Boiler controller S-Tronic Plus

Operating Instructions Boiler controller S-Tronic Plus Version 50.0 - Build 05.0 Translation of the original German operating instructions for technicians and operators Read and follow the instructions and safety informations! Technical changes, typographical errors and omissions reserved! B070210_en Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Contents Contents 1 General 5 1.1 About these instructions 5 1.2 Safety information 5 1.3 Before switching on for the first time 6 1.3.1 Controller check 6 1.3.2 Check on the connected units 6 1.3.3 System Check 6 2 Overview of the basic functions 7 2.1 Control keys and display 7 2.1.1 Navigation keys 7 2.1.2 Status LED 7 2.1.3 Graphic display 8 2.2 Function keys 9 2.2.1 Standby key 9 2.2.2 Service program key 9 Chimney sweeper function 9 2.2.3 Info key 9 2.2. DHW tank program key 10 2.2.5 Party program key 11 2.2.6 Setback program key 11 2.3 Operating statuses 12 3 Operation 13 3.1 Initial startup 13 3.1.1 Changing the operating level 13 3.1.2 Setting the system type 1 3.1.3 Before heating up for the first time 15 Drives 16 3.2 Heating up the boiler 16 3.2.1 Heating up 16 3.3 Setting parameters 17 3. Setting times 18 3..1 Deleting a time window 19 Menu overview and parameters 20.1 Menu - Heating 22.1.1 Status displays for the heating circuits 22.1.2 Temperature settings for the heating circuit 22.1.3 Heating times of the heating circuits 23.1. Service parameters of the heating circuits 2.1.5 Service parameters for heating up program 2 Heating up programs 25.1.6 General settings 26.2 Menu - Water 27.2.1 Status displays for the DHW tank 27.2.2 Temperature settings of the DHW tank 27.2.3 Heating times of the DHW tank 28 2 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Contents.2. Service parameters of the DHW tank 28.3 Menu - Solar 30.3.1 Status displays for the solar system 30.3.2 Temperature settings for the solar system 30.3.3 Service parameters of the solar system 31.3. Solar heat meter 32. Menu - Storage tank 33..1 Status displays of the storage tank 33..2 Temperature settings for the storage tank 33..3 Service parameters of the storage tank 3.5 Menu - Boiler 35.5.1 Status displays for the boiler 35.5.2 Temperature settings for the boiler 35.5.3 Service parameters of the boiler 36.5. General settings 36.6 Menu - Boiler 2 37.6.1 Status displays for the secondary boiler 37.6.2 Temperature settings of the secondary boiler 37.6.3 Service parameters for secondary boiler 38.7 Menu - Network pump 39.7.1 Status display of the network pump 39.7.2 Network pump temperature settings 39.7.3 Service parameters for the network pump 0.8 Menu - Difference regulator 1.8.1 Status displays for the difference regulator 1.8.2 Temperature settings for the difference regulator 1.8.3 Service parameters for the difference regulator 1.9 Menu - Circulation pump 3.9.1 Status display for the circulation pump 3.9.2 Temperature settings for the circulation pump 3.9.3 Time settings for the circulation pump.9. Service parameters of the circulation pump.10 Menu - Manual 5.10.1 Digital outputs 5.10.2 Analogue outputs 5.10.3 Digital inputs 6.11 Menu - System 7.11.1 Settings 7 Setting parameters Boiler temperature 7 Adjustable parameters Flue gas 7 Adjustable parameters Air settings 8 General settings 8.11.2 Current values 9.11.3 Error list 9.11. Parameters for sensors and pumps 9.11.5 Display operating rights 50.11.6 Display allocations 51.11.7 Basic display parameters 51.11.8 Changing languages 52.11.9 Changing the date 52.11.10 Changing the time 52.11.11 Standard settings 52.11.12 Current user level 52.11.13 System type 53 Operating Instructions S-Tronic Plus B070210_en 3

Contents 5 Troubleshooting 5 5.1 Procedure for fault messages 5 6 Electrical connection and wiring 56 6.1 Core module 56 6.1.1 Connection instructions 56 6.1.2 Mains connection 57 6.1.3 Connecting the flue gas sensor 57 6.1. Combination with oil burner 58 6.1.5 Connecting the remote control 58 6.2 Expansion modules 60 6.2.1 Heating circuit module 60 6.2.2 Hydraulic module 61 6.2.3 Return mixer module 62 6.2. Connecting the bus cable 62 6.2.5 Setting end jumpers 63 6.2.6 Setting the module address 63 7 Setting protocol 6 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

General About these instructions 1 1 General 1.1 About these instructions Be sure to read and comply with the operating instructions, particularly the safety information they contain Keep them available next to the boiler. These operating instructions include important information about operation, electrical connection and troubleshooting for the S-Tronic Plus controller. NOTICE The values given in the parameter lists are examples, and should not be used as standard values. 1.2 Safety information The constant further development of our products means that there may be minor differences from the pictures and content. If you discover any errors, please let us know. All errors and omissions excepted. DANGER When working on electrical components: Risk of electrocution! When work is carried out on electrical components: Only have work carried out by a qualified electrician Observe the applicable standards and regulations Work must not be carried out on electrical components by unauthorised people WARNING When touching hot surfaces: Severe burns are possible on hot surfaces and the flue gas pipe! When work is carried out on the boiler: Shut down the boiler in a controlled way (operating status "Off") and allow it to cool down Protective gloves must generally be worn for work on the boiler, and it should only be operated using the handles provided Insulate the flue pipes or simply avoid touching them during operation. The information on safety, standards and guidelines in assembly and operating instructions for the boiler should also be observed. Operating Instructions S-Tronic Plus B070210_en 5

1 General Before switching on for the first time 1.3 Before switching on for the first time 1.3.1 Controller check NOTICE You should have the initial startup carried out by the authorised heating engineer from Froling customer services. Check boards for foreign bodies (pieces of wire, washers, screws...) Carry out a wiring check: Check for loose, uninsulated wires, which could cause a short-circuit Check plug arrangement of pumps, mixers and other units, which have NOT been prepared by Froling Check the connection of the BUS cable for short-circuits Check the specified addresses and terminal jumpers on the individual modules (heating circuit modules, hydraulic modules, displays ) 1.3.2 Check on the connected units 1.3.3 System Check Check that all units that are used are connected correctly Carry out a wiring check: Check for loose or uninsulated wires in the terminal boxes of the pumps, mixer and switch valve, which could cause a short-circuit Check that the main fuse for the boiler has a sufficient rated amperage ( 16A ) If a safety overload switch is used, it should be a type with 16A. 6 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Overview of the basic functions Control keys and display 2 2 Overview of the basic functions 2.1 Control keys and display Function keys Graphik display Navigation keys 2.1.1 Navigation keys Status-LED The navigation keys are used for moving in the menu and changing parameter values Key Function for Navigation: Move up in the menu UP arrow Parameter change: Depending on the duration of the key press: - short: Increase value - long: Increase value in steps of 10 - long (>10 seconds): Increase value in steps of 100 Navigation: Move down in the menu DOWN arrow Parameter change: Depending on the duration of the key press: - short: Decrease value - long: Decrease value in steps of 10 - long (>10 seconds): Decrease value in steps of 100 Navigation: Go to selected menu Enter key Parameter change: Release the parameter for editing, or save parameter value after changing Navigation: Go back to higher menu Back key 2.1.2 Status LED Parameter change: Depending on the duration of the key press: - short: Do not save parameter - long: Back to basic display without saving The status LED shows the operating status of the system: GREEN flashing (Interval: 5 sec. OFF, 1 sec. ON): Off GREEN constant: BOILER SWITCHED ON ORANGE flashing: WARNING RED flashing: ALARM Operating Instructions S-Tronic Plus B070210_en 7

