Daikin FNA25A2VEB How to use

Installer reference guide
Split system air conditioners
FNA25A2VEB
FNA35A2VEB
FNA50A2VEB
FNA60A2VEB
FNA25A2VEB9
FNA35A2VEB9
FNA50A2VEB9
FNA60A2VEB9

Table of contents
Installer reference guide
2
FNA25~60A2VEB(9)
Split system air conditioners
4P550955-3C – 2020.12
Table of contents
1 General safety precautions 4
1.1 About the documentation .............................................................................................................................................. 4
1.1.1 Meaning of warnings and symbols ................................................................................................................ 4
1.2 For the installer............................................................................................................................................................... 5
1.2.1 General ........................................................................................................................................................... 5
1.2.2 Installation site ............................................................................................................................................... 6
1.2.3 Refrigerant — in case of R410A or R32.......................................................................................................... 9
1.2.4 Electrical ......................................................................................................................................................... 11
2 About the documentation 14
2.1 About this document ...................................................................................................................................................... 14
2.2 Installer reference guide at a glance .............................................................................................................................. 14
3 About the box 16
3.1 Overview: About the box ................................................................................................................................................ 16
3.2 Indoor unit ...................................................................................................................................................................... 16
3.2.1 To unpack and handle the unit ...................................................................................................................... 16
3.2.2 To remove the accessories from the indoor unit .......................................................................................... 16
4 About the units and options 18
4.1 Overview: About the units and options.......................................................................................................................... 18
4.2 System layout.................................................................................................................................................................. 18
4.3 Combining units and options.......................................................................................................................................... 19
4.3.1 Possible options for the indoor unit............................................................................................................... 19
5 Preparation 20
5.1 Overview: Preparation.................................................................................................................................................... 20
5.2 Preparing the installation site......................................................................................................................................... 20
5.2.1 Installation site requirements of the indoor unit .......................................................................................... 20
5.3 Preparing refrigerant piping ........................................................................................................................................... 22
5.3.1 Refrigerant piping requirements.................................................................................................................... 22
5.3.2 Refrigerant piping insulation.......................................................................................................................... 23
5.4 Preparing electrical wiring .............................................................................................................................................. 23
5.4.1 About preparing electrical wiring................................................................................................................... 23
6 Installation 25
6.1 Overview: Installation ..................................................................................................................................................... 25
6.2 Mounting the indoor unit ............................................................................................................................................... 25
6.2.1 Precautions when mounting the indoor unit................................................................................................. 25
6.2.2 Guidelines when installing the indoor unit.................................................................................................... 25
6.2.3 Guidelines when installing the ducting.......................................................................................................... 30
6.2.4 Guidelines when installing the drain piping................................................................................................... 32
6.3 Connecting the refrigerant piping .................................................................................................................................. 34
6.3.1 About connecting the refrigerant piping ....................................................................................................... 34
6.3.2 Precautions when connecting the refrigerant piping.................................................................................... 34
6.3.3 Guidelines when connecting the refrigerant piping...................................................................................... 35
6.3.4 Pipe bending guidelines ................................................................................................................................. 36
6.3.5 To flare the pipe end ...................................................................................................................................... 36
6.3.6 To connect the refrigerant piping to the indoor unit .................................................................................... 37
6.3.7 To check for leaks ........................................................................................................................................... 37
6.4 Connecting the electrical wiring..................................................................................................................................... 38
6.4.1 About connecting the electrical wiring.......................................................................................................... 38
6.4.2 Precautions when connecting the electrical wiring....................................................................................... 38
6.4.3 Guidelines when connecting the electrical wiring......................................................................................... 39
6.4.4 Specifications of standard wiring components.............................................................................................. 40
6.4.5 To connect the electrical wiring to the indoor unit....................................................................................... 40
7 Commissioning 42
7.1 Overview: Commissioning .............................................................................................................................................. 42
7.2 Checklist before commissioning..................................................................................................................................... 42
7.3 To perform a test run...................................................................................................................................................... 42
7.4 Error codes when performing a test run........................................................................................................................ 44
8 Hand-over to the user 45
9 Disposal 46

Table of contents
Installer reference guide
3
FNA25~60A2VEB(9)
Split system air conditioners
4P550955-3C – 2020.12
10 Technical data 47
10.1 Wiring diagram................................................................................................................................................................ 47
10.1.1 Unified wiring diagram legend ....................................................................................................................... 47
11 Glossary 50

1 | General safety precautions
Installer reference guide
4
FNA25~60A2VEB(9)
Split system air conditioners
4P550955-3C – 2020.12
1 General safety precautions
1.1 About the documentation
▪The original documentation is written in English. All other languages are
translations.
▪The precautions described in this document cover very important topics, follow
them carefully.
▪The installation of the system, and all activities described in the installation
manual and in the installer reference guide MUST be performed by an authorised
installer.
1.1.1 Meaning of warnings and symbols
DANGER
Indicates a situation that results in death or serious injury.
DANGER: RISK OF ELECTROCUTION
Indicates a situation that could result in electrocution.
DANGER: RISK OF BURNING/SCALDING
Indicates a situation that could result in burning/scalding because of extreme hot or
cold temperatures.
DANGER: RISK OF EXPLOSION
Indicates a situation that could result in explosion.
WARNING
Indicates a situation that could result in death or serious injury.
WARNING: FLAMMABLE MATERIAL
CAUTION
Indicates a situation that could result in minor or moderate injury.
NOTICE
Indicates a situation that could result in equipment or property damage.
INFORMATION
Indicates useful tips or additional information.
Symbols used on the unit:

1 | General safety precautions
Installer reference guide
5
FNA25~60A2VEB(9)
Split system air conditioners
4P550955-3C – 2020.12
Symbol Explanation
Before installation, read the installation and operation
manual, and the wiring instruction sheet.
Before performing maintenance and service tasks, read the
service manual.
For more information, see the installer and user reference
guide.
The unit contains rotating parts. Be careful when servicing or
inspecting the unit.
Symbols used in the documentation:
Symbol Explanation
Indicates a figure title or a reference to it.
Example: " 1–3 Figure title" means "Figure 3 in chapter 1".
Indicates a table title or a reference to it.
Example: " 1–3 Table title" means "Table 3 in chapter 1".
1.2 For the installer
1.2.1 General
If you are NOT sure how to install or operate the unit, contact your dealer.
DANGER: RISK OF BURNING/SCALDING
▪Do NOT touch the refrigerant piping, water piping or internal parts during and
immediately after operation. It could be too hot or too cold. Give it time to return
to normal temperature. If you must touch it, wear protective gloves.
▪Do NOT touch any accidental leaking refrigerant.
WARNING
Improper installation or attachment of equipment or accessories could result in
electrical shock, short-circuit, leaks, fire or other damage to the equipment. Only use
accessories, optional equipment and spare parts made or approved by Daikin.
WARNING
Make sure installation, testing and applied materials comply with applicable
legislation (on top of the instructions described in the Daikin documentation).
CAUTION
Wear adequate personal protective equipment (protective gloves, safety glasses,…)
when installing, maintaining or servicing the system.
WARNING
Tear apart and throw away plastic packaging bags so that nobody, especially
children, can play with them. Possible risk: suffocation.