Daikin ETVH12S18EA6V User manual

Operation manual
Daikin Altherma 3 H MT F+W English
Operation manual
Daikin Altherma 3 H MT F+W
ETVH12S(U)18EA6V
ETVH12S(U)23EA6V
ETVH12S18EA9W
ETVH12S23EA9W
ETVX12S18EA6V
ETVX12S23EA6V
ETVX12S18EA9W
ETVX12S23EA9W
ETBH12EF6V
ETBH12EF9W
ETBX12EF6V
ETBX12EF9W

Table of contents
Operation manual
2
ETVH/X12S18+23EA6V+9W + ETBH/X12EF6V+9W
Daikin Altherma 3 H MT F+W
4P634883-1 – 2021.03
Table of contents
1 Installer settings: Tables to be filled in by
installer 2
1.1 Configuration wizard.................................................................. 2
1.2 Settings menu ........................................................................... 2
2 Quick guide 3
2.1 User permission level ................................................................ 3
2.2 Space heating/cooling ............................................................... 3
2.3 Domestic hot water.................................................................... 5
3 General information 6
3.1 About this document.................................................................. 6
3.2 About the system....................................................................... 6
3.2.1 Components in a typical system layout....................... 7
4 Operation 7
4.1 User interface: Overview ........................................................... 7
4.2 Menu structure: Overview user settings .................................... 8
4.3 Possible screens: Overview ...................................................... 9
4.3.1 Home screen............................................................... 9
4.3.2 Main menu screen ...................................................... 10
4.3.3 Setpoint screen ........................................................... 10
4.3.4 Detailed screen with values ........................................ 11
4.4 Turning operation ON or OFF ................................................... 11
4.4.1 Visual indication .......................................................... 11
4.4.2 To turn ON or OFF...................................................... 11
4.5 Reading out information ............................................................ 11
To read out information............................................... 11
Possible read-out information ..................................... 12
4.6 Space heating/cooling control ................................................... 12
4.6.1 Setting the space operation mode .............................. 12
4.6.2 To change the desired room temperature................... 12
4.6.3 To change the desired leaving water temperature...... 12
4.7 Domestic hot water control........................................................ 13
4.7.1 Reheat mode .............................................................. 13
4.7.2 Scheduled mode ......................................................... 13
4.7.3 Scheduled + reheat mode........................................... 13
4.7.4 Using DHW powerful operation................................... 13
4.8 Schedule screen: Example........................................................ 14
4.9 Weather-dependent curve......................................................... 15
4.9.1 What is a weather-dependent curve? ......................... 15
4.9.2 2-points curve ............................................................. 16
4.9.3 Slope-offset curve ....................................................... 16
4.9.4 Using weather-dependent curves ............................... 17
5 Energy saving tips 17
6 Maintenance and service 18
6.1 Overview: Maintenance and service ......................................... 18
7 Troubleshooting 18
7.1 To display the help text in case of a malfunction....................... 18
7.2 To check the malfunction history............................................... 18
7.3 Symptom: You are feeling too cold (hot) in your living room..... 19
7.4 Symptom: The water at the tap is too cold ................................ 19
7.5 Symptom: Heat pump failure..................................................... 19
7.6 Symptom: The system is making gurgling noises after
commissioning........................................................................... 19
8 Disposal 20
9 Glossary 20
1 Installer settings: Tables to be
filled in by installer
1.1 Configuration wizard
Setting Fill in…
System
Indoor unit type (read only)
Backup heater type [9.3.1]
(read only)
Domestic hot water [9.2.1]
Emergency [9.5]
Number of zones [4.4]
Glycol Filled system
(overview field setting [E‑0D])
Booster heater capacity
[9.4.1] (if applicable)
Backup heater
Voltage [9.3.2]
Configuration [9.3.3]
Capacity step 1 [9.3.4]
Additional capacity step 2
[9.3.5] (if applicable)
Main zone
Emitter type [2.7]
Control [2.9]
Setpoint mode [2.4]
Schedule [2.1]
WD curve type [2.E]
Additional zone (only if [4.4]=1, dual zone)
Emitter type [3.7]
Control (read only) [3.9]
Setpoint mode [3.4]
Schedule [3.1]
WD curve type [3.C] (read only)
Tank (if applicable)
Heat up mode [5.6]
Comfort setpoint [5.2]
Eco setpoint [5.3]
Reheat setpoint [5.4]
Setpoint mode [5.B]
WD curve type [5.E] (read only)
1.2 Settings menu
Setting Fill in…
Main zone
Thermostat type [2.A]
Additional zone (if applicable)
Thermostat type [3.A]
Information
Dealer information [8.3]

2 Quick guide
Operation manual
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ETVH/X12S18+23EA6V+9W + ETBH/X12EF6V+9W
Daikin Altherma 3 H MT F+W
4P634883-1 – 2021.03
2 Quick guide
2.1 User permission level
The amount of information you can read out and edit in the menu
structure depends on your user permission level:
▪User: Standard mode
▪Advanced user: You can read out and edit more information
To change the user permission level
1Go to [B]: User profile.
User profile
B
2Enter the applicable pin code for the user permission
level.
—
▪ Browse through the list of digits and change the
selected digit.
▪ Move the cursor from left to right.
▪ Confirm the pin code and proceed.
User pin code
The User pin code is 0000.
0000
User
Advanced user pin code
The Advanced user pin code is 1234. Additional menu items for the
user are now visible.
1234
Advanced user
2.2 Space heating/cooling
To turn space heating/cooling operation ON or OFF
NOTICE
Room frost protection. Even if you turn OFF space
heating/cooling operation ([C.2]: Operation > Space
heating/cooling), room frost protection operation –if
enabled– can still activate. However, for leaving water
temperature control and external room thermostat control,
the protection is NOT guaranteed.
NOTICE
Water pipe freeze prevention. Even if you turn OFF
space heating/cooling operation ([C.2]: Operation >
Space heating/cooling), water pipe freeze prevention –
if enabled– will remain active.
1Go to [C.2]: Operation > Space heating/cooling.
Operation
Space heating/cooling
Tank Off
On
C.2
2Set operation to On or Off.
To change the desired room temperature
During room temperature control, you can use the room temperature
setpoint screen to read out and adjust the desired room temperature.
1Go to [1]: Room.
Room
1
2Adjust the desired room temperature.
+
–
21°C
1
a b
Room
a Actual room temperature
b Desired room temperature
To change the desired leaving water temperature
You can use the leaving water temperature setpoint screen to read
out and adjust the desired leaving water temperature.
1Go to [2]: Main zone or [3]: Additional zone.
Main zone
2
Additional zone
3

