Daikin FVXM35A3V1B9 Installer's Reference Guide

7 | Piping installation
Installer reference guide
37
CVXM-A, FVXM-A, CVXM-A9, FVXM-A9, FVXTM-A
Split system air conditioners
4P625991-1F – 2022.09
7 Piping installation
In this chapter
7.1 Preparing refrigerant piping................................................................................................................................................... 37
7.1.1 Refrigerant piping requirements ........................................................................................................................... 37
7.1.2 Refrigerant piping insulation.................................................................................................................................. 38
7.2 Connecting the refrigerant piping.......................................................................................................................................... 38
7.2.1 About connecting the refrigerant piping............................................................................................................... 38
7.2.2 Precautions when connecting the refrigerant piping............................................................................................ 39
7.2.3 Guidelines when connecting the refrigerant piping.............................................................................................. 40
7.2.4 Pipe bending guidelines ......................................................................................................................................... 40
7.2.5 To flare the pipe end.............................................................................................................................................. 40
7.2.6 To connect the refrigerant piping to the indoor unit............................................................................................ 41
7.1 Preparing refrigerant piping
7.1.1 Refrigerant piping requirements
CAUTION
Piping and joints of a split system shall be made with permanent joints when inside
an occupied space except joints directly connecting the piping to the indoor units.
NOTICE
The piping and other pressure-containing parts shall be suitable for refrigerant. Use
phosphoric acid deoxidised seamless copper for refrigerant piping.
INFORMATION
Also read the precautions and requirements in the "2 General safety
precautions"[46].
INFORMATION
Additional refrigerant charge is NOT allowed in case of combination of the outdoor
unit 3MXM40 or 3MXM52 with the indoor units CVXM-A and/or FVXM-A. The total
piping length MUST be ≤30m. For CVXM-A9 and FVXM-A9 refer to "To determine the
minimum floor area"[424].
▪ 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
▪ Flare connections: Only use annealed material.

Daikin FVXM35A3V1B9 Specifications

General

Brand	Daikin
Model	FVXM35A3V1B9
Category	Air Conditioner
Language	English