Thermia Mega User manual

User Guide
Mega
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 Värmepumpar

Table of Contents
1 Foreword ............................................... 4
2Safety precautions ......................................... 5
2.1 Symbols in documents .................................... 5
2.2 Important information .................................... 5
2.3 Installation and maintenance ................................ 6
2.4 System modifications .................................... 7
2.5 Safety valves ......................................... 7
3About your heat pump ....................................... 8
3.1 Product description ..................................... 8
3.2 Water heater ......................................... 8
4Control system ........................................... 9
4.1 Display description ...................................... 9
5Settings and adjustments ..................................... 11
5.1 Adjusting the indoor temperature ............................. 11
5.2 Adjusting the Heat Curve .................................. 12
5.3 Heating Settings ....................................... 13
5.4 Activate / deactivate functions ............................... 13
5.5 Selecting operating mode .................................. 13
5.6 Distribution circuits ..................................... 17
5.7 System information ..................................... 18
6 Default settings in the control unit ............................... 20
7 Regular checks ........................................... 21
7.1 Alarms ............................................. 21
7.2 Checking the brine circuit pressure ............................. 22
7.3 Check the water level in the heating circuit ........................ 23
7.4 Checking safety valves .................................... 23
7.5 In the event of leakage .................................... 24
7.6 Cleaning the filters for the heating and brine circuits .................. 24
8 Appendix ............................................... 26
8.1 Display symbol description ................................. 26
8.2 Calculating heat production ................................ 27
8.3 Heat curve ........................................... 27
8.4 Heating Settings ....................................... 31
8.5 Comfort settings ....................................... 32
9 Checklist ............................................... 33
10 Installation carried out by: .................................... 34
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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 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
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2 Safety precautions
2.1 Symbols in documents
The instructions contain different warning symbols, which, together with text, indicate to the user that there
are risks involved with actions to be taken.
The symbols are displayed to the left of the text and three different symbols are used to indicate the degree of
danger:
Danger Indicates an immediate danger that leads to
fatal or serious injury if necessary measures
are not taken.
Warning Risk of personal injury!
Indicates a possible danger that can lead to fa-
tal or serious injury if necessary measures are
not taken.
Caution Risk of installation damage.
Indicates a possible hazard that can lead to
item damage if necessary measures are not
taken.
A fourth symbol is used to give practical information or tips on how to perform a procedure.
N
Information regarding making the handling of
the installation easier or a possible operation-
al technical disadvantage.
2.2 Important information
Warning The front of the heat pump must only be
opened by qualified installers.
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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.
2.3 Installation and maintenance
Warning Only qualified installers may install, operate
and carry out maintenance and repair work on
the heat pump
Warning Only qualified electricians may modify the
electrical installation.
Warning Only qualified refrigeration technicians may
work on the refrigerant circuit
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2.4 System modifications
Only qualified installers may carry out 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.
2.5 Safety valves
Warning 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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3 About your heat pump
3.1 Product description
The Mega heat pump is a heating system for heating and, if an external water heater is installed (accessory), for
hot water production. It has a compressor which is customised for heat pumps.
The Mega heat pump is equipped with control equipment which is presented in a graphic display. The control
equipment 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 Mega heating unit consists of two basic components:
Heat pump unit
The heat pump consists of:
▪Scroll compressor
▪Stainless steel heat exchanger
▪Circulation pumps for collector system and heating system
Control equipment
The control equipment controls the incoming components of the heating appliance (compressor, circulation
pumps, auxiliary heating and exchange valve) and keeps track of when the pump should start and stop, as well
as whether it should produce heating for the building 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)
3.2 Water heater
The Mega heat pump can also produce hot water for an external water heater. The temperature of the water
supplied to the water heater is controlled by the start and stop temperature.
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4 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
4.1 Display description
Start screen
The screen which appears when the system is up and running.
Here you can also carry out comfort adjustment:
1. Drag clockwise or anticlockwise to raise or lower the offset.
Each point represents an increase/decrease of 1°C.
2. Alternatively, press or
Menu screen
This screen appears when you have pressed on the start screen.
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Drop down view
There is a quick link to system information. Press
11:20
at the top of any screen .
This screen appears where system information is presented.
Press
11:20
+2
5˚C
09/07/2015 13:15
at the bottom of the drop down view to hide the screen.
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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 installer/user are described below.
N
Never change control unit settings unless you
are aware of what effects the changes may
have.
Make a note of the default setting.
5.1 Adjusting the indoor temperature
The heat curve is a graph that compares the outdoor temperature with the supply temperature. The colder the
outdoor temperature is, the more heat is supplied to the heating system. The heat curve is adjusted during
installation. It must however be re-adjusted later to obtain a pleasant indoor temperature in all weather condi-
tions.
For an explanation of the factory pre-set heat curve, see Adjusting the Heat Curve.
At an outdoor temperature of 0°C the supply temperature should be 40°C. Note that this is only a benchmark.
There are radiator systems, floor heating systems and other types of heating system which require either lower
or higher temperatures.
At outdoor temperatures below 0°C, supply line water hotter than 40°C is supplied to the radiators. Supply line
water colder than 40°C is supplied if the outdoor temperature is above 0°C.