2 Overview of the basic functions Control keys and display 2.1.3 Graphic display 1 Heating 08:05 Boiler 75 C Flue gas 150 C 5 6 7 8 9 10 11 12 2 3 Item 1 Shows operating status or menu name 2 Shows the current time 3 Displays the main values in the basic display (adjustable), menu contents, parameters and info texts Status symbol line 5 Displayed when a fault is pending. Press the info key to display texts describing the fault and the solution. 6 Shows the storage tank loading status (storage tank is optional) 7 Indicates that an info text is displayed. Info texts are also identified by a frame 8 Shows which function is active See "Function keys" [page 9] 9 Shows that the DHW tank loading pump is active. Only 10 Shows that the storage tank loading pump is active. shown in the basic display. 11 Shows that the heating circuit pump of the 2nd heating circuit is active 12 Shows that the heating circuit pump of the 1st heating circuit is active. At the service technician operating level the function of the relevant components is shown in the individual status menus by the corresponding status display: Ite m A B C D Shows whether the storage tank (or oil boiler) is hot enough for hot water preparation Shown when the DHW tank or return temperature control pump is active. Shown when the heating circuit or storage tank loading pump is active. Shows the status of the heating circuit mixer. Only for service technicians in the status menus 8 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Overview of the basic functions Function keys 2 2.2 Function keys 2.2.1 Standby key The function keys of the S-Tronic Plus have dual functions. Different functions can be called with long or short keystrokes, using the following definitions of keystroke duration: Short keystroke.. < 1 second Long keystroke.. > seconds Keystroke Function Heating 08:02 BOILER ON Automatic mode started Heating circuits and domestic hot water are controlled according to the programs and times set. Function remains active until another function key is pressed. 2.2.2 Service program key Keystroke Shor t Heating 08:02 BOILER ON Chim. sweep mode started Function The system is operated at rated load for a period of 5 minutes. See "Chimney sweeper function" [page 9] Lon g Function not used Chimney sweeper function 2.2.3 Info key The chimney sweeper function is used for measuring boiler emissions using the chimney sweeper. For further information and procedure for measuring emissions, see the operating instructions of the boiler. Press the service program key The boiler is operated for 5 minutes at rated load The boiler temperature setpoint is set to 85 C The heating pumps switch on and the mixer valves regulate to the maximum flow temperature setpoint DHW tank and storage tank loading pump are controlled as normal Keystroke Shor t Heating 08:02 === BASIC DISPLAY === Menu keys >>>> 2 >>>>Function keys 3 Basic Display 9 Function Shows clear text information on the menu items or fault messages. Lon g Choose language: Deutsch, Polski, Cesky, Slovenski, Italiano, Francais, English Operating Instructions S-Tronic Plus B070210_en 9

2 Overview of the basic functions Function keys The info key can be pressed at any time and always shows information about the current menu item or the current fault message, with fault messages occupying the highest priority. Info key in normal mode: In normal operation (without pending fault messages) the info key can be pressed to display information or an explanation for every menu item or parameter. The info text is also identified by the frame and the info symbol on the status line. Info key when there is a pending fault: If a fault has been acknowledged after arising, but not resolved, this is shown by a warning symbol at the bottom right on the status line. Pressing the info key calls up the information on the currently pending fault message again. Procedure for troubleshooting: See "Troubleshooting" [page 5] 2.2. DHW tank program key Keystroke Shor t Lon g Heating 08:02 BOILER ON Extra DHW loading started Heating 08:02 BOILER ON Summer mode started Function Single manual loading of domestic hot water. The function is indicated during DHW tank loading by the tap symbol on the status line. After loading, the mode that was previously set becomes active again. To change to summer mode. The mode is indicated by the tap symbol on the status line. Domestic hot water loading is controlled according to the program that is set, the heating circuit controller is deactivated. Caution: Frost protection function not active! 10 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Overview of the basic functions Function keys 2 2.2.5 Party program key Keystroke Shor t Lon g 2.2.6 Setback program key Heating 08:02 PARTY MODE is not possible in boiler display! Heating 08:02 BOILER ON Extraheating started Function To activate party mode on the room console. Caution: Function only possible on the room console! After an optional change to the room temperature setpoint, the heating circuit controller remains in heating mode until the end of the next heating period or another mode is activated. This function is not possible in summer mode! Observe the additional information in the operating instructions of the room console. During extra heating, heating and domestic hot water are heated for 6 hours. The mode set is ignored. The function is indicated by the sun symbol on the status line. Caution: The external temperature heating limit set in the "Heating" menu is active and can prevent release of the heating circuits. Keystroke Shor t Lon g Heating 08:02 Setback MODE is not possible in boiler display! Heating 08:02 CONTINUOUS setback MODE is not possible in boiler display! Function To activate setback mode on the room console. Caution: Function only possible on the room console! After an optional change to the setback temperature the heating circuit controller remains in setback mode until the start of the next heating time or until activation of another mode. Observe the additional information in the operating instructions of the room console. To activate continuous setback mode on the room console. Caution: Function only possible on the room console! The room temperature is reduced to the preset setback temperature until automatic mode is activated. Observe the additional information in the operating instructions of the room console. Operating Instructions S-Tronic Plus B070210_en 11

2 Overview of the basic functions Operating statuses 2.3 Operating statuses The different operating statuses are displayed at the top left of the graphic display: Heating up Heating Slumber Door open Off Fault Boiler status during the heating up process up to a certain minimum flue gas temperature. Blower fan to 100%. The S-Tronic Plus controls combustion according to the boiler setpoints Very low power consumption. When the boiler temperature setpoint is exceeded by a specified value, the boiler goes to "Slumber" status. The blower fan stops. If the temperature falls below the boiler temperature setpoint the boiler goes back to "Heating" status". The insulated door is open, the blower fan runs at maximum speed. The boiler burns down to residual embers. CAUTION Warning or fault For procedure for warnings and faults see Section 5 See "Troubleshooting" [page 5] 12 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Operation Initial startup 3 3 Operation 3.1 Initial startup Before the initial startup check the wiring of the pumps and mixers is correct. See "Before switching on for the first time" [page 6] Check that the connected components have maximum connected load. See "Core module" [page 56] or See "expansion modules" [page 60] After power up and when the main switch has been switched on, the start logo is displayed and the controller carries out a system check. After the system check the basic display is shown. The basic display is shown as standard, giving information about the two most important parameters, and the display can be adjusted individually. See "Basic display parameters" [page 51] 3.1.1 Changing the operating level For safety reasons individual parameters are only visible at specific operating levels. To change to another level it is necessary to enter the relevant user code: repeatedly repeatedly Operating level Child lock (Code 0) Customer (Code 1) Installer / Service At "Child lock" level, only the basic display is shown. It is not possible to change parameters at this level. Standard level for normal operation of the controller. All customer-specific parameters are displayed and can be changed. Releases parameters to adjust the controller to the system components (if configured). All the parameters shown in these operating instructions are available. Operating Instructions S-Tronic Plus B070210_en 13

3 Operation Initial startup 3.1.2 Setting the system type NOTICE! Only for trained personnel - the installer code must be entered! repeatedly Boiler Type Boiler type Caution! Incorrect settings can lead to faults. Further on with the down arrow button. S3 Turbo S Turbo FHG Turbo 3000 20 : FHG Turbo 3000 70 Pellet boiler P2-10 Selected : Do not select S Turbo, FHG Turbo 3000, P2, P Pellet,...! Pellet boiler P2-25 P Pellet 8-25 P Pellet 32-60 TURBOMATIC 28-55 TURBOMATIC 70-100 T TX 150 Wood boiler F2 22/30 Boiler type parameters Return feed lift pump installed Return mixer using HC1 Return mixer using external mixer module NO NO NO 1 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Operation Initial startup 3 System selection System selection Hydraulic system 0 Hydraulic system 1 Hydraulic system 2 Hydraulic system 3 Hydraulic system SELECT! For descriptions see brochure Energy systems S-Tronic Plus Hydraulic system for S3 boiler SELECTED SELECT! Hydraulic system 12 Hydraulic system 13 SELECT! For descriptions see brochure Energy systems S-Tronic Plus Variant 1 Variant 2 and 5 Variant 3 Variant Slave boiler in the cascade Systems only for multiple house systems! Just at installations in cascade connection. Is any secondary boiler installed? Y/N Middle storage tank temperature sensor installed Standby boiler blocking off Isolating valve installed DHW priority Additional freely programmable differential controller installed Network pump installed Sec. circ. pump installed Y/N Y/N Y/N Y/N Y/N Y/N Y/N Hydraulic system... DHW tank system DHW tank 01 installed J/N... DHW tank 08 installed J/N... Heating circuit systm Heating circuit 01 installed J/N Remote control 01 installed J/N... Heating circuit 18 installed Remote control 18 installed J/N J/N... Solar panel system Solar collector 01 installed J/N 3.1.3 Before heating up for the first time Check the system pressure of the heating system Operating Instructions S-Tronic Plus B070210_en 15