2 Quick guide
Operation manual
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ETVH/X12S18+23EA6V+9W + ETBH/X12EF6V+9W
Daikin Altherma 3 H MT F+W
4P634883-1 – 2021.03
2Adjust the desired leaving water temperature.
+
–
35°C
2
a b
Main zone
+
–
45°C
3
a b
Additional zone
a Actual leaving water temperature
b Desired leaving water temperature
To change the weather-dependent curve for the space heating/
cooling zones
1Go to the applicable zone:
Zone Go to …
Main zone – Heating [2.5] Main zone > Heating WD
curve
Main zone – Cooling [2.6] Main zone > Cooling WD
curve
Additional zone – Heating [3.5] Additional zone >
Heating WD curve
Additional zone – Cooling [3.6] Additional zone >
Cooling WD curve
2Change the weather-dependent curve.
There are 2 types of WD curves: slope-offset curve (default),
and 2-points curve. If needed, you can change the type in
[2.E] Main zone > WD curve type. The way to adjust the
curve depends on the type.
Slope-offset curve
Slope. When slope is changed,
the new preferred temperature at
X1 is unequally higher than the
preferred temperature at X2.
X1 X2
c
d
Y1
Y2
Y3
Y4
a b
Offset. When offset is changed,
the new preferred temperature at
X1 is equally higher as the
preferred temperature at X2.
Y1
Y2
Y3
Y4
X1 X2
a b
c
d
X1, X2 Outdoor ambient temperature
Y1~Y4 Desired leaving water temperature
aWD curve before changes
bWD curve after changes
cSlope
dOffset
Possible actions on this screen
Select slope or offset.
Increase or decrease the slope/offset.
When slope is selected: set slope and go to offset.
When offset is selected: set offset.
Confirm changes and return to the submenu.
2-points curve
Y1
Y2
X1 X2
X1, X2 Outdoor ambient temperature
Y1, Y2 Desired leaving water temperature
Possible actions on this screen
Go through the temperatures.
Change the temperature.
Go to the next temperature.
Confirm changes and proceed.
More information
For more information, see also:
▪"4.4Turning operation ON or OFF"[411]
▪"4.6Space heating/cooling control"[412]
▪"4.8Schedule screen: Example"[414]
▪"4.9Weather-dependent curve"[415]
▪ User reference guide

2 Quick guide
Operation manual
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ETVH/X12S18+23EA6V+9W + ETBH/X12EF6V+9W
Daikin Altherma 3 H MT F+W
4P634883-1 – 2021.03
2.3 Domestic hot water
To turn tank heating operation ON or OFF
NOTICE
Disinfection mode. Even if you turn OFF tank heating
operation ([C.3]: Operation > Tank), disinfection mode will
remain active. However, if you turn it OFF while
disinfection is running, an AH error occurs.
1Go to [C.3]: Operation > Tank.
Operation
Tank Off
On
Space heating/cooling
C.3
2Set operation to On or Off.
To change the tank temperature setpoint
In Reheat only mode, you can use the tank temperature setpoint
screen to read out and adjust the domestic hot water temperature.
1Go to [5]: Tank.
Tank
5
2Adjust the domestic hot water temperature.
+
–
50°C
5
a b
Tank
a Actual domestic hot water temperature
b Desired domestic hot water temperature
In other modes, you can only view the setpoint screen but not modify
it. Instead, you can modify the settings for the Comfort setpoint
[5.2], Eco setpoint [5.3] and Reheat setpoint [5.4].
More information
For more information, see also:
▪"4.4Turning operation ON or OFF"[411]
▪"4.7Domestic hot water control"[413]
▪"4.8Schedule screen: Example"[414]
▪ User reference guide

3 General information
Operation manual
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ETVH/X12S18+23EA6V+9W + ETBH/X12EF6V+9W
Daikin Altherma 3 H MT F+W
4P634883-1 – 2021.03
3 General information
3.1 About this document
Thank you for purchasing this product. Please:
▪ Read the documentation carefully before operating the user
interface to ensure the best possible performance.
▪ Request the installer to inform you about the settings that he used
to configure your system. Check if he has filled in the installer
settings tables. If NOT, request him to do so.
▪ Keep the documentation for future reference.
Target audience
Endusers
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 indoor unit)
▪Operation manual:
▪ Quick guide for basic usage
▪ Format: Paper (in the box of the indoor unit)
▪User reference guide:
▪ Detailed step-by-step instructions and background information
for basic and advanced usage
▪ Format: Digital files on http://www.daikineurope.com/support-
and-manuals/product-information/
▪Installation manual – Outdoor unit:
▪ Installation instructions
▪ Format: Paper (in the box of the outdoor unit)
▪Installation manual – Indoor unit:
▪ Installation instructions
▪ Format: Paper (in the box of the indoor unit)
▪Installer reference guide:
▪ Preparation of the installation, good practices, reference
data,…
▪ Format: Digital files on http://www.daikineurope.com/support-
and-manuals/product-information/
▪Addendum book for optional equipment:
▪ Additional info about how to install optional equipment
▪ Format: Paper (in the box of the indoor unit) + Digital files on
http://www.daikineurope.com/support-and-manuals/product-
information/
Latest revisions of the supplied documentation may be available on
the regional Daikin website or via your installer.
The original documentation is written in English. All other languages
are translations.
Daikin Residential Controller app
If set up by your installer, you can use the
Daikin Residential Controller app to control and
monitor the status of your system. For more
information, see:
http://www.onlinecontroller.daikineurope.com/
Breadcrumbs
Breadcrumbs (example: [4.3]) help you to locate where you are in
the menu structure of the user interface.
1To enable the breadcrumbs: In the home screen or
main menu screen, press the help button. The
breadcrumbs appear in the top left corner of the
screen.
2To disable the breadcrumbs: Press the help button
again.
This document also mentions these breadcrumbs. Example:
1Go to [4.3]: Space heating/cooling > Operation
range.
This means:
1Starting from the home screen, turn the left dial and
go to Space heating/cooling.
4
Space heating/cooling
2Press the left dial to enter the submenu.
3Turn the left dial and go to Operation range.
Operation range
4.3
4Press the left dial to enter the submenu.
3.2 About the system
Depending on the system layout, the system can:
▪ Heat up a space
▪ Cool down a space (if a heating/cooling heat pump model is
installed)
▪ Produce domestic hot water (if a DHWtank is installed)
INFORMATION
Cooling is only applicable in case of:
▪ Reversible models
▪ Heating only models + conversion kit

