Thermia Atlas User manual

User Guide
Atlas & Calibra
www.thermia.com

The English language is used for the original instructions.
Other languages are a translation of the original instructions.
(Directive 2006/42/EC)
© Copyright Thermia AB

Table of Contents
1 Foreword ............................................... 4
2Common settings .......................................... 5
2.1 Common settings ...................................... 5
3Safety precautions ......................................... 7
3.1 Important information .................................... 7
3.2 Installation and maintenance ................................ 7
4About your heat pump ....................................... 9
4.1 Product description ..................................... 9
5Control system ........................................... 10
6 Settings and adjustments ..................................... 11
6.1 Adjusting the indoor temperature ............................. 11
6.2 Introduction to more advanced heat settings ....................... 11
6.3 Adjusting the Heat Curve .................................. 13
6.4 Heating Settings ....................................... 13
6.5 Selecting operating mode .................................. 14
6.6 System information ..................................... 15
7 Default settings in the control unit ............................... 16
8 Regular checks ........................................... 17
8.1 Check the water level in the heating circuit ........................ 17
8.2 Checking safety valves .................................... 17
8.3 In the event of leakage .................................... 17
8.4 Cleaning the filters for the heating and brine circuits .................. 17
9 Alarms ................................................ 19
9.1 Alarms ............................................. 19
10 Appendix ............................................... 21
10.1 Display symbol description ................................. 21
10.2 Calculating heat production ................................ 23
10.3 Comfort settings ....................................... 23
10.4 Heat curve ........................................... 24
10.5 Heating Settings ....................................... 27
11 Online ................................................. 28
11.1 Online ............................................. 28
12 Accessories .............................................. 29
12.1 Accessories .......................................... 29
13 Checklist ............................................... 30
14 Installation carried out by: .................................... 31
User Guide Atlas & Calibra
Thermia AB BWCA01UG0202 3

1 Foreword
Buying a heat pump from Thermia is an investment in a better future.
A Thermia heat pump is classed as a renewable energy source, which means that it is considerate of our envi-
ronment. It is a safe and convenient solution that provides heating, hot water and, in certain cases, cooling for
your home at a low cost.
We thank you for the confidence that you have shown in us by buying a heat pump from Thermia . We hope
that you will benefit from it for many, many years to come.
With best wishes
Thermia heat pumps
User Guide Atlas & Calibra
BWCA01UG0202 Thermia AB
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2 Common settings
2.1 Common settings
Below is a summary of the most common settings you may need to make as owner of this heat pump. If the
screen saver is active, simply press the screen to proceed.
▪Adjusting the indoor temperature
Adjusting the indoor temperature is easy.
11:20
20 ˚C
Press to increase the indoor temperature or to decrease the indoor temperature.
One step up or down will affect the indoor temperature with approximately 1 °C. This is the easiest way to ad-
just the heating.
Observe that the effect of the adjustment takes up to approximately 24 hours to be noticable, depending on
the heating system and insulation of the building etc.
For more advanced settings and information, please refer to the Heat curve chapter.
▪Thermia Online
With Thermia Online you can control and monitor your heat pump via any smart phone, computer or tablet.
Visit https://www.online-genesis.thermia.se to create an account. For smart phone or tablet, please download
the application.
▪Display notifications
The heat pump is equipped with automatic functional surveillance in the controller in order to give the heat
pump a long lifetime with as reliable and efficient running as possible. If the heat pump detects that something
may need attention, this will be presented as a so called "alarm" in the display. See the Alarms chapter for fur-
ther information.
▪Tap water
In tap water settings you may choose from 3 different hot water modes depending on your preferences:
Economy mode: Can be used as default mode to get the most energy efficient hot water production when the
demands on hot water capacity is expected low. This setting will give the most efficient hot water production,
but also a lower hot water capacity and longer recharge times compared to the other modes.
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Thermia AB BWCA01UG0202 5