3 Operation Initial startup Check that the heating system is completely vented Check if the safety devices are present and working correctly Checking to see whether sufficient ventilation and venting of the boiler room is guaranteed. Check the seal of the boiler All doors and inspection openings must be tightly sealed! Drives Door switch Check the door contact switch is working correctly. See "Digital inputs" [page 6] Check that drives and actuators are working and turning in the right direction See "Analogue outputs" [page 5] and See "Digital outputs" [page 5] 3.2 Heating up the boiler 3.2.1 Heating up When starting up for the first time ensure that the combustion chamber heats up slowly. Information on safety and implementation in the operating instructions of the boiler must be observed. NOTICE! See chapter on Initial Startup in the assembly instructions of the boiler Door open 08:00 Boiler 25 C ID Fan ON Door open 08:00 Boiler 25 C ID Fan OFF Heating up 08:01 Boiler 25 C Flue gas 26 C Heating 08:15 Boiler 60 C Flue gas 180 C 1 2 3 Item 1 When the insulated door is opened the status, "Door open", is shown on the display and the basic display is replaced by the flue gas temperature and the parameter, "ID fan". The parameter is automatically set to "ON" and the ID fan is activated at maximum speed. 2 The ID fan can be switched on and off with the arrow keys. NOTICE! When igniting the paper, it is advisable to turn off the induced draught fan and to turn it on again afterwards. Fill the boiler with fuel and ignite it following the boiler operating instructions 3 After closing the insulated door the boiler switches automatically to "Heating up" status. The S-Tronic Plus activates the induced draught at 100%. When a specific flue gas minimum temperature is reached or when the specified maximum heating up time has elapsed, the boiler changes to "Heating" status. The S-Tronic Plus controls the combustion according to the boiler setpoints that have been set. Off 09:35 Boiler 30 C Flue gas 38 C 5 5 If the criteria for "Heating" status are not reached within a specified time, the boiler switches to "Off" status. 16 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Operation Setting parameters 3 3.3 Setting parameters Values for all parameters are changed in the following way: Save value and go back Unlock parameter for processing larger Navigate to the desired parameter smaller Back without saving For initial startup the following parameters should be checked and adjusted if required: Heating curve: Radiator or floor heating The other parameters are factory set in such a way that in most cases optimal operation is possible without making further changes to the parameters. The following parameters, however, can/should be set as desired by the customer: Desired boiler setpoint DHW tank loading times Solar controller Heating and setback times of the individual heating circuits Operating Instructions S-Tronic Plus B070210_en 17

3 Operation Setting times 3. Setting times The desired time window for the components can be set in the "Times" submenu in the individual menus of the heating components (heating circuits, DHW tanks...). The structure of the time menu and the procedure for changing the times are always the same. Example - Setting times for heating circuit 01: In the "Heating" menu -> "Times": Current settings for the individual weekdays are displayed. Pressing the arrow keys changes to the next/previous weekday See example below The factory set times are loaded by confirming again. (06:00 22:00) Caution - the customer specific time settings are lost in the process! In the "Change program" menu: After pressing the enter key you can select the day or the time period, for which the heating times are to be set: - MO, TU,.., SU - MO - FR - SA - SU - SAME ALL DAYS After pressing the enter key again the time window for the desired day/time period is displayed. Up to different heating times can be entered consecutively here. When the enter key is pressed, the cursor jumps to the next position, even if no time has been entered. If the cursor is in the last position, pressing the enter key saves the time window and switches to the previous menu 18 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Operation Setting times 3 3..1 Deleting a time window To delete a time window, the end time of the desired time window must be put to 2:00. If you press the up arrow key repeatedly the time disappears and is replaced by dashes. Then carry out the same process with the start time. After the enter key has been pressed repeatedly, the changes are adopted and it returns to the previous menu. Operating Instructions S-Tronic Plus B070210_en 19

Menu overview and parameters Menu overview and parameters See "Menu - Heating" [page 22] See "Menu - Water" [page 27] See "Menu - Solar" [page 30] See "Menu - Storage tank" [page 33] See "Menu - Boiler" [page 35] See "Menu - Boiler 2" [page 37] See "Menu - Network pump" [page 39] See "Menu - Difference regulator" [page 1] See "Menu - Circulation pump" [page 3] 20 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Menu overview and parameters See "Menu - Manual" [page 5] See "Menu - System" [page 7] Operating Instructions S-Tronic Plus B070210_en 21

Menu overview and parameters Menu - Heating.1 Menu - Heating.1.1 Status displays for the heating circuits Heating circuit 01... 18 Parameter Control heating circuit according to program (NO -> heating circuit is switched off) YES NO -> Heating circuit is completely switched off. No frost protection! Actual flow temperature 6 C Shows the current flow temperature Flow temperature setpoint 52 C The calculated flow temperature setpoint Room temperature 21 C Temperature on remote control of the current heating circuit (option) Override switch Auto Shows the current switch setting on the remote control (option) (Party) = Party mode; the setback program is ignored (Setback) = setback mode; the heating phases are ignored (Auto) = Automatic mode; heating phases according to setback program (Off) = Switched off; heating circuit deactivated, only frost protection! External temperature 2 C Shows the current external temperature.1.2 Temperature settings for the heating circuit Heating circuit 01... 18 Parameter Desired room temperature during heating mode Desired room temperature during setback mode 20 C Room temperature during heating mode (only with remote control) 16 C Room temperature during setback mode (only with remote control) 22 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Menu overview and parameters Menu - Heating Parameter Flow temperature SP at external temperature of +10 C 0 C The heating curve to the relevant system can be adjusted with these two work points. Flow temperature SP at external temperature of -10 C 60 C Flow temperature 90 80 70 60 50 0 30 Example of floor heating Example of radiators 20-15 -10-5 0 5 10 15 20 External temperature Controller gain room temperature Kp-Rm Reduction of flow temperature in setback mode External temperature, at which heating circuit pump switches off in heating mode External temperature, at which heating circuit pump switches off in setback mode 6.0 Influencing factor of room temperature on the flow temperature of the heating circuit. If there is a deviation in the room temperature of +/- 1 C the set value of the flow temperature is corrected by this value. (Parameter only with optional remote control!) Recommended values for: - Floor heating 2-3 - Radiators (new build): 5 - Radiators (old build): 6 7 Notice:Observe external influences on the room sensors! 15 C The flow temperature is reduced by this value during setback mode. 18 C If the external temperature exceeds this value during heating, the heating circuit pumps and mixer are deactivated. 7 C If the external temperature falls below this value in setback mode, the heating circuit pumps and mixer are activated. Maximum flow temperature 75 C Maximum temperature for limiting flow temperature. Frost protection temperature 10 C If the room temperature or the flow temperature is lower than the set value, the heating circuit pump will be switched on..1.3 Heating times of the heating circuits Heating circuit 01... 18 repeatedly See "Setting times" [page 18] Operating Instructions S-Tronic Plus B070210_en 23

Menu overview and parameters Menu - Heating.1. Service parameters of the heating circuits Heating circuit 01... 18 repeatedly Parameter Heating circuit pump A 0 Used for testing the individual outputs. Heating Circuit Mixer OPEN A 0 See "Menu - Manual" [page 5] Heating Circuit Mixer CLOSED A 0 Mixer runtime 20s Set mixer runtime of heating circuit mixer in use. Recommendation to reduce mixer vibration: Do not set to < 150s Switch off heating circuit pump when outfeed setpoint is lower than 20 C If a flow temperature setpoint is calculated below the value set here, the heating circuit pump switches off the heating circuit pump and the mixer closes. (only without remote control) Should this heating circuit heat when there is DHW boiler priority? (DHW tank) NO Generally the heating circuits are released with active DHW tank priority only when the DHW tank is fully charged. If this parameter is set to "YES", the DHW tank priority for this heating circuit is deactivated. From which storage tank or distributor is the heating circuit supplied (0 = boiler) 1 NOTICE: Only valid for multiple house systems (variants). Allocation of the heating source for this heating circuit: 0 = Boiler, 1 = Storage tank 01,....1.5 Service parameters for heating up program Parameters Heating up program active NO If this parameter is activated, the 30-day program that has been set starts. After the 30 days the heating circuit that has been set is operated normally again. Current day of the heating up program For which heating circuit should the program apply 1 Shows the current day of the heating program that is running 1 This parameter determines which heating circuit is supplied by the heating up program. Heating circuit 1... 18 Only one heating circuit can be selected. Which heating up program is used 1 There are set options for the progression of the flow temperature in heating up programs 1 6. With heating up program 7 the flow temperature can be selected freely. See "Heating up programs" [page 2] Outfeed setpoint for all days in program 7 35 C If heating up program 7 is active, the selected heating circuit is adjusted to the specified flow temperature. 2 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Menu overview and parameters Menu - Heating Heating up programs Heating up program 1: Heating up program 5: 55 50 5 55 50 5 Flow temp. setpoint [ C] 0 35 30 25 20 15 Flow temp. setpoint [ C] 0 35 30 25 20 15 10 10 5 5 0 1 6 11 16 21 26 30 0 1 6 11 16 21 26 30 Day Day Heating up program 2: Heating up program 6: 50 60 5 55 Flow temp. setpoint [ C] 0 35 30 25 20 15 10 Flow temp. setpoint [ C] 50 5 0 35 30 25 20 15 10 5 5 0 1 6 11 16 21 26 30 0 1 6 11 16 21 26 30 Day Day Heating up program 3: Heating up program 7: 50 0 5 35 Flow temp. setpoint [ C] 0 35 30 25 20 15 10 Flow temp. setpoint [ C] 30 25 20 15 10 5 5 0 1 6 11 16 21 26 30 0 1 6 11 16 21 26 30 Day Day Heating up program : 5 0 35 Flow temp. setpoint [ C] 30 25 20 15 10 5 The heating up programs listed are non-binding recommendations. If the heating up program is to be used for floor screed drying, you must consult the manufacturer of the floor finish and/or the installer 0 1 6 11 16 21 26 Day 30 Operating Instructions S-Tronic Plus B070210_en 25

