BI Comb SGM.GB

5.4 SPECIAL CALIBRATION FOR THE MODULATINGMODELIn this case, our technicians will perform the calibration operationand train the personnel in charge.5.5 CALIBRATION OF THE AUTOMATIC DRAUGHTRESISTERAt the end of the initial commissioning and drying operations,our technicians will place the draught register in automaticmode, setting it to a value of 0.6-2.0 mbar, according to theboiler and their own judgement.5.6 OPERATING CHECKS ON THE PRESSURISED PARTThe technician performing the tests and inspection will completeall the tests and calibrations, according to the type ofboiler, relating to the:- Thermostats- Pressure switches- Electrical instruments on the control panel and on the boiler- Safety valves- Any registers on the plant suppliedFurthermore, the technician will perform all general checkswhich highlight operating anomalies of any type, interveningon the part supplied and marking, where his knowledgeallows, the parts of the plant supplied by third parties.5.7 CLEANING THE COMBUSTION GRATEThe entire grate must be able to correctly aerate the fuel. Asa consequence, any deposits which may clog it in any waymust be removed. Scrape the base using a suitable tool, avoidingknocks or dents which may cause damage. If the gratesare pressed and stuck together (normally there is a play of2-3 mm), lift them one at a time, starting from the first row.Clean the sides, removing the scale, if necessary using a discgrinder. Similarly, check that air passes freely through theholes of the upper grates, inside the furnace. In the event ofblockages, clean them one by one, using a punch suitable forthe cross-section of the holes. These grates can also beremoved by lifting them from the supports they are slottedonto. The frequency of cleaning depends on the type of dirt,the fuel, and the operating conditions. In any case, cleaningshould be performed at least once every three months, withaccess through the combustion chamber door.20