Appendix40 Installation and maintenance instructions ecoTEC pro 0020244995_02F Inspection and maintenance workThe 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. Each time inspection and maintenance work is carried out, carry out the required preparatory and com-pletion work.# Maintenance work Interval1 Check the tightness of the air/flue pipe, make sure that it is not damagedand has been attached correctly, and check that it has been set up cor-rectlyAnnually2 Removing dirt from the product and the vacuum chamber Annually3 Visually check the heat cell to ascertain its condition and detect any cor-rosion, rust or damage, and carry out maintenance work, if requiredAnnually4 Checking the gas connection pressure at maximum heat input Annually5 Checking the CO₂ content and, if necessary, adjusting it (air index setting) Annually 226 Recording the CO2 content (the air ratio) Annually7 Check that the connections/electrical plug connections have been con-nected correctly/function correctly (product must be voltage-free)Annually8 Check that the gas stopcock and service valves function correctly Annually9 Checking the condensate trap for dirt and cleaning it Annually10 Checking the pre-charge pressure of the expansion vessel If required, at least every2 years11 Checking the insulating mats in the combustion area and replacing dam-aged insulating matsIf required, at least every2 years12 Cleaning the heat exchanger If required, at least every2 years 2813 Check the burner for damage If required, at least every2 years14 If the water volume is insufficient (domestic hot water) or the outlet tem-perature is insufficient, check the secondary heat exchangerIf required, at least every2 years15 Cleaning the filter in the cold water inlet If required, at least every2 years 2916 Check the impeller sensor for dirt/damage If required, at least every2 years17 Filling the heating installation If required, at least every2 years 1918 Run the test operation on the product/heating installation includingdomestic hot water generation (if available) and, if required, purge theproduct/heating installationAnnually19 Visually check the ignition and burner behaviour Annually20 Re-checking the CO₂ content (the air ratio) If required, at least every2 years21 Check the product for gas, flue gas and water leaks Annually22 Completing inspection and maintenance work Annually 30