Menu overview and parameters Menu - Heating.1.6 General settings repeatedly Correction value for external sensor Parameter Heating circuit modul to which the external sensor is connected (0 = Core modul) 0 C If the external sensor shows an incorrect value, the value can be adjusted using this parameter. 0 If the external sensor is not connected to the core module, the address of the relevant module must be set here. (Sensor 1 on relevant module) 26 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Menu overview and parameters Menu - Water.2 Menu - Water.2.1 Status displays for the DHW tank DHW tank 01... 08 Parameters DHW tank top temperature 60 C Current temperature in the top part of the DHW tank. The DHW tank is heated during the loading times until the specified parameter, "Set DHW temperature", is reached. DHW tank bottom temperature 55 C Current temperature in the lower part of the DHW tank. (parameter only available with solar element) DHW tank pump control 0% Specifies the speed of the DHW tank pump as a percentage of maximum speed.2.2 Temperature settings of the DHW tank DHW tank 01... 08 Parameter Set DHW temperature 55 C When this DHW tank temperature is reached the DHW tank loading pump switches off. Reload if DHW tank temperature is below Load if temperature difference between storage tank and DHW tank is Load if temperature difference between boiler and DHW tank is 5 C Reloading of the DHW tank is authorised when the DHW tank temperature is below this level. 6 C When the storage tank top temperature is above the DHW tank temperature by this value, the DHW tank loading pump is released. (Only for systems with storage tanks) 6 C Initial value of DHW tank loading. The boiler temperature must be higher than the DHW tank temperature by this value so that the DHW tank loading process begins. (Only for systems without storage tanks) Operating Instructions S-Tronic Plus B070210_en 27

Menu overview and parameters Menu - Water.2.3 Heating times of the DHW tank DHW tank 01... 08 repeatedly See "Setting times" [page 18].2. Service parameters of the DHW tank DHW tank 01... 08 repeatedly Parameter DHW tank 1 pump will be controlled from HCP0 NO This parameter must be set to "YES" if no additional hydraulic module is used, however a DHW tank must be activated. NOTICE: Return sensor = DHW tank sensor, HCP0 = DHW tank pump NOTICE: The DHW tank can only be loaded using HCP0 if no return mixer is used. NOTICE: Function only possible with "hydraulic system for S3 Turbo" selected. Residual heat use NO Function can only be used for systems without storage tank and in combination with bypass pump/ return mixer. The residual energy is diverted to the DHW tank, the parameter "Pumps start at" is ignored. The pump is activated at minimum speed until the boiler temperature is lower than the DHW tank temperature + 3 C. Only load DHW tank once a day NO If this parameter is set to "YES", repeated heating on one day is prevented. Legionella heating activated YES The DHW tank is heated to at least 65 C once a week. Which day for legionella heating MO Day of the week on which the Legionella heating is carried out. Which storage tank or heat distributor supplies the heat to this DHW tank (0 = boiler) 1 When using several storage tanks or heat distributors, the source of heat for DHW tank loading is selected here. If only one storage tank or heat distributor is used, leave the parameter on the standard setting of 1. NOTICE: Only valid for multiple house systems. DHW tanks run-on (this parameter applies for all DHW tanks) 0m Run-on time for all DHW tanks Minimum DHW tank speed 5% Adjustment of the minimum speed to the pump type. NOTICE:Set the pump switch to the highest power level (only when the pump is disconnected from the power supply). NOTICE: If the DHW tank is loaded using HCP0, this parameter is ignored. Which sensor is used for top DHW tank 1 0.3 Bus address of the sensors and pumps used. See "Setting the module address" [page 63] 28 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Menu overview and parameters Menu - Water Parameter Which sensor is used for bottom DHW tank 1 0. Which pump is used for DHW tank 1 0.2 NOTICE: If the DHW tank is charged using HCP0, the parameters "Which sensor is used for top DHW tank 1" and "Which pump is used for DHW tank 1" are ignored. Operating Instructions S-Tronic Plus B070210_en 29

Menu overview and parameters Menu - Solar.3 Menu - Solar.3.1 Status displays for the solar system Parameter Collector Temperature 80 C Current temperature at collector. Solar temperature storage tank bottom 3 C Current temperature at solar sensor at bottom of storage tank. DHW tank bottom temperature 39 C Current temperature at the solar reference sensor in the DHW tank. Collector pump runtime 1h Specifies the runtime of the collector pump. Collector pump control 52% Specifies the speed of the collector pump as a percentage of maximum speed. Outfeed: 0 C / Return: NA P: 0.0 kw / DFL: 0 Today: 0 kwh Total: 0 kwh Solar heat meter: Outfeed: Flow temperature of the solar system Return: Return of the solar system P: Current output of the solar system DFL: Flow-through of the solar system Today: Heat quantity that has been supplied by the solar system today Total: Heat quantity that has been supplied since activation of the solar system.3.2 Temperature settings for the solar system Parameter Boiler target temperature during solar charging (DHW tank) Temp differential to start collector pump Temp difference to stop collector pump Maximum storage tank bottom temperature during solar charging 75 C Up to this temperature the DHW tank is heated by the solar system 10 C The collector loading pump activates when the collector temperature exceeds the storage or DHW tank temperature by this value 5 C The collector loading pump switches off when the collector temperature exceeds the storage or DHW tank temperature by this value 85 C Maximum bottom storage tank temperature at which the collector pump is switched off (only with storage tank). Minimum collector temperature 20 C Below this collector temperature the collector pump is switched off. 30 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Menu overview and parameters Menu - Solar.3.3 Service parameters of the solar system repeatedly Parameter Solar system 1 Specifies the type of solar system. The parameter should be set according to the solar diagram. Observe the information on the solar system in the "S-Tronic Plus energy systems" documents. Minimum collector pump speed 5% Adjusting the minimum speed to the relevant pump type. NOTICE: Set the pump switch to the highest power level (only when the pump is disconnected from the power supply). Collector monitoring Collector pump is switched on every 30 min. for 10 sec For solar to store and DHW tank, the DHW tank has priority NO YES If this parameter is active the collector pump is switched on every 30 minutes for 10 seconds. If the collector sensor detects an increase in temperature, the pump is kept on. This function is active from 10:00am - 7:00pm and the threshold value of the collector temperature, from which this function is active, is dynamically adjusted. YES: The DHW tank is charged until the temperature setpoint is reached, and only then is the storage tank supplied. NO: The DHW tank is charged until the temperature difference between the collector and the DHW tank is no longer sufficient. When the temperature difference has fallen too low, the storage tank is supplied with heat for 20 minutes. Then the collector pump is stopped for 20 minutes and a check is carried out to see if the temperature difference is now sufficient for DHW tank charging. Solar charging to which store 1 Defines the storage tank to which the solar charging takes place. Solar charging to which DHW tank 1 Defines the DHW tank to which the solar charging takes place. Which sensor is used for the solar collector Which sensor is used for the storage tank reference Which pump is used for the solar collector Which pump is used for the solar isolating valve 1.1 Bus addresses of the sensors used, depending on the system 0.2 See "Setting the module address" [page 63] Observe the information on the solar system in the "S-Tronic Plus energy systems" documents. 1.1 Bus address of the pump that is used. 1.2 See "Setting the module address" [page 63] Observe the information on the solar system in the "S-Tronic Plus energy systems" documents. Invert isolating valve NO For DHW tank loading through the collector, the isolating valve is activated with 230V. If the valve switches incorrectly, the way it is controlled can be adjusted using this parameter. Is a PT1000 sensor used as a solar sensor? NO Basic setting for the sensor type used: NO: Standard solar sensor - Froling YES: Sensor PT1000 Nominal flow of collector pump for heat meter [L/h] Which sensor is used for the collector return 0 Set the nominal flow of the collector pump used. 1.5 Bus addresses of the sensors used, depending on the system See "Setting the module address" [page 63] Operating Instructions S-Tronic Plus B070210_en 31

