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Piping installation
Installer and user reference guide
77
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1 – 2020.01
18 Piping installation
In this chapter
18.1 Preparing refrigerant piping
18.1.1 Refrigerant piping requirements
INFORMATION
Also read the precautions and requirements in the "General safety precautions"
chapter.
NOTICE
The piping and other pressure-containing parts shall be suitable for refrigerant. Use
phosphoric acid deoxidised seamless copper for refrigerant.
▪
Foreign materials inside pipes (including oils for fabrication) must be
≤30 mg/10 m.
18.1.2 Refrigerant piping material
▪
Piping material:
Phosphoric acid deoxidised seamless copper.
▪
Flare connections:
Only use annealed material.
▪
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)
≥0.80 mm
t
Ø
15.9 mm (5/8")
Annealed (O)
≥0.99 mm
19.1 mm (3/4")
Half hard (1/2H)
≥0.80 mm
Summary of Contents for VRV 5-S Series
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