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Thermia iTec Commissioning

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Ana Peinado
May 25, 2025

Good morning. My outdoor unit has the 320 error two weeks ago and I would like to know what I can fix It. My current solution is tis switch off and on the iTech.

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Summary of Contents for Thermia iTec

  • Page 1 Commissioning iTec www.thermia.com...
  • Page 2 Thermia Värmepumpar is not liable or bound by warranty if these instructions are not adhered to during installation or service. The English language is used for the original instructions. Other languages are a translation of the original instructions. (Directive 2006/42/EC)

  • Page 3: Table Of Contents

    Activate electrical auxiliary heater in iTec Standard ........

  • Page 4: About Documents And Decals

    Commissioning iTec About documents and decals Introduction The following documents are available for this product: ▪ The Installation Quick Guide is an illustrated step-by-step guide on how to install the heat pump. Supplied with the heat pump on delivery. ▪ Installation Guide. Complements the Installation Quick Guide and gives thorough information on how to install the heat pump.

  • Page 5: Symbols On Decals

    Commissioning iTec Symbols on decals The following symbols can occur on decals on the different parts of the heat pump. Which symbols are used depends on the heat pump model. 1.3.1 General Warning, danger! Warning, hot surfaces! Warning, moving parts! Read the documentation provided.

  • Page 6: Important Information/Safety Regulation

    General safety precautions Carefully follow the precautions listed as below because they are essential to guarantee the safety of Thermia product. Store the manual in a safe place in order to be able to use it as reference after installation. Remember to hand it over to the new owner if the heat pump unit is sold or transferred.
  • Page 7 Caution ter turning off the power, because the unit contains capacitors which may be charged. Do not start the unit ( iTec Total) if there is a possibility of frozen water Caution in the immersion heater. When cooling, it is important to limit the lowest flow line temperature Caution to prevent condensation.

  • Page 8: Refrigerant

    Commissioning iTec Refrigerant 2.2.1 Refrigerant Work on the refrigerant circuit must only be carried out by a certified Caution engineer! Although the heat pump cooling system (refrigerant circuit) is filled with a chlorine-free and environmentally-approved refrigerant that will not affect the ozone layer, work on this system may only be carried out by authorized persons.

  • Page 9: Commissioning

    Commissioning iTec All warranties from Thermia are void if, when filling with refrigerant Caution other than not valid specified refrigerant, if there has not been written notification that the new refrigerant is an approved replacement re- frigerant together with other remedies.

  • Page 10: Configuration Of Control System

    Commissioning iTec Configuration of control system Setting heat pump size The installation may only be commissioned if the heating system and Caution water heater have been filled and bled. Otherwise the circulation pump can be damaged. To be able to commission the installation, make sure the outdoor and indoor units are powered on.

  • Page 11: Select Display Language

    Commissioning iTec To avoid alarms during start-up, the outdoor unit must be powered Make the settings in the order they appear in the text that follows. Further information about parameters on the indoor unit are found in the Information Menu and Service Menu chapters.

  • Page 12: Set Hot Water Start Temperature And Activate Hot Water

    If the heat demand is greater than the heat pump’s compressor capacity, the immersion heater engages automatically in operating mode AUTO. iTec Total has three outputs, IMM. HEAT 1, IMM. HEAT 2 (factory default) and IMM. HEAT 3 and output can be controlled in five steps.

  • Page 13: Activate Electrical Auxiliary Heater In Itec Standard

    In iTec Total a multi power stage heater (IMM. HEATER) is factory installed. The indoor unit control system engages the appropriate amount of heating power to ensure the desired heating system temperature. Below is a table describing the different power steps.

  • Page 14: Activate Cooling

    Commissioning iTec The following settings are made in the Service Menu. If not already in the Service Menu, enter the Service Menu by pressing and holding left (<) arrow for at least 5 seconds. Use + or – to move up and down in the menu.