Menu overview and parameters Menu - Solar.3. Solar heat meter repeatedly Parameter Outfeed: 0 C / Return: NA P: 0.0kW / DFL: 0 Today: 0 kwh Total: 0 kwh Nominal flow of collector pump for heat meter [L/h] Solar heat meter: Outfeed: Flow temperature of the solar system Return: Return of the solar system P: Current output of the solar system DFL: Flow-through of the solar system Today: Heat quantity that has been supplied by the solar system today Total: Heat quantity that has been supplied since activation of the solar system 0 Set the nominal flow of the collector pump used Pulses per litre from the flow sensor 1.0 If an external flow meter is used, adjust this value in accordance with the device used. [0.5 5 pulses/l] Which sensor is used for the collector return Which sensor is used for heat meter flow temperature Is an external flow through counter used 1.5 Bus addresses of the sensors used, depending on the system See "Setting the module address" [page 63] 1.3 If a flow sensor is used for the heat meter in addition to the collector sensor, set the sensor address appropriately Bus addresses of the sensors used, depending on the system See "Setting the module address" [page 63] NO 32 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Menu overview and parameters Menu - Storage tank. Menu - Storage tank..1 Status displays of the storage tank Storage tank 01... 0 Parameter Storage tank top temperature 58 C Current temperature at top storage tank sensor. Storage tank middle temperature 53 C Current temperature at middle storage tank sensor (depending on configuration). Bottom storage tank temperature 50 C Current temperature at bottom storage tank sensor. Store pump control 50% Specifies the speed of the storage tank pump as a percentage of maximum speed. Store charge 25% Only for the master boiler in the cascade group or system. shows the current storage tank charge...2 Temperature settings for the storage tank Storage tank 01... 0 Parameter Heating circuit release from following storage tank temperature Temperature difference between boiler and border layer Storage tank fully loaded if temperature difference between boiler and bottom storage tank Top store temp. when the start-up relief valve switches to bottom store 30 C Minimum value of storage tank top temperature for heating circuit release in combination with a storage tank 20 C If the option, "Middle storage tank temperature sensor installed" and the parameter, "Mid store controller active" have been set to "YES", the controller attempts keep the temperature of the "middle store" sensor to the value of the boiler temperature setpoint minus the temperature difference set here, by regulating the speed of the storage tank pump. 10 C Temperature difference between boiler and storage tank temperature to release storage tank loading. 60 C If the temperature set is exceeded at sensor 0.1 the start relief valve switches to bottom storage tank Operating Instructions S-Tronic Plus B070210_en 33

Menu overview and parameters Menu - Storage tank..3 Service parameters of the storage tank Storage tank 01... 0 repeatedly Parameter Enable heating circuit pump 0 according to top store NO NO: Release of heating circuit pump 0 from boiler temperature See "Temperature settings for the boiler" [page 35] Parameter, "Minimum boiler temperature to release all pumps". YES: Release of heating circuit pump 0 from top storage tank temp. See "Temperature settings for the storage tank" [page 33] Parameter, "Heating circuit release from following storage tank temperature" Minimum storage tank pump speed 35% Adjustment of the minimum speed to the pump type. NOTICE: Set the pump switch to the highest power level (only when the pump is disconnected from the power supply). Residual heat use NO The residual energy is diverted to the DHW tank, the parameter "Pumps start at" is ignored. The pump is activated at minimum speed until the boiler temperature is lower than the bottom storage tank temperature + 3 C. Mid store controller active? If No the sensor is only a display. NO NO Middle storage tank temperature sensor is used to display the temp. YES Middle storage tank temperature sensor is used for the border layer loading function. Which sensor is used for storage tank top Which sensor is used for bottom storage tank Which pump is used for the storage tank 0.1 Parameter display depends on the system. 0.2 0.1 Observe the information on the hydraulic system in the "S-Tronic Plus energy systems" documents. Pump outlet for store relief valve 6.1 3 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Menu overview and parameters Menu - Boiler.5 Menu - Boiler.5.1 Status displays for the boiler Parameters Boiler temperature 80 C Display of the current values for the relevant parameter Flue gas temperature 176 C : Flue gas setpoint 178 C : Boiler control variable 95% ID fan control 80% ID fan speed 2350U Sensor 1 127 C Return sensor 58 C.5.2 Temperature settings for the boiler Parameter Boiler temperature setpoint 80 C The boiler temperature is regulated to this temperature. Shutdown if current boiler temperature is higher than boiler setpoint + Always switch off at maximum boiler setpoint + Minimum boiler temperature to release all pumps 5 C If the boiler temperature falls below the target value by this parameter value, the boiler switches to "slumber" status. 3 C If the boiler temperature exceeds the maximum setpoint by this parameter, the boiler switches to "slumber" status. The heating circuit and store loading pump will also begin to run to cool the boiler. 65 C The pumps are released at this boiler temperature. (Hysteresis 2 C) Minimum return temperature 60 C The minimum temperature required of the return to the boiler. Operating Instructions S-Tronic Plus B070210_en 35

Menu overview and parameters Menu - Boiler.5.3 Service parameters of the boiler repeatedly Parameter Mixer runtime 20s Set mixer runtime of the mixer in use. Recommendation to reduce mixer vibration Do not set to < 150s Output fire off message using HKP0 NO If the boiler changes to "Off" status, the HKP0 output is closed..5. General settings repeatedly Parameter Modem installed NO If the boiler has a modem for data transfer, this value must be set to "YES". Memory cycle of data logger 5s Leave the value! This is the memory cycle used for saving data onto the data logger. COM 2 is used as a MODBUS interface NO YES: The COM 2 interface can be used for connection with a MODBUS (RTU / ASCII) NO: The COM 2 interface sends the most important boiler values every second MODBUS address 2 Adjustable parameter for MODBUS MODBUS Protocol (1 RTU / 2 ASCII) 1 36 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Menu overview and parameters Menu - Boiler 2.6 Menu - Boiler 2.6.1 Status displays for the secondary boiler Temperature of secondary boiler Parameters 23 C Display of the current boiler temperature of the secondary boiler Burner relay status 0 Shows the current status of the burner relay Manual standby boiler start (only when ID fan is switched off) OFF When the parameter is activated the secondary boiler starts. Caution! Burner blockage noted..6.2 Temperature settings of the secondary boiler Parameters Standby boiler start delay 10m Start delay of the burner relay if the boiler fails (the boiler status is off, fault or shut down and the boiler temperature is 5 C below the setpoint). In storage mode the burner relay, however, only comes on when the storage tank has cooled down. (Top storage tank temperature is lower than the highest required temperature) Standby boiler start, if storage tank top temperature is below 20 C Temperature at the top of the storage tank, which the temperature must fall below for the secondary boiler to be released Standby boiler minimum runtime 5m Standby boiler minimum runtime Minimum temperature of standby boiler Temperature difference between standby boiler and storage tank 55 C Minimum temperature of the standby boiler for release of secondary boiler unloading output. 10 C Minimum temperature difference between standby boiler and storage tank, which releases secondary boiler unloading output. Oil valve shut delay 30s The switching back of the switch valve is delayed by the specified time. Standby boiler delivery temperature 95 C If the secondary boiler exceeds the specified temperature, the switching valve switches and skims the boiler (only with hydraulic system 3) Operating Instructions S-Tronic Plus B070210_en 37

Menu overview and parameters Menu - Boiler 2.6.3 Service parameters for secondary boiler repeatedly Parameter Control standby boiler variably to the target value YES If the secondary boiler has no independent control, the main control takes over the control of the boiler setpoints of the secondary boiler. Which sensor is used for the standby boiler Which output is used for unloading follow-up boiler 0.5 Bus address of the sensor used. 1.2 See "Setting the module address" [page 63] Observe the information on hydraulic systems in the "S-Tronic Plus energy systems" documents. Invert standby boiler isolating valve Which second Boiler is installed? NO Oil boiler For DHW tank loading through the secondary boiler, the switch valve is activated with 230V. If the valve switches incorrectly, this parameter can be adjusted. Boiler type of the secondary boiler: - OIL BOILER - MANUALLY FED - AUT. FED - GAS BOILER Burner relay A 0 38 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Menu overview and parameters Menu - Network pump.7 Menu - Network pump.7.1 Status display of the network pump Parameters Network return temperature 0 C Display of the current values for the relevant parameter Position of the Network pump speed 60% sensors and pumps depending on the system used: Observe the information on multiple house schemes in the "S-Tronic Plus Return temperature feeder 1 0 C energy systems" documents. Speed, feeder 1 0% Return temperature feeder 2 0 C Speed, feeder pump 2 0%.7.2 Network pump temperature settings Network return setpoint Parameters Return temperature setpoint feeder 1 Return temperature setpoint feeder 2 50 C Setting for the desired network temperature setpoints. Position of the sensors depending on the system used: 50 C 50 C Observe the information on multiple house schemes in the "S-Tronic Plus energy systems" documents. Operating Instructions S-Tronic Plus B070210_en 39

