Daikin Perfera FVXM35A3V1B User Manual

7 | Piping installation
Installer reference guide
35
CVXM20A + FVXM25~50A
Split system air conditioners
4P625991-1C – 2021.09
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
7.2 Connecting the refrigerant piping.......................................................................................................................................... 36
7.2.1 About connecting the refrigerant piping............................................................................................................... 36
7.2.2 Precautions when connecting the refrigerant piping............................................................................................ 36
7.2.3 Guidelines when connecting the refrigerant piping.............................................................................................. 37
7.2.4 Pipe bending guidelines ......................................................................................................................................... 38
7.2.5 To flare the pipe end.............................................................................................................................................. 38
7.2.6 To connect the refrigerant piping to the indoor unit............................................................................................ 39
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.
INFORMATION
Additional refrigerant charge is NOT allowed in case of combination of the outdoor
unit 3MXM40N8 or 3MXM52N8 with the indoor units CVXM-A and/or FVXM-A. The
total piping length MUST be ≤30m.
▪ Foreign materials inside pipes (including oils for fabrication) must be
≤30mg/10m.
Refrigerant piping diameter
Use the same diameters as the connections on the outdoor units:
Class Pipe outer diameter (mm)
Liquid piping Gas piping
20~35 Ø6.4 Ø9.5
50 Ø6.4 Ø12.7
Refrigerant piping material
▪ Piping material: Phosphoric acid deoxidised seamless copper.
▪ 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")
12.7mm (1/2")

Daikin Perfera FVXM35A3V1B Specifications

General

Brand	Daikin
Model	Perfera FVXM35A3V1B
Category	Air Conditioner
Language	English