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Piping installation
Installer reference guide
35
ARXM50-71+RXM42~7 RXP50~7 RXA42+5
RXF50+6 RXF7 RXJ5 ARXF50~71A2V1B
R32 split series
4P513661-9J – 2020.05
7 Piping installation
In this chapter
7.1 Preparing refrigerant piping
7.1.1 Refrigerant piping requirements
INFORMATION
Also read the precautions and requirements in the
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")
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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.