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Depending on the system layout, the system can:
Cooling is only applicable in case of reversible models.
If underfloor heating is installed in the main zone, then in cooling mode the main zone can only provide refreshment. Real cooling is then NOT allowed.
The amount of information you can read and edit in the menu structure depends on your user permission level:
1 | ![]() | ![]() |
2 | Enter the applicable pin code for the user permission level. | — |
| ![]() | |
| ![]() | |
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The User pin code is 0000.
The Advanced user pin code is 1234. Additional menu items for the user are now visible.
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.
1 | Go to [C.2]: Operation > Space heating/cooling.![]() | ![]() |
2 | Set operation to On or Off. | ![]() |
During room temperature control, you can use the room temperature setpoint screen to read out and adjust the desired room temperature.
1 | Go to [1]: Room.![]() | ![]() |
2. | Adjust the desired room temperature![]()
| ![]() |
You can use the leaving water temperature setpoint screen to read out and adjust the desired leaving water temperature.
1 | Go to [2]: Main zone or [3]: Additional zone.![]() | ![]() |
2 | Adjust the desired leaving water temperature. ![]()
| ![]() |
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 |
X1, X2 Outdoor ambient temperature
Y1~Y4 Desired leaving water temperature
a WD curve before changes
b WD curve after changes
c Slope
d Offset
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. |
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. |
For more information, see also:
NOTICE
To ensure safe operation of the system, do NOT turn off DHW when space heating is required.
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.
1 | Go to [C.3]: Operation > Tank.![]() | ![]() |
2 | Set operation to On or Off. | ![]() |
In Reheat only mode, you can use the tank temperature setpoint screen to read out and adjust the storage tank temperature. The resulting domestic hot water temperature depends on this setpoint as well as the actual storage tank temperature.
1 | Go to [5]: Tank.![]() | ![]() |
2 | Adjust the domestic hot water temperature![]()
| ![]() |
In other modes, you can only view the setpoint screen but not modify it.
For more information, see also:
Cooling is only applicable in case of reversible models.
The user interface has the following components:
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 "To display the help text in case of a malfunction" for more information. |
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.
You use the dials and buttons:
Item | Description | |
a | Left dial | The LCD shows an arc on the left side of the display when you can use the left dial.
|
b | Back button | ![]() |
c | Home button | ![]() |
d | Help button | ![]() |
e | Right dial | The LCD shows an arc on the right side of the display when you can use the right dial.
|
Setpoint screen
(*) Only applicable for models where cooling is possible
(**) Only accessible by installer
(***) Only applicable when WLAN is installed
Depending on the selected installer settings and unit type, settings will be visible/invisible.
The most common screens are as follows:
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.
Possible actions on this screen | ||||
![]() | Go through the list of the main menu. | |||
![]() | Go to the main menu screen. | |||
![]() | Enable/disable breadcrumbs. |
(a) If the corresponding operation (for example: space heating) is not active, the circle is greyed out.
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.
Possible actions on this screen | |
![]() | Go through the list. |
![]() | Enter the submenu. |
![]() | Enable/disable breadcrumbs. |
The setpoint screen is displayed for screens describing system components that need a setpoint value.
Examples
[1] Room temperature screen
[2] Main zone screen
[3] Additional zone screen
[4] Tank temperature screen
Explanation
Possible actions on this screen | |||||
![]() | Go through the list of the submenu. | ||||
![]() | Go to the submenu. | ||||
![]() | Adjust and automatically apply the desired temperature. | ||||
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 | c | Measured by the unit | |||
Desired temperature | d | Turn the right dial to increase/decrease. | |||
Submenu | e | Turn or press the left dial to go to the submenu. |
Example:
Possible actions on this screen | |
![]() | Go through the list of settings. |
![]() | Change the value. |
![]() | Go to the next setting. |
![]() | Confirm changes and proceed. |
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
Tank heating operation
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.
1 | Go to [C.2]: Operation > Space heating/cooling.![]() | ![]() |
2 | Set operation to On or Off. | ![]() |
Tank heating operation
NOTICE
To ensure safe operation of the system, do NOT turn off DHW when space heating is required.
