Thermia Thermia Legend User manual

User Guide
Thermia Legend
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 Common settings .......................................... 4
1.1 Quick guide .......................................... 4
2Foreword ............................................... 5
3Safety precautions ......................................... 6
3.1 Important information .................................... 6
3.2 Installation and maintenance ................................ 6
4About your heat pump ....................................... 8
4.1 Product description ..................................... 8
5Settings and adjustments ..................................... 10
5.1 Selecting operating mode .................................. 10
5.2 Heating settings ....................................... 11
5.3 Adjusting the indoor temperature - Heat settings .................... 13
5.4 Adjusting the Heat Curve .................................. 14
5.5 Hot water ........................................... 15
5.6 System information ..................................... 15
6 Accessories .............................................. 17
6.1 Accessories .......................................... 17
7 Alarms ................................................ 18
7.1 Alarms ............................................. 18
8 Regular checks ........................................... 20
8.1 Regular checks ........................................ 20
8.2 Check the water pressure in the heating circuit ...................... 20
8.3 Check level of brine ..................................... 20
8.4 Checking safety valves .................................... 21
8.5 In the event of leakage .................................... 21
8.6 Cleaning the filters for the heating and brine circuits .................. 21
9 Appendix ............................................... 23
9.1 Display symbol description ................................. 23
10 Checklist ............................................... 25
11 Installation carried out by: .................................... 26
User Guide Thermia Legend
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1 Common settings
1.1 Quick guide
Use the buttons to manoeuvre the menu.
HOT WATER
HEATING
AUX.HEATER
MANUEL TEST
INSTALLATION
SERVICE
Enter/set
Back/exit
Up/increase temperature (+)
Down/decrease temperature
(-)
Below is a summary of the most common settings you may need to make as owner of this heat pump.
▪Adjusting the indoor temperature is easy by adjusting the ROOM value:
▪Press or buttons once to open and change the ROOM value.
▪Adjust by pressing the or buttons, one step will alter the indoor temperature approxi-
mately 1°
▪Wait 10 seconds or press the left button to exit the menu
Note! If it is to warm (or cold) in the house, it is important to regulate the indoor temperature by adjusting the
settings in the heat pump display. Avoid turning down radiator thermostats or floor heating thermostats to
reduce room temperature. With open thermostats you will extend the lifespan of the heat pump and you often
also save more money as the heat pump will run more efficient.
Observe that the effect of the adjustment takes up to approximately 24 hours to be noticeable, depending on
the heating system and insulation of the building etc.
▪Display notifications (Alarms) or no hot water
If an event occurs that triggers the alarm, this is indicated in the display with the text "ALARM" and relevant
alarm message. Make a note of the alarm message, the alarm can often be reset once by setting the heat pump
to operating mode OFF and then back to desired operating mode. For more information about alarms go
to the Alarm chapter.
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2 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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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. 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.
The appliance 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 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.
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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!
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. (Accessory Online)
Heating is collected from a ground collector and is provided to the building via a water-borne heating system.
The heat pump (compressor) supplies as much of the heat demand as possible before auxiliary heating is en-
gaged to assist. If cooling is installed, the heat pump can also provide cooling.
The heating unit consists of some different components:
Heat pump unit
The heat pump consists of e.g.:
▪Scroll compressor
▪Stainless steel heat exchanger´s
▪Speed controlled, low energy circulation pumps for collector system and heating system
▪Inbuilt stainless water heater
▪Internal electrical immersion heater
▪The Duo heat pump has a separate water heater. The temperature in the water heater is controlled by
temperature sensors.
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:
▪Control display.
▪Temperature sensors e.g. (outdoor, supply line, return line, brine and hot water).
▪Pressure switches.
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. If
you have cooling installed, the cooling is supplied in a similar way, often to fan coils or under floor systems
prepared for cooling.
Heat settings & supply line temperature
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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.
Note! It is important to regulate the indoor temperature by adjusting the temperature in the heat pump dis-
play instead of turning of the radiators by using e.g. thermostats. This way you extend the lifespan of the heat
pump and you save more money as the heat pump will run more efficient.
General guidance:
In order to increase the indoor temperature with 1 degree, the supply line temperature should often be in-
creased by 2-3°C.
(To decrease indoor temperatures, lower the temperature settings correspondingly.)