4 Operation
Operation manual
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ETVH/X12S18+23EA6V+9W + ETBH/X12EF6V+9W
Daikin Altherma 3 H MT F+W
4P634883-1 – 2021.03
3.2.1 Components in a typical system layout
g
A
db
a
f
e
c
BC
AMain zone. Example: Living room.
BAdditional zone. Example: Bedroom.
CTechnical room. Example: Garage.
aOutdoor unit heatpump
bIndoor unit heatpump
cDomestic hot water (DHW) tank
dUser interface of the indoor unit
eDedicated Human Comfort Interface (BRC1HHDA used as
room thermostat)
fUnderfloor heating
gRadiators, heatpump convectors, or fancoil units
INFORMATION
The indoor unit and the domestic hot water tank (if
installed) can be separated or integrated depending on the
indoor unit type.
4 Operation
INFORMATION
Cooling is only applicable in case of:
▪ Reversible models
▪ Heating only models + conversion kit
4.1 User interface: Overview
The user interface has the following components:
b
c
a
aStatus indicator
bLCD screen
cDials and buttons
a
b
c
aStatus indicator
bLCD screen
cDials and buttons
Status indicator
The LEDs of the status indicator light up or blink to show the
operating mode of the unit.
LED Mode Description
Blinking blue Standby The unit is not in operation.
Continuous blue Operation The unit is in operation.
Blinking red Malfunction A malfunction occurred.
See "7.1To display the help text
in case of a malfunction"[418]
for more information.
LCD screen
The LCD screen has a sleeping function. After 15 min of non-
interaction with the user interface, the screen darkens. Pressing any
button or rotating any dial awakens the display.
Dials and buttons
You use the dials and buttons:
▪ To navigate through the screens, menus and settings of the LCD
screen
▪ To set values
a b c d e
Item Description
aLeft dial The LCD shows an arc on the left side of the
display when you can use the left dial.
▪ : Turn, then press the left dial. Navigate
through the menu structure.
▪ : Turn the left dial. Choose a menu item.
▪ : Press the left dial. Confirm your choice
or go to a submenu.
bBack button : Press to go back 1 step in the menu structure.
cHome
button
: Press to go back to the home screen.
dHelp button : Press to show a help text related to the current
page (if available).
eRight dial The LCD shows an arc on the right side of the
display when you can use the right dial.
▪ : Turn, then press the right dial. Change
a value or setting, shown at the right side of the
screen.
▪ : Turn the right dial. Navigate through
the possible values and settings.
▪ : Press the right dial. Confirm your
choice and go to the next menu item.

4 Operation
Operation manual
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ETVH/X12S18+23EA6V+9W + ETBH/X12EF6V+9W
Daikin Altherma 3 H MT F+W
4P634883-1 – 2021.03
4.2 Menu structure: Overview user settings
[2] Main zone
Schedule
Heating schedule
Setpoint mode
Cooling schedule
Heating WD curve
Cooling WD curve
WD curve type
[3] Additional zone
Schedule
Heating schedule
Setpoint mode
Cooling schedule
Heating WD curve
Cooling WD curve
WD curve type
[4] Space heating/cooling
Operation mode
Operation mode schedule
[7] User settings
Language
Time/date
Holiday
Quiet
Electricity price
Gas price
[8] Information
Energy data
Malfunction history
Dealer information
Sensors
Actuators
Operation modes
About
Connection status
Running hours
[B]User profile
[C]Operation
Space heating/cooling
Tank
[1.4] Antifrost
Activation
Room setpoint
[1.5] Setpoint range
Heating minimum
Heating maximum
Cooling minimum
Cooling maximum
[7.2] Time/date
Hours
Minutes
Year
Month
Day
Daylight savings time
Format
[7.3] Holiday
Activation
From
Till
[7.4] Quiet
Activation
Schedule
Level
[7.5] Electricity price
High
Medium
Low
Schedule
[8.1] Energy data
Electricity input
Produced heat
(**)
(**)
[5] Tank
Powerful operation
Comfort setpoint
Eco setpoint
Reheat setpoint
Schedule
WD curve
WD curve type
(*)
(*)
(*)
(*)
(*)
(*)
(*)
(*)
[1.9] Room comfort setpoint
Heating comfort setpoint
Cooling comfort setpoint
(*)
[1] Room
Room sensor offset
Setpoint range
Antifrost
Cooling schedule
Heating schedule
Schedule
Room comfort setpoint
[D]Wireless gateway
Mode
Reboot
WPS
Remove from cloud
(***)
Home network connection
Cloud connection
Setpoint screen
(*) Only applicable for reversible models, or heating only models + conversion kit
(**) Only accessible by installer
(***) Only applicable when WLAN is installed
INFORMATION
Depending on the selected installer settings and unit type,
settings will be visible/invisible.

