Daikin EWSAH06D 9W Series How to use

Installer reference guide
Daikin Altherma 3 WS
EWSAH06D▲9W▼
EWSAX06D▲9W▼
▲= A, B, C, …, Z
▼= , , 1, 2, 3, …, 9

Table of contents
Installer reference guide
2
EWSAH/X06D
Daikin Altherma 3 WS
4P675764-1 – 2022.04
Table of contents
1 About this document 6
1.1 Meaning of warnings and symbols................................................................................................................................. 7
1.2 Installer reference guide at a glance .............................................................................................................................. 8
2 General safety precautions 10
2.1 For the installer............................................................................................................................................................... 10
2.1.1 General ........................................................................................................................................................... 10
2.1.2 Installation site ............................................................................................................................................... 11
2.1.3 Refrigerant — in case of R410A or R32.......................................................................................................... 11
2.1.4 Brine................................................................................................................................................................ 13
2.1.5 Water .............................................................................................................................................................. 13
2.1.6 Electrical ......................................................................................................................................................... 13
3 Specific installer safety instructions 16
4 About the box 21
4.1 Overview: About the box ................................................................................................................................................ 21
4.2 Indoor unit ...................................................................................................................................................................... 21
4.2.1 To unpack the indoor unit.............................................................................................................................. 21
4.2.2 To remove the accessories from the indoor unit .......................................................................................... 22
4.2.3 To handle the indoor unit............................................................................................................................... 22
5 About the units and options 23
5.1 Overview: About the units and options.......................................................................................................................... 23
5.2 Identification ................................................................................................................................................................... 23
5.2.1 Identification label: Indoor unit ..................................................................................................................... 23
5.3 Components.................................................................................................................................................................... 24
5.4 Possible options for the indoor unit............................................................................................................................... 26
6 Application guidelines 28
6.1 Overview: Application guidelines ................................................................................................................................... 28
6.2 Setting up the space heating/cooling system ................................................................................................................ 29
6.2.1 Single room..................................................................................................................................................... 29
6.2.2 Multiple rooms – OneLWT zone ................................................................................................................... 34
6.2.3 Multiple rooms – TwoLWT zones.................................................................................................................. 39
6.3 Setting up an auxiliary heat source for space heating ................................................................................................... 42
6.4 Setting up the domestic hot water tank......................................................................................................................... 44
6.4.1 System layout – Integrated DHW tank........................................................................................................... 44
6.4.2 Selecting the volume and desired temperature for the DHW tank .............................................................. 44
6.4.3 Setup and configuration – DHW tank ............................................................................................................ 46
6.4.4 DHW pump for instant hot water .................................................................................................................. 46
6.4.5 DHW pump for disinfection ........................................................................................................................... 47
6.5 Setting up the energy metering...................................................................................................................................... 47
6.5.1 Produced heat ................................................................................................................................................ 48
6.5.2 Consumed energy........................................................................................................................................... 48
6.6 Setting up the power consumption control ................................................................................................................... 51
6.6.1 Permanent power limitation.......................................................................................................................... 52
6.6.2 Power limitation activated by digital inputs .................................................................................................. 52
6.6.3 Power limitation process................................................................................................................................ 54
6.6.4 Current limitation by current sensors............................................................................................................ 54
6.6.5 BBR16 power limitation.................................................................................................................................. 55
6.7 Setting up an external temperature sensor ................................................................................................................... 56
6.8 Setting up passive cooling .............................................................................................................................................. 56
6.9 Setting up the brine low pressure switch....................................................................................................................... 57
7 Unit installation 59
7.1 Preparing the installation site......................................................................................................................................... 59
7.1.1 Installation site requirements of the indoor unit .......................................................................................... 59
7.2 Opening and closing the unit.......................................................................................................................................... 60
7.2.1 About opening the unit .................................................................................................................................. 60
7.2.2 To open the indoor unit ................................................................................................................................. 61
7.2.3 To remove the hydro module from the unit.................................................................................................. 64
7.2.4 To close the indoor unit ................................................................................................................................. 67
7.3 Mounting the indoor unit ............................................................................................................................................... 67
7.3.1 About mounting the indoor unit.................................................................................................................... 67
7.3.2 Precautions when mounting the indoor unit................................................................................................. 68

