Pag. 38/55
Gas Type
P
n
[mbar]
P
min
[mbar]
P
MAX
[mbar]
G25 (Methane)
25
20
30
G20 (Methane)
20
17
25
G30 (Butane)
30
20
35
G31 (Propane)
37
25
45
G110 (Town Gas)
8
6
15
G120 (Town Gas)
8
6
15
If the pressure reading is not within the limits of the table, find out the cause. After solving the
problem, check the pressure again.
Checking the power
Normally, it is sufficient to check that the nozzles installed are the correct ones and that the burners
function properly. If desired, the absorbed power can be further checked by using the "Volumetric
Method". With the help of a chronometer and a counter, it is possible to read the volume of gas
output to the appliance in time units. The right comparison volume [E] can be obtained with the
formula shown overleaf in litres per hour (l/h) or in litres per minute (l/min). Divide the nominal
and minimum outputs (power) shown in the table of burner features for the lowest heat capacity of
the type of gas foreseen for use with the appliance. This value can be found in the norm tables or
can be provided by the local gas Supply Company.
E= Capacity
Calorific Value
The reading must be done when the appliance is already in function.
Checking the pilot burner
Check the flame of the pilot burner, which must be neither too short nor too high but must lap the
thermocouple and have a clear form; otherwise, it is necessary to check the size of the nozzle
depending on the pilot version, as specified in the following paragraphs.
Checking the regulation of primary air
All the main burners are provided with primary air regulation. Checking must be done observing the
values shown in the air regulation column of the burner features tables (pag.30-33). To regulate the
primary air, proceed as illustrated in the following paragraphs.
ATTENTION! All the parts, protected and sealed by the manufacturer may not be regulated
by the installer unless specifically indicated.