•
The modification must be performed by the qualified gas installer only, according
to the technical data, by replacement of the nozzle in the main burner and
adjustment of the nozzle in the ignition burner.
Replacement of the nozzle in the main burner (fig. 7)
Table 3: Characteristics of nozzles and burners
Rated
Gas
Pressure
power
type
(mbar)
28-30/37
G30
11.5 kW
-31
50/50
G20
13 kW
G25
Low flame
power
3.00 kW
- 42 -
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a) Remove the burner ring (1) .
b) Unscrew the fixing bolt (2) which holds the
c) Dismantle a complete air mixing chamber (3)
d) Release the main burner nozzle from the nozzle
e) Install the removed parts in the reverse order.
Fig. 7
Main
burner
nozzle
Ø (mm)
1.80
1.60
20
3.05
adjustable
20
3.30
adjustable
25
3.15
adjustable
Gas consumption
G30
0.907 kg/h
G31
0.893 kg/h
3
G20
1.376 m
/h
3
G20
1.376 m
/h
3
G25
1.600 m
/h
burner and is accessible from below.
by turning it counterclockwise.
bracket (4) and replace it with the nozzle
designed for the relevant type of gas (data
related to the nozzle are shown in the table 3
"Characteristics of burners and nozzles").
Ignition
Primary
burner
air
chamber
nozzle
H (mm)
Ø (mm)
0.20
12
0.20
12
5
5
5
Secondary
Nozzle
air
bypass
chamber
opened
Ø 0.95
opened
Ø 0.85
closed
adjustable
closed
adjustable
closed
adjustable