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7.3.3 To install the indoor unit ................................................................................................................................ 68
7.3.4 To connect the drain hose to the drain ......................................................................................................... 69
8 Piping installation 70
8.1 Preparing piping.............................................................................................................................................................. 70
8.1.1 Circuit requirements....................................................................................................................................... 70
8.1.2 Formula to calculate the expansion vessel pre-pressure.............................................................................. 73
8.1.3 To check the water volume and flow rate of the space heating circuit and the central water loop circuit 74
8.1.4 Changing the pre-pressure of the expansion vessel...................................................................................... 75
8.2 Connecting the central water loop piping...................................................................................................................... 75
8.2.1 About connecting the central water loop piping........................................................................................... 75
8.2.2 Precautions when connecting the central water loop piping ....................................................................... 75
8.2.3 To connect the central water loop piping...................................................................................................... 76
8.2.4 To fill the central water loop circuit............................................................................................................... 77
8.2.5 To insulate the central water loop piping...................................................................................................... 77
8.3 Connecting water piping................................................................................................................................................. 77
8.3.1 About connecting the water piping ............................................................................................................... 77
8.3.2 Precautions when connecting the water piping............................................................................................ 78
8.3.3 To connect the water piping .......................................................................................................................... 78
8.3.4 To connect the recirculation piping ............................................................................................................... 79
8.3.5 To fill the space heating circuit ...................................................................................................................... 79
8.3.6 To fill the domestic hot water tank................................................................................................................ 80
8.3.7 To check for water leaks................................................................................................................................. 80
8.3.8 To insulate the water piping .......................................................................................................................... 80
9 Electrical installation 81
9.1 About connecting the electrical wiring .......................................................................................................................... 81
9.1.1 Precautions when connecting the electrical wiring....................................................................................... 81
9.1.2 Guidelines when connecting the electrical wiring......................................................................................... 82
9.1.3 About electrical compliance........................................................................................................................... 83
9.1.4 Safety device requirements ........................................................................................................................... 84
9.2 Overview of electrical connections for external and internal actuators ....................................................................... 84
9.2.1 To connect the main power supply................................................................................................................ 86
9.2.2 To connect the remote outdoor sensor......................................................................................................... 92
9.2.3 To connect the shut-off valve ........................................................................................................................ 93
9.2.4 To connect the electricity meters .................................................................................................................. 94
9.2.5 To connect the domestic hot water pump .................................................................................................... 95
9.2.6 To connect the alarm output ......................................................................................................................... 96
9.2.7 To connect the space cooling/heating ON/OFF output................................................................................. 97
9.2.8 To connect the changeover to external heat source..................................................................................... 99
9.2.9 To connect the power consumption digital inputs........................................................................................ 100
9.2.10 To connect the safety thermostat (normally closed contact) ....................................................................... 101
9.2.11 To connect the brine low pressure switch..................................................................................................... 102
9.2.12 To connect the thermostat for passive cooling ............................................................................................. 104
10 LAN adapter 105
10.1 About the LAN adapter................................................................................................................................................... 105
10.1.1 System layout ................................................................................................................................................. 106
10.1.2 System requirements ..................................................................................................................................... 108
10.1.3 On-site installation requirements .................................................................................................................. 108
10.2 Connecting the electrical wiring..................................................................................................................................... 109
10.2.1 Overview of electrical connections ................................................................................................................ 109
10.2.2 Router ............................................................................................................................................................. 111
10.2.3 Electricity meter ............................................................................................................................................. 112
10.2.4 Solar inverter/energy management system .................................................................................................. 114
10.3 Starting up the system.................................................................................................................................................... 117
10.4 Configuration – LAN adapter.......................................................................................................................................... 117
10.4.1 Overview: Configuration ................................................................................................................................ 117
10.4.2 Configuring the adapter for app control........................................................................................................ 118
10.4.3 Configuring the adapter for the Smart Grid application ............................................................................... 118
10.4.4 Updating software .......................................................................................................................................... 118
10.4.5 Configuration web interface .......................................................................................................................... 119
10.4.6 System information ........................................................................................................................................ 120
10.4.7 Factory reset................................................................................................................................................... 121
10.4.8 Network settings ............................................................................................................................................ 122
10.5 Smart Grid application.................................................................................................................................................... 124
10.5.1 Smart Grid settings ......................................................................................................................................... 126
10.5.2 Operation modes............................................................................................................................................ 128
10.5.3 System requirements ..................................................................................................................................... 129
10.6 Troubleshooting – LAN adapter...................................................................................................................................... 130