Normal mode: Often a good setting for normal families and is optimized to give a very good compromise be-
tween comfort and economy giving a high amount of available hot water, but also a low energy consumption.
Comfort mode: Will give shortest recharge times and highest hot water capacity, but with a somewhat lower
efficiency and a slightly increased sound level.
Boost button: By pressing the "Boost" button you can trigger an extra (onetime) hot water production includ-
ing the use of the electrical top up heater, giving the possibility of an increased amount of hot water for special
occasions.
Note - Hot water production should normally never be deactivated, as this could cause harmful bacterial
growth inside the hot water tank.
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3 Safety precautions
3.1 Important information
Warning This appliance can be used by children aged 8
years and above, and by persons with reduced
physical, sensory or mental capabilities or lack
of experience or knowledge, provided that
they are supervised or have been instructed in
the safe use of the appliance and understand
the hazards involved.
Cleaning and user maintenance must not be
carried out by children, except under adult su-
pervision.
Warning Children are not permitted to play with the
product.
The system can be considered maintenance-free but certain checks are necessary.
Contact your installer for any service work.
The front of the heat pump must only be opened by qualified installers.
3.2 Installation and maintenance
Only qualified installers may install, operate and carry out maintenance and repair work on the heat
pump.
Due to safety regulations, only qualified electricians may modify the electrical installation and only qualified
refrigeration technicians may work on the refrigerant circuit.
This applies to modifications on the following components:
▪The heat pump unit
▪The pipes for the refrigerant, brine and water
▪The power supply
▪The safety valves
It is not permitted to carry out construction installations that may affect the operational safety of the heat
pump.
Make sure to never block the connection to the safety valves' overflow pipes.
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Thermia AB BWCA01UG0202 7

The following safety precautions apply to the hot water circuit’s safety valve with corresponding overflow pipe:
▪Water expands when it is heated, which means that a small amount of water is released from the system
via the overflow pipe.
▪The water that exits the overflow pipe can be hot!
Therefore, allow it to flow to a floor drain to prevent any risk of burning yourself.
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4 About your heat pump
4.1 Product description
This heat pump is a heating system for both heating and hot water production. It has a compressor which is
customised for heat pumps.
The heat pump is equipped with control equipment which is presented in a graphic display. The heat pump is
also prepared for monitoring via the internet.
Heating is provided to the building via a water-borne heating system. The heat pump supplies as much of the
heat demand as possible before auxiliary heating is engaged to assist.
The heating unit consists of two basic components:
Heat pump unit
The heat pump also consists of:
▪Variable speed scroll compressor controlled by frequency converter
▪Stainless steel heat exchangers
▪Circulation pumps for collector system and heating system
▪Electronic expansion valves and pressure transmitters for surveillance of the refrigerant circuit
▪Inbuilt stainless water heater
▪Internal immersion heater
▪The Duo heat pump has a separate water heater. The temperature in the water heater is controlled by the
lower and top temperature sensors.
▪If you have the Atlas model with HGW you can achieve higher amount of hot water.
Control equipment
The control equipment controls the incoming components of the heating appliance (compressor, circulation
pumps, auxiliary heating, exchange valves and external functions available as accessories, if installed) and
keeps track of when the pump should start and stop, as well as whether it should produce heating or hot water.
The control equipment consists of:
▪Colour touch screen and relay module
▪Temperature sensors (outdoor, supply line, return line, brine and hot water)
▪Frequency converter and sensors in the heat pump's refrigerant circuit
User Guide Atlas & Calibra
Thermia AB BWCA01UG0202 9

