eta PelletsUnit Service Manual

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This document helps support you with the cleaning and maintenance of the boiler. The required steps are listed in detail here. Take note of the date of the cleaning or maintenance and any faults that may have occurred. This facilitates troubleshooting for the expert (system operator, heating technician...). For services (such as commissioning, mainte- nance, fault fixing provided by ETA customer service), the service reports are provided in digital form. For clarity, you should staple these reports to this document or enclose them. Commissioning data Enter the boiler number (printed on the type plate), the date of commissioning as well as the heating technician who commissioned the system. Copyright All contents of this document are property of ETA Heiztechnik GmbH and are protected by copyright. Any reproduction, transfer to third parties or use for other purposes is prohibited without written permission from the owner. Subject to technical changes We reserve the right to make technical modifications without notice. Printing and typesetting errors or changes of any kind made in the interim are not cause for claims. Individual configurations depicted or described here are only available optionally. In the event of contradictions between individual documents regarding delivery scope, the information in our current price list applies. Explanation of symbols Instructions and information Layout of safety instructions SIGNAL WORD! Type and source of danger Possible effects • Measures for avoiding the danger Types of safety instruction CAUTION! On non-compliance with this safety instruction, there is a risk of material damage. WARNING! On non-compliance with this safety instruction, there is a risk of physical injury. DANGER! On non-compliance with this safety instruction, there is a risk of major physical injury. Commissioning data Boiler number: ________________________________________ Commissioned on: _________________________________________ Commissioned by (company): _________________________________________ _________________________________________ _________________________________________

2 Cleaning and maintenance 2.1 Maintenance notes Performing regular cleaning and maintenance To ensure satisfactory functioning, cleaning and maintenance must be performed at regular intervals. Carry out this work within the intervals stated here. All tasks where the maintenance table reads "Customer" or "Customer or expert" in the column "To be carried out by" can be carried out by any trained adult. Instructions can be provided by the heating technician or our customer service. Steps that are marked with "Expert" only can only be carried out by the heating technician or our customer service. Operation only by trained personnel The product may be operated by trained adults only. Training may be provided by the heating technician or our customer service. Please read the associated doc- umentation carefully in order to avoid errors during operation and maintenance. Persons who lack experience and knowledge as well as children may not operate, clean, or maintain the product. Display maintenance steps on the screen With this boiler, the maintenance steps can also be displayed on the ETAtouch control system screen. The required activities will be explained to you step-by-step and supplemented with detailed graphics. Each maintenance is saved and the details can be viewed at any time. So you can maintain a long-term overview of the maintenance carried out. Of course, the maintenance can also be carried out using the service guide, without the support of the ETAtouch control system. To access maintenance, switch to settings in the boiler function block ( [Settings] button) and then select the function [Maintenance]. Fig. 2-1: Overview (example) You can also access this overview by pressing the maintenance switch. Also when the message appears that maintenance of the boiler is required. In the overview the different maintenance intervals are listed in the upper area. This includes the maintenance already carried out. With the button, information about the selected maintenance is displayed. Maintenance that you can carry out as an end customer is labelled with the symbol. All others are reserved for specialists and require authorisation. Press the button to start the maintenance. The individual steps are displayed on the screen. You can switch to the next or the previous screen respectively with the arrow keys on the left and right side of the screen. Fig. 2-2: Maintenance step (example)

Maintenance notes 5 Follow the on-screen instructions and carry out all steps carefully. Enter your name at the end of maintenance ( button) and save the maintenance with the button. Fig. 2-3: End of maintenance To end maintenance prematurely, press the right arrow key several times until you get to the end. There you can end the maintenance with the button. Cancellation during a maintenance step is not possible. Explanation of the maintenance switch The maintenance switch on the boiler is needed for performing maintenance with the aid of the [Main- tenance] function in the ETAtouch control system. This displays the individual maintenance steps on the boiler screen. With this variant the heating mode is stopped, but the boiler remains on at the mains switch. So that all drives are disconnected, the safety chain of the boiler is disrupted with the maintenance switch. The screen will display a message when it is time to actuate the maintenance switch. Fig. 2-4: Maintenance switch The maintenance switch is marked with the symbol and has two settings. • "1" = regular operation This is the standard position of the maintenance switch. The boiler can execute heating mode in this position. • "0" = maintenance mode In this position, all drives are disconnected to perform maintenance. The circuit boards, however, are still live. Explanation of pictograms Switch the boiler on/off with the mains switch. Perform a visual check of the components. Clean the components, for example, with a soft cloth. Remove deposits with a vacuum or an ash vacuum. Remove deposits with the poker. Remove deposits with the cleaning brush. Replace the wear parts (e.g. seals) on the components. Lubricate the components. The lubricant to use is listed in the respective step. Install the components with some force (for example the retaining tube or the Lambda probe). Handle the components carefully, since they break very easily. Clean panels If necessary, clean the panels of the boiler and the ETAtouch screen with a moist cloth. Under no circumstances use aggressive solvents, chemicals or scouring agents. They can lead to stress cracks and damage.