4 Operation
Operation manual
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ETVH/X12S18+23EA6V+9W + ETBH/X12EF6V+9W
Daikin Altherma 3 H MT F+W
4P634883-1 – 2021.03
4.3 Possible screens: Overview
The most common screens are as follows:
+
–
a
OR
b
c
c2
c4
c1
c3
aHome screen
bMain menu screen
cLower level screens:
c1: Setpoint screen
c2: Detailed screen with values
c3: Screen with weather-dependent curve
c4: Screen with schedule
4.3.1 Home screen
Press the button to go back to the home screen. You see an
overview of the unit configuration and the room and setpoint
temperatures. Only symbols applicable for your configuration are
visible on the home screen.
6
1.6
bar
26 Feb 2019
22:19
55
21
35
j
e2
l
k1
k2
k3
45
d
e1
g3
g2
h1
g1
f
i2 i3 i4 h2i1
a2a1e3 b c
Possible actions on this screen
Go through the list of the main menu.
Go to the main menu screen.
Enable/disable breadcrumbs.
Item Description
a Domestic hot water
a1 Domestic hot water
a2
55
Measured tank temperature(a)
Item Description
b Disinfection / Powerful
Disinfection mode active
Powerful operation mode active
c Emergency
Heat pump failure and system operates in
Emergency mode or heat pump is forced off.
d Current date and time
e Smart energy
e1 Smart energy is available via solar panels or smart
grid.
e2 Smart energy is currently being used for space
heating.
e3 Smart energy is currently being used for domestic
hot water.
f Space operation mode
Cooling
Heating
g Outdoor / quiet mode
g1
6
Measured outdoor temperature(a)
g2 Quiet mode active
g3 Outdoor unit
h Indoor unit / domestic hot water tank
h1 Floor-standing indoor unit with integrated tank
Wall-mounted indoor unit
Wall-mounted indoor unit with separated tank
h2 Water pressure
i Main zone
i1 Installed room thermostat type:
Unit operation is decided based on the ambient
temperature of the dedicated Human Comfort
Interface (BRC1HHDA used as room thermostat).
Unit operation is decided by the external room
thermostat (wired or wireless).
— No room thermostat installed or set. Unit operation
is decided based on the leaving water temperature
regardless of the actual room temperature and/or
heating demand of the room.
i2 Installed heat emitter type:
Underfloor heating
Fancoil unit
Radiator
i3
21
Measured room temperature(a)
i4
35
Leaving water temperature setpoint(a)
j Holiday mode
Holiday mode active

4 Operation
Operation manual
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Daikin Altherma 3 H MT F+W
4P634883-1 – 2021.03
Item Description
k Additional zone
k1 Installed room thermostat type:
Unit operation is decided by the external room
thermostat (wired or wireless).
— No room thermostat installed or set. Unit operation
is decided based on the leaving water temperature
regardless of the actual room temperature and/or
heating demand of the room.
k2 Installed heat emitter type:
Underfloor heating
Fancoil unit
Radiator
k3
45
Leaving water temperature setpoint(a)
l Malfunction
A malfunction occurred.
See "7.1To display the help text in case of a
malfunction"[418] for more information.
(a) If the corresponding operation (for example: space heating) is not
active, the circle is greyed out.
4.3.2 Main menu screen
Starting from the home screen, press ( ) or turn ( ) the
left dial to open the main menu screen. From the main menu, you
can access the different setpoint screens and submenus.
a
2
Main zone
Additional zone
Room
Malfunctioning
Space heating/cooling
aSelected submenu
Possible actions on this screen
Go through the list.
Enter the submenu.
Enable/disable breadcrumbs.
Submenu Description
[0] or
Malfunctioning
Restriction: Only displayed if a
malfunction occurs.
See "7.1To display the help text in
case of a malfunction"[418] for more
information.
[1] Room Restriction: Only displayed if a
dedicated Human Comfort Interface
(BRC1HHDA used as room
thermostat) is controlling the indoor
unit.
Set the room temperature.
[2] Main zone Shows the applicable symbol for your
main zone emitter type.
Set the leaving water temperature for
the main zone.
[3] Additional zone Restriction: Only displayed if there
are two leaving water temperature
zones. Shows the applicable symbol
for your additional zone emitter type.
Set the leaving water temperature for
the additional zone (if present).
Submenu Description
[4] Space heating/
cooling
Shows the applicable symbol of your
unit.
Put the unit in heating mode or cooling
mode. You cannot change the mode
on heating only models.
[5] Tank Set the domestic hot water tank
temperature.
[7] User settings Gives access to user settings such as
holiday mode and quiet mode.
[8] Information Displays data and information about
the indoor unit.
[9] Installer
settings
Restriction: Only for the installer.
Gives access to advanced settings.
[A] Commissioning Restriction: Only for the installer.
Perform tests and maintenance.
[B] User profile Change the active user profile.
[C] Operation Turn heating/cooling functionality and
domestic hot water preparation on or
off.
[D] Wireless
gateway
Restriction: Only displayed if a
wireless LAN (WLAN) is installed.
Contains settings needed when
configuring the Daikin Residential
Controller app.
4.3.3 Setpoint screen
The setpoint screen is displayed for screens describing system
components that need a setpoint value.
Examples
[1] Room temperature screen
+
–
21°C
1
Room
[2] Main zone screen
+
–
35°C
2
Main zone
[3] Additional zone screen
+
–
45°C
3
Additional zone
[5] Tank temperature screen
+
–
50°C
5
Tank
Explanation
a1
d
+
–
d
ed
e
c
a2
b1
b2
Possible actions on this screen
Go through the list of the submenu.
Go to the submenu.
Adjust and automatically apply the desired
temperature.

4 Operation
Operation manual
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Daikin Altherma 3 H MT F+W
4P634883-1 – 2021.03
Item Description
Minimum temperature limit a1 Fixed by the unit
a2 Restricted by the installer
Maximum temperature limit b1 Fixed by the unit
b2 Restricted by the installer
Current temperature cMeasured by the unit
Desired temperature dTurn the right dial to
increase/decrease.
Submenu eTurn or press the left dial to
go to the submenu.
4.3.4 Detailed screen with values
Example:
a bc
a bc
7.2.1
Time/date
Hours 11
30
Minutes
aSettings
bValues
cSelected setting and value
Possible actions on this screen
Go through the list of settings.
Change the value.
Go to the next setting.
Confirm changes and proceed.
4.4 Turning operation ON or OFF
4.4.1 Visual indication
Certain functionalities of the unit can be enabled or disabled
separately. If a functionality is disabled, the corresponding
temperature icon in the home screen will be greyed out.
Space heating/cooling operation
55
21
35
45
a
55
21
35
45
b
aSpace heating/cooling operation ON
bSpace heating/cooling operation OFF
Tank heating operation
55
21
35
45
c
55
21
35
45
d
cTank heating operation ON
dTank heating operation OFF
4.4.2 To turn ON or OFF
Space heating/cooling operation
NOTICE
Room frost protection. Even if you turn OFF space
heating/cooling operation ([C.2]: Operation > Space
heating/cooling), room frost protection operation –if
enabled– can still activate. However, for leaving water
temperature control and external room thermostat control,
the protection is NOT guaranteed.
NOTICE
Water pipe freeze prevention. Even if you turn OFF
space heating/cooling operation ([C.2]: Operation >
Space heating/cooling), water pipe freeze prevention –
if enabled– will remain active.
1Go to [C.2]: Operation > Space heating/cooling.
Operation
Space heating/cooling
Tank Off
On
C.2
2Set operation to On or Off.
Tank heating operation
NOTICE
Disinfection mode. Even if you turn OFF tank heating
operation ([C.3]: Operation > Tank), disinfection mode will
remain active. However, if you turn it OFF while
disinfection is running, an AH error occurs.
1Go to [C.3]: Operation > Tank.
Operation
Tank Off
On
Space heating/cooling
C.3
2Set operation to On or Off.
4.5 Reading out information
To read out information
1Go to [8]: Information.

