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(*These gases belong to II
2HS3B/P
category, which is used only in Hungary)
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 gas power
Normally it is sufficient to check that the nozzles installed are the right ones and that the burners
function properly. If desired, further check the power absorbed by using the "Volumetric Method".
Thanks to 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), by dividing 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 it can be provided
by the local gas supply company.
E = __Power____
Heat capacity
The reading must be done when the appliance is already in function.
Checking 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 sharp form. Otherwise, it is necessary to check the size of the nozzle
depending on the pilot version, as specified in the following paragraphs.
Checking 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. To regulate the primary air,
proceed as shown in the following paragraphs.
ATTENTION! All the parts, protected and sealed by the manufacturer may not be regulated
by the installer if not specifically indicated.
Type of gas
P
n
[mbar]
P
min
[mbar]
P
MAX
[mbar]
G20 (Methane)
20
17
25
G20 (Methane)*
25
20
30
G25 (Methane)
25
20
30
G30 (Butane)
30
20
35
G31 (Propane)
37
25
45
G110/G120 (town gas)
8
6
15