Checking the boiler counters The counters can be seen in the boiler's text menu. Counter [Consump. since maint.] is used for the service intervals. If it has reached one of the listed intervals, maintenance is required. This counter is in: Counters Consump. since maint.

Cleaning and maintenance 2.2 Maintenance openings in the boiler Maintenance openings and components 1 Heat exchanger cover 2 Vacuum turbine for pellet transport 3 Firebed switch 4 Stoker drive chain 5 Water pressure sensor 6 Ignition 7 Position switch for ash box

Maintenance openings in the boiler 9 1 Fill level sensor for pellet hopper 2 Safety valve 3 Flue gas temperature sensor 4 Draught fan 5 De-ashing drive chain 6 Filling and draining valve 7 Underpressure sensor

2.3 Maintenance table Tasks Regularl y Every 3,000 kg pellets or 1 year Every 5000 kg pellets or 3 years to be performed by Empty the ash box • Empty the ash box • Check the seals X X X Customer Check the pressure of the heating system X X X Customer Visual check of the safety valves X X Customer or specialist Chimney • Clean the flue tube • Flush the chimney's condensate drain X X Customer or specialist Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe X X Customer or specialist Clean the draught fan X Specialist Clean the temperature sensor X Specialist Check the combustion chamber and heat exchanger • Check the firebed button and firebed switch • Check heat exchanger tubes • Check the seal on heat exchanger cover • Dismantle the ignition and clean the ignition tube X Specialist Check the pellet hopper • Cleaning the fill level sensor • Clean the strainer X Specialist Check the stoker unit • Checking the stoker drive chain X Specialist Check de-ashing • Check the de-ashing drive chain X Specialist Check the underpressure sensor • Clean the silicon hoses • Calibrate the underpressure sensor X Specialist Check the ash box position switch X Specialist Calibrate the lambda probe X Specialist Reset the maintenance counter X Specialist Perform heating test X Specialist

Regularly 11 2.4 Regularly 2.4.1 Preparation Stop heating End the boiler's heating mode with the On/Off switch in the boiler overview window. The boiler performs an ember burnout and then changes to [Switched off] mode. Press the [De-ash] button to make the boiler perform a final de-ashing. 2.4.2 Empty the ash box Empty the ash box and inspect the seals Open the boiler door and fold the locking lever forwards. Remove the ash box from the boiler. Fig. 2-5: Locking lever Take off the cover of the ash box by loosening the two fasteners and empty the ash box. Fig. 2-6: Lid Check the ash for embers. Never put hot ash into the waste bin! Inspect the seal on the ash box lid for integrity, and replace it if necessary. Fig. 2-7: Seal Inspect the integrity of the ash box seals on the boiler, replace them if necessary. Fig. 2-8: Seals Attaching the ash box to the boiler Reattach the cover of the ash box and secure with the fasteners. Push the ash box over the connection on the boiler and attach it to the boiler with the locking lever. Fig. 2-9: Locking lever

2.4.3 Check pressure of the heating system Checking the heating system water pressure In buildings with up to three storeys, the optimum water pressure in a cold heating system is between 1 and 2 bar. For a warm heating system, the optimum water pressure is between 1.5 and 2.5 bar. Fig. 2-10: Pressure gauge The control system displays a warning on the screen as soon as the boiler pressure drops below 1.2 bar. If the boiler pressure falls below 0.8 bar or rises above 2.8 bar, the control system automatical- ly switches the boiler off. You can adjust the pressure in the heating system on the filling and draining connection of the boiler. Fig. 2-11: Filling and draining connection If the water pressure is too low, fill the cold heating system to approx. 2 bar. Do not fill to a higher pressure, as water expands with increasing temperature and the water pressure also rises when the boiler is in heating mode. The safety valve triggers at approx. 2.8 bar. If the water pressure drops several times a year, contact a heating professional. When refilling water in the heating system, the same water as used during initial filling should be used whenever possible (e.g. prepared water). 2.4.4 Establish operational readiness Switching on the boiler Switch the boiler back on with the On/Off switch.