Menu overview and parameters Menu - Network pump.7.3 Service parameters for the network pump Parameters Only switch on the network pump when required by the store (variant 3 / ) NO YES: The network pump switches on, if there is a requirement from a storage tank. NO: The network pump switches on, if there is a requirement from a storage tank, a DHW tank or a heating circuit. With variant 3 only storage tanks 2, 3 and are considered. Minimum speed for network pump Which sensor is used for the network return temperature Which pump is used for the network pump Minimum speed for feeder pump 1 Which sensor is used for feeder 1 Which pump is used for feeder 1 Minimum speed for feeder pump 2 Which sensor is used for feeder 2 Which pump is used for feeder 2 5% Adjusting the minimum speed to the relevant pump type. NOTICE: Set the pump switch to the highest power level (only when the pump is disconnected from the power supply). 0.6 Bus addresses of the sensors used, depending on the system 0.2 See "Setting the module address" [page 63] Observe the information on hydraulic systems in the "S-Tronic Plus energy systems" documents. 5% Adjusting the minimum speed to the relevant pump type. NOTICE: Set the pump switch to the highest power level (only when the pump is disconnected from the power supply). 1.6 Bus addresses of the sensors used, depending on the system 1.1 See "Setting the module address" [page 63] Observe the information on hydraulic systems in the "S-Tronic Plus energy systems" documents. 5% Adjusting the minimum speed to the relevant pump type. NOTICE: Set the pump switch to the highest power level (only when the pump is disconnected from the power supply). 2.6 Bus addresses of the sensors used, depending on the system 2.1 See "Setting the module address" [page 63] Observe the information on hydraulic systems in the "S-Tronic Plus energy systems" documents. 0 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Menu overview and parameters Menu - Difference regulator.8 Menu - Difference regulator.8.1 Status displays for the difference regulator Parameter Heat source sensor 70 C Current temperature of the heat source (heat distributor, e.g. storage tank) Heat sink sensor 60 C Current temperature of the heat sink (user, e.g. DHW tank) Pump speed 5% Current pump speed.8.2 Temperature settings for the difference regulator Parameter Startup difference 10 C If the temperature of the heat source is higher than the heat sink by the specified difference, the pump activates Shutdown difference 5 C If the temperature difference between the heat source and the heat sink falls below this value, the pump is deactivated. Minimum temperature for heat source Maximum temperature for heat sink 10 C Temperature settings for regulating range of the differential temperature regulating output. 100 C The standard settings of 10 C or 100 C are selected so that the values in normal operation stay outside a limit..8.3 Service parameters for the difference regulator repeatedly Parameter Minimum pump speed Which sensor is used for the heat source 5% Adjusting the minimum speed to the relevant pump type. 7.5 Bus addresses of the sensors used, depending on the system See "Setting the module address" [page 63] Observe the information on hydraulic systems in the "S-Tronic Plus energy systems" documents. Operating Instructions S-Tronic Plus B070210_en 1

Menu overview and parameters Menu - Difference regulator Which sensor is used for the heat sink Which pump is used Parameter 7.6 7.2 2 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Menu overview and parameters Menu - Circulation pump.9 Menu - Circulation pump.9.1 Status display for the circulation pump Parameters Return temperature in secondary circulation line Flow switch on the domestic hot water line Speed of the circulation pump 5 C Shows the current temperature at the return sensor of the circulation line. If the parameter "Return sensor present" is set to "NO", 0 C is permanently displayed. 1 Shows the current status of the flow sensor. 0... No flow at the valve 1... Valve registers flow 60% Current circulation pump speed.9.2 Temperature settings for the circulation pump Parameter Return sensor present YES YES: The circulation pump is controlled according to the time program and temperature at the sensor. In conjunction with the use of a flow valve, the circulation pump is also activated at a signal from the flow valve. NO: The circulation pump is controlled according to a time program. In conjunction with the use of a flow valve, the circulation pump is also activated at a signal from the flow valve. Connect the flow sensor as the return sensor. Switch off the pump at what return temperature in the circulation line 50 C Parameter only relevant when a return sensor is used! If the set temperature is reached, the circulation pump shuts down. Circulation pump run-on 300s Parameter only when a flow valve is used! If the flow valve does not register any more flow, the circulation pump carries on running for the time set. Operating Instructions S-Tronic Plus B070210_en 3

Menu overview and parameters Menu - Circulation pump.9.3 Time settings for the circulation pump repeatedly See "Setting times" [page 18].9. Service parameters of the circulation pump repeatedly Parameters Which sensor is used for the circulation return Which sensor input is used for the flow switch Which pump is used for the circulation 0.6 Bus addresses of the sensors and pumps used, depending on the system 1.5 3.1 See "Setting the module address" [page 63] Observe the information on hydraulic systems in the "S-Tronic Plus energy systems" documents. Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Menu overview and parameters Menu - Manual.10 Menu - Manual.10.1 Digital outputs Parameter Heating circuit pump 0 Standby relay A 0 A 0 Used to test the digital outputs and is intended only for service technicians. The parameters displayed vary depending on the configuration A Automatic -A 0... Automatic, OFF -A 1 Automatic, ON.10.2 Analogue outputs 0 MANUAL, OFF 1 MANUAL, ON ID Fan Parameter Actual value: 0% A 0% Pump 1 on core module A 0% Pump 1 at hydraulic module address 0 Pump 2 at hydraulic module address 0 Pump 1 at hydraulic module address 7 Pump 2 at hydraulic module address 7 : : A 0% A 0% A 0% A 0% Used to test the analogue outputs and is intended only for service technicians. The parameters displayed vary depending on the configuration A Automatic -A 0%... Automatic, OFF -A 1%-100%... Automatic, with % value ON 0%... Manual, OFF 1%-100%... Manual, with corresponding % value ON Operating Instructions S-Tronic Plus B070210_en 5

Menu overview and parameters Menu - Manual.10.3 Digital inputs repeatedly Parameter Door switch Hi-limit stat input E-stop input Boiler enable A 0 A 0 A 0 A 0 Used to test the digital inputs and intended only for service technicians. The parameters displayed vary depending on the configuration. A Automatic -A 0 Automatic, OFF -A 1 Automatic, ON 0... Manual, OFF 1... Manual, ON 6 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Menu overview and parameters Menu - System.11 Menu - System.11.1 Settings Setting parameters Boiler temperature Parameter Boiler temperature setpoint 80 C The boiler temperature is regulated to this temperature Shutdown if current boiler temperature is higher than boiler setpoint + Always switch off at maximum boiler setpoint + Minimum boiler temperature to release all pumps 5 C If the boiler temperature exceeds the setpoint by this parameter value, the boiler switches to slumber status. 3 C If the maximum boiler temperature setpoint is exceeded by this parameter the boiler carries out the shutdown procedure. The heating circuit and storage tank loading pumps will also begin to run to cool the boiler. The boiler starts up again below the temperature setpoint. 65 C The pumps are released from this boiler temperature. (Hysteresis 2 C) Minimum return temperature 60 C The return temperature control is released below this return temperature. Adjustable parameters Flue gas Parameter Maximum heating up time, during which HEATING status must be reached 10m After this time has elapsed, after the start of heating, the minimum difference between flue gas and boiler temperature has not been reached, the controller switches to "Off". Minimum flue gas temperature 150 C Min. setpoint for the flue gas temperature. Lowest load point for continuous operation Maximum flue gas temperature 250 C Max. setpoint for the flue gas temperature. Highest load point for sufficiently good degree of efficiency. Start increase of flue gas temperature Minimum difference between flue gas temperature and boiler temperature during heating 20 C Value, by which the flue gas temperature setpoint is increased when heating up. 15 C Condition for "Heating" status Operating Instructions S-Tronic Plus B070210_en 7

Menu overview and parameters Menu - System Parameter Flue gas temperature, below which boiler switches to SHUTDOWN status Desired work point of flue gas temperature 80 C If the flue gas temperature is below this value for the duration of the maximum heating up time, the controller goes to "Off" status. 200 C Adjustable parameters Air settings repeatedly Parameter Minimum ID fan speed 35% Adjusting the minimum speed of the fan used ID fan min 16% Base point for setting the ID fan characteristic line ID fan max 96% End point for setting the ID fan characteristic line General settings repeatedly Parameter Modem installed NO If the boiler has a modem for data transfer, this value must be set to "YES". Memory cycle of data logger 5s Leave the value! This is the memory cycle used for saving data onto the data logger. Output warnings through fault message relays COM 2 is used as a MODBUS interface NO NO If this parameter is set to "YES", warnings from the boiler system are also displayed on the fault message relay. YES: The COM 2 interface can be used for connection with a MODBUS (RTU / ASCII) NO: The COM 2 interface sends the most important boiler values every second MODBUS address 2 Adjustable parameter for MODBUS MODBUS Protocol (1 RTU / 2 ASCII) 1 8 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Menu overview and parameters Menu - System.11.2 Current values.11.3 Error list repeatedly See "Error display" [page 5].11. Parameters for sensors and pumps repeatedly Which sensor is used for storage tank top Parameters Which sensor is used for bottom storage tank Which pump is used for the storage tank Which sensor is used for standby boiler Which output is used for unloading follow-up boiler Which sensor is used for the storage tank reference Which pump is used for the solar collector Which pump is used for the solar isolating valve Which sensor is used for top DHW tank 1 Which sensor is used for solar reference DHW tank 1 0.1 Setting the bus addresses of the sensors and pumps used 0.2 0.1 0.5 Pump 1 0.2 1.1 1.2 0.3 0. See "Setting the module address" [page 63] The display of the parameters varies depending on the system set. Observe the information on hydraulic systems in the "S-Tronic Plus energy systems" documents. Operating Instructions S-Tronic Plus B070210_en 9