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10.6.1 Overview: Troubleshooting ............................................................................................................................ 130
10.6.2 Solving problems based on symptoms – LAN adapter .................................................................................. 130
10.6.3 Solving problems based on error codes – LAN adapter ................................................................................ 131
11 Configuration 133
11.1 Overview: Configuration................................................................................................................................................. 133
11.1.1 To access the most used commands ............................................................................................................. 134
11.1.2 To connect the PC cable to the switch box.................................................................................................... 136
11.2 Configuration wizard....................................................................................................................................................... 136
11.3 Possible screens.............................................................................................................................................................. 138
11.3.1 Possible screens: Overview ............................................................................................................................ 138
11.3.2 Home screen................................................................................................................................................... 138
11.3.3 Main menu screen.......................................................................................................................................... 141
11.3.4 Menu screen................................................................................................................................................... 142
11.3.5 Setpoint screen............................................................................................................................................... 142
11.3.6 Detailed screen with values ........................................................................................................................... 143
11.3.7 Schedule screen: Example.............................................................................................................................. 143
11.4 Weather-dependent curve............................................................................................................................................. 147
11.4.1 What is a weather-dependent curve? ........................................................................................................... 147
11.4.2 2-points curve................................................................................................................................................. 148
11.4.3 Slope-offset curve........................................................................................................................................... 149
11.4.4 Using weather-dependent curves.................................................................................................................. 150
11.5 Settings menu ................................................................................................................................................................. 152
11.5.1 Malfunctioning ............................................................................................................................................... 152
11.5.2 Room............................................................................................................................................................... 153
11.5.3 Main zone ....................................................................................................................................................... 156
11.5.4 Additional zone............................................................................................................................................... 163
11.5.5 Space heating/cooling .................................................................................................................................... 168
11.5.6 Tank................................................................................................................................................................. 176
11.5.7 User settings ................................................................................................................................................... 184
11.5.8 Information..................................................................................................................................................... 187
11.5.9 Installer settings ............................................................................................................................................. 188
11.5.10 Operation........................................................................................................................................................ 205
11.6 Menu structure: Overview user settings........................................................................................................................ 206
11.7 Menu structure: Overview installer settings.................................................................................................................. 207
12 Commissioning 208
12.1 Overview: Commissioning .............................................................................................................................................. 208
12.2 Precautions when commissioning.................................................................................................................................. 209
12.3 Checklist before commissioning..................................................................................................................................... 209
12.4 Checklist during commissioning ..................................................................................................................................... 210
12.4.1 Air purge function on the water circuit ......................................................................................................... 210
12.4.2 Air purge on the central water loop circuit ................................................................................................... 212
12.4.3 To perform an operation test run .................................................................................................................. 212
12.4.4 To perform an actuator test run .................................................................................................................... 212
12.4.5 Underfloor heating screed dryout ................................................................................................................. 214
13 Hand-over to the user 218
14 Maintenance and service 219
14.1 Maintenance safety precautions.................................................................................................................................... 219
14.2 Yearly maintenance ........................................................................................................................................................ 219
14.2.1 Yearly maintenance: overview ....................................................................................................................... 219
14.2.2 Yearly maintenance: instructions................................................................................................................... 220
14.3 To drain the domestic hot water tank............................................................................................................................ 221
14.4 To remove and install the valve actuator of the central water loop............................................................................. 222
15 Troubleshooting 225
15.1 Overview: Troubleshooting ............................................................................................................................................ 225
15.2 Precautions when troubleshooting ................................................................................................................................ 225
15.3 Solving problems based on symptoms........................................................................................................................... 226
15.3.1 Symptom: The unit is NOT heating as expected............................................................................................ 226
15.3.2 Symptom: The compressor does NOT start (space heating or domestic water heating) ............................ 227
15.3.3 Symptom: The pump is making noise (cavitation)......................................................................................... 227
15.3.4 Symptom: The pressure relief valve opens.................................................................................................... 227
15.3.5 Symptom: The pressure relief valve leaks ..................................................................................................... 228
15.3.6 Symptom: The space is NOT sufficiently heated at low outdoor temperatures........................................... 229
15.3.7 Symptom: The pressure at the tapping point is temporarily unusually high................................................ 230
15.3.8 Symptom: Tank disinfection function is NOT completed correctly (AH-error)............................................. 230
15.4 Solving problems based on error codes......................................................................................................................... 230
15.4.1 To display the help text in case of a malfunction .......................................................................................... 230

