b'EN COMMISSIONING5 .5 .1Burner startBefore starting the burner, draw oil in until the filter is completely filled. Then start the burner by creating a heat demand on the boiler (refer to boiler installation manual). Open the bleed screw on the oil filter to allow the oil line to bleed fully during the preventilation phase. The negative pressure (vacuum) must not fall below 0.4 bar. Close the bleed screw when the filter is completely filled with oil and oil is flowing out without bubbles. Boiler has to maintain in operation at least 15 min. or reach a steady condition of operation, then check the combustion values.5 .5 .2Burner adjustmentUse the pressure regulator to adjust the oil pressure in accordance with the table (tab.1). Monitor the combustion values continuously as you do so (CO, CO 2 , smoke test). Adjust the airflow gradually if necessary. Operating on air flap setting.5 .6Oil pressure setting5 .6 .1Oil pressure settingThe oil pressure, and therefore burner output, is adjusted using oil pressure regulator (7), see Fig. 34, on the pump.Sequence to adjust the oil pressure: connect a pressure gauge at point (8).Turn the regulator screw (7) to: right: to increase pressure. left: to reduce pressure. verify the correct pressure with the pressure gauge.At the end of adjustment. to disconnect the pressure gauge. to tight the plug (8).5 .6 .2Checking negative pressureThe vacuum gauge for checking negative pressure must be connected to point (4). Maximum permissible negative pressure is 0.4 bar check the oil supply in case those pressures cannot be achieved. At higher negative pressures, the fuel oil gasifies, which causes pump cavitation in the pump and ultimately leads to pump damage.5 .6 .3Cleaning the pump filterTo be able to clean the filter (H), it is necessary to remove the pump cover.Check the pump cover seal and replace the gasket if necessary.HFig. 35 38/64'