Menu overview and parameters Menu - System Parameters Which sensor is used for bottom DHW tank 1 Which pump is used for DHW tank 1 0.3 0.2.11.5 Display operating rights repeatedly Parameter Control adress 1... 7 HEATING SYSTEM: Allow access to heating circuit 01? Allow access to heating circuit 18? DHW TANK SYSTEM: Allow access to DHW tank 01? Allow access to DHW tank 08? STORAGE TANK SYSTEM: Allow access to storage tank 01? Allow access to storage tank 0? SOLAR SYSTEM: Allow access to solar 01? : : : YES YES YES YES YES YES YES To the individual controls (address 1-7) that allocate access rights to change heating circuit parameters. CAUTION! The parameters are set to "YES" at the factory, therefore every control has access to all parameters by default! To the individual controls (address 1-7) that allocate access rights to change DHW tank parameters. CAUTION! The parameters are set to "YES" at the factory, therefore every control has access to all parameters by default! To the individual controls (address 1-7) that allocate access rights to change storage tank parameters. CAUTION! The parameters are set to "YES" at the factory, therefore every control has access to all parameters by default! To the individual controls (address 1-7) that allocate access rights to change solar parameters. CAUTION! The parameters are set to "YES" at the factory, therefore every control has access to all parameters by default! NOTICE! The operating rights of the room consoles should be allocated from the boiler control panel, as unrestricted access is only possible here. 50 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Menu overview and parameters Menu - System.11.6 Display allocations repeatedly Parameter HEATING SYSTEM: Display with address 1 is allocated to the following heating circuit: Display with address 7 is allocated to the following heating circuit: DHW TANK SYSTEM: Display with address 1 is allocated to the following DHW tank: Display with address 7 is allocated to the following DHW tank: : : none none none none Allocates the relevant control (address 1-7) to a particular heating circuit. CAUTION! The parameters are set to "none" at the factory, so the heating circuit functions (room sensors, party mode, setback mode,...) are not possible on this control by default! Allocates the relevant control (address 1-7) to a particular DHW tank. CAUTION! The parameters are set to "none" at the factory, so the hot water functions (function key) are not possible on this control by default!.11.7 Basic display parameters repeatedly Parameters The display of the two positions in the basic display can be adjusted individually, and for each position you can choose from the following parameters: Boiler, flue gas, external, room, DHW tank, storage tank top, storage tank bottom, storage tank graphic, collector T., flue gas, domestic hot water, residual O 2, O 2 contr., feed rate, ID fan Instead of the separated definition of pos. 1 and pos. 2, the storage tank graphic can be selected. In addition to the storage tank graphic, the storage tank top, middle (if present) and bottom temperatures are displayed. OT... Outside temperature BT... Boiler temperature RT Room temperature (on RBG 3200 BT is replaced by RT) DT... DHW tank temperature Operating Instructions S-Tronic Plus B070210_en 51

Menu overview and parameters Menu - System.11.8 Changing languages repeatedly.11.9 Changing the date repeatedly.11.10 Changing the time repeatedly.11.11 Standard settings repeatedly.11.12 Current user level Adopting standard factory settings. This resets all parameters! After resetting the parameters for the boiler must be reset or else boiler functioning is no longer guaranteed. (only with service code) See "Changing the operating level" [page 13] 52 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Menu overview and parameters Menu - System.11.13 System type repeatedly See "Setting the system type" [page 53] Operating Instructions S-Tronic Plus B070210_en 53

5 Troubleshooting Procedure for fault messages 5 Troubleshooting The term "fault" is a collective term for warnings, errors and alarms. The boiler reacts differently to the three types of message: WARNING ERROR ALARM In case of warnings the status LED flashes orange and the boiler initially continues controlled operation. In case of errors, the status LED flashes with a red light, the boiler follows shutdown procedure and remains in operating status, "Off ", until the error is resolved. After troubleshooting, the boiler switches back to the operating status, "Off". An alarm triggers a system emergency stop. The status LED flashes with a red light, the boiler switches off immediately and the heating circuit controller and pumps remain active. 5.1 Procedure for fault messages When a fault occurs: The status LED flashes with a red or orange light The display shows all the current fault messages and the warning symbol in the status line 5 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Troubleshooting Procedure for fault messages 5 After pressing the enter key the fault is acknowledged. The warning symbol in the status line shows that the fault is still pending. Pressing the info key displays the fault as info text with the related fault number. The warning symbol only switches off when the fault has been resolved! After pressing the enter key an info text on the cause of the fault is displayed. Pressing the enter key again displays instructions for resolving the fault. If a fault has various causes or the cause can be resolved in various ways, you can scroll through with the navigation keys. Operating Instructions S-Tronic Plus B070210_en 55

6 Electrical connection and wiring Core module 6 Electrical connection and wiring 6.1 Core module Optional module Bus Pellet module or Wood chip module Display COM2 COM1 Service interface CAN L CAN H +U BUS Enhancement Central processor slot 2 AT Core module C NO L N L1 N L N L N OPEN N CLOSED Heating circuit pump 0 / burner relays Heating circuit pump 1 Heating circuit pump 2 Mixer 1 OPEN N CLOSED Mixer 2 6,3 AT L N Mains L N Pump 1 STL Emergency off Green-yellow red + blue - L N Sig +5V ID Fan Flue gas sensor Boiler door Sensor 2 Sensor 1 External sensor Room sensor 2 Room sensor 1 Flow sensor 2 Flow sensor 1 Return feed sensor Boiler temperature sensor 6.1.1 Connection instructions Connection Bus Display COM 1 Cable dimensions / Specifications / Notice Connection with cable LIYCY paired 2x2x0.5; See "Connecting the Bus Cable" [page 62] Caution! CAN L and CAN H must not be connected with +U BUS. Patch cable CAT 5 RJ5 SFTP 1:1 allocation Null modem cable 9-pin SUB-D Lock Connection cable 1) 2 x 0.75mm 2 56 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Electrical connection and wiring Core module 6 EMERGENCY STOP Connection cable 1) 2 x 0.75mm 2 Caution! Do not connect the emergency off/ emergency stop switch to the 230V power supply cable of the boiler. The switch must be a N/C switch and it must be linked to the 2V safety chain of the STL at this terminal. Boiler release Connection cable 1) 2 x 0.75mm 2 Caution! The connection must be a floating connection. External sensor Room sensor 1/2 Flow sensor 1/2 Pump 1 on core module Mains Connection cable 1) 2 x 0.75 mm 2, from 25m cable length shielded Connection cable 1) 2 x 0.75 mm 2, from 25m cable length shielded Connection cable 1) 2 x 0.75 mm 2, from 25m cable length shielded Connection cable 1) 3 x 1.5 mm 2, max. 1.5A / 280W / 230V Caution! Do not use an EC motor. Connection cable 1) 3 x 1,5 mm 2 ; fused with max. 16A (provided by the customer) Mixer 1/2 Connection cable 1) x0.75mm 2, max. 0.15A / 230V) Heating circuit pump 1/2 Heating circuit pump 0 Connection cable 1) 3 x 1.5 mm 2, max. 2.5A / 500W Connection cable 1) 3 x 1.5 mm 2, max. 3A / 600VA 6.1.2 Mains connection 1)YMM as per ÖVE-K1-5 or H05VV-F as per DIN VDE 0881-5 Connect the power supply at the "Mains connection" (1) plug Flexible sheathed cable must be used for the wiring; this must be of the correct size to comply with applicable regional standards and regulations. The power supply line (mains connection) must be fitted with a 16A fuse by the customer. If a safety overload switch is used it should be a type with 16A. 1 6.1.3 Connecting the flue gas sensor green-yellow red + blue - Core module Operating Instructions S-Tronic Plus B070210_en 57

6 Electrical connection and wiring Core module 6.1. Combination with oil burner The connection, "Heating circuit pump 0", can be used for heating circuit pump 0 or as burner relays depending on the system setting. Connecting a HCP 0 up to 2 Ampere: L1 Core module N HCP 0 Connecting a HCP 0 up to 5 Ampere: L1 Core module N HCP 0 L PE N Connection as burner relays: Core module L1 N To oil boiler control: floating contact for burner release 6.1.5 Connecting the remote control A room sensor is included in the remote control, which sends the current room temperature to the control. Switch settings: Switched off Automatic mode Setback mode Override circuit Heating circuit deactivated, only frost protection! Heating phases according to setback program Ignores the heating phases Ignores the setback Handwheel Allows you to adjust the temperature by +/- 3 C 58 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Electrical connection and wiring Core module 6 NOTICE! See assembly instructions / Functional description room sensor FRA Operating Instructions S-Tronic Plus B070210_en 59