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.
1 | Go to [C.3]: Operation > Tank.![]() | ![]() |
2 | Set operation to On or Off. | ![]() |
1 | Go to [8]: Information. | ![]() |
In menu... | You can read out... |
[8.1] Energy data | Produced energy, consumed electricity, and consumed gas, energy flow diagram |
[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 |
[8.B] Piping diagram | Real-time sensor and actuator information of the main system components |
About space operation modes
Your unit can be a heating or a heating/cooling model:
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
1 | Go to [4.1]: Space heating/cooling > Operation mode | ![]() |
2 | Select one of the following options:
| ![]() |
To restrict automatic changeover according to a schedule Conditions: You set the space operation mode to Automatic.
1 | Go to [4.2]: Space heating/cooling > Operation mode schedule. | ![]() |
2 | Select a month. | ![]() |
3 | For each month, select an option:
| ![]() |
4 | Confirm the changes. | ![]() |
During room temperature control, you can use the room temperature setpoint screen to read out and adjust the desired room temperature.
1 | Go to [1]: Room.![]() | ![]() |
2 | Adjust the desired room temperature.![]()
| ![]() |
If scheduling is on after changing the desired room temperature
You can avoid scheduled behaviour by (temporarily) turning off scheduling.
To turn off room temperature scheduling
1 | Go to [1.1]: Room > Schedule. | ![]() |
2 | Select No. | ![]() |
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.
1 | Go to [2]: Main zone or [3]: Additional zone.![]() | ![]() | |
2 | Adjust the desired leaving water temperature.![]()
| ![]() |
In reheat mode the storage tank continuously heats up to the temperature shown on the home screen (example: 50°C) when the temperature drops below a certain value.
Tt Storage tank temperature
t Time
Risk of space heating capacity shortage: In case of frequent tank operation, frequent and long space heating/ cooling interruption will happen when selecting the following:
Tank > Heat up mode > Reheat only.
In scheduled reheat mode the storage tank set temperature varies according to the schedule. When the tank temperature drops below the set temperature minus the heat pump ON hysteresis temperature [6-00], the tank heats up to the reheat temperature.
Example:
Tt Storage tank temperature
t Time
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.
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:
1 | Go to [5.1]: Tank > Powerful operation | ![]() |
2 | Turn powerful operation Off or On. | ![]() |
Usage example: You immediately need more hot water
You are in the following situation:
Then you can activate powerful operation. The domestic hot water tank will start heating up the water to the tank temperature setpoint.
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.
This example shows how to set a room temperature schedule in heating mode for the main zone.
The procedures to program other schedules are similar.
To program the schedule: overview
Example: You want to program the following schedule:
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.
1 | Go to [1.1]: Room > Schedule. | ![]() |
2 | Set scheduling to Yes. | ![]() |
3 | Go to [1.2]: Room > Heating schedule. | ![]() |
To clear the content of the week schedule
1 | Select the name of the current schedule.![]() | ![]() |
2 | Select Delete.![]() | ![]() |
3 | Select OK to confirm. | ![]() |
To clear the content of a day schedule
1 | Select the day of which you want to clear the content. For example Friday![]() | ![]() |
2 | Select Delete.![]() | ![]() |
3 | Select OK to confirm. | ![]() |
To program the schedule for Monday
1 | Select Monday.![]() | ![]() |
2 | Select Edit.![]() | ![]() |
3 | Use 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.
| ![]() |
4 | Confirm 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. | ![]() |
To copy the schedule to the other weekdays
1 | Select Monday.![]() | ![]() |
2 | Select Copy. Result: Next to the copied day, "C" is displayed. | ![]() |
3 | Select Tuesday.![]() | ![]() |
4 | Select Paste.![]() Result: ![]() | ![]() |
5 | Repeat this action for all other weekdays.![]() | - |
To program the schedule for Saturday and copy it to Sunday
To rename the schedule
1 | Select the name of the current schedule.![]() | ![]() |
2 | Select Rename.![]() | ![]() |
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. | ![]() |
4 | To name the current schedule, browse through the character list and confirm the selected character. The schedule name can contain up to 15 characters. | ![]() |
5 | Confirm the new name. | ![]() |
Not all schedules can be renamed.