3,000 kg / annually 13 2.5 3,000 kg / annually 2.5.1 Preparation Stop heating End the boiler's heating mode with the On/Off switch in the boiler overview window. The boiler performs an ember burnout and then changes to [Switched off] mode. Press the [De-ash] button to make the boiler perform a final de-ashing. Switch off boiler via mains switch WARNING!  Switch off the electricity to the boiler via the mains switch. This prevents injuries caused by switching the boiler on inadvertently. WARNING! Burns caused by hot parts Risk of burning on parts located behind the boiler housing, even after shutting the boiler down. Allow the boiler to cool down sufficiently before starting any activities. 2.5.2 Check safety devices Checking the safety valves Perform a visual check of all safety valves of the heating system. The outlets of the safety valves may not drip. Fig. 2-12: Safety valve If the safety valve drips, open it with a quarter turn of the red cap and rinse it out (danger of scalding). If the safety valve still cannot be sealed effectively after being rinsed several times, it must be cleaned or replaced by an installer (heating technician). A manual check of the safety valve is carried out with a 1/4 turn of the red cap. This rinses the safety valve. However it is very likely that the seal will be damaged in the process and thus the outlet will drip. That is why you should only perform this check on weekdays and never on weekends in cold winter, as no heating technician may be available if the seal is defective.

Cleaning and maintenance 2.5.3 Chimney Cleaning the flue tube Sweep the flue tube from the flue outlet to the chimney and remove flue ash from the chimney using a vacuum cleaner. Sweep the ash into the chimney, not into the boiler. Otherwise, ash will collect in the fan housing and can block the draught fan. Fig. 2-13: Flue tube Rinse the chimney's condensate drain Check the chimney's condensate drain to make sure it is free, as ash can block the outlet. To check, rinse the outlet with some water. Fig. 2-14: Condensate drain 2.5.4 Cleaning the combustion chamber Removing the panel on the top Remove the panel on the top of the boiler. Fig. 2-15: Panel Remove heat exchanger cover Remove the insulation over the heat exchanger cover. Fig. 2-16: Insulation

3,000 kg / annually 15 Remove the heat exchanger cover by loosening the two wing nuts. Fig. 2-17: Heat exchanger cover Removing the combustion chamber cover Using the poker, remove the combustion chamber cover from the combustion chamber. Fig. 2-18: Combustion chamber cover Cleaning the inner walls of the combustion chamber Wipe the ash off the inner walls of the combustion chamber and push it onto the grate or into the heat exchanger tubes. Use a vacuum cleaner to remove flue ash from the upper part of the heat exchanger tubes. Fig. 2-19: Cleaning the inner walls Cleaning the ignition tube Check the ignition tube for combustion residues and clean it by vacuuming. Fig. 2-20: Ignition tube

Cleaning and maintenance Checking the movability of the firebed switch Check the mobility of the firebed button in the combustion chamber by repeated lifting. Fig. 2-21: Firebed button Replacing the combustion chamber cover Clean the combustion chamber cover and re-insert it in the combustion chamber. Fig. 2-22: Combustion chamber cover Cleaning the lambda probe Vacuum out the head of the lambda probe using a vacuum cleaner. Do not dismantle the lambda probe. Fig. 2-23: Head of the lambda probe Check heat exchanger tubes Inspect the heat exchanger tubes for tar deposits. Fig. 2-24: Heat exchanger tubes If there are tar deposits in the heat exchanger tubes, contact customer service immediately. Tar deposits can have several causes, for example: • Air leaks through the heat exchanger cover or the lambda probe • insufficient boiler runtime (start-stop operation) • too little heat consumption due to incorrect control system settings • Usage for an individual room temperature control but without buffer storage tank in heating system • an incorrectly calibrated lambda probe • an incorrect differential pressure measurement

