23
20098582
GB
Start-up, calibration and operation of the burner
6.1
Notes on safety for the first start-up
6.2
Calibrations before firing
The optimum calibration of the burner requires an analysis of the
flue gases at the boiler outlet and interventions on the following
points.
Combustion head setting
The adjustment of the combustion head already carried out on
page 16.
Nozzle
See information on page 14.
Pump adjustment
No presettings are required for the pump, which is set to 12 bar
by the manufacturer. This pressure must be checked and adjust-
ed (if required) after the burner has been ignited.
The only operation required in this phase is the application of a
pressure gauge on the apposite pump attachment indicated on
page 19.
Fan gate adjustment
The adjustment of the fan gate already carried out on page 16.
In summary, the operations and settings that must be performed
prior to firing the burner for the first time are as follows:
–
choice of the nozzle;
–
setting of the combustion head;
The following require no adjustment operations and may remain
as they are provided:
–
pump pressure;
–
setting of the fan's air gate valve
6.3
Burner calibration
6.3.1
Firing
The firing of the burner must generate a noise similar to the noise
generated during operation.
If one or more pulsations or a delay in firing in respect to the
opening of the light oil solenoid valve occur, see the suggestions
provided in "Faults - Probable causes - Solutions” on page 30.
6.3.2
Operation
The optimum calibration of the burner requires an analysis of the
flue gases at the boiler outlet and interventions on the following
points:
Nozzle
See the information listed on page 14.
Pump pressure
12 bar:
this is the pressure calibrated in the factory which is usually suf-
ficient for most purposes. Sometimes, this pressure must be ad-
justed to:
10 bar:
in order to reduce fuel delivery. This adjustment is possible only
if the surrounding temperature remains above 0°C;
14 bar:
in order to increase fuel delivery or to ensure firings even at tem-
peratures of less than 0°C.
In order to adjust pump pressure, use the relevant screw indicat-
ed on page 19.
Fan air gate valve
The adjustment of the fan gate already carried out on page 16.
NOTE
Burner starting and operation phases are indicated on page 24.
6.4
Combustion characteristics
The burner delivery must not exceed the rated delivery for the
boiler, and should be adjusted in relation to the user's effective
heating requirements and selected within the firing rates (see
page 9).
A lower setting of the boiler provides for a lower flue gas fume
temperature, thus increasing combustion efficiency and saving
fuel.
6.4.1
Emissions into the atmosphere
Test boilers (Fig. 4 on page 10):
emissions of Bacharach-CO
2
-CO-CxHy-NOx obtained in labora-
tory tests with our burners proved to be lower than the limits de-
fined by EC Norms EN 267 under the operating conditions
established these standards.
Commercial boilers:
emissions of Bacharach-CO
2
-CO-CxHy-NOx must not exceed
the limits imposed by locally-applicable regulations for burner in-
stallations. In particular, the CO
2
level should not be higher than
13.5% in order to prevent variations in the draught and air tem-
perature or dirty burner conditions from causing polluting com-
bustion.
6
Start-up, calibration and operation of the burner
WARNING
The first start-up of the burner must be carried out
by qualified personnel, as indicated in this manual
and in compliance with the standards and regula-
tions of the laws in force.
WARNING
Check the correct working of the adjustment, com-
mand and safety devices.