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15.4.2 Error codes of the unit ................................................................................................................................... 231
16 Disposal 235
17 Technical data 236
17.1 Piping diagram: Indoor unit............................................................................................................................................ 236
17.2 Wiring diagram: Indoor unit ........................................................................................................................................... 238
17.3 ESP curve: Indoor unit..................................................................................................................................................... 245
18 Glossary 246
19 Field settings table 247

1 | About this document
Installer reference guide
6
EWSAH/X06D
Daikin Altherma 3 WS
4P675764-1 – 2022.04
1 About this document
Target audience
Authorised installers
Documentation set
This document is part of a documentation set. The complete set consists of:
▪General safety precautions:
-Safety instructions that you must read before installing
-Format: Paper (in the box of the unit)
▪Operation manual:
-Quick guide for basic usage
-Format: Paper (in the box of the unit)
▪User reference guide:
-Detailed step-by-step instructions and background information for basic and
advanced usage
-Format: Digital files on https://www.daikin.eu. Use the search function to
find your model.
▪Installation manual:
-Installation instructions
-Format: Paper (in the box of the unit)
▪Installer reference guide:
-Preparation of the installation, good practices, reference data,…
-Format: Digital files on https://www.daikin.eu. Use the search function to
find your model.
▪Addendum book for optional equipment:
-Additional info about how to install optional equipment
-Format: Paper (in the box of the unit) + Digital files on https://www.daikin.eu.
Use the search function to find your model.
Latest revisions of the supplied documentation may be available on the regional
Daikin website or via your dealer.
The original documentation is written in English. All other languages are
translations.
Technical engineering data
▪A subset of the latest technical data is available on the regional Daikin website
(publicly accessible).
▪The full set of latest technical data is available on the Daikin Business Portal
(authentication required).
Online tools
In addition to the documentation set, some online tools are available for installers:

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▪Heating Solutions Navigator
-Digital toolbox that offers a variety of tools to facilitate the installation and
configuration of heating systems.
-To access Heating Solutions Navigator, registration to the Stand By Me
platform is required. For more information, see https://
professional.standbyme.daikin.eu.
▪Daikin e-Care
-Mobile app for installers and service technicians that allows you to register,
configure and troubleshoot heating systems.
-The mobile app can be downloaded for iOS and Android devices using the QR
codes below. Registration to the Stand By Me platform is required to access
the app.
App Store Google Play
▪Engineering guide for collective housing
-Digital engineering toolbox which provides guidelines to define the central
water loop technical specifications. For more information see Engineering
guide at https://collectivehousing.daikin.eu.
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

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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:
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 Installer reference guide at a glance
Chapter Description
About this document What documentation exists for the installer
General safety precautions Safety instructions that you must read before
installing
Specific installer safety
instructions
About the box How to unpack the units and remove their
accessories
About the units and options ▪How to identify the units
▪Possible combinations of units and options
Application guidelines Various installation setups of the system
Unit installation What to do and know to install the system,
including information on how to prepare for an
installation

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Chapter Description
Piping installation What to do and know to install the piping of the
system, including information on how to
prepare for an installation
Electrical installation What to do and know to install the electrical
components of the system, including
information on how to prepare for an
installation
LAN adapter What to do and know to integrate the unit (with
integrated LAN adapter) into one of the
following applications:
▪App control (only)
▪Smart Grid application (only)
▪App control + Smart Grid application
Configuration What to do and know to configure the system
after it is installed
Commissioning What to do and know to commission the system
after it is configured
Hand‑over to the user What to give and explain to the user
Maintenance and service How to maintain and service the units
Troubleshooting What to do in case of problems
Disposal How to dispose of the system
Technical data Specifications of the system
Glossary Definition of terms
Field settings table Table to be filled in by the installer, and kept for
future reference
Note: There is also an installer settings table in
the user reference guide. This table has to be
filled in by the installer and handed over to the
user.