3,000 kg / annually 17 Checking the seal on the heat exchanger cover Clean the heat exchanger cover. Inspect the integrity of the seal on the heat exchanger cover and replace if necessary. Fig. 2-25: Heat exchanger cover CAUTION! Avoid operation with damaged seals Never operate the boiler with damaged seals. Otherwise, leak air is sucked in, disturbing the combustion process and causing increased wear.  Always replace seals as soon as they are damaged. Close heat exchanger cover Fit the heat exchanger cover evenly using the two wing nuts. Fig. 2-26: Heat exchanger cover Then replace the insulation. Fig. 2-27: Insulation Mounting the top panel Remount the panel on the top of the boiler again. Fig. 2-28: Panel

Cleaning and maintenance 2.5.5 Establish operational readiness Switch the boiler on via the mains switch and start de-ashing. Establish the boiler's power supply at the mains switch. Press the [De-ash] button to de-ash the boiler. Switch the boiler back on with the On/Off switch.

5,000 kg / 3 years 19 2.6 5,000 kg / 3 years 2.6.1 Preparation Before this maintenance, perform all steps for the preceding maintenance intervals Before this maintenance, all steps for the preceding maintenance intervals must be performed. WARNING! The following activities may only be performed by qualified specialist personnel. If you carry out these activities without the correspond- ing specialist training, and above all without the required experience, safe operation is no longer guaranteed. The resulting defects and consequential damage are excluded from the guarantee and warranty. Equally an incorrect performance of these activities can lead to serious injuries. Stop heating End the boiler's heating mode with the On/Off switch in the boiler overview window. The boiler performs an ember burnout and then changes to [Switched off] mode. Press the [De-ash] button to make the boiler perform a final de-ashing. Switch off boiler via mains switch WARNING!  Switch off the electricity to the boiler via the mains switch. This prevents injuries caused by switching the boiler on inadvertently. WARNING! Burns caused by hot parts Risk of burning on parts located behind the boiler housing, even after shutting the boiler down. Allow the boiler to cool down sufficiently before starting any activities. 2.6.2 Removing panels Removing the panel on the top Remove the panel on the top of the boiler. Fig. 2-29: Panel Removing the side panel Remove the protective screen for the boiler's supply air. Fig. 2-30: Protective screen

Cleaning and maintenance Remove the side panel. Fig. 2-31: Side panel Removing the panel from the front Unscrew the screws on the panel, lift and remove it. Fig. 2-32: Panel 2.6.3 Clean draught fan Cleaning the draught fan Take the draught fan off the boiler by loosening the screws. Fig. 2-33: Draught fan Remove the ash from the fan housing on the boiler. Fig. 2-34: Clean the fan housing

5,000 kg / 3 years 21 Carefully clean the impeller of the draught fan with a soft brush (not a wire brush) or with compressed air, so that the impeller does not move out of balance. Replace the seal on the draught fan. Fig. 2-35: Clean impeller; replace seal Lubricate the screws with heat-resistant lubricant and reattach the draught fan to the fan housing. Tighten the screws evenly. 2.6.4 Clean temperature sensor Cleaning the flue gas temperature sensor To clean, loosen the screw and pull out the flue gas temperature sensor. Clean the sensor with a soft cloth and then re-install it. When fixing the temperature sensor in place, only tighten the screw hand-tight so as not to damage the sensor. Fig. 2-36: Flue gas temperature sensor

Cleaning and maintenance 2.6.5 Check the combustion chamber and heat exchanger Remove heat exchanger cover Remove the insulation over the heat exchanger cover. Fig. 2-37: Insulation Remove the heat exchanger cover by loosening the two wing nuts. Fig. 2-38: Heat exchanger cover Removing the combustion chamber cover Using the poker, remove the combustion chamber cover from the combustion chamber. Fig. 2-39: Combustion chamber cover Checking the firebed button and firebed switch Check the mobility of the firebed button in the combustion chamber by repeated lifting. Fig. 2-40: Firebed button The firebed switch must be actuated when lifting. Fig. 2-41: Firebed switch Replacing the combustion chamber cover Clean the combustion chamber cover and re-insert it in the combustion chamber. Fig. 2-42: Combustion chamber cover