When the heat curve is set properly, the ROOM value adjustment will work as a easy adjustment to increase/
decrease the indoor temperature, affecting the indoor temperature with approx 1°C / step by changing the
supply line temperature with 3° (regardless of outdoor temperature).
For further information. See heat settings.
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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 be aware that some changes may take some time to take effect due to the nature of a
heating system.
5.1 Selecting operating mode
Set the heat pump to the desired operating mode in the menu: OPERAT. > (*shows current mode) Select
mode by using or buttons. Press right button to confirm choice. Press right button twice
to exit the menu.
OPERAT.
AUTO
OFF
AUX. HEATER
COMPRESSOR
HOT WATER
Operating modes, symbols and descriptions:
▪OFF: The installation is fully switched off (risk of freezing). This mode is also used to acknowledge and
reset alarms.
▪AUTO : The heat pump automatically controls the heat pump and auxiliary heater. (Normally recommen-
ded mode.)
▪COMPRESSOR: In this mode the aux heater is blocked and will never assist. (=e.g. no backup heating in
case of alarms and no anti legionella top up heating of hot water). Therefore this setting is not recom-
mended for use as a permanent operating mode, or when the property is unattended. (Risk of freezing.)
▪AUX. HEATER: The control system only permits the auxiliary heater to be in operation, can be used in the
event of certain alarms or to provide heating or hot water before the brine circuit is installed.
▪HOT WATER: In this mode the heat pump only produce hot water. No heat is directed to the heating
system. (Risk of freezing.)
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5.2 Heating settings
5.2.1 Heating settings, general
The indoor temperature is adjusted by changing the heat pump’s heat curve and room settings. The heat curve
is used for the controller to calculate and make sure that the heat pump supply heating, based on the outdoor
temperature. A colder outdoor temperature results in more heat being supplied to the heating system to ob-
tain a pleasant indoor temperature in any weather condition. A correctly set heat curve reduces maintenance
and saves energy.
To insure a long lifetime and avoid operational disturbances, avoid regulating heating with thermostats and
adjust the temperature on the heat pump instead. (Applies especially for system without volume or buffer
tank. )
A typical heat curve "40" is shown below, as an example. At an outdoor temperature of 0°C the target average
supply temperature will be 40 degrees with heat curve 40 (at room setting 20).
Curve adjustment curve 40 example (at room setting 20)
2 0 ° 0 ° - 1 0 °1 0 ° - 2 0 °
20°
30°
40°
50°
55°
60°
4 0
max 55
min 20
The illustration for heat curve 40 (red line) shows that at outdoor temperatures colder than 0°C, supply water
hotter than 40°C is sent out to the radiators. At outdoor temperatures greater than 0°C, supply water cooler
than 40°C is sent out. When the CURVE value is increased, the heat curve will become steeper and when the
value is reduced, it will become flatter. If the heat curve is set correct (normally to provide 20 degrees indoor
temperature), the room setting (at the start screen) can be used to easily adjust indoor temperature up or
down approx 1 degree / step. (For floor heating systems, heat curve 30 (black line in picture above) is shown as
example.)
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Room adjustment example at room 20 (with heat curve 40)
The ROOM value (marked as (20) below ) is used to lift or lower the heat curve (keeping the same inclination)
with 3 degrees / step. This means that the indoor temperature will change approx 1 degree per step up or
down on room value change. The Room value should be considered as a reference to make the basic heating
adjustment more intuitive, and may not always reflect actual indoor temperature.
”21””22” ”19”
2 0 ° 0 ° - 1 0 °1 0 ° - 2 0 °
20°
30°
40°
50°
55°
60°
+3°
-3°
General guideline for adjustment:
Provided that the heat curve is initially adjusted for the heating system, the following general & simplified rec-
ommendations can be used as guideline:
If the outdoor temperature is warmer than -5°C and the indoor temperature is not as desired, change the
ROOM setting one step up or down to change the indoor temperature ~1 degree up or down.
If the outdoor temperature is lower than -5 degrees and the indoor temperature is not as desired (but it was OK
at warmer out door temperatures), change the HEAT CURVE setting 1-2 degrees up or down to change the in-
door temperature approximately 1 degrees up or down.
If the temperature is as desired in general, but not around +5/0/-5 degrees out door temperatures, the heat
curve can also be fine-tuned just around these temperatures. In many cases an increase of 1-2 degrees may be
suitable at these out door temperatures to compensate for effects by wind and unstable weather conditions.