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Possible read-out information
In menu… You can read out…
[8.1] Energy data Produced energy, consumed
electricity, and consumed gas
[8.2] Malfunction history Malfunction history
[8.3] Dealer information Contact/helpdesk number
[8.4] Sensors Room, tank or domestic hot
water, outside, and leaving water
temperature (if applicable)
[8.5] Actuators Status/mode of each actuator
Example: Domestic hot water
pump ON/OFF
[8.6] Operation modes Current operation mode
Example: Defrost/oil return
mode
[8.7] About Version information about the
system
[8.8] Connection status Information about the connection
status of the unit, the room
thermostat and the LAN adapter.
[8.9] Running hours Running hours of specific system
components
4.6 Space heating/cooling control
4.6.1 Setting the space operation mode
About space operation modes
Your unit can be a heating or a heating/cooling model:
▪ If your unit is a heating model, it can heat up a space.
▪ If your unit is a heating/cooling model, it can both heat up and cool
down a space. You have to tell the system which operation mode
to use.
To tell the system which space operation to use, you can:
You can… Location
Check which space operation mode is
currently used.
Home screen
Set the space operation mode permanently. Main menu
Restrict automatic changeover according to
a monthly schedule.
To set the space operation mode
1Go to [4.1]: Space heating/cooling > Operation
mode
2Select one of the following options:
▪Heating: Only heating mode
▪Cooling: Only cooling mode
▪Automatic: The operation mode changes
automatically between heating and cooling based
on the outdoor temperature. Restricted per month
according to the Operation mode schedule
[4.2].
To restrict automatic changeover according to a schedule
Conditions: You set the space operation mode to Automatic.
1Go to [4.2]: Space heating/cooling > Operation
mode schedule.
2Select a month.
3For each month, select an option:
▪Reversible: Not restricted
▪Heating only: Restricted
▪Cooling only: Restricted
4Confirm the changes.
4.6.2 To change the desired room temperature
During room temperature control, you can use the room temperature
setpoint screen to read out and adjust the desired room temperature.
1Go to [1]: Room.
Room
1
2Adjust the desired room temperature.
+
–
21°C
1
a b
Room
a Actual room temperature
b Desired room temperature
If scheduling is on after changing the desired room temperature
▪ The temperature will stay the same as long as there is no
scheduled action.
▪ The desired room temperature will return to its scheduled value
whenever a scheduled action occurs.
You can avoid scheduled behaviour by (temporarily) turning off
scheduling.
To turn off room temperature scheduling
1Go to [1.1]: Room > Schedule.
2Select No.
4.6.3 To change the desired leaving water
temperature
INFORMATION
The leaving water is the water that is sent to the heat
emitters. The desired leaving water temperature is set by
your installer in accordance with the heat emitter type.
Only adjust the leaving water temperature settings in case
of problems.
You can use the leaving water temperature setpoint screen to read
out and adjust the desired leaving water temperature.

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1Go to [2]: Main zone or [3]: Additional zone.
Main zone
2
Additional zone
3
2Adjust the desired leaving water temperature.
+
–
35°C
2
a b
Main zone
+
–
45°C
3
a b
Additional zone
a Actual leaving water temperature
b Desired leaving water temperature
4.7 Domestic hot water control
4.7.1 Reheat mode
In reheat mode the DHW tank continuously heats up to the
temperature shown on the home screen (example: 50°C) when the
temperature drops below a certain value.
t
60°C
00:00 07:00
50°C
15°C
40°C
14:00 21:00
1
2
3
4
Tt
TtDHWtank temperature
tTime
INFORMATION
Risk of space heating capacity shortage for domestic hot
water tank without internal booster heater: In case of
frequent domestic hot water operation, frequent and long
space heating/cooling interruption will happen when
selecting the following:
Tank > Heat up mode > Reheat only.
INFORMATION
When the DHW tank mode is reheat, the risk for capacity
shortage and comfort problem is significant. In case of
frequent reheat operation, space heating/cooling function
is regularly interrupted.
4.7.2 Scheduled mode
In scheduled mode the DHWtank produces hot water corresponding
to a schedule. The best time to allow the tank to produce hot water is
at night, because the space heating demand is lower.
Example:
t
60°C
00:00 07:00
50°C
15°C
40°C
14:00 21:00
1
2
34
5
Tt
TtDHWtank temperature
tTime
▪ Initially, the DHW tank temperature is the same as the
temperature of the domestic water entering the DHW tank
(example: 15°C).
▪ At 00:00 the DHWtank is programmed to heat up the water to a
preset value (example: Comfort = 60°C).
▪ During the morning, you consume hot water and the DHW tank
temperature decreases.
▪ At 14:00 the DHWtank is programmed to heat up the water to a
preset value (example: Eco = 50°C). Hot water is available again.
▪ During the afternoon and evening, you consume hot water again
and the DHWtank temperature decreases again.
▪ At 00:00 the next day, the cycle repeats.
4.7.3 Scheduled + reheat mode
In scheduled + reheat mode, the domestic hot water control is the
same as in scheduled mode. However, when the DHW tank
temperature drops below a preset value (=reheat tank temperature –
hysteresis value; example: 35°C), the DHW tank heats up until it
reaches the reheat set point (example: 45°C). This ensures that a
minimum amount of hot water is available at all times.
Example:
t
Tt
60°C
00:00 07:00
50°C
45°C
15°C
14:00 21:00
35°C
1
24
5
3
TtDomestic hot water tank temperature
tTime
4.7.4 Using DHW powerful operation
About powerful operation
Powerful operation allows the domestic hot water to be heated by
the backup heater or booster heater. Use this mode on days when
there is more hot water usage than usual.