5,000 kg / 3 years 23 Check heat exchanger tubes Inspect the heat exchanger tubes for tar deposits. Fig. 2-43: Heat exchanger tubes If there are tar deposits in the heat exchanger tubes, contact customer service immediately. Tar deposits can have several causes, for example: • Air leaks through the heat exchanger cover or the lambda probe • insufficient boiler runtime (start-stop operation) • too little heat consumption due to incorrect control system settings • Usage for an individual room temperature control but without buffer storage tank in heating system • an incorrectly calibrated lambda probe • an incorrect differential pressure measurement Checking the seal on the heat exchanger cover Clean the heat exchanger cover. Inspect the integrity of the seal on the heat exchanger cover and replace if necessary. Fig. 2-44: Heat exchanger cover CAUTION! Avoid operation with damaged seals Never operate the boiler with damaged seals. Otherwise, leak air is sucked in, disturbing the combustion process and causing increased wear.  Always replace seals as soon as they are damaged. Close heat exchanger cover Fit the heat exchanger cover evenly using the two wing nuts. Fig. 2-45: Heat exchanger cover

Cleaning and maintenance Then replace the insulation. Fig. 2-46: Insulation Dismantling the ignition and cleaning the ignition tube Carefully remove the ignition by loosening the screws. Make sure that the springs supplied do not get lost. Fig. 2-47: Springs The ceramic igniter is very fragile. Make sure that it is not damaged. Fig. 2-48: Ceramic igniter Take the ignition tube out of the bracket on the boiler. Fig. 2-49: Ignition tube Check the ignition tube for deposits and remove it, for example with a screwdriver. Fig. 2-50: Cleaning the ignition tube Push the ignition tube back into the bracket and attach the ignition with the bracket and the screws.

5,000 kg / 3 years 25 Only hand tighten the screws so that the ignition is kept away from the springs. Do not overtighten the screws, otherwise the ignition may be damaged. Fig. 2-51: Only hand tighten the screws 2.6.6 Check pellet hopper Removing the panel above the pellet hopper housing Remove the panel above the boiler's pellet hopper. Fig. 2-52: Panel Cleaning the fill level sensor Detach the mounting panel of the fill level sensor by loosening the round-headed screws. Fig. 2-53: Mounting the panel for the fill level sensor Mark the correct installation position of the mounting panel for the fill level sensor - with a pen, for example. Inspect the seal on the underside of the mounting panel, and replace if necessary. Clean the fill level sensor with a soft cloth. Fig. 2-54: Checking the seal, cleaning the fill level sensor

Cleaning and maintenance Cleaning the strainer in the pellet hopper Clean the strainer in the pellet hopper by tapping and vacuuming. Fig. 2-55: Strainer Reinstalling the fill level sensor Re-attach the mounting panel and fill level sensor to the pellet hopper. Make sure the installation position is correct. Fig. 2-56: Mounting the panel for the fill level sensor Mount the panel over the pellet hopper. Mount the panel over the boiler's pellet hopper again. Fig. 2-57: Panel 2.6.7 Check stoker unit Checking the stoker drive chain Check the chain tension. The chain may sag by 2-3 cm without any force applied. Tension the chain by shifting the motor. Lubricate the drive chain with chain spray. Fig. 2-58: Stoker drive chain

5,000 kg / 3 years 27 2.6.8 Check de-ashing Checking the de-ashing drive chain Check the chain tension. The chain may sag by 1 cm without any force applied. Tension the chain by shifting the motor. Lubricate the drive chain with chain spray. Fig. 2-59: De-ashing the drive chain 2.6.9 Check underpressure sensor Cleaning the silicon hoses for the underpressure sensor The underpressure sensor is situated on the right- hand side of the boiler above the supply air hole. Fig. 2-60: Underpressure sensor Take the silicon hoses off the underpressure sensor and clean them by carefully blowing out or vacuuming out with a vacuum. Fig. 2-61: Silicon hoses

