17
Adjustment of the oven
burner minimum
To be effected only for the oven burner
(as the grill burner has an only fixed
input) operating on the thermostat as fol-
lows:
– Light the oven taking the knob to Max.
position.
– remove the knob and by a thin screw-
driver (3 mm section - 100 mm long)
unscrew of about a half turn the screw
by-pass
G
, passing through the front
panel hole (fig. 3.12)
– fit the knob and let the oven heat for
10 minutes, then take the knob to
position 150 allowing the thermostat
to work under by-pass.
– after further removal of the knob, stop
slowly the screw by-pass
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(being
careful not to turn the knob rod) until
the flame reaches 3-4 mm high.
N.B. For LPG the by-pass screw must
be fixed thoroughly.
Lubrication of the
gas taps
If the gas tap becomes stiff, it is neces-
sary to dismount it accurately clean it
with gasoline and spread a bit of special
grease resistant to high temperatures on
it.
The operations must be executed by a
qualified technician.
Flame correct
Flame faulty in
primary air
Flame with excess
primary air
Fig. 3.12
Flame Flame
Flame
faulty in
correct
with excess
primary air
primary air
long, yellow
clear
short and sharp
and
interior blue
too blue interior
trembling
cone
cone tending to
detach
CAUSE
air regulating
correct
air regulating
tube, too
distance of
tube, too
closed
the tube
open
G