  • Page 15: Distribution Circuits

    There are three available mixing valve options: ▪ Mixing valve (Activation, see chapter "Activate the external auxiliary heater in iTec Standard") ▪ Distribution circuit (DISTR. CIRCUIT) 1 ▪ Distribution circuit (DISTR. CIRCUIT) 2 (Requires expansion card) The mixing valve is used between the heat pump, an external auxiliary heater (may be an oil burner or equivalent) and the heating system.

  • Page 16: Activation Of Optimum Circulation (Variable Speed) Pump

    The Optimum circulation pump is factory installed in iTec Total. The OPTIMUM option is however not activated from factory. If fixed speed circulation pump is used, which may be the case for iTec Standard, then skip this setting. The following settings are made in the Service Menu. If not already in the Service Menu, enter the Service Menu by pressing and holding left (<) arrow for at least 5 seconds.

  • Page 17: Find Min. Flow

    If any functions are activated after the FIND MIN.FLOW sequence is done, they will have their respective default setting. For iTec Standard, with fixed speed circulation pump, the flow has to be set from MANUAL TEST. Make sure the "F" symbol is present in the display after finishing the test.
  • Page 18 Commissioning iTec Find the min. flow in the menu: ▪ SERVICE ▪ OPTIMUM ▪ FIND MIN. FLOW ▪ Press right arrow (>) to enter the FIND MIN. FLOW menu. The off symbol ( ) is shown. ▪ Press right arrow (>) to activate the FIND MIN. FLOW menu.
  • Page 19 Commissioning iTec The min. flow found in this procedure is the actual flow that exists in the current configuration of the system. Seasonal variations with dif- ferent temperatures may alter the behavior of the system and this may affect the flow as well. For example, automatic radiator valves may open or close depending on the temperature.

  • Page 20: Manual Test

    Commissioning iTec Manual test The installation may only be commissioned if the heating system and Caution water heater have been filled and bled. Otherwise the circulation pump can be damaged. Any alarms that may occur in connection with the installation must be Caution fault-traced.
  • Page 21 In the event of pumps with fixed speed, the selection 0 = stop and 1 = start are available For iTec Standard, with fixed speed circulation pump, the flow has to be set from MANUAL TEST. Make sure the "F" symbol is present in the display after finishing the test. If not, check the system for air, and that the flow switch is correctly installed.
  • Page 22 Commissioning iTec If the flow in the circulation pumps need to be adjusted, see chapter Adaptation of the heating system. The following settings are made in the MANUAL TEST menu. To activate MANUAL TEST, see description above. Use + or – to move up and down in the menu.
  • Page 23 Commissioning iTec Test reversing valve (if installed) for hot water 1. Activate the reversing valve by setting the value REV.V. HOT WATER to 1. 2. Check that the indicator on the reversing valve's upper side changes position. Test the auxiliary heater 1.
  • Page 24 Commissioning iTec Exit test operation Set the value for MANUAL TEST to 0. Insulate the piping When the manual testing is finished, do a final check for leaks and insulate the piping. Make sure that pipes transporting cold water are insulated to prevent Caution condensation damage.

  • Page 25: Menu Information

    Commissioning iTec Menu information The heat pump has an integrated control system which automatically calculates the heat demand in the house to ensure that the cor- rect amount of heat is produced and emitted when necessary. The control system is operated using a keypad and information is shown in a display and by an indicator.

  • Page 26: Information Menu

    Commissioning iTec INFORMATION menu Menu overview ▪ OPERAT. ▪ HEATING ▪ DISTR. CIRCUIT1 ▪ DISTR. CIRCUIT2 ▪ HOT WATER ▪ COOLING ▪ POOL ▪ BUFFER TANK ▪ OP. DATA ▪ OPERAT. TIME ▪ DEFROST ▪ CALENDAR ▪ CLOCK ▪ HOT WATER BLOCK ▪...

  • Page 27: Heating

    Commissioning iTec Menu selection Meaning Factory setting Operation with heat pump for hot water production and auxiliary heater during peak HOT WATER heating charging (anti-legionella function). When the operation is set to HOT WA- TER, the circulation pump is not run- ning.

