20148107
22
GB
Start-up, calibration and operation of the burner
8.8
Combustion head setting
To adjust the combustion head, proceed as follows:
Loosen the two screws in the ring slots.
Turn the blast tube to regulate it, until the end of the slotted
ring centres up with the notch shown in the Tab. F on
page 20 and Tab. F on page 20.
Turn in a clockwise direction:
in order to increase the volume of air entering the combus-
tion chamber and thus diminishing its pressure. There is a
reduction of CO2 and the adhesion of the flame to the air dif-
fuser disc improves.
(Setting advisable for ignitions at low temperatures).
Turn in an anticlockwise direction:
in order to reduce the volume of air entering the combustion
chamber and thus increasing its pressure. The CO2
improves and the adhesion of the flame to the diffuser tends
to reduce. (This setting is not advisable for ignitions at low
temperatures).
Tighten the two screws.
Fig. 16
Blast tube
Shutter
D4268
Screw
Slotted ring
0
Screw