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2 General safety precautions
In this chapter
2.1 For the installer....................................................................................................................................................................... 10
2.1.1 General ................................................................................................................................................................... 10
2.1.2 Installation site ....................................................................................................................................................... 11
2.1.3 Refrigerant — in case of R410A or R32 ................................................................................................................. 11
2.1.4 Brine ....................................................................................................................................................................... 13
2.1.5 Water...................................................................................................................................................................... 13
2.1.6 Electrical ................................................................................................................................................................. 13
2.1 For the installer
2.1.1 General
If you are NOT sure how to install or operate the unit, contact your dealer.
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.
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
Provide adequate measures to prevent that the unit can be used as a shelter by small
animals. Small animals that make contact with electrical parts can cause
malfunctions, smoke or fire.
CAUTION
▪Do NOT place any objects or equipment on top of the unit.
▪Do NOT sit, climb or stand on the unit.

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In accordance with the applicable legislation, it might be necessary to provide a
logbook with the product containing at least: information on maintenance, repair
work, results of tests, stand-by periods,…
Also, at least, following information MUST be provided at an accessible place at the
product:
▪Instructions for shutting down the system in case of an emergency
▪Name and address of fire department, police and hospital
▪Name, address and day and night telephone numbers for obtaining service
In Europe, EN378 provides the necessary guidance for this logbook.
2.1.2 Installation site
▪Provide sufficient space around the unit for servicing and air circulation.
▪Make sure the installation site withstands the weight and vibration of the unit.
▪Make sure the area is well ventilated. Do NOT block any ventilation openings.
▪Make sure the unit is level.
Do NOT install the unit in the following places:
▪In potentially explosive atmospheres.
▪In places where there is machinery that emits electromagnetic waves.
Electromagnetic waves may disturb the control system, and cause malfunction of
the equipment.
▪In places where there is a risk of fire due to the leakage of flammable gases
(example: thinner or gasoline), carbon fibre, ignitable dust.
▪In places where corrosive gas (example: sulphurous acid gas) is produced.
Corrosion of copper pipes or soldered parts may cause the refrigerant to leak.
2.1.3 Refrigerant — in case of R410A or R32
If applicable. See the installation manual or installer reference guide of your
application for more information.
NOTICE
Make sure refrigerant piping installation complies with applicable legislation. In
Europe, EN378 is the applicable standard.
NOTICE
Make sure the field piping and connections are NOT subjected to stress.
WARNING
During tests, NEVER pressurise the product with a pressure higher than the
maximum allowable pressure (as indicated on the nameplate of the unit).
WARNING
Take sufficient precautions in case of refrigerant leakage. If refrigerant gas leaks,
ventilate the area immediately. Possible risks:
▪Excessive refrigerant concentrations in a closed room can lead to oxygen
deficiency.
▪Toxic gas might be produced if refrigerant gas comes into contact with fire.

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DANGER: RISK OF EXPLOSION
Pump down – Refrigerant leakage. If you want to pump down the system, and there
is a leak in the refrigerant circuit:
▪Do NOT use the unit's automatic pump down function, with which you can collect
all refrigerant from the system into the outdoor unit. Possible consequence: Self-
combustion and explosion of the compressor because of air going into the
operating compressor.
▪Use a separate recovery system so that the unit's compressor does NOT have to
operate.
WARNING
ALWAYS recover the refrigerant. Do NOT release them directly into the environment.
Use a vacuum pump to evacuate the installation.
NOTICE
After all the piping has been connected, make sure there is no gas leak. Use nitrogen
to perform a gas leak detection.
NOTICE
▪To avoid compressor breakdown, do NOT charge more than the specified amount
of refrigerant.
▪When the refrigerant system is to be opened, refrigerant MUST be treated
according to the applicable legislation.
WARNING
Make sure there is no oxygen in the system. Refrigerant may ONLY be charged after
performing the leak test and the vacuum drying.
Possible consequence: Self-combustion and explosion of the compressor because of
oxygen going into the operating compressor.
▪In case recharge is required, see the nameplate of the unit. It states the type of
refrigerant and necessary amount.
▪The unit is factory charged with refrigerant and depending on pipe sizes and pipe
lengths some systems require additional charging of refrigerant.
▪ONLY use tools exclusively for the refrigerant type used in the system, this to
ensure pressure resistance and prevent foreign materials from entering into the
system.
▪Charge the liquid refrigerant as follows:
If Then
A siphon tube is present
(i.e., the cylinder is marked with "Liquid
filling siphon attached")
Charge with the cylinder upright.
A siphon tube is NOT present Charge with the cylinder upside down.
▪Open refrigerant cylinders slowly.

