Smeg Hob Instructions For The User page 21

Instructions for the installer
10.2 Replacement of nozzles on the cooker hob
Caution: The maximum torque of the screw C should not exceed 1 Nm.
Unscrew screw C and push air regulator D as far as
it will go.
Using a 7-mm wrench, remove nozzle E and replace
it with the appropriate nozzle, following the
instructions in the tables for the type of gas to be
used. The nozzle tightening torque must be no more
than 3 Nm.
Adjust the air by sliding regulator D until distance "X"
from the table in "10.4 Primary air adjustment" is
reached.
Lock regulator D by tightening screw C.
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