  • Page 28: Distribution Circuit 1 - 2

    Commissioning iTec Parameter Meaning The temperature that will apply at temperature setback. Temperature setback is activated via the calendar func- SETBACK TEMP tion. When the function is activated ROOM is the temperature that is set here. Factory setting: 18°C, range: 10°C – 30°C ROOM FACTOR Only displayed if an accessory Room temperature sensor is installed.

  • Page 29: Hot Water

    Commissioning iTec HOT WATER Parameter Meaning HOT WATER Allows hot water production. Factory setting: , range: – ON ECO-MODE With ECO-MODE switched on, the heat pump will produce hot water in the most economic way possible. If you should want a prioritization on the amount of hot water and a faster hot water production you should switch off eco-mode.

  • Page 30: Op. Data

    Commissioning iTec Parameter Meaning Activate high temperature mode when the external auxiliary heater is selected. TANK TOP UP The external auxiliary heater will heat the tank to the highest permitted tank temperature. Factory setting: , range: – ON The function permits a reduction of the temperature in the tank when the temperature reduction is set to active RED.

  • Page 31: Defrost

    Commissioning iTec Parameter Meaning Operating time for IMMERSION HEATER 2. IMM. HEAT 2 Operating time for IMMERSION HEATER 3. IMM. HEAT 3 Operating time for external auxiliary heater. EXT.AUX.HEAT 7.11 DEFROST Parameter Meaning Total number of defrosts carried out. DEFROSTS BETW.

  • Page 32: Language

    Commissioning iTec 7.14 LANGUAGE Menu selection SVENSKA ENGLISH DEUTSCH NEDERLANDS FRANÇAIS ESPAÑOL ITALIANO NORSK DANSK SUOMI EESTI POLSKI ČEŠTINA SLOVENSKI SLOVENSKÝ HRVATSKI SRPSKI LIETUVOS ÍSLENSKA TÜRKÇE MAGYAR ROMÂNĂ PORTUGUÊS български русский VIJSR102 Thermia Värmepumpar...

  • Page 33: Service Menu

    Commissioning iTec SERVICE menu Menu overview To be able to chose a specific function, the sensor for that function must be connected. ▪ HOT WATER ▪ HEATING ▪ COOLING ▪ AUX. HEATER ▪ MANUAL TEST ▪ INSTALLATION ▪ SYSTEM ▪ HEAT SOURCE/AIR/DIRECT EVAP./NO SIZE ▪...

  • Page 34: Heating

    Commissioning iTec Parameter Meaning Time in hours that the legionella demand is to be fulfilled for peak heating charging to be considered com- TOPH. TIME plete. Factory setting: , range: , 1H – 10H Stop temperature for peak heat charging. Operating mode that permits auxiliary heater must be selected.

  • Page 35: Aux. Heater

    Commissioning iTec Parameter Meaning Activation of room sensor function for influencing cooling production. ROOM SENSOR Factory setting: , range: – ON Compressor is stopped if the temperature from the room sensors falls below the desired temperature minus COOL.HYST.RS LO COOL.HYST.RS LO.
  • Page 36 In the event of pumps with fixed speed, the selection 0 = stop and 1 = start are available For iTec Standard, with fixed speed circulation pump, the flow has to be set from MANUAL TEST. Make sure the "F" symbol is present in the display after finishing the test. If not, check the system for air, and that the flow switch is correctly installed.

  • Page 37: Installation

    Commissioning iTec INSTALLATION Parameter Submenu Meaning SYSTEM HEAT SOURCE Selecting heat pump type for configuration of control. Outdoor air with direct evaporation and four-way valve. Activates the pool function. POOL Factory setting: , range: – ON Activates the distribution circuit function and indicates if the circuit is to be controlled DISTRIBUTION CIR- by the heat curve or by a constant temperature.

  • Page 38: Defrost

    Commissioning iTec Parameter Submenu Meaning Indicates the version number of the software in the control. VERSION DISPLAY COMM.KIT MAIN MICOM INV. MICOM EEPROM Time interval between collection points of temperature history in minutes. LOG TIME The history graphs always show the 60 last collection points, which means that the graphs can display history from 1 hour up to 60 hours ago.

