Bartscher 70 Serie Instalación Uso Y Mantenimiento página 49

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 (pag.41, 42, 43). 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 TO THE TYPE PROVIDED FOR
Functioning with different gas to 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 tables 2, 3, 4, 5, 6, 7 (pag. 41, 42, 43). The nozzles for the main burner,
marked with the relative diameter in hundredths, 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 the pilot burner and main burner, at both minimum and maximum, are
correct. It may be necessary to check the output (power).
Substituting the burner nozzle (fig.13 – pag.6)
To substitute the burner nozzle, open the compartment door and unscrew the nozzle (1) from the
nozzle holder (2), and open it completely, unscrew the nozzle (3) with a spanner and substitute it
with the nozzle suitable for the type of gas to be used, shown in tables 2, 3, 4, 5, 6, 7 (pag. 41, 42,
43). Put back the nozzle, tightening it well and proceed to regulate the primary air, as indicated in
the next paragraph.
Regulating the primary air of the burner (fig. 14 – pag.6)
After having substituted the burner nozzle, it is necessary to proceed by regulating the primary air:
loosen the screw (1), bring value "x" to the correct measurement, referring to tables 2, 3, 4, 5, 6, 7
(pag. 41, 42, 23), tighten the screw (1) and check the accuracy of value "x".
Substituting the pilot burner nozzle (fig. 14 – pag.6)
To substitute the pilot burner nozzle, open the compartment door and remove the control panel.
Unscrew the nut, which fixes the thermocouple to the nozzle holder and slide it off; then unscrew
the fitting (1), which fixes the gas supply pipe to the pilot (2) and take out the nozzle (3). Substitute
it with the nozzle suitable for the type of gas to be used, shown in tables 2, 3, 4, 5, 6, 7 (pag. 41, 42,
43). Then proceed to assemble the new nozzle, reposition the pipe and tighten the fitting fully.
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