Cleaning and maintenance Calibrate the underpressure sensor With the boiler switched off and silicone hose removed, the control system must display a measured value of 0 Pa. This measured value can be seen with the [Service] authorisation in the text menu under: If a different value is shown, a calibration using the [Offset] parameter must be carried out. For this parameter, enter the difference from the target value of 0 Pa. Example: Measuring orifice = 2 Pa => Offset = -2 Reconnecting the silicon hoses Reconnect the silicon hoses to the vacuum actuator. Ensure the correct position when connecting. The silicon hoses may not be kinked. 2.6.10 Check ash box position switch Checking the ash box position switch Inspect the function of the ash box position switch. It must be actuated when the ash box is fitted. Fig. 2-62: Position switch for ash box Inputs Measuring orifice Inputs Measuring orifice Offset

5,000 kg / 3 years 29 2.6.11 Attaching panels Installing the side panels Remount the side panels. Fig. 2-63: Side panel Reinstall the protective screen. Fig. 2-64: Protective screen Mounting the panel on the front Suspend the panel on the boiler and secure it with the screws. Fig. 2-65: Panel Mounting the top panel Remount the panel on the top of the boiler again. Fig. 2-66: Panel

Cleaning and maintenance 2.6.12 Calibrate lambda probe Calibrating the lambda probe The boiler's built-in lambda probe checks the residual oxygen content of the flue gas and uses it to control the combustion. To ensure reliability, the control system autonomously performs an automatic calibration after every 500 hours of operation. If you wish to perform an additional lambda probe cal- ibration, the control system features the [Addl. calibra- tion] function. This function can be selected with the [Service] access level and can be found under: Switch on this function and the additional calibration will now start. If the boiler is heating, it is automatically stopped first. De-ashing begins, then the boiler is purged with fresh air. After this, the residual oxygen content is measured and the lambda probe is automat- ically calibrated. Altogether, these steps last approxi- mately 45 minutes. When the calibration is complete, the boiler goes back into operation and starts heating, if necessary. After another 100 hours of operation, the control system automatically performs another calibra- tion. 2.6.13 Establish operational readiness Reset maintenance counter [Consump. since maint.] When maintenance is complete, reset the counter. With the [Service] access level, it will be visible in the boiler text menu under: Perform heating test To perform the heating test, put the log boiler into emissions measurement mode. To do this, carry out the following steps. Place logs in the fuel chamber, ignite them and wait 15 minutes. In the log boiler overview window, press the [Measurement] button in order to enter the emissions measurement settings window. Fig. 2-67: Settings window for emissions measurement Press the [Start now] button so the boiler will start immediately. The control system ensures that sufficient heat is channelled to the buffer, the heating circuits and the hot water tank. After around 10 minutes, a residual oxygen value of 4.5% to 7% should be reached. The current residual oxygen content is displayed in the boiler's text menu under: If the value does not drop below 12% residual oxygen, the boiler is receiving leak air. The reason (leaky boiler doors, heat exchanger cover, lambda probe installation etc.) must be identified and corrected. Inputs Residual O2 Addl. calibration Counters Consump. since maint. Reset counter? Boiler Residual O2

5,000 kg / 3 years 31 If possible, perform a flue gas measurement during the heating test. After the heating test, switch the boiler back to normal mode. To do this, press the [Deactivate measurement] button in the settings window.

Comments: Tasks Notes Empty the ash box • Empty the ash box • Check the seals Check the pressure of the heating system ______ bar Visual check of the safety valves Chimney • Clean the flue tube • Flush the chimney's condensate drain Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe performed on: _________________________ performed by: _________________________

Comments: Tasks Notes Empty the ash box • Empty the ash box • Check the seals Check the pressure of the heating system ______ bar Visual check of the safety valves Chimney • Clean the flue tube • Flush the chimney's condensate drain Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe performed on: _________________________ performed by: _________________________

Comments: Tasks Notes Empty the ash box • Empty the ash box • Check the seals Check the pressure of the heating system ______ bar Visual check of the safety valves Chimney • Clean the flue tube • Flush the chimney's condensate drain Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe Clean the draught fan Clean the temperature sensor Check the combustion chamber and heat exchanger • Check the firebed button and firebed switch • Check heat exchanger tubes • Check the seal on heat exchanger cover • Dismantle the ignition and clean the ignition tube Check the pellet hopper • Cleaning the fill level sensor • Clean the strainer Check the stoker unit • Checking the stoker drive chain Check de-ashing • Check the de-ashing drive chain Check the underpressure sensor • Clean the silicon hoses • Calibrate the underpressure sensor Check the ash box position switch Calibrate the lambda probe Reset the maintenance counter Perform heating test performed on: _________________________ performed by: _________________________

