Thermia Athena User manual

User Guide
Athena
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
2Safety precautions ......................................... 5
2.1 Important information .................................... 5
2.2 Installation and maintenance ................................ 5
3Common settings .......................................... 7
3.1 Common settings ...................................... 7
4About your heat pump ....................................... 8
4.1 Product description ..................................... 8
5Settings and adjustments ..................................... 11
5.1 Selecting operating mode .................................. 11
5.2 Adjusting the indoor temperature - Heat settings .................... 13
5.3 Adjusting the Heat Curve .................................. 13
5.4 Heating Settings ....................................... 14
5.5 Hot water settings ...................................... 14
5.6 Cooling settings, Athena HC* ................................ 15
5.7 System information ..................................... 16
6 Online ................................................. 18
6.1 Online ............................................. 18
7 Accessories .............................................. 19
7.1 Accessories .......................................... 19
8 Alarms ................................................ 20
8.1 Alarms ............................................. 20
9 Regular checks ........................................... 22
9.1 Refrigerant leak inspections, Athena HC* ......................... 22
9.2 Check the water pressure in the heating circuit ...................... 22
9.3 Checking safety valves .................................... 22
9.4 In the event of leakage .................................... 22
9.5 Cleaning the filters for the heating and water circuits .................. 23
10 Appendix ............................................... 25
10.1 Display symbol description ................................. 25
10.2 Calculating heat production ................................ 27
10.3 Comfort settings ....................................... 28
10.4 Heat curve ........................................... 29
11 Checklist ............................................... 32
12 Installation carried out by: .................................... 33
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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 sustainable heating, hot water and, in certain cases,
cooling for your home at a low energy consumption.
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
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2 Safety precautions
2.1 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 units must only be opened by qualified installers.
2.2 Installation and maintenance
Only qualified installers may install, operate and carry out maintenance and repair work on the units.
The appliances shall be stored and installed so as to prevent mechanical damage from occurring.
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 indoor unit
▪The outdoor unit
▪The pipes for the refrigerant 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.
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Make sure to never block the connection to the safety valves' overflow pipes.
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!
Therefor, allow it to flow to a floor drain to prevent any risk of burning yourself.
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3 Common settings
3.1 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.
Without room sensor
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 Heating settings 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.
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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, and cooling*. It has a compres-
sor which is customised for heat pumps.
The indoor unit is equipped with control equipment which is presented in a graphic display. The system is also
prepared for monitoring via the internet.
Heating and cooling* 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.
* Cooling function is for Athena HC only. Athena HC is only available in certain markets.
The heat pump consists of two basic components:
Outdoor unit
The outdoor unit consists of:
▪Relay circuit boards (IWS, GW, converter)
▪Variable speed EVI scroll compressor controlled by frequency converter
▪Compressor oil heater
▪Fan
▪4-way valve
▪Stainless steel heat exchangers (water refrigerant)
▪Copper-Aluminum heat exchanger (air refrigerant)
▪Electronic expansion valves and pressure transmitters for surveillance of the refrigerant
▪Electric immersion heater for space heating and tap water heating
▪Electronic flow meter
▪Inbuilt drip tray
Indoor unit (control unit)
The indoor unit (CM) controls the components of the heating appliance and keeps track of when the outdoor
unit or indoor unit should start and stop, as well as whether it should produce heating or hot water, or cooling
if applicable.
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The indoor unit consists of:
▪Colour touch screen (CM)
▪Relay circuit board (BM)
▪Insulated stainless water heater
▪Temperature sensors
▪1x pwm controlled circulation pump (Athena Compact & Athena Total 300L)
▪2x pwm controlled circulation pumps (Athena Total EQ)
▪Extra volume tank 60L for space heating system (Athena Total EQ)
▪Electric immersion heater for space heating and tap water heating
▪Reversing valve between heating and tap water
Heating system
In your heating system, water is circulating from the heat pump through radiators or floor heating and back
again to provide heating to the building, and to prevent freezing, except during summer when there is no need
for heating . If you have cooling installed, the cooling is supplied in a similar way, often to fan coils or under
floor systems prepared for cooling*.
* Cooling function is for Athena HC only. Athena HC is only available in certain markets.
Note: During the outdoor unit's defrost cycle, it is common that quite a lot of steam comes from the unit. This is
a natural process to keep the outdoor unit from building up ice, from water condensation.
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 control.
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 to 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.
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(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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5 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 adjustments 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.
5.1 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.
4. Normal mode is Auto (On).
If the compressor has been in operation a so-called restriction time may occur temporarily preventing the
heat pump from starting.
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Symbol Description
Operating mode On/Auto
(This is normal mode).
All activated functions are on. By factory default, heating and
hot water is produced. Compressor and internal immersion
heater are controlled automatically.