5 Control system
The heat pump has an integrated control system which automatically calculates the heat demand in the build-
ing to ensure that the correct amount of heat is produced and emitted when necessary.
A touch screen is connected to the control system.
The display is used for:
▪making settings such as:
▪setting heating
▪adjusting the heat curve
▪displaying operating data such as:
▪temperatures
▪operating time
▪version information
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6 Settings and adjustments
A qualified installer sets the heat pump's basic settings upon installation. The adjustments that may be made
by the end user are described below.
Sometimes no settings are needed at all.
Never change control unit settings unless you are aware of what effects the changes may have. Make a note of
the default setting and know that some changes may take some time to take effect due to the nature of a heat-
ing system.
6.1 Adjusting the indoor temperature
Comfort adjustment, to change temperature
On the start screen, "comfort adjustment" of the indoor temperature may be done very easily.
11:20
20 ˚C
Press or , alternatively drag clockwise or anticlockwise to
raise or lower the temperature.
Each step represents an increase/decrease of approximately 1°C of the
indoor temperature.
General advice: If the temperature is perceived as too high, it is normally highly recommended to change the
setting on the heat pump instead of adjusting down/closing the radiator thermostats and similar. Adjusting the
settings on the heat pump will in most cases enable a more efficient and smooth running.
If regular adjustments on the comfort adjustment are required to keep the indoor temperature stable when the
outdoor temperature changes, this may indicate that the so called heat curve (more advanced setting) should
be adjusted.
See Comfort Settings in the Appendix for details.
6.2 Introduction to more advanced heat settings
Introduction to more advanced heat settings
If the easy temperature changes made on the "comfort wheel" are not perceived as sufficient or the
temperature inside the house changes when the out door temperature changes, more advanced settings and
adjustments are available in the controller. This is a little bit more complicated, why a general introduction to
this follows below.
Heating system
In your heating system, water is constantly circulating from the heat pump through radiators or floor heating
and back again to provide heating to the building, except during summer when there is no need for heating .
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Heat curve & supply line temperature
The heat pump is automatically calculating how much heat it has to produce to keep a comfortable indoor
climate based on the measured outdoor temperature and the settings made on the so called "heat curve" in
the heat pump display.
The temperature of the water supplied from the heat pump to the heating system is called "supply line temper-
ature" as it is the temperature that is supplied from the heat pump to the heating system.
The supply line temperature needs to be increased when the outdoor temperatures gets lower because more
heat is required from the heating system when it gets colder outside to keep the same indoor temperature.
This is what the "heat curve" makes sure.
The heat curve settings are normally adjusted by the heat pump installer, but fine tuning to the specific house
conditions and individual preferences may be required after some time to obtain desired indoor climate in all
weather conditions.
A correctly set heat curve saves energy, gives a very good indoor climate and often also reduces the need of
maintenance.
General guidance:
In order to increase the indoor temperature with 1 degree, the supply line temperature should often be in-
creased by 3 °C in radiator systems and 2 °C in floor heating systems.
(To decrease indoor temperatures, lower the temperatur settings correspondingly.)
When the heat curve is set properly, the comfort adjustment will work as a quick adjustment to increase/
decrease the indoor temperature, affecting the indoor temperature with approx 1 °C / step.
For furter information. See appendix.
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6.3 Adjusting the Heat Curve
The heat curve is a more advanced and complicated way to adjust the heating compared to the comfort adjust-
ment available on the first page, but also gives very good possibilities for fine tuning the heating settings to get
desired indoor climate also when the outdoor temperature changes.
If you are not familiar with how the heat curve is working, it may be good to start by reading the Heat curve
chapter in the Appendix, in this manual.
11:20
20
17 10 5 0 -5 -15 -25
40
80
60
21
29 34
40 44
+1 51
59
Auto
supply line (˚C)
outdoor (˚C)
1. Press on the Start screen to open the Menu screen.
2. Press
3. Press if the Heat curve is not shown.
4. There are two ways of adjusting the heat curve:
▪If the Curve indicator
40
is lit, press or to adjust the
entire curve.
Or:
▪If the Curve indicator
40
is not lit individual points can be
moved separately by pressing the desired individual point
and pressing and to the desired temperature.
5. Confirm the new selection by pressing
6.4 Heating Settings
In Heating settings, you can set seasonal stop and min/max supply line temperature.
1. Press on the Start screen to open the Menu screen.
2. Press
3. Press if the Heat settings window is not shown.
4. Make the desired changes.
5. Confirm settings by pressing .
Adjusting the minimum and maximum supply temperatures is particularly important if your home has under
floor heating.
If your house has floor heating, the supply line temperature must not exceed the values recommended by the
floor manufacturer. Otherwise the floor might get damaged.
For more information, see Heating Settings in the Appendix.
Note: Heating should normally never be de-activated, as this could cause freezing and property damage.
User Guide Atlas & Calibra
Thermia AB BWCA01UG0202 13