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▪Charge the refrigerant in liquid form. Adding it in gas form may prevent normal
operation.
CAUTION
When the refrigerant charging procedure is done or when pausing, close the valve of
the refrigerant tank immediately. If the valve is NOT closed immediately, remaining
pressure might charge additional refrigerant. Possible consequence: Incorrect
refrigerant amount.
2.1.4 Brine
If applicable. See the installation manual or installer reference guide of your
application for more information.
WARNING
The selection of the brine MUST be in accordance with the applicable legislation.
WARNING
Take sufficient precautions in case of brine leakage. If brine leaks, ventilate the area
immediately and contact your local dealer.
WARNING
The ambient temperature inside the unit can get much higher than that of the room,
e.g. 70°C. In case of a brine leak, hot parts inside the unit can create a hazardous
situation.
WARNING
The use and installation of the application MUST comply with the safety and
environmental precautions specified in the applicable legislation.
2.1.5 Water
If applicable. See the installation manual or installer reference guide of your
application for more information.
NOTICE
Make sure water quality complies with EU directive 2020/2184.
2.1.6 Electrical
DANGER: RISK OF ELECTROCUTION
▪Turn OFF all power supply before removing the switch box cover, connecting
electrical wiring or touching electrical parts.
▪Disconnect the power supply for more than 10minutes, and measure the voltage
at the terminals of main circuit capacitors or electrical components before
servicing. The voltage MUST be less than 50VDC before you can touch electrical
components. For the location of the terminals, see the wiring diagram.
▪Do NOT touch electrical components with wet hands.
▪Do NOT leave the unit unattended when the service cover is removed.

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WARNING
If NOT factory installed, a main switch or other means for disconnection, having a
contact separation in all poles providing full disconnection under overvoltage
categoryIII condition, MUST be installed in the fixed wiring.
WARNING
▪ONLY use copper wires.
▪Make sure the field wiring complies with the applicable legislation.
▪All field wiring MUST be performed in accordance with the wiring diagram
supplied with the product.
▪NEVER squeeze bundled cables and make sure they do NOT come in contact with
the piping and sharp edges. Make sure no external pressure is applied to the
terminal connections.
▪Make sure to install earth wiring. Do NOT earth the unit to a utility pipe, surge
absorber, or telephone earth. Incomplete earth may cause electrical shock.
▪Make sure to use a dedicated power circuit. NEVER use a power supply shared by
another appliance.
▪Make sure to install the required fuses or circuit breakers.
▪Make sure to install an earth leakage protector. Failure to do so may cause
electrical shock or fire.
▪When installing the earth leakage protector, make sure it is compatible with the
inverter (resistant to high frequency electric noise) to avoid unnecessary opening
of the earth leakage protector.
CAUTION
▪When connecting the power supply: connect the earth cable first, before making
the current-carrying connections.
▪When disconnecting the power supply: disconnect the current-carrying cables
first, before separating the earth connection.
▪The length of the conductors between the power supply stress relief and the
terminal block itself MUST be as such that the current-carrying wires are
tautened before the earth wire is in case the power supply is pulled loose from
the stress relief.
NOTICE
Precautions when laying power wiring:
▪Do NOT connect wiring of different thicknesses to the power terminal block (slack
in the power wiring may cause abnormal heat).
▪When connecting wiring which is the same thickness, do as shown in the figure
above.
▪For wiring, use the designated power wire and connect firmly, then secure to
prevent outside pressure being exerted on the terminal board.
▪Use an appropriate screwdriver for tightening the terminal screws. A screwdriver
with a small head will damage the head and make proper tightening impossible.
▪Over-tightening the terminal screws may break them.

