b'EN INSTALLATION4 .3Assembly toolsThe most common and frequent operations on the burner are carried out simply using only the hex key supplied. This key can be used to: remove the burner cover remove the diffuser adjust the electrodes group adjust the fuel pressure adjust the air setting operate on the pump.4 .4Preliminary checks before mounting the burnerBefore mounting the burner onto the boiler: check the distance between tips of electrodes (2 mm)Fig. 10 20/64'