Accorroni MEC25-85 Technical Information

Accorroni MEC25-85 Technical Information Manual pdf 39 page image

page 35ignition electrode, open the service door on theleft of the appliance.8.8 SECOND BURNER IGNITIONTRANSFORMER (MODEL 85 ONLY)Only model 85, with a second burner, has aspecial ignition transformer, located in thecompartment on the left of the appliance, whichcan be accessed by opening the relative servicedoor.Disconnect the power supply cables and those tothe ignition electrode from the transformer. Removethe transformer by loosening the two self-threadingfastening screws. Insert the new transformer andre-establish the electrical connections respectingthe connections indicated with the special symbols(fig. 37).8.7 ELECTRODESDisconnect the cable connection on the controlequipment. Remove the fastening screws andremove the electrodes from the housing in theburner. Insert the new electrodes, attach thesupports and re-establish the electricalconnection. To check the position of the electrodeson the burner, free the burner from the fitting withthe gas unit, remove the four fastening screws onthe air heater and extract it until the electrodesemerge. The position of the electrodes with respectto the burner must correspond to what is indicatedin the figures 34-35-36.Only model 85 has another ignition electrode onthe second burner, with the same relative position.To access the second burner and the relativeFig. 35ELECTRODE POSITIONINGModels 50 - 57Detection electrodeIgnition electrodeCorrect distancebetween electrodeand burner3mmFig. 36ELECTRODE POSITIONINGModel 853mmCorrect distancebetween electrodeand burnerIgnition electrodeDetection electrode Fig. 38FLUE EXHAUST REPLACEMENTModels 25 - 30 - 35 - 50 - 57DiaphragmScrollMotor-fan unitFig. 37IGNITION TRANSFORMERModel 85 only (second burner)Ignition electrodecableElectricalconnections