2 | General safety precautions
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WARNING
▪After finishing the electrical work, confirm that each electrical component and
terminal inside the electrical components box is connected securely.
▪Make sure all covers are closed before starting up the unit.
NOTICE
ONLY applicable if the power supply is three‑phase, and the compressor has an ON/
OFF starting method.
If there exists the possibility of reversed phase after a momentary black out and the
power goes ON and OFF while the product is operating, attach a reversed phase
protection circuit locally. Running the product in reversed phase can break the
compressor and other parts.

3 | Specific installer safety instructions
Installer reference guide
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3 Specific installer safety instructions
Always observe the following safety instructions and regulations.
Application guidelines (see "6Application guidelines"[ 4
28])
CAUTION
If there is more than one leaving water zone, ALWAYS install a mixing valve station in
the main zone to decrease (in heating)/increase (in cooling) the leaving water
temperature when the additional zone has demand.
Installation site (see "7.1Preparing the installation site"[ 4
59])
WARNING
Follow the service space dimensions in this manual for correct installation of the unit.
See "7.1.1Installation site requirements of the indoor unit"[459].
WARNING
The appliance shall be stored in a room without continuously operating ignition
sources (example: open flames, an operating gas appliance or an operating electric
heater).
Special requirements for R32 (see "Special requirements for R32"[ 4
60])
WARNING
▪Do NOT pierce or burn refrigerant cycle parts.
▪Be aware that the refrigerant inside the system is odourless.
WARNING
Make sure installation, servicing, maintenance and repair comply with instructions
from Daikin and with applicable legislation and are executed ONLY by authorised
persons.
Opening and closing the unit (see "7.2Opening and closing the unit"[ 4
60])
DANGER: RISK OF ELECTROCUTION
Do NOT leave the unit unattended when the service cover is removed.
DANGER: RISK OF BURNING/SCALDING
Mounting the indoor unit (see "7.3Mounting the indoor unit"[ 4
67])
WARNING
Fixing method of the indoor unit MUST be in accordance with the instructions from
this manual. See "7.3Mounting the indoor unit"[467].
Piping installation (see "8Piping installation"[ 4
70])
WARNING
Field piping method MUST be in accordance with the instructions from this manual.
See "8Piping installation"[470].

3 | Specific installer safety instructions
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DANGER: RISK OF BURNING/SCALDING
WARNING
Provide adequate measures to prevent that the unit can be used as a shelter by small
animals. Small animals that make contact with electrical parts can cause
malfunctions, smoke or fire.
WARNING
Some sections of the refrigerant circuit may be isolated from other sections caused
by components with specific functions (e.g. valves). The refrigerant circuit therefore
features additional service ports for vacuuming, pressure relief or pressurizing the
circuit.
In case it is required to perform brazing on the unit, ensure that there is no pressure
remaining inside the unit. Internal pressures need to be released with ALL the service
ports indicated on the figures below opened. The location is depending on model
type.
WARNING
▪Only use R32 as refrigerant. Other substances may cause explosions and
accidents.
▪R32 contains fluorinated greenhouse gases. Its global warming potential (GWP)
value is 675. Do NOT vent these gases into the atmosphere.
▪When charging refrigerant, ALWAYS use protective gloves and safety glasses.
WARNING
Install the tundish away from any electrical device. Possible consequence: Electrical
shock or fire.
In case of freeze protection by glycol:
WARNING
Ethylene glycol is toxic.
WARNING
Due to the presence of glycol, corrosion of the system is possible. Uninhibited glycol
will turn acidic under the influence of oxygen. This process is accelerated by the
presence of copper and high temperatures. The acidic uninhibited glycol attacks
metal surfaces and forms galvanic corrosion cells that cause severe damage to the
system. Therefore it is important that:
▪the water treatment is correctly executed by a qualified water specialist,
▪a glycol with corrosion inhibitors is selected to counteract acids formed by the
oxidation of glycols,
▪no automotive glycol is used because their corrosion inhibitors have a limited
lifetime and contain silicates which can foul or plug the system,
▪galvanized pipes are NOT used in glycol systems since the presence may lead to
the precipitation of certain components in the glycol's corrosion inhibitor.

