Bartscher 285.102 Mode D'emploi page 80

Checking pilot burner
Check the flame of the pilot burner: it must be neither too short nor too high, but it has to lap the
thermocouple and have a sharp form; otherwise, check the nozzle size 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. It is necessary to carry out the check
observing the values shown in the air regulation column of the burner features tables (pp. 64÷72). In
order to regulate the primary air, proceed as specified in the following paragraphs.
ATTENTION! All the parts protected and sealed by manufacturer can not be regulated by
the installer if not specifically indicated.
REGULATIONS AND SUBSTITUTIONS FOR USING A GAS
DIFFERENT FROM THE TYPE PROVIDED FOR
Functioning with a gas type different from the type provided for
In order to change to another gas type, it is necessary to substitute the nozzles of the main burners
and of the pilot burner, following the instructions in the following paragraphs. The nozzle type to be
installed can be found in tables 2÷11 (pp. 64÷72). The nozzles of the main burner, marked with
their diameter in hundredths, and the nozzles of the pilot burner, marked with a number, are to be
found in a transparent packet attached to the instruction booklet.
When the conversion is completed, check that the pipe joints are tight and that the ignition and
functioning of both the pilot and the main burner – both at minimum and maximum – are correct. It
may be advisable to check the output power.
Then, modify the technical sheet (figg. 17 and 18, p. 10) and place the sheet (provided as standard
kit equipment) referring to the new gas type in the H position.
Open rings
Replacing the burner nozzle (figg. 26, 27 – p. 12)
In order to replace the burner nozzle, remove the pan support grill (1), the gas ring (2), the burner
unit (3) and the drip pan (4). Then, unscrew the nozzle (5) from the nozzle holder (6), which is to be
found under the Venturi tube (7) with a spanner and replace it with the nozzle suitable for the gas
type to be used, as shown in tables 2÷11 (pp. 64÷72). Reassemble the nozzle, tightening it well, and
regulate the primary air, as indicated in the next paragraph. Finally, place back all the components
previously removed.
Regulating the burner primary air (fig. 28 – p. 12)
After replacing the burner nozzle, it is necessary to regulate the primary air. Therefore, unloose the
screw (8) that fixes the steel bushing (9); bring x value to the correct measurement with reference to
tables 2÷11 (pp. 64÷72); tighten up the screw (8) and check the accuracy of x value.
Repacing the by-pass (figg. 29, 30 – p. 12)
In order to replace the by-pass, it is necessary to remove the knobs (1) and the control panel (2).
Then, unscrew the by-pass (3) with a screwdriver and replace it with the by-pass suitable for the gas
type to be used, as shown in tables 2÷11 (pp. 64÷72). Reassemble the by-pass and tighten it well.
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