Vaillant 0010020394 Installation And Maintenance Instructions Manual

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Appendix38 Installation and maintenance instructions ecoFIT sustain 0020230529_02F Inspection and maintenance work – OverviewThe table below lists the manufacturer requirements with respect to minimum inspection and maintenance intervals. If na-tional regulations and directives require shorter inspection and maintenance intervals, you should observe these instead ofthe intervals listed in the table.No. Work Inspection(annual)Mainten-ance(must becarried outat regularintervals)*1Check the air/flue pipe for leak-tightness and to ensure that it is fastened correctly. Make surethat it is not blocked or damaged and has been installed in accordance with the relevant Installa-tion Manual.X X2 Check the general condition of the product. Remove dirt from the product and from the vacuumchamber. X X3Visually inspect the general condition of the heat exchanger. In doing so, pay particular attentionto signs of corrosion, rust and other defects. If you notice any damage, carry out maintenancework.X X4 Check the gas connection pressure at maximum heat input. If the gas connection pressure is notwithin the correct range, carry out maintenance work. X X5 Check the CO₂ content (the air ratio) of the product and, if necessary, adjust it. Keep a record ofthis. X X6 Disconnect the product from the power mains. Check that the electrical plug connections andother connections are seated correctly and correct these if necessary. X X7 Close the gas isolator cock and the service valves. X X8 Drain the product on the water side. Check the admission pressure of the expansion vessel andtop the vessel up if necessary (approx. 0.03 MPa/0.3 bar below the system filling pressure). X9 Remove the gas-air mixture unit. X10 Check the seals in the combustion area. If you see any damage, replace the seals. Replace bothburner seals each time it is opened and accordingly each time maintenance work is carried out. X11 Clean the heat exchanger. X12 Check the burner for damage and replace it if necessary. X13 Check the condensate siphon in the product, clean and fill if necessary. X X14 Install the gas-air mixture unit. Caution: Replace the seals. X15 If the volume of water is insufficient or the outlet temperature is not reached, replace the second-ary heat exchanger if necessary. X16Clean the filter in the cold water inlet. Replace the filter if impurities can no longer be removedor if the filter is damaged. In this case, also check the impeller sensor for dirt and damage, cleanthe sensor (do not use compressed air for this) and replace the sensor if it is damaged.X17 Open the gas isolator cock, reconnect the product to the power mains and switch the product on. X X18 Open the service valves, fill up the product/heating installation to 0.05-0.3 MPa/0.5-3.0 bar (de-pending on the static height of the heating installation) and start purging programme P.XX. X19 Perform a test operation of the product and heating installation, including hot water generation,and purge the system once more if necessary. X X20 Visually inspect the ignition and burner behaviour. X X21 Check the CO₂ content (the air ratio) of the product again. X22 Check the product for gas, flue gas, hot water and condensate leaks, and repair if necessary. X X23 Record the inspection/maintenance work carried out. X X*Note: For those appliances which are not part of an annual service agreement/policy, maintenance must be carried out at least every5 years.