + RXF71A2V1B + RXJ50N2V1B + ARXF50~71A2V1B
R32 split series
4P513661-9J – 2020.05
7 Piping installation
In this chapter
7.1 Preparing refrigerant piping................................................................................................................................................... 35
7.1.1 Refrigerant piping requirements ........................................................................................................................... 35
7.1.2 Refrigerant piping insulation.................................................................................................................................. 36
7.1.3 Refrigerant piping length and height difference ................................................................................................... 36
7.2 Connecting the refrigerant piping.......................................................................................................................................... 36
7.2.1 About connecting the refrigerant piping............................................................................................................... 37
7.2.2 Precautions when connecting the refrigerant piping............................................................................................ 37
7.2.3 Guidelines when connecting the refrigerant piping.............................................................................................. 38
7.2.4 Pipe bending guidelines ......................................................................................................................................... 39
7.2.5 To flare the pipe end.............................................................................................................................................. 39
7.2.6 Using the stop valve and service port.................................................................................................................... 40
7.2.7 To connect the refrigerant piping to the outdoor unit ......................................................................................... 41
7.3 Checking the refrigerant piping.............................................................................................................................................. 42
7.3.1 About checking the refrigerant piping................................................................................................................... 42
7.3.2 Precautions when checking the refrigerant piping ............................................................................................... 42
7.3.3 To check for leaks................................................................................................................................................... 43
7.3.4 To perform vacuum drying .................................................................................................................................... 43
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].
NOTICE
The piping and other pressure-containing parts shall be suitable for refrigerant. Use
phosphoric acid deoxidised seamless copper for refrigerant.
▪ Piping material: Phosphoric acid deoxidised seamless copper.
▪ Flare connections: Only use annealed material.
▪ Piping diameter:
Models Liquid piping Gas piping
RXM71R Ø6.4mm (1/4") Ø15.9 mm (5/8")
ARXM71R Ø9.5mm (3/8") Ø15.9 mm (5/8")
RXM42R Ø6.4mm (1/4") Ø9.5mm (3/8")
Other Ø6.4mm (1/4") Ø12.7mm (1/2")
▪ Piping temper grade and thickness:
Outer diameter (Ø) Temper grade Thickness (t)
(a)
6.4mm (1/4")
9.5mm (3/8")
12.7mm (1/2")
Annealed (O) ≥0.8mm
t
Ø
15.9mm (5/8") ≥1mm
(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.

Daikin RXF71A2V1B Specifications

General

Brand	Daikin
Model	RXF71A2V1B
Category	Air Conditioner
Language	English