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To check if powerful operation is active
If is displayed on the home screen, powerful operation is active.
Activate or deactivate Powerful operation as follows:
1Go to [5.1]: Tank > Powerful operation
2Turn powerful operation Off or On.
Usage example: You immediately need more hot water
You are in the following situation:
▪ You already consumed most of your domestic hot water.
▪ You cannot wait for the next scheduled action to heat up the
domestic hot water tank.
Then you can activate powerful operation. The domestic hot water
tank will start heating up the water to the Comfort temperature.
INFORMATION
When powerful operation is active, the risk of space
heating/cooling and capacity shortage comfort problems is
significant. In case of frequent domestic hot water
operation, frequent and long space heating/cooling
interruptions will happen.
4.8 Schedule screen: Example
This example shows how to set a room temperature schedule in
heating mode for the main zone.
INFORMATION
The procedures to program other schedules are similar.
To program the schedule: overview
Example: You want to program the following schedule:
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
Prerequisite: The room temperature schedule is only available if
room thermostat control is active. If leaving water temperature
control is active, you can program the main zone schedule instead.
1Go to the schedule.
2(optional) Clear the content of the whole week schedule or the
content of a selected day schedule.
3Program the schedule for Monday.
4Copy the schedule to the other weekdays.
5Program the schedule for Saturday and copy it to Sunday.
6Give the schedule a name.
To go to the schedule
1Go to [1.1]: Room > Schedule.
2Set scheduling to Yes.
3Go to [1.2]: Room > Heating schedule.
To clear the content of the week schedule
1Select the name of the current schedule.
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
2Select Delete.
Delete
Rename
Select
3Select OK to confirm.
To clear the content of a day schedule
1Select the day of which you want to clear the
content. For example Friday
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
C
2Select Delete.
Delete
Edit
Copy
3Select OK to confirm.
To program the schedule for Monday
1Select Monday.
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
2Select Edit.
Delete
Edit
Copy
3Use the left dial to select an entry and edit the entry
with the right dial. You can program up to 6 actions
each day. On the bar, a high temperature has a
darker colour than a low temperature.
0
6:00
8:30
17:30
20°C
18°C
22:00
--:--
18°C
--
21°C
12 24
Mon
Note: To clear an action, set its time as the time of
the previous action.
4Confirm the changes.
Result: The schedule for Monday is defined. The
value of the last action is valid until the next
programmed action. In this example, Monday is the
first day you programmed. Thus, the last
programmed action is valid up to the first action of
next Monday.

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To copy the schedule to the other weekdays
1Select Monday.
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
2Select Copy.
Delete
Edit
Copy
Result: Next to the copied day, "C" is displayed.
3Select Tuesday.
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
C
4Select Paste.
Delete
Edit
Copy
Paste
Result:
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
C
5Repeat this action for all other weekdays.
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
C
—
To program the schedule for Saturday and copy it to Sunday
1Select Saturday.
2Select Edit.
3Use the left dial to select an entry and edit the entry
with the right dial.
0
8:00
23:00
--:--
21°C
18°C
--
12 24
Sat
4Confirm the changes.
5Select Saturday.
6Select Copy.
7Select Sunday.
8Select Paste.
Result:
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
C
To rename the schedule
1Select the name of the current schedule.
Mon
Sat
Wed
Fri
Thu
Tue
Sun
User defined 1
2Select Rename.
Delete
Rename
Select
3(optional) To delete the current schedule name,
browse through the character list until ← is
displayed, then press to remove the previous
character. Repeat for each character of the schedule
name.
4To name the current schedule, browse through the
character list and confirm the selected character.
The schedule name can contain up to 15characters.
5Confirm the new name.
INFORMATION
Not all schedules can be renamed.
4.9 Weather-dependent curve
4.9.1 What is a weather-dependent curve?
Weather-dependent operation
The unit operates 'weather dependent' if the desired leaving water or
tank temperature is determined automatically by the outdoor
temperature. It therefore is connected to a temperature sensor on
the North wall of the building. If the outdoor temperature drops or
rises, the unit compensates instantly. Thus, the unit does not have to
wait for feedback by the thermostat to increase or decrease the
temperature of the leaving water or tank. Because it reacts more
quickly, it prevents high rises and drops of the indoor temperature
and water temperature at tap points.
Advantage
Weather-dependent operation reduces energy consumption.
Weather-dependent curve
To be able to compensate for differences in temperature, the unit
relies on its weather-dependent curve. This curve defines how much
the temperature of the tank or leaving water must be at different
outdoor temperatures. Because the slope of the curve depends on
local circumstances such as climate and the insulation of the house,
the curve can be adjusted by an installer or user.

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Types of weather-dependent curve
There are 2 types of weather-dependent curves:
▪ 2-points curve
▪ Slope-offset curve
Which type of curve you use to make adjustments, depends on your
personal preference. See "4.9.4 Using weather-dependent
curves"[417].
Availability
The weather-dependent curve is available for:
▪ Main zone - Heating
▪ Main zone - Cooling
▪ Additional zone - Heating
▪ Additional zone - Cooling
▪ Tank (only available to installers)
INFORMATION
To operate weather dependent, correctly configure the
setpoint of the main zone, additional zone or tank. See
"4.9.4Using weather-dependent curves"[417].
4.9.2 2-points curve
Define the weather-dependent curve with these two setpoints:
▪ Setpoint (X1, Y2)
▪ Setpoint (X2, Y1)
Example
Y1
Y2
X1 X2
a
Item Description
aSelected weather dependent zone:
▪ : Main zone or additional zone heating
▪ : Main zone or additional zone cooling
▪ : Domestic hot water
X1, X2 Examples of outdoor ambient temperature
Y1, Y2 Examples of desired tank temperature or leaving water
temperature. The icon corresponds to the heat emitter
for that zone:
▪ : Underfloor heating
▪ : Fan coil unit
▪ : Radiator
▪ : Domestic hot water tank
Possible actions on this screen
Go through the temperatures.
Change the temperature.
Go to the next temperature.
Confirm changes and proceed.
4.9.3 Slope-offset curve
Slope and offset
Define the weather-dependent curve by its slope and offset:
▪ Change the slope to differently increase or decrease the
temperature of the leaving water for different ambient
temperatures. For example, if leaving water temperature is in
general fine but at low ambient temperatures too cold, raise the
slope so that leaving water temperature is heated increasingly
more at decreasingly lower ambient temperatures.
▪ Change the offset to equally increase or decrease the
temperature of the leaving water for different ambient
temperatures. For example, if leaving water temperature is always
a bit too cold at different ambient temperatures, shift the offset up
to equally increase the leaving water temperature for all ambient
temperatures.
Examples
Weather-dependent curve when slope is selected:
X1 X2
c
d
e
Y1
Y2
Y3
Y4
a b
Weather-dependent curve when offset is selected:
Y1
Y2
Y3
Y4
X1 X2
a b
c
d
e
Item Description
aWD curve before changes.
bWD curve after changes (as example):
▪ When slope is changed, the new preferred
temperature at X1 is unequally higher than the
preferred temperature at X2.
▪ When offset is changed, the new preferred
temperature at X1 is equally higher as the preferred
temperature at X2.
cSlope
dOffset
eSelected weather dependent zone:
▪ : Main zone or additional zone heating
▪ : Main zone or additional zone cooling
▪ : Domestic hot water
X1, X2 Examples of outdoor ambient temperature