6.5 Selecting operating mode
Set the heat pump to the desired operating mode in the menu:
1. Press on the Start screen to open the Menu screen.
2. Press . A new window opens.
3. Press the appropriate symbol for the desired operating mode.
If the compressor has been in operation for the past 20 minutes, so-called restriction time may occur tem-
porarily preventing the heat pump from starting.
Symbol Description
Operating mode Off.
All functions are off. Components inside the heat pump are
still current carrying.
The heat pump will not produce any heating or hot water.
Risk of freezing!
Operating mode Auxiliary heater only.
Compressor is off, but by factory default the unit can produce
heating and hot water with the internal immersion heater, in
case of certain alarms, and/or during installation and commis-
sioning of the heat pump. External functions are on. This oper-
ating mode will increase the energy consumption compared
to " Auto" mode.
Operating mode On/Auto
All activated functions are on. By factory default, heating and
hot water is produced. Compressor and internal immersion
heater are controlled automatically.
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6.6 System information
Check applicable operating data described in the tables below. The information can be found in the sub-menu
System information
Select System information on the Menu screen:
1. Press on the Start screen to open the Menu screen.
2. Press System information .
Operating data
Sensor Explanation
Outdoor Shows the temperature on the outdoor sensor.
System supply line Optional. Depending on system application.
Desired supply line Shows the calculated requirement value for the supply line.
Hot water Shows the temperature of the hot water sensor, if hot water production is
permitted.
Supply line (HP) Shows temperature of outgoing radiator temperature from heat pump.
Return line (HP) Shows temperature of incoming radiator temperature to heat pump.
Brine in Shows the current temperature of brine in to the heat pump.
Brine out Shows the current temperature of brine out from the heat pump.
Operating time
Explanation
Compressor run time Shows the number of hours that the compressor has been in operation.
Tap water run time Shows the number of hours that has been used for hot water production.
External heater run time Shows the number of hours that the external heater has been activated.
Internal immersion heater
step 1 Shows the number of hours that the immersion heater step 1 has been in operation.
Internal immersion heater
step 2 Shows the number of hours that the immersion heater step 2 has been in operation.
Internal immersion heater
step 3 Shows the number of hours that the immersion heater step 3 has been in operation.
Version information
In the menu Operating data, version information about the control system software is shown.
This information is useful when contacting support.
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Thermia AB BWCA01UG0202 15

7 Default settings in the control unit
The left column in the table below shows the parameters that can be adjusted by the user.
The middle column shows the factory settings.
The right column shows the settings made by the installer when the heat pump was installed
Parameter Factory setting Any customer-specific settings
Heat curve 40°C
Min desired system
supply temp. 20°C
Max desired system
supply temp. 60°C
Seasonal stop 17°C
User Guide Atlas & Calibra
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8 Regular checks
8.1 Check the water level in the heating circuit
The system pressure of the installation must be checked at least twice per year. Ensure that the heating system
has the necessary pressure, according to the installers advice, but never more than 3 bar.
You can often use normal tap water when topping up the heating system. In certain exceptional cases the wa-
ter quality may be unsuitable for filling the heating system (corrosive or calciferous water).
In case of doubt, contact your installer.
Do not use any additives for treatment of the water in the heating system, unless you have a written consent
from Thermia!
8.2 Checking safety valves
The safety valves for the installation should be checked at least four times per year to prevent lime deposits
clogging the mechanism.
The safety valve of the water tank protects the enclosed heater against over pressure. It is mounted on the cold
water inlet line. If the safety valve is not checked regularly, there is a risk that the water tank may sustain dam-
age. It is quite normal for the safety valve to let out small amounts of water when the water tank is being charg-
ed, especially if a lot of hot water was used previously.
The safety valves can be checked by turning the cap a quarter of a turn clockwise until water comes out of the
overflow pipe. If a safety valve does not work properly, it must be replaced. Contact your installer.
The opening pressure of the safety valves is not adjustable.
Make sure to never ever block the connection to the safety valves' overflow pipes. Any excessive pressure must
always be able to escape.
8.3 In the event of leakage
In the event of leakage in the hot water pipes between the heat pump and water taps, close the shut-off valve
on the cold water inlet immediately. Then contact your installer.
In the event of leakage in the brine circuit, turn off the heat pump and call your installer immediately.
8.4 Cleaning the filters for the heating and brine circuits
Contact your installer if you are not sure how to perform the filter cleaning.
The heat pump must be switched off during this maintenance. First turn it off from the Operating mode page,
wait a few minutes to make sure it shuts down properly, then turn off the the main switch before cleaning can
be started.
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Thermia AB BWCA01UG0202 17