6 Electrical connection and wiring Expansion modules 6.2 Expansion modules 6.2.1 Heating circuit module Two heating circuits can be controlled as standard with the core module. To extend the heating circuit control, the heating circuit module boards must be expanded. It is possible to expand by eight heating circuit modules (addresses 0 to 7), and the correct setting of the module address must be observed. See "Setting the module address" [page 63] Heating circuit module (FRHEM 16) Bus Module Address Bus Flow sensor 1 Flow sensor 2 Room sensor 1 Room sensor 2 Sensor 1 Mains Heating circuit pump 1 Heating circuit pump 2 Mixer 1 Mixer 2 Connection instructions Connection Bus Cable dimensions / Specifications / Notice Connection with cable LIYCY paired 2x2x0.5; See "Connecting the Bus Cable" [page 62] Caution! CAN L and CAN H must not be connected with +U BUS. Flow sensor 1/2 Connection cable 1) 2 x 0.75mm 2 Room sensor 1/2 Mains Heating circuit pump 1/2 Mixer 1/2 Connection cable 1) 2 x 0.75 mm 2, from 25m cable length shielded Connection cable 1) 3 x 1.5mm 2, fuse 10A Connection cable 1) 3 x 1.5 mm 2, max. 2.5A / 230V / 500W Connection cable 1) x 0.75mm 2, max. 0.15A / 230V 1)YMM as per ÖVE-K1-5 or H05VV-F as per DIN VDE 0881-5 60 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Electrical connection and wiring Expansion modules 6 6.2.2 Hydraulic module The hydraulic module makes the connections of sensors and pumps available for the hydraulic components of the system (storage tank, DHW tank...). Expansion can include up to eight hydraulic modules (address 0 to 7) You should ensure that the module address is given correctly. See "Setting the module address" [page 63] Hydraulic module (FRHYU 1) Bus Temp. sensor 1 Temp. sensor 2 Temp. sensor 3 Temp. sensor Temp. sensor 5 Temp. sensor 6 Mains Pump 1 Pump 2 Bus 2x Bus Module Address Connection instructions Connection Cable dimensions / Specifications / Notice 2 x Bus Patch cable CAT 5 RJ5 SFTP 1:1 allocation Bus Sensors 1-6 Mains Pump 1/2 Connection with cable - LIYCY paired 2x2x0.5; See "Connecting the Bus Cable" [page 62] Notice! CAN L and CAN H must not be connected with +UBUS. Connection cable 1) 2 x 0.75 mm 2, from 25m cable length shielded Connection cable 1) 3 x 1.5mm 2, fuse 10A Connection cable 1) 3 x 1.5mm 2, max. 1.5A / 230V / 280W Caution! Do not use an EC motor. 1)YMM as per ÖVE-K1-5 or H05VV-F as per DIN VDE 0881-5 Operating Instructions S-Tronic Plus B070210_en 61

6 Electrical connection and wiring Expansion modules 6.2.3 Return mixer module The return mixer module provides the connection for a return mixer. The relevant sensor is the return sensor on the core module. Connection instructions Connection Cable dimensions / Specifications / Notice Bus Connection with enclosed patch cable 0.5m 2 x mains Connection cable 1) 3 x 1.5mm 2, Return mixer Connection cable 1) x 0.75mm 2, max. 0.15A / 230V 1)YMM as per ÖVE-K1-5 or H05VV-F as per DIN VDE 0881-5 Connection diagram Disconnect already existing mains cable at core module and connect it at return mixer module Return mixer Use deliverd mains cable for connection with core module Main switch Return mixer module (FRRLA10) Core module Return sensor Plug Mains Connect return mixer module and core module with bus cable 6.2. Connecting the bus cable For the bus connections between the individual modules cable type LIYCY paired 2x2x0.5 should be used. The connection to the 5-pin plugs should be carried out according to the following diagram: 62 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

CAN L +U BUS CAN H 2 AT 6,3 AT C NO L N L1 N L N L N AUF N ZU AUF N ZU L N L N N L Sig +5V Modul-Adresse Modul-Adresse Electrical connection and wiring Expansion modules 6 Braided shield White Green Yellow Brown CAN L CAN H +U BUS CAN L CAN H +U BUS Braided shield White Green Yellow Brown 6.2.5 Setting end jumpers To ensure smooth running of the bus system, both jumpers (J) must be set on the last module. The jumpers are placed at the hydraulic system module Core module in standard delivery. They should be removed in case of an expansion. 6.2.6 Setting the module address For hydraulic modules or heating circuit modules it is necessary to set the necessary order with the module addresses. The first board of a module type should always have the address 0, so that the standard hydraulic systems set do not have to be subsequently configured. For further module types rising module addresses (address 1-7) are set. Example - heating system with 1 storage tank, 1 DHW tank and 6 heating circuits: Core module Heating circuit modulel with address 0 Heating circuit module with address 1 Kernmodul Erweiterung Hauptprozessor-Steckplatz HEIZKREISMODUL HEIZKREISMODUL IN +2V grün-gelb rot + blau - Heating circuit 1/2 Storage tank (Temp. sensor 1/2) DHW tank (Return sensor) Heating circuit 3/ Heating circuit 5/6 Standard delivery Expansion modules... Module address set Heating circuit module Hydraulic module Heating circuit Sensor Pump 0 03 0 0.1 0.6 0.1 0.2 1 05 06 1.1 1.6 1.1 1.2 2 07 08 2.1 2.6 2.1 2.2 3 09 10 3.1 3.6 3.1 3.2 11 12.1.6.1.2 5 13 1 5.1 5.6 5.1 5.2 6 15 16 6.1 6.6 6.1 6.2 7 17-18 7.1 7.6 7.1 7.2 Operating Instructions S-Tronic Plus B070210_en 63

7 Setting protocol 7 Setting protocol The following tables record which heating components are allocated to the connections. Below the heating circuit number it notes the heating area, for which this heating circuit is used. The relevant connected unit should be noted next to the pumps or sensors. Example: Module address = 2; First heating circuit: 07 Workshop radiator Pump 2.1 Sensor 2.1 Collector pump Collector sensor Core module CAN L CAN H +U BUS Erweiterung Hauptprozessor-Steckplatz 2 AT Core module C NO L N L1 N L N L N AUF N ZU First heating circuit: 01 Connection heating circuit pump 0 as burner relays Heating circuit pump 0 AUF ZU AUF P2 5V ZU AUF P2 5V sw + gr - ws 13VDC ws 13VDC IN +2V grün-gelb rot + blau - 6,3 AT N ZU L N L N L N Sig +5V Second heating circuit: 02 Pump 1 used as return feed lift pump Pump 1 output as switch valve (boiler1 - boiler 2) Pump 1 as Set module address: 0 Heating circuit module Hydraulic module First heating circuit: 03 Pump 0.1 Pump 0.2 Hydraulic module Sensor 0.1 Sensor 0.2 Heating circuit module Second heating circuit: 0 Sensor 0.3 Sensor 0. Sensor 0.5 Sensor 0.6 6 Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com

Setting protocol 7 Set modue address: 1 Heating circuit module First heating circuit: 05 Hydraulic module Pump 1.1 Pump 1.2 Hydraulic module Sensor 1.1 Sensor 1.2 Heating circuit module Second heating circuit: 06 Sensor 1.3 Sensor 1. Sensor 1.5 Sensor 1.6 Set module address: 2 Heating circuit module First heating circuit: 07 Hydraulic module Pump 2.1 Pump 2.2 Hydraulic module Sensor 2.1 Sensor 2.2 Heating circuit module Second heating circuit: 08 Sensor 2.3 Sensor 2. Sensor 2.5 Sensor 2.6 Final check Bus cable correctly connected (see Connecting the bus cable )) Addressing correctly carried out and recorded Jumper placed at the last module Operating Instructions S-Tronic Plus B070210_en 65

Menu structure - S-Tronic Plus Basic display Basic display System Heating Heating circ. 01.. 18 State Temperatures Times Service Actual flow temperature Flow temperature setpoint Flow temperature SP at external temperature of +10 C Flow temperature SP at external temperature of -10 C Reduction of flow temperature in setback mode External temperature, at which heating circuit pump switches off in heating External temperature, at which heating circuit pump switches off in setback mode Frost protection temperature Current program Change program Standard program MO, TU,..., SU MO - FR SA - SU SAME ALL DAYS DHW tank top temperature Water DHW tank 01... 08 State Temperatures Set DHW temperature Times Reload, if DHW temperature is below Service Solar State Temperatures Service DHW tank target temperature during solar charging Temp. differential to start collector pump Temp. differential to stop collector pump Maximum storage tank bottom temperature during solar charging Storage tank Storage tank 01... 0 State Temperatures Service Heating circ. release from follow. storage tank temp. Storage tank is fully loaded, if temperature diffenrence between boiler and bottom Top storage tank temp. when the start-up relief valve switches to bottom store Boiler Boiler 2 Network pump State Temperatures Service State Temperatures Service Boiler temperature setpoint DRA controller State Cirk. pump Times Digital Outputs Boiler temperature Manual Analog Outputs Flue gas Digital Inputs Air settings System Lambda values Set General settings Current values Error Error display Sensors and pumps Error history Basic disp. param. Clear error history Disp. operat. rights Display allocations Language Current Date Current Time Standard settings User level System selection Boiler type System selection Customer... Installer... Service... Controls DHW tank system Heating system Solar panel system The parameters actually displayed can be varied depending on system configuration and operating level. Fröling GmbH 710 Grieskirchen, Industriestraße 12 www.froeling.com