11
Officine Gullo
CHECKING PRIMARY AIR IN MAIN BURNERS
All the burners are provided with an air regulator which, by means of a bush, can be regu-
lated and fixed with a screw, enabling the variation of primary air. In the “Burners technical
data” table are the approximate values of parameter “h” (primary air) (see page 3 fig. 3). The
volume flow of primary air must be regulated so that the flame does not tend to come away
from the burner when it is cold or backfire when the burner is hot.
The pilot air is regulated when the appliance is tested and inspected for the gas it is set for.
If you are going to change to a different type of gas, regulate the air by means of the adju-
sting bush until the flame stops sputtering and becomes an intense blue colour.
“BURNERS” TECHNICAL DATA TABLE
Burner max 10 kW- min. 2,3 kW
12,68 kWh/kg
G30
BUTANE
30 mbar
12,87kWh/kg
G31
PROPANE
37 mbar
9,45 kWh/m
3
st.
G20
NATURAL
GAS H
20 mbar
Burner injector 1/100 mm
Min. output adjustment 1/100 mm
Pilot Injector 1/100 mm
Consumption
Primary air h=mm
155
75
20
kg/h 0,788
open
155
75
20
kg/h 0,777
open
230
adjustable
30
m3 st./h 1,058
1
RULES FOR CONVERTING AND INSTALLING OTHER TYPES OF GAS
Our appliances are tested and regulated for liquid gas (see plate inside).
The conversion or adaptation to another type of gas must be carried out by a specialized
technician. The nozzles for the various types of gas are in a packet supplied with the ap-
pliance and are marked in hundredths of mm (see the technical data table).
SUBSTITUTING THE NOZZLE IN OPEN COOKING RINGS
Main nozzles:
Take the rungs off, remove the burners and trays, with a size 12 spanner substitute the nozzles with the
appropriate ones, regulate the primary air (h) (see the “burner” technical data table) unscrewing the
securing screw. Once regulated, tighten the screw, adjust the minimum flame by turning the screw to
the right or left until the thermal power reaches 2.3 kW for the 10 kW burner.
Caution:
If liquid gas is being used the minimum adjustment screw must be locked right down..