Comments: Tasks Notes Empty the ash box • Empty the ash box • Check the seals Check the pressure of the heating system ______ bar Visual check of the safety valves Chimney • Clean the flue tube • Flush the chimney's condensate drain Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe performed on: _________________________ performed by: _________________________

Comments: Tasks Notes Empty the ash box • Empty the ash box • Check the seals Check the pressure of the heating system ______ bar Visual check of the safety valves Chimney • Clean the flue tube • Flush the chimney's condensate drain Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe performed on: _________________________ performed by: _________________________

Comments: Tasks Notes Empty the ash box • Empty the ash box • Check the seals Check the pressure of the heating system ______ bar Visual check of the safety valves Chimney • Clean the flue tube • Flush the chimney's condensate drain Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe Clean the draught fan Clean the temperature sensor Check the combustion chamber and heat exchanger • Check the firebed button and firebed switch • Check heat exchanger tubes • Check the seal on heat exchanger cover • Dismantle the ignition and clean the ignition tube Check the pellet hopper • Cleaning the fill level sensor • Clean the strainer Check the stoker unit • Checking the stoker drive chain Check de-ashing • Check the de-ashing drive chain Check the underpressure sensor • Clean the silicon hoses • Calibrate the underpressure sensor Check the ash box position switch Calibrate the lambda probe Reset the maintenance counter Perform heating test performed on: _________________________ performed by: _________________________

Comments: Tasks Notes Empty the ash box • Empty the ash box • Check the seals Check the pressure of the heating system ______ bar Visual check of the safety valves Chimney • Clean the flue tube • Flush the chimney's condensate drain Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe performed on: _________________________ performed by: _________________________

Comments: Tasks Notes Empty the ash box • Empty the ash box • Check the seals Check the pressure of the heating system ______ bar Visual check of the safety valves Chimney • Clean the flue tube • Flush the chimney's condensate drain Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe performed on: _________________________ performed by: _________________________

Comments: Tasks Notes Empty the ash box • Empty the ash box • Check the seals Check the pressure of the heating system ______ bar Visual check of the safety valves Chimney • Clean the flue tube • Flush the chimney's condensate drain Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe Clean the draught fan Clean the temperature sensor Check the combustion chamber and heat exchanger • Check the firebed button and firebed switch • Check heat exchanger tubes • Check the seal on heat exchanger cover • Dismantle the ignition and clean the ignition tube Check the pellet hopper • Cleaning the fill level sensor • Clean the strainer Check the stoker unit • Checking the stoker drive chain Check de-ashing • Check the de-ashing drive chain Check the underpressure sensor • Clean the silicon hoses • Calibrate the underpressure sensor Check the ash box position switch Calibrate the lambda probe Reset the maintenance counter Perform heating test performed on: _________________________ performed by: _________________________

Comments: Tasks Notes Empty the ash box • Empty the ash box • Check the seals Check the pressure of the heating system ______ bar Visual check of the safety valves Chimney • Clean the flue tube • Flush the chimney's condensate drain Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe performed on: _________________________ performed by: _________________________

Comments: Tasks Notes Empty the ash box • Empty the ash box • Check the seals Check the pressure of the heating system ______ bar Visual check of the safety valves Chimney • Clean the flue tube • Flush the chimney's condensate drain Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe performed on: _________________________ performed by: _________________________

Comments: Tasks Notes Empty the ash box • Empty the ash box • Check the seals Check the pressure of the heating system ______ bar Visual check of the safety valves Chimney • Clean the flue tube • Flush the chimney's condensate drain Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe Clean the draught fan Clean the temperature sensor Check the combustion chamber and heat exchanger • Check the firebed button and firebed switch • Check heat exchanger tubes • Check the seal on heat exchanger cover • Dismantle the ignition and clean the ignition tube Check the pellet hopper • Cleaning the fill level sensor • Clean the strainer Check the stoker unit • Checking the stoker drive chain Check de-ashing • Check the de-ashing drive chain Check the underpressure sensor • Clean the silicon hoses • Calibrate the underpressure sensor Check the ash box position switch Calibrate the lambda probe Reset the maintenance counter Perform heating test performed on: _________________________ performed by: _________________________