5 Energy saving tips
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Item Description
Y1, Y2,
Y3, Y4
Examples of desired tank temperature or leaving water
temperature. The icon corresponds to the heat emitter
for that zone:
▪ : Underfloor heating
▪ : Fan coil unit
▪ : Radiator
▪ : Domestic hot water tank
Possible actions on this screen
Select slope or offset.
Increase or decrease the slope/offset.
When slope is selected: set slope and go to offset.
When offset is selected: set offset.
Confirm changes and return to the submenu.
4.9.4 Using weather-dependent curves
Configure weather-dependent curves as following:
To define the setpoint mode
To use the weather-dependent curve, you need to define the correct
setpoint mode:
Go to setpoint mode … Set the setpoint mode to …
Main zone – Heating
[2.4] Main zone > Setpoint
mode
WD heating, fixed cooling
OR Weather dependent
Main zone – Cooling
[2.4] Main zone > Setpoint
mode
Weather dependent
Additional zone – Heating
[3.4] Additional zone >
Setpoint mode
WD heating, fixed cooling
OR Weather dependent
Additional zone – Cooling
[3.4] Additional zone >
Setpoint mode
Weather dependent
Tank
[5.B] Tank > Setpoint mode Restriction: Only available to
installers.
Weather dependent
To change the type of weather-dependent curve
To change the type for all zones (main + additional) and for the tank,
go to [2.E] Main zone > WD curve type.
Viewing which type is selected is also possible via:
▪ [3.C] Additional zone > WD curve type
▪ [5.E] Tank > WD curve type
Restriction: Only available to installers.
To change the weather-dependent curve
Zone Go to …
Main zone – Heating [2.5] Main zone > Heating WD
curve
Main zone – Cooling [2.6] Main zone > Cooling WD
curve
Additional zone – Heating [3.5] Additional zone >
Heating WD curve
Additional zone – Cooling [3.6] Additional zone >
Cooling WD curve
Zone Go to …
Tank Restriction: Only available to
installers.
[5.C] Tank > WD curve
INFORMATION
Maximum and minimum setpoints
You cannot configure the curve with temperatures that are
higher or lower than the set maximum and minimum
setpoints for that zone or for the tank. When the maximum
or minimum setpoint is reached, the curve flattens out.
To fine-tune the weather-dependent curve: slope-offset curve
The following table describes how to fine-tune the weather-
dependent curve of a zone or tank:
You feel … Fine-tune with slope and
offset:
At regular outdoor
temperatures …
At cold outdoor
temperatures …
Slope Offset
OK Cold ↑ —
OK Hot ↓ —
Cold OK ↓ ↑
Cold Cold — ↑
Cold Hot ↓ ↑
Hot OK ↑ ↓
Hot Cold ↑ ↓
Hot Hot — ↓
To fine-tune the weather-dependent curve: 2-points curve
The following table describes how to fine-tune the weather-
dependent curve of a zone or tank:
You feel … Fine-tune with
setpoints:
At regular outdoor
temperatures …
At cold outdoor
temperatures …
Y2(a) Y1(a) X1(a) X2(a)
OK Cold ↑ — ↑ —
OK Hot ↓ — ↓ —
Cold OK — ↑ — ↑
Cold Cold ↑ ↑ ↑ ↑
Cold Hot ↓ ↑ ↓ ↑
Hot OK — ↓ — ↓
Hot Cold ↑ ↓ ↑ ↓
Hot Hot ↓ ↓ ↓ ↓
(a) See "4.9.22-points curve"[416].
5 Energy saving tips
Tips about room temperature
▪ Make sure the desired room temperature is NEVER too high (in
heating mode) or too low (in cooling mode), but ALWAYS
according to your actual needs. Each saved degree can save up
to 6% of heating/cooling costs.
▪ Do NOT increase/decrease the desired room temperature to
speed up space heating/cooling. The space will NOT heat up/cool
down faster.
▪ When your system layout contains slow heat emitters (example:
underfloor heating), avoid large fluctuation of the desired room
temperature and do NOT let the room temperature drop too low/
rise too high. It will take more time and energy to heat up/cool
down the room again.

