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20113295
Start-up, calibration and operation of the burner
6.1 Notes on safety for the first start-up
6.2 Combustion adjustment
In conformity with EN 267, the application of the burner on the
boiler, adjustment and testing must be carried out observing the
instruction manual of the boiler, including verification of the CO
and CO2 concentration in the flue gases, their temperatures and
the average temperature of the water in the boiler.
Settings carried out in factory
The values in Tab. G refer to 12.50 of CO
2
, at sea level and with
a temperature of the surroundings and the light oil of 20 °C.
Tab. G
(*) Type-approval adjustment
6.3 Recommended nozzles
The burner complies with the emission requirements of the
EN 267 standard.
In order to guarantee that emissions do not vary, recommended
and/or alternative nozzles specified by manufacturer in the In-
struction and warning booklet should be used.
To set the delivery range within which the nozzle must work, noz-
zle return line fuel pressure must be adjusted.
6 Start-up, calibration and operation of the burner
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.
Check the correct working of the adjustment, com-
mand and safety devices.
The combustion air is sucked from outside, there-
fore, there can be sensitive temperature varia-
tions that can influence the percentage value of
the CO2. It is advisable to adjust the CO2 accord-
ing to the indicated diagram.
e.g. with an external air temperature of 10°C, ad-
just the CO2 to 12.5% (± 0.2%).
External air temperature (°C)
% CO
2
D7052
Fig. 14
Model
Nozzle
Pump
pressure
(+/-0.5)
Burner
output
Combustion
head
adjustment
(*)
(+/-0.5)
Air damper
adjustment
(+/-0.25)
Model GPH Angle bar kg/h ± 4%
mm
(Fig. 18)
Set-point
(Fig. 20)
RDB 2.2 BX 15/21 Danfoss 0.55 80° EH 8.0 1.47 11.5 4.25/B
RDB 2.2 BX 21/27 Danfoss 0.65 80° ES 8.7 1.94 14.5 2.75
RDB 2.2 BX 27/33 Danfoss 0.85 80° ES 8.0 2.45 18 4.75
It is advisable to replace nozzles every year
during regular maintenance operations.
The use of nozzles other than those specified by
manufacturer and inadequate regular mainte-
nance may result into emission limits non-con-
forming to the values set forth by the regulations
in force, and in extremely serious cases, into po-
tential hazards to people and objects.
The manufacturing company shall not be liable for
any such damage arising from non-observance of
the requirements contained in this manual.
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