Bartscher 900-Serie Bedienungsanleitung Seite 70

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 right ones and that the burners
function properly. If desired, further check the power absorbed by using the "Volumetric Method".
With the help of a cronometer 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 minutes (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 can be
provided by the local gas supply company.
Power
E =
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 table. To regulate the primary air,
proceed as illustrated in the following paragraphs.
ATTENTION! All the parts, protected and sealed by manufacturer may not be regulated by
the installer if not specifically indicated.
REGULATIONS AND SUBSTITUTION FOR USING A
DIFFERENT GAS THAN THE TYPE PROVIDED FOR
Functioning with different gas than the type provided for.
For changing to another type of gas it is necessary to substitute the nozzle in the main burners and
in the pilot burner, following the indications given in the following paragraphs. The type of nozzle
to install can be found in table 2-11-pag.56-63. The nozzles for the main burner, marked with the
relative diameter in hundreths, and the ones for the pilot burner, marked with a number, can be
found in a transparent packet attached to the instruction booklet. When the conversion is completed,
check the tightness of the pipe fittings and also that the ignition and functioning of both pilot burner
and main burner, at both minimum and maximum, are correct. It may be necessary to check the
output (power).
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