Operating mode Auxiliary heater only.
This setting can be often be used as "emergency mode" for
heating and hot water if the compressor is blocked for opera-
tion.
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 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!
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5.2 Adjusting the indoor temperature - Heat settings
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.
5.3 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
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5.4 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: Enable heat is by default ON and should normally never be deactivated, as this could cause freezing and
property damage.
5.5 Hot water settings
In hot water settings you may choose from 4 different hot water modes depending on your preferences:
Low: A setting to use typically during time away from home. The hot water function can never be turned off
completely, to ensure a working defrost cycle.
Economy: Can be used as default mode to get the most energy efficient hot water production when the de-
mands 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.
Normal: Often a good setting for normal families and is optimized to give a very good compromise between
comfort and economy giving a high amount of available hot water, but also a low energy consumption.
Comfort: Will give shortest recharge times and highest hot water capacity, but with a somewhat lower efficien-
cy 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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5.6 Cooling settings, Athena HC*
* The following chapters on cooling functionality is for Athena HC only. Athena HC is only available in certain
markets.
Your heat pump can produce cooling during summer time to give you an extra pleasant indoor climate. The
cooling menu icon is visible in the heat pump display.
To view and change actual cooling settings:
1. Press on the Start screen to open the Menu screen.
2. Press
3. Make the desired changes.
4. Confirm settings by pressing .
Enable cooling
If cooling is activated, the heat pump will stop heating and will start and stop cooling automatically (If the cool-
ing is deactivated, cooling will never start).
General information
Important! A desired cooling temperature set too low can give condense problems in certain systems, espe-
cially at high air humidity. Contact your installer for advice if you are uncertain and/or would like to lower the
desired cooling supply (min) temperature.
5.6.1 Cooling without indoor room sensor (standard)
The cooling function will be activated automatically when the outdoor temperature over time has exceeded
the set value for cooling seasonal start. This is how the heat pump detects and sets the heat pump to “cooling
season” mode. If the outdoor temperature drops, cooling will (with some delay) stop. The cooling seasonal
start shall therefor be set to the outdoor temperature from where cooling is normally required.
Desired cooling supply is the target temperature that the heat pump will strive to supply and circulate to the
cooling system when supplying cooling.
5.6.2 Cooling with indoor room sensor (accessory)
If an indoor room sensor is installed and activated for cooling, this will also affect the cooling function. With
indoor sensor activated for cooling, the heat pump will start cooling when both of the following criteria are
fulfilled:
▪Cooling season mode active &
▪Indoor temperature exceeds the desired indoor temperature for heating + the desired offset room tem-
perature for cooling (default 2 degrees).
The desired temperature can be adjusted in the cooling menu. It is also possible to set if the indoor room sen-
sor should be allowed to control cooling.
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With an installed room sensor, the controller will automatically regulate the cooling supply temperature, but
not below Desired cooling supply (min).
5.7 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.
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.
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.
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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 40/30°C
Min desired system
supply temp. 20°C
Max desired system
supply temp. 60/45°C
Heating - Seasonal
stop 17°C (outdoor temperature)
Cooling - Seasonal
start 25°C (outdoor temperature)
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6 Online
6.1 Online
The heat pump is factory prepared for monitoring remotely via internet. (Thermia Online)
In order to use the Thermia Online service:
▪Make sure that there is an available internet connection (router or equivalent) in the building
▪Connect the commissioned heat pump to an existing internet connection (router or equivalent). Use the
RJ45 connection placed below the display (CM module) behind the front panel. Use a patch cable (not
cross over cable).
▪1. Press the Menu icon to open the Menu screen.
2. Press the Settings icon .
3. Press the text System settings.
4. Press the text Online.
5. Press to activate.
▪Make a note of the heat pump MAC-address. The MAC-address is also available in the Network menu in
the display
▪An account and registration is required to use the Thermia Online service.
For more information, see:
www.thermia.com/online
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7 Accessories
7.1 Accessories
There are a number of accessories available to be installed with this heat pump. Below is a list of the most com-
monly used accessories. Contact your installer if you have any specific requests.
Installed accessories will make settings available in the display. Different accessories have different ways of
controlling its functionality, depending on sensors, extra equipment added to the system (bought and deliv-
ered separately with each accessory), etc.
Information about these individual settings can be found by pressing the Information icon on the respec-
tive accessory page in the display, when applicable.
▪Distribution circuit 1
▪External auxiliary heater
▪Smart grid/EVU
▪Dewpoint sensor
▪Room sensor
▪Pool (requires EM3:0)
▪Current limiter (requires EM3:0)
▪Etc.
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8 Alarms
8.1 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 an "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 alarm icon on the start page.
▪Class B: Does not stop the heat pump. The alarm must be acknowledged.
The display shows a yellow alarm icon on the start page.
▪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".
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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