By adjusting the heat curve & room setting correctly (as low as possible provided that the desired indoor tem-
perature still can be kept), the savings efficiency and life time of the heat pump is maximised.
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5.3 Adjusting the indoor temperature - Heat settings
Adjustment, to change the indoor temperature, quick settings if the heat curve is correctly set.
To increase or decrease of the indoor temperature, adjust the ROOM value.
Change the ROOM value as follows:
TEMPERATURE
ROOM 20C
1. Press either the or button once to open and change the ROOM value.
2. Increase or decrease the ROOM value using the or buttons to change the indoor tem-
perature.
3. Wait 10 seconds or press the left button once to exit the menu.
One step up or down compares to approximately 1°C indoor temperature. If the temperature in the house is to
high: Lower the ROOM value or HEAT CURVE. (Avoid closing the thermostats to lower room temperature.)
The "room" temperature setting may not reflect to the actual room temperature, but is intended as a reference
intuitive adjustments. Do not change room temperature more than +/-3°.
Observe that the effect of the adjustment may take up to approximately 24 hours to be noticeable, depending
on the heating system and insulation of the building etc.
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5.4 Adjusting the Heat Curve
CURVE
MIN
MAX
CURVE +5
CURVE -5
CURVE 0
HEAT STOP
40 C
20 C
55 C
0 C
0 C
0 C
17 C
HEAT CURVE
1. Open the HEAT CURVE menu in the INFORMATION menu.
2. Select the parameter required using the or
button.
3. Open the parameter by pressing the right button once
.
4. Increase or reduce the value with the or but-
ton.
5. Press the left button three times to exit.
Note! If your house has under floor heating and heat sensitive floors, the supply line temperature must not
exceed certain temperatures. Otherwise the floor might get damaged.
Parameter Description
CURVE If the CURVE value is increased, the heat curve will become steeper; if the value is reduced, it
will become flatter and less heat will be supplied when it gets colder. Raise to increase indoor
temperatures, reduce to lower indoor temperatures. (The factory setting is 40 for radiator sys-
tems and 30 for floor heating.)
MIN Lowest setpoint for supply temperature. (Normally 20°C.)
MAX Highest setpoint for supply temperature. (Caution - high supply line temperature may cause
damage to e.g. floors with floor heating.)
CURVE 5 Used to fine tune the heat curve at an outdoor temperature of +5°C.
CURVE 0 Used to fine tune the heat curve at an outdoor temperature of 0°C.
CURVE -5 Used to fine tune the heat curve at an outdoor temperature of -5°C.
HEAT STOP This function stops all production of heat when the outdoor temperature is equal to, or higher
than, the heat stop value currently set.
REDUCTION This function is not used in standard applications, but when used, this setting is used to set
desired reduction of ROOM value when the external control is active. (Also hot water produc-
tion may be affected when the external signal is active.)
40 C
- C
1
2
3
5
4
1 Supply temperature (°C)
2 Maximum setpoint value
3 Outdoor temperature (°C)
4 0°C
5 Set value (standard 40°C)
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ROOM
FACTOR
Used to adjust the influence of the ROOM value. Default 3. (2 can be used for e.g. floor
heating). Also used for room sensor influence (if installed).

5.5 Hot water
The hot water settings are set from factory (or by installer for any installation specific requirements) for high
hot water comfort & availability with high savings efficiency. Therefore no adjustments are required. Automatic
top up (anti-legionella) is with factory setting performed in a one week interval in operating mode Auto.
For special occasions, when maximum availability of hot water is desired, a one-time top up heating "EXTRA
HOT WATER" may be initiated.
To activate, press >select "HOT WATER" and then "EXTRA HOT WATER".
If the operation mode "COMPRESSOR" is set when the function is activated, the top up will be done only on
compressor.
If operation mode Auto is set when the function is activated, both compressor & auxiliary heater will be used to
provide maximum amount of hot water.
Note! The function is only possible to activate when the hot water tank is not already considered as fully charg-
ed by the controller.
5.6 System information
Check applicable operating data described in the tables below. The information can be found in the sub-menu
INFORMATION > TEMPERATURE >
Operating data, temperature
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
The information can be found in the sub-menu INFORMATION > OPERAT.TIME >
Explanation
COMPRESSOR Shows the number of hours that the heat pump has been in operation.