A correctly set heat curve reduces the need for maintenance, as well as making operation more energy-effi-
cient.
The indoor temperature is adjusted by changing the heat curve of the heat pump. This curve is the control
system's tool for calculating the correct supply temperature of water for the heating system.
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Comfort adjustment, to change temperature
Comfort adjustment means moving the whole curve upwards or downwards.
Drag clockwise or anticlockwise to raise or lower the offset. Each point
represents an increase/decrease of approximately 1°C on the supply
line temperature.
Alternatively, press or
NOTE: This option should be primarily used for temporary temperature adjustments. When permanently
changing the indoor temperature for a more precise indoor climate, change the heat curve settings.
5.2 Adjusting the Heat Curve
The Curve indicator has two modes that can be toggled by pressing the Curve indicator symbol.
40
When lit, the curve is adjusted as one unit.
40
When not lit, individual curve points can be moved separately.
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 and to the desired
temperature.
5. Confirm the new selection by pressing
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5.3 Heating Settings
In Heating settings, you can set seasonal stop and min/max supply line temperature.
Default value is 1x.
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
5.4 Activate / deactivate functions
N
Functions not activated/enabled from factory
must be enabled and activated in the control
system before they can be used.
Below is an example where the Distribution Circuit function is deactivated.
Other functions are activated in a similar way.
1. Press in the upper left corner of the Start screen.
2. Press .
3. Continue with to the menu page to activate/deactivate Distribution Circuit 1.
4. Press to activate Distribution Circuit 1 or press to deactivate Distribution Circuit 1.
5. Press to return to the Menu screen.
5.5 Selecting operating mode
N
The heat pump has a starting time of about 5 -
10 minutes.
The delay does not apply to the auxiliary oper-
ating mode.
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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.
Symbol Description
Operating mode Off. All functions off.
Components inside are still current carrying.
Operating mode Off. All functions off.
Auxiliary heater enabled but not activated.
Components inside are still current carrying.
Operating mode Service. All internal functions off.
Components inside are still current carrying.
External functions are on.
In this operating mode the heat pump is deactivated and will
not produce hot water or heating.
Operating mode Auxiliary heater + service.
External functions are on.
Auxiliary heater enabled but not activated.
In this mode the heat pump (compressor) is disabled, but the
unit can produce heating and hot water with the internal im-
mersion heater (and/or external auxiliary heater if activated).
This operating mode must be used if heating and/or hot water
is needed, but the compressor must be disabled e.g. when the
brine circuit is not available or installed.
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Symbol Description
Operating mode Auxiliary heater + service.
External functions are on.
Auxiliary heater enabled and activated.
In this mode the heat pump (compressor) is disabled, but the
unit can produce heating and hot water with the internal im-
mersion heater (and/or external auxiliary heater if activated).
This operating mode must be used if heating and/or hot water
is needed, but the compressor must be disabled e.g. when the
brine circuit is not available or installed.
Operating mode On. All activated functions are on.
In this operating mode, functions enabled in Settings can be
switched activated or deactivated.
Press to go to page 2 where functions can be activated/
deactivated.
See the example in the table below.
Operating mode On. All activated functions are on.
In this operating mode, functions enabled in Settings can be
switched activated or deactivated.
Auxiliary heater enabled but not activated.
Press to go to page 2 where functions can be activated/
deactivated.
See the example in the table below.
N
The list below shows examples of selected
functions on page 2 in Operating mode.
Functions not activated from factory must be
enabled in Settings before they can be activa-
ted and used.
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Symbol Description
Operating mode Heat production. Space heating is permitted.
Operating mode Hot tap water. Hot tap water production is permitted.
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5.6 Distribution circuits
Distribution circuit 1 is available from factory. Distribution circuits 2-5 require an expansion module, separately
sold as accessory.
Up to 5 distribution circuits can be active simultaneously.
Example of settings for distribution circuit 1:
1. Press in the upper left corner of the Start screen
2. Press
3. Press text for desired distribution circuit.
4. Page 1:
Settings for max/min supply temperature.
NOTE! The distribution circuit settings can not exceed the values set in the main heat curve.
Confirm the settings with
5. Page 2:
Settings for supply temperature at different outdoor temperatures.
NOTE! The distribution circuit settings can not exceed the values set in the main heat curve.
The temperature can be adjusted in two ways:
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▪If the Curve indicator
40
is lit, press or to adjust the entire curve.
▪Press and drag individual curve points:
▪If the Curve indicator
40
is not lit individual points can be moved separately by pressing
and to the desired temperature.
Confirm the settings with
The Curve indicator has two modes that can be toggled by pressing the Curve indicator symbol.
40
When lit, the curve is adjusted as one unit.
40
When not lit, individual curve points can be moved separately.
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 Shows the temperature on the system supply line.
Desired system supply line Shows the current system requirement value.
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.
Version information
In the menu Operating data, version information about the control system software is shown.
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This information is useful when contacting support.
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6 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
Operating mode Off
Min desired system
supply temp. 10°C
Max desired system
supply temp. 55°C
Seasonal stop 17°C
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