The cleaning of filters may cause air ingress to the brine or heating system that may cause operational distur-
bances. For cleaning magnetite filters, please refer to the filter manufacturers instructions.
Check and clean the filters at least twice the first year after installation. The interval can be extended if there is
evidence that cleaning twice a year is not necessary.
Have a cloth at hand when opening the filter cover as a small amount of water usually escapes.
A
DCB
A Shut-off tap
B Cover
C Filter
D O-ring
Clean the filter as follows:
1. Switch off the heat pump.
2. Turn the shut-off tap (A) to the closed position.
3. Unscrew the cover (B) and remove it.
4. Remove the filter.
5. Rinse the filter (C).
6. Reinstall the filter.
7. Check that the O-ring (D) on the cover is not damaged.
8. Screw the cover back into place.
9. Turn the shut-off tap to the open position.
10. Start the heat pump.
For the brine circuit filter, please contact your installer for advice.
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9 Alarms
9.1 Alarms
If the display shows a screen saver, and no warning triangle is shown on the start page, the system is OK and no
actions are required.
The heat pump is equipped with automatic functional surveillance in the controller in order to give the heat
pump a long lifetime with as reliable and efficient running as possible. If the heat pump detects that something
may need attention, this will be presented as a so called "alarm" in the display.
There are different types of alarms:
▪Class A: Stops the heat pump. The alarm must be acknowledged.
The display shows a red screen saver.
▪Class B: Does not stop the heat pump. The alarm must be acknowledged.
The display shows a yellow screen saver.
▪Class C: Temporary functional deviation, no action required. Does not stop the heat pump.
The alarm is self-acknowledging.
The display shows a green screen saver during the functional deviation.
If an A-alarm is active, the heat pump's compressor is disabled, and the hot water production will stop. This is to
draw attention to the fact that there is an alarm that must be resolved before the heat pump can regain normal
functionality.
The immersion heater will automatically be used for space heating during an A-alarm that is blocking the com-
pressor. If the A-alarm can not be re-set or reoccurs, tap water heating can also be reactivated by switching the
operating mode to "Auxiliary heater only". This mode can also be used in an installation phase, before the brine
circuit is connected to the heat pump.
Have in mind that heating the house and the tap water tank of the heat pump with the immersion heater only,
can be costly if done over a longer period of time, and is not recommended as a long term solution.
The following symbol is shown during screen saver mode and on the start screen when there is a Class A-alarm
active (yellow for Class B): . Press it to go to the alarms menu, showing information on what alarm has
been triggered.
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Example of alarm messages:
Message Meaning / Class Corrective action
High pressure The heating circuit is the heat
pump's high pressure circuit.
Class A
Check and, if necessary, rectify the level of the cir-
cuit. Acknowledge the alarm as described below.
Low pressure The brine circuit is the heat
pump's low pressure circuit.
Class A
Check the circuit's level. Acknowledge the alarm as
described below.
Contact a service technician if the alarm reoccurs.
Internal immer-
sion heater Internal immersion overheat pro- tection triggered.
Class B
Usually caused by poor flow or air in the heating sys-
tem.
All other messag-
es Acknowledge the alarm as described below. If the alarm remains or reoccurs, contact a service technician.
In the case of an active alarm, information about the alarm is also available by pressing , close to the alarm.
Acknowledging alarms
Press to reset all alarms.
Contact the installer if alarms are persisting and/or recurring.
User Guide Atlas & Calibra
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