AUX. HEAT 1 Shows the number of hours that the immersion heater step 1 has been in
operation.
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Explanation
AUX. HEAT 2 Shows the number of hours that the immersion heater step 2 has been in
operation. (Step 3= Step 1 + step2)
HOT WATER Shows the number of hours that hot water has been produced.
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 40/30°C
Min desired system
supply temp. 20°C
Max desired system
supply temp. 60/45°C
Heating - Seasonal
stop 17°C
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6 Accessories
6.1 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. Not all options or combinations may be available for your heat pump. Contact your
installer if you have any specific requests.
Installed accessories will make settings available in the display. Example of available accessories include:
▪Pool heating
▪Online supervision
▪Extra shunt group
▪External auxiliary heater
▪Passive cooling
▪Active cooling
▪Power limiter
▪Flow guard
▪Buffer tank control
▪Room sensor
▪Etc.
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7 Alarms
7.1 Alarms
If an event occurs that triggers an alarm this is indicated in the display with the text ALARM and an alarm mes-
sage. Below is a list of the most common alarms and what you can do.
When alarms are active, the heat pump will in most cases stop producing hot water. This is made to draw atten-
tion to the alarm. Hot water production will start again when the problem is solved (and alarm is reset by set-
ting operating mode off, confirm and then back to desired operating mode).
If the problem can not be solved, hot water and heating can in most cases be produced in operating mode
Auxiliary heater. (note that operating mode aux heater will increase the energy consumption.)
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1
2
Motor protection alarm: This is often caused by a broken (main) fuse in the property.
1. Check fuses, replace if necessary.
2. Set the heat pump to operating mode OFF and confirm, to reset alarm.
3. Set the heat pump to operating mode AUTO.
If the problem persists, contact your installer as the motor protection may need a manual reset.
Overheat protection alarm: May be caused by air/low pressure in the heating circuit or no
flow.
1. Check pressure in heating circuit and bleed air from the heating system if required. (See
description in regular checks chapter.) If required, fill up to recommended pressure.
2. Set the heat pump to operating mode OFF and confirm.
3. Turn off the electric main supply to the heat pump and then carefully remove the front of
the heat pump using a flat screw driver on the top locking mechanism. Fold the front
carefully forward and lift it off (be careful with the display cable).
4. Reset the overheating protection by pressing the button (quite hard) in the left corner.
See picture, T1 is overheat protection.
5. Re-fit the heat pump front and then turn on the electrical supply again. Turn on electric
main supply.
6. Set the heat pump to operating mode AUTO
bar
1.0 1.5
0.5 2.0
02.5
High pressure alarm: Check system pressure (see description in regular checks). Also check
that any thermostats on radiators & floor heating are open, and vent heating system for air.
1. Set the heat pump to operating mode OFF and confirm to reset alarm.
2. Check system pressure (see description in regular checks). Also check that any thermo-
stats on radiators and floor heating are open, and vent heating system for air.
3. Set the heat pump to operating mode AUTO.
4. If the alarm goes off again, set the heat pump to operating mode auxiliary heater (to get
hot water) and contact your installer.
Low pressure alarm: Usually caused by air or no flow in the brine circuit.
1. Check the brine level in the vessel (must not be empty, should normally be ~2/3 full). If
the fluid level is too high or low, contact your installer if you are uncertain how and with
what to fill.
2. If the brine level is ok, reset the alarm ONCE. If the alarm goes off again, set the heat
pump to operating mode auxiliary heater and contact your installer.
For any alarms re-occurring, please contact your installer for advice.
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8 Regular checks
8.1 Regular checks
Even if the heat pump requires very little maintenance, some regular system checks are recommenced. In gen-
eral for most heating systems, it is recommended to adjust the heating on the heat pump controller and avoid
closing thermostats in the heating system, as far as possible and suitable. In many cases adjusting the heat in
the heat pump controller instead of closing thermostats will reduce the need of maintenance and extend the
lifespan of the heat pump. As a correctly adjusted heat pump will run more efficient, it will often also consume
less energy.
8.2 Check the water pressure in the heating circuit
The system pressure of the installation should at regular basis be checked. Ensure that the heating system has
the necessary pressure, according to the installers advice (often approximately 1 bar), but never more than 3
bar.
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 how to fill, 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!
8.3 Check level of brine
If the level of brine is lower than 1/3 filling is recommended. Contact your installer if you are in doubt how till
fill.
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