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 building, the curve can be adjusted by an installer or user.
Types of weather-dependent curve
There are 2 types of weather-dependent curves:
Which type of curve you use to make adjustments, depends on your personal preference. See "Using weather-dependent curves".
Availability
The weather-dependent curve is available for:
To operate weather dependent, correctly configure the setpoint of the main zone, additional zone or tank. See "Using weather-dependent curves".
Define the weather-dependent curve with these two setpoints:
Example
a | Selected weather dependent zone:
|
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:
|
Possible actions on this screen:
![]() | Go through the temperatures. | |
![]() | Change the temperature. | |
![]() | Go to the next temperature. | |
![]() | Confirm changes and proceed. |
Slope and offset
Define the weather-dependent curve by its slope and offset:
Examples
Weather-dependent curve when slope is selected:
Weather-dependent curve when offset is selected:
Item | Description |
a | WD curve before changes. |
b | WD curve after changes (as example):
|
c | Slope |
d | Offset |
e | Selected weather dependent zone:
|
X1, X2 | Examples of outdoor ambient temperature |
Y1, Y2, Y3, Y4 | Examples of desired tank temperature or leaving water temperature. The icon corresponds to the heat emitter for that zone:
|
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. |
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:
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 |
Tank | Restriction: Only available to installers. [5.C] Tank > WD curve |
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 "2-points curve".
The installer has to perform a yearly maintenance. You can find the contact/helpdesk number via the user interface.
1 | Go to [8.3]: Information > Dealer information. | ![]() |
As end user, you have to:
Refrigerant
This product contains fluorinated greenhouse gases. Do NOT vent gases into the atmosphere.
Refrigerant type: R32
Global warming potential (GWP) value: 675
Periodical inspections for refrigerant leaks may be required depending on the applicable legislation. Contact your installer for more information.
FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
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
Contact your installer for more information.
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.
1 | Go to [8.3]: Information > Dealer information. | ![]() |
In case of a malfunction, the following will appear on the home screen depending on the severity:
You can get a short and a long description of the malfunction as follows:
1 | Press 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. | ![]() |
2 | Press ![]() Result: A long description of the error is displayed on the screen. | ![]() |
Conditions: The user permission level is set to advanced end user.
1 | Go to [8.2]: Information > Malfunction history. | ![]() |
You see a list of the most recent malfunctions.
Possible cause | Corrective action |
The desired room temperature is too low (high). | Increase (decrease) the desired room temperature. See "To change the desired room temperature". If the problem recurs daily, do one of the following:
|
The desired room temperature cannot be reached. | Increase the desired leaving water temperature in accordance with the heat emitter type. See "To change the desired leaving water temperature". |
The weather-dependent curve is set incorrectly. | Adjust the weather-dependent curve. See "Weather-dependent curve". |
Possible cause | Corrective action |
You ran out of domestic hot water because of unusually high consumption. | If you immediately need domestic hot water, activate the tank Powerful operation. However, this consumes extra energy. See "Using DHW powerful operation". If the problems recurs daily, do one of the following:
|
The desired storage tank temperature is too low. |
When the heat pump fails to operate, the backup heater or boiler can serve as an emergency heater. It then takes over the heat load either automatically or by manual interaction.
Similarly as in Manual mode, the unit can take the full load with the backup heater or boiler 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 "To display the help text in case of a malfunction". |
When the backup heater takes over the heat load, electricity consumption will be considerably higher.
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:
|
Various malfunctions. | Check if ![]() ![]() |
(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:
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.
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.
Setting | Fill in... |
Main zone | |
| |
Additional zone (if applicable) | |
| |
Information | |
|
Always observe the following safety instructions and regulations.
If you are NOT sure how to operate the unit, contact your installer.
This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved.
Children SHALL NOT play with the appliance.
Cleaning and user maintenance SHALL NOT be made by children without supervision.
To prevent electrical shocks or fire:
MILDLY FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
The appliance shall be stored so as to prevent mechanical damage and in a well-ventilated room without continuously operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater).
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.
Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.
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