12That the water and gas connections are leak-free;That the electrical connection has been performed according to standards.Now the burner can be lit by following instructions for use and these points:Progressive ignition of the burner;even flame;flame security: check these points at both minimum and maximum output.Check flue gas exhaust is not clogged and that they are expelled without any hindrance.The test report must be completed in full and submitted to the customer who should thensign in acceptance. With effect from this moment, the appliance is covered by themanufacturer’s warranty.2.5. CONVERSION TO OTHER TYPES OF GASTo adapt appliance to another gas type, for instance from G20 to G30, it is necessary tocontrol if main burner injectors and by-pass screws have been installed properly; in addition,it is also necessary to replace the oven pilot burner injector (see Table 5 “Technical Data”).All injectors needed for different types of gas are supplied with unit.2.5.1. REPLACEMENT OF INJECTORS FOR MAIN BURNERSTo access injectors, remove water inlet tap knob, control panel and pan-tilting hand wheel.2.5.2. REPLACEMENT OF INJECTORS FOR PILOT BURNERUndo screw (E) and replace injector (D) with appropriate injector (see Table 3).With a size 12 key, undo injector and replace it with injector to suit gas supply (see Table 3).Control the correct distance “H” for primary air (refer to Section 4.6).ATTENTION! After each conversion, the unit must be tested to ensure that there are noleakages and that it operates correctly.2.6. MAINTENANCE OF THE APPLIANCEWarning!: All maintenance operations shall only be performed by a technically qualifiedservice centre!To ensure correct and safe operation, the appliance must be inspected and serviced at leastonce a year only. Maintenance includes components, pipes, feeding pipes etc.It is advisable to replace worn components during maintenance operations to avoid the needfor other maintenance calls and unexpected failures.It is also advisable to apply for a maintenance contract with the customer.