6 Maintenance and service
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▪ Use a weekly schedule for your normal space heating or cooling
needs. If necessary, you can easily deviate from the schedule:
▪ For shorter periods: You can overrule the scheduled room
temperature until the next scheduled action. Example: When
you have a party, or when you are leaving for a couple of hours.
▪ For longer periods: You can use the holiday mode.
Tips about DHWtank temperature
▪ Use a weekly schedule for your normal domestic hot water needs
(ONLY in scheduled mode).
▪ Program to heat up the DHWtank to a preset value (Comfort =
higher DHWtank temperature) during the night, because then
space heating demand is lower.
▪ If heating up the DHW tank once at night is NOT sufficient,
program to additionally heat up the DHWtank to a preset value
(Eco = lower DHWtank temperature) during the day.
▪ Make sure the desired DHW tank temperature is NOT too high.
Example: After installation, lower the DHWtank temperature daily
by 1°C and check if you still have enough hot water.
▪ Program to turn ON the domestic hot water pump ONLY during
periods of the day when instant hot water is necessary. Example:
In the morning and evening.
6 Maintenance and service
6.1 Overview: Maintenance and
service
The installer has to perform a yearly maintenance. You can find the
contact/helpdesk number via the user interface.
1Go to [8.3]: Information > Dealer information.
As enduser, you have to:
▪ Keep the area around the unit clean.
▪ Keep the user interface clean with a soft damp cloth. Do NOT use
any detergents.
▪ Regularly check if the water pressure is above 1bar.
Refrigerant
This product contains fluorinated greenhouse gases. Do NOT vent
gases into the atmosphere.
Refrigerant type: R32
Global warming potential (GWP) value: 675
NOTICE
Applicable legislation on fluorinated greenhouse gases
requires that the refrigerant charge of the unit is indicated
both in weight and CO2 equivalent.
Formula to calculate the quantity in CO2 equivalent
tonnes: GWP value of the refrigerant × total refrigerant
charge [in kg] / 1000
Please contact your installer for more information.
WARNING: FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
WARNING
▪ Do NOT pierce or burn refrigerant cycle parts.
▪ Do NOT use cleaning materials or means to accelerate
the defrosting process other than those recommended
by the manufacturer.
▪ Be aware that the refrigerant inside the system is
odourless.
WARNING
The refrigerant inside the unit is mildly flammable, but
normally does NOT leak. If the refrigerant leaks in the
room and comes in contact with fire from a burner, a
heater, or a cooker, this may result in fire, or the formation
of a harmful gas.
Turn off any combustible heating devices, ventilate the
room, and contact the dealer where you purchased the
unit.
Do NOT use the unit until a service person confirms that
the part from which the refrigerant leaked has been
repaired.
7 Troubleshooting
Contact
For the symptoms listed below, you can try to solve the problem
yourself. For any other problem, contact your installer. You can find
the contact/helpdesk number via the user interface.
1Go to [8.3]: Information > Dealer information.
7.1 To display the help text in case of a
malfunction
In case of a malfunction, the following will appear on the home
screen depending on the severity:
▪ : Error
▪ : Malfunction
You can get a short and a long description of the malfunction as
follows:
1Press the left dial to open the main menu and go to
Malfunctioning.
Result: A short description of the error and the error
code is displayed on the screen.
2Press in the error screen.
Result: A long description of the error is displayed
on the screen.
7.2 To check the malfunction history
Conditions: The user permission level is set to advanced end user.
1Go to [8.2]: Information > Malfunction history.
You see a list of the most recent malfunctions.

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7.3 Symptom: You are feeling too cold
(hot) in your living room
Possible cause Corrective action
The desired room temperature is
too low (high).
Increase (decrease) the desired
room temperature. See "4.6.2To
change the desired room
temperature"[412].
If the problem recurs daily, do
one of the following:
▪ Increase (decrease) the room
temperature preset value. See
the user reference guide.
▪ Adjust the room temperature
schedule. See "4.8 Schedule
screen: Example"[414].
The desired room temperature
cannot be reached.
Increase the desired leaving
water temperature in accordance
with the heat emitter type. See
"4.6.3To change the desired
leaving water temperature"[412].
The weather-dependent curve is
set incorrectly.
Adjust the weather-dependent
curve. See "4.9Weather-
dependent curve"[415].
7.4 Symptom: The water at the tap is
too cold
Possible cause Corrective action
You ran out of domestic hot
water because of unusual high
consumption.
If you immediately need domestic
hot water, activate the DHW tank
Powerful operation. However,
this consumes extra energy. See
"4.7.4Using DHW powerful
operation"[413].
If the problems recurs daily, do
one of the following:
▪ Increase the DHW tank
temperature preset value. See
the user reference guide.
▪ Adjust the DHW tank
temperature schedule.
Example: Program to
additionally heat up the
DHW tank to a preset value
(Eco setpoint = lower tank
temperature) during the day.
See "4.8 Schedule screen:
Example"[414].
The desired DHWtank
temperature is too low.
7.5 Symptom: Heat pump failure
When the heat pump fails to operate, the backup heater and/or
booster heater can serve as an emergency heater. It then takes over
the heat load either automatically or by manual interaction.
▪ When Emergency is set to Automatic and a heat pump failure
occurs:
▪ For ETVH/X: The backup heater automatically takes over the
domestic hot water production and space heating.
▪ For ETBH/X: The backup heater automatically takes over the
heat load, and the booster heater in the optional tank takes over
the domestic hot water production.
▪ When Emergency is set to Manual and a heat pump failure
occurs, the domestic hot water heating and space heating stops.
To manually recover it via the user interface, go to the
Malfunctioning main menu screen and confirm whether the
backup heater and/or booster heater can take over the heat load
or not.
▪ Alternatively, when Emergency is set to:
▪auto SH reduced/DHW on, space heating is reduced but
domestic hot water is still available.
▪auto SH reduced/DHW off, space heating is reduced and
domestic hot water is NOT available.
▪auto SH normal/DHW off, space heating operates as
normally but domestic hot water is NOT available.
Similarly as in Manual mode, the unit can take the full load with
the backup heater and/or booster heater if the user activates this
via the Malfunctioning main menu screen.
When the heat pump fails, or will appear on the user
interface.
Possible cause Corrective action
Heat pump is damaged. See "7.1To display the help text
in case of a malfunction"[418].
INFORMATION
When the backup heater or booster heater takes over the
heat load, electricity consumption will be considerably
higher.
7.6 Symptom: The system is making
gurgling noises after
commissioning
Possible cause Corrective action
There is air in the system. Purge air from the system.(a)
Incorrect hydraulic balance. To be performed by the installer:
1 Perform hydraulic balancing
to assure that the flow is
correctly distributed
between the emitters.
2 If hydraulic balancing is not
sufficient, change the pump
limitation settings ([9-0D]
and [9-0E] if applicable).
Various malfunctions. Check if or is displayed
on the home screen of the user
interface. See "7.1To display the
help text in case of a
malfunction"[418] for more
information about the
malfunction.
(a) We recommend to purge air with the air purge function of the unit
(to be performed by the installer). If you purge air from the heat
emitters or collectors, mind the following:

8 Disposal
Operation manual
20
ETVH/X12S18+23EA6V+9W + ETBH/X12EF6V+9W
Daikin Altherma 3 H MT F+W
4P634883-1 – 2021.03
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.
8 Disposal
NOTICE
Do NOT try to dismantle the system yourself: dismantling
of the system, treatment of the refrigerant, oil and other
parts MUST comply with applicable legislation. Units
MUST be treated at a specialised treatment facility for
reuse, recycling and recovery.
9 Glossary
DHW = Domestic hot water
Hot water used, in any type of building, for domestic
purposes.
LWT = Leaving water temperature
Water temperature at the water outlet of the unit.