3 | Specific installer safety instructions
Installer reference guide
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Electrical installation (see "9Electrical installation"[ 4
81])
DANGER: RISK OF ELECTROCUTION
WARNING
Electrical wiring connection method MUST be in accordance with the instructions
from:
▪This manual. See "9Electrical installation"[481].
▪The wiring diagram, which is delivered with the unit, located on the inside of the
indoor unit switch box cover. For a translation of its legend, see "17.2 Wiring
diagram: Indoor unit"[4238].
WARNING
▪If the power supply has a missing or wrong N-phase, equipment might break
down.
▪Establish proper earthing. Do NOT earth the unit to a utility pipe, surge absorber,
or telephone earth. Incomplete earthing may cause electrical shock.
▪Install the required fuses or circuit breakers.
▪Secure the electrical wiring with cable ties so that the cables do NOT come in
contact with sharp edges or piping, particularly on the high-pressure side.
▪Do NOT use taped wires, stranded conductor wires, extension cords, or
connections from a star system. They can cause overheating, electrical shock or
fire.
▪Do NOT install a phase advancing capacitor, because this unit is equipped with an
inverter. A phase advancing capacitor will reduce performance and may cause
accidents.
WARNING
▪All wiring MUST be performed by an authorised electrician and MUST comply
with the applicable legislation.
▪Make electrical connections to the fixed wiring.
▪All components procured on-site and all electrical construction MUST comply
with the applicable legislation.
WARNING
ALWAYS use multicore cable for power supply cables.
WARNING
The backup heater MUST have a dedicated power supply and MUST be protected by
the safety devices required by the applicable legislation.
WARNING
Stripped wire. Make sure that stripped wire cannot make contact with possible
water on the bottom plate.
WARNING
If the supply cord is damaged, it MUST be replaced by the manufacturer, its service
agent or similarly qualified persons in order to avoid a hazard.

3 | Specific installer safety instructions
Installer reference guide
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CAUTION
Do NOT push or place redundant cable length in the unit.
CAUTION
To guarantee the unit is completely earthed, ALWAYS connect the backup heater
power supply and the earth cable.
INFORMATION
Details of type and rating of fuses, or rating of circuit breakers are described in
"9Electrical installation"[481].
Configuration (see "11Configuration"[ 4
133])
WARNING
Be aware that the domestic hot water temperature at the hot water tap will be equal
to the value selected in field setting [2-03] after a disinfection operation.
When the high domestic hot water temperature can be a potential risk for human
injuries, a mixing valve (field supply) shall be installed at the hot water outlet
connection of the domestic hot water tank. This mixing valve shall secure that the
hot water temperature at the hot water tap never rise above a set maximum value.
This maximum allowable hot water temperature shall be selected according to the
applicable legislation.
CAUTION
The disinfection function settings MUST be configured by the installer according to
the applicable legislation.
CAUTION
Make sure that the disinfection function start time [5.7.3] with defined duration
[5.7.5] is NOT interrupted by possible domestic hot water demand.
Commissioning (see "12Commissioning"[ 4
208])
WARNING
Commissioning method MUST be in accordance with the instructions from this
manual. See "12Commissioning"[4208].
Maintenance and service (see "14Maintenance and service"[ 4
219])
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING/SCALDING
DANGER: RISK OF BURNING/SCALDING
The water in the tank can be very hot.

3 | Specific installer safety instructions
Installer reference guide
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WARNING
If the internal wiring is damaged, it has to be replaced by the manufacturer, its
service agent or similarly qualified persons.
CAUTION
Water coming out of the valve may be very hot.
Troubleshooting (see "15Troubleshooting"[ 4
225])
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING/SCALDING
WARNING
▪When carrying out an inspection on the switch box of the unit, ALWAYS make
sure that the unit is disconnected from the mains. Turn off the respective circuit
breaker.
▪When a safety device was activated, stop the unit and find out why the safety
device was activated before resetting it. NEVER shunt safety devices or change
their values to a value other than the factory default setting. If you are unable to
find the cause of the problem, call your dealer.
WARNING
Prevent hazards due to inadvertent resetting of the thermal cut-out: power to this
appliance MUST NOT be supplied through an external switching device, such as a
timer, or connected to a circuit that is regularly turned ON and OFF by the utility.
WARNING
Air purging heat emitters or collectors. Before you purge air from heat emitters or
collectors, check if or is displayed on the home screen of the user interface.
▪If not, you can purge air immediately.
▪If yes, make sure that the room where you want to purge air is sufficiently
ventilated. Reason: Refrigerant might leak into the water circuit, and
subsequently into the room when you purge air from the heat emitters or
collectors.