  • Page 39: Buffer Tank

    Commissioning iTec Parameter Meaning Lowest desired supply temperature during water heating. MIN H.W CHARGE Factory setting: 45°C, range: 30°C – 65°C This function is only valid for heat pumps with the Optimum function. FIND MIN FLOWS The parameter is only active if the operation mode is set to .

  • Page 40: Outd. Unit Info

    Commissioning iTec Parameter Meaning Indicates if the distribution circuit must be controlled by a heat curve or by a constant temperature. DISTRIBUTION Factory setting: CIRCUIT 1 - 2 HEAT CURVE, range: HEAT CURVE – CONSTANT TEMP - OPEN CIRCUIT. At the selection OPEN CIRCUIT, the shunt outputs are not ac- tive, but the temperature for the distribution circuit is displayed in the OP.DATA menu.

  • Page 41: Starting Up

    Commissioning iTec Starting up Now it's time to start the system and do the final settings and adjustments. Starting the system Set the heat pump to the desired operating mode in the menu INFORMATION -> OPERAT. The following operating modes are available:...
  • Page 42 Commissioning iTec A high setting may result in noise and vibrations in the heating sys- tem. A too low setting may result in high pressure-, or low heat circulation flow alarms. Adjusting the speed for the constant-speed pump ▪ Start with maximum speed setting.

  • Page 43: Bleeding And Filling

    Commissioning iTec Bleeding and filling 1. Open all radiator valves fully. 2. Start the heat pump. 3. Listen for air in the system. 4. Refill the heating system to a pressure of min. 1 bar. 5. Repeat the procedure until all air has been removed.

  • Page 44: Tuning The System

    Commissioning iTec Tuning the system 11.1 Tuning the heating system To obtain a heating system balance and obtain an even and comfortable indoor temperature, the heating system may need adjustment according to the example below. The indoor temperature is adjusted by changing the heat curve. The heat curve calculates the supply temperature depending on the outdoor temperature.
  • Page 45 Commissioning iTec 1. Supply temperature (°C) 2. Maximum supply temperature 3. Outdoor temperature (°C) 4. 0°C 5. Value for CURVE is 40°C -2 0 Fig. 1: Graph showing the set value 40 for CURVE. In the event of outdoor temperatures below 0°C, a higher setpoint value is calculated and in the event of outdoor temperatures greater than 0°C, a lower setpoint value is calculated.
  • Page 46 Commissioning iTec 1. Supply temperature (°C) 2. Desired supply temperature 3. Outdoor temperature (°C) -2 0 Fig. 3: Changing the ROOM value changes the heat curve upwards or downwards The relationship of the supply temperature to the outdoor temperature will not be affected.

  • Page 47: Error Codes

    Commissioning iTec Error codes The error codes shown in the table below will be visible in the INDOOR UNIT display whenever an error is detected from the OUTDOOR UNIT. ALL errors will stop the compressor from running until the error is solved. Some errors are automatically cleared, some needs man- ual action and some severe errors might even need hardware to be replaced or serviced.
  • Page 48 Commissioning iTec Display Explanation Error source OUTDOOR UNIT fan 2 error OUTDOOR UNIT E475 H/W DC_Link over voltage error OUTDOOR UNIT 1, 4 E483 PFC overload error OUTDOOR UNIT E484 1, 4 Input current sensor error OUTDOOR UNIT E485 AC input voltage sensor error...

  • Page 49: Installation Protocol And Customer Info

    Commissioning iTec Installation protocol and customer info Fill in the Installation protocol in the User Guide. After installation and test operation, the customer must be informed about their new heat pump installation. In the User guide there is a checklist regarding the information that the installer must give the customer.
  • Page 50 Commissioning iTec VIJSR102 Thermia Värmepumpar...
  • Page 51 Commissioning iTec Thermia Värmepumpar VIJSR102...
  • Page 52 All trademarks in this material are property of the respective companies. Thermia Värmepumpar and the Thermia Värmepumpar logotype are trademarks of Danfoss A/S. All rights reserved.

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