Comments: Tasks Notes Empty the ash box • Empty the ash box • Check the seals Check the pressure of the heating system ______ bar Visual check of the safety valves Chimney • Clean the flue tube • Flush the chimney's condensate drain Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe performed on: _________________________ performed by: _________________________

Comments: Tasks Notes Empty the ash box • Empty the ash box • Check the seals Check the pressure of the heating system ______ bar Visual check of the safety valves Chimney • Clean the flue tube • Flush the chimney's condensate drain Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe performed on: _________________________ performed by: _________________________

Comments: Tasks Notes Empty the ash box • Empty the ash box • Check the seals Check the pressure of the heating system ______ bar Visual check of the safety valves Chimney • Clean the flue tube • Flush the chimney's condensate drain Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe Clean the draught fan Clean the temperature sensor Check the combustion chamber and heat exchanger • Check the firebed button and firebed switch • Check heat exchanger tubes • Check the seal on heat exchanger cover • Dismantle the ignition and clean the ignition tube Check the pellet hopper • Cleaning the fill level sensor • Clean the strainer Check the stoker unit • Checking the stoker drive chain Check de-ashing • Check the de-ashing drive chain Check the underpressure sensor • Clean the silicon hoses • Calibrate the underpressure sensor Check the ash box position switch Calibrate the lambda probe Reset the maintenance counter Perform heating test performed on: _________________________ performed by: _________________________

Comments: Tasks Notes Empty the ash box • Empty the ash box • Check the seals Check the pressure of the heating system ______ bar Visual check of the safety valves Chimney • Clean the flue tube • Flush the chimney's condensate drain Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe performed on: _________________________ performed by: _________________________

Comments: Tasks Notes Empty the ash box • Empty the ash box • Check the seals Check the pressure of the heating system ______ bar Visual check of the safety valves Chimney • Clean the flue tube • Flush the chimney's condensate drain Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe performed on: _________________________ performed by: _________________________

Comments: Tasks Notes Empty the ash box • Empty the ash box • Check the seals Check the pressure of the heating system ______ bar Visual check of the safety valves Chimney • Clean the flue tube • Flush the chimney's condensate drain Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe Clean the draught fan Clean the temperature sensor Check the combustion chamber and heat exchanger • Check the firebed button and firebed switch • Check heat exchanger tubes • Check the seal on heat exchanger cover • Dismantle the ignition and clean the ignition tube Check the pellet hopper • Cleaning the fill level sensor • Clean the strainer Check the stoker unit • Checking the stoker drive chain Check de-ashing • Check the de-ashing drive chain Check the underpressure sensor • Clean the silicon hoses • Calibrate the underpressure sensor Check the ash box position switch Calibrate the lambda probe Reset the maintenance counter Perform heating test performed on: _________________________ performed by: _________________________

Comments: Tasks Notes Empty the ash box • Empty the ash box • Check the seals Check the pressure of the heating system ______ bar Visual check of the safety valves Chimney • Clean the flue tube • Flush the chimney's condensate drain Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe performed on: _________________________ performed by: _________________________

Comments: Tasks Notes Empty the ash box • Empty the ash box • Check the seals Check the pressure of the heating system ______ bar Visual check of the safety valves Chimney • Clean the flue tube • Flush the chimney's condensate drain Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe performed on: _________________________ performed by: _________________________

Comments: Tasks Notes Empty the ash box • Empty the ash box • Check the seals Check the pressure of the heating system ______ bar Visual check of the safety valves Chimney • Clean the flue tube • Flush the chimney's condensate drain Clean combustion chamber • Clean the inner walls of the combustion chamber • Clean the ignition tube • Checking the movability of the firebed switch • Clean the lambda probe Clean the draught fan Clean the temperature sensor Check the combustion chamber and heat exchanger • Check the firebed button and firebed switch • Check heat exchanger tubes • Check the seal on heat exchanger cover • Dismantle the ignition and clean the ignition tube Check the pellet hopper • Cleaning the fill level sensor • Clean the strainer Check the stoker unit • Checking the stoker drive chain Check de-ashing • Check the de-ashing drive chain Check the underpressure sensor • Clean the silicon hoses • Calibrate the underpressure sensor Check the ash box position switch Calibrate the lambda probe Reset the maintenance counter Perform heating test performed on: _________________________ performed by: _________________________