5862
6
BURNER START-UP CYCLE
Air-purge
: loosen the screw placed on the minimal gas pressure switch mounted on the gas train
.
AIR PRESSURE SWITCH 7) (fig.1)
The air pressure switch setting shall be carried out after having
set all other adjustment of the burner and the air pressure switch
shall be at its lowest set-point.
When the burner is operating, increase the adjustment pressure
by turning - slowly - clockwise the knob till reaching the burner
lock-out.
Thereafter, turn the knob anticlockwise for 1 mbar and repeat the
burner start-up for checking the regularity: if lock-out intervenes
turn the knob anticlockwise for 0.5 mbar.
CAUTION:
do not turn the ionization probe, maintain the drawing position; should it be close to the ignition elec-
trode, damage may occur to the control box amplifier.
Screw
Plug for pressure measure
Pressure switch
S7506
1 … 10
mbar
Adjustment knob
S7507
0 - 1 mm
2 - 4 mm
Probe position
Ignition electrode position
S7508
