b'MAINTENANCE ENCAUTIONIf the air distributor (1) is removed from its housing, it must be repositioned, making sure that CAUTION the hole (2) is aligned with the pin (3).123Fig. 45 6 .4 .2Diffuser position checkTo check the position of the diffuser: removethecombustionheadasdescribedinparagraph6.4.1Cleaningandreplacing combustion head components on page 48 use the key provided to loosen screw (8) and allow the diffuser position check. One turn of the key is sufficient.8 1XFig. 46 49/64'