EVCO EVCLC33DJ2 - Manual (Page 42)

EVCO S.p.A. Vcolor 338 L | Installer manual ver. 2.0 | Code 144VC338LE204
page 42 of 66
15.3 Application scheme
The burner module EVCLE302XXE interacts with electronic ignition control boards for atmospheric burners such as "Honeywell
4565"series (and similar) and with variable speed centrifugal fans with PWM control signal+ feedback (HALL sensor).
15.4 Operation
During the heating phase, the controller will activate the relevant room or boiler heating outputs, as well as the relevant burner, whose
heating power is managed proportionally to the work set point trough the centrifugal fan speed control.
The burner activation procedure is the following:
1. Pre-ventilation phase: the burner speed will rise to the value determined by parameter b2 for the room burner or by
parameter b9 for the boiler burner and it will remain constant for k 10 seconds.
2. Ignition phase: once pre-ventilation time is over, the speed stability is checked through the feedback of the Hall sensor and
the burner control unit is activated by starting the relevant relay (room or boiler heating). The flame will be detected through
the digital input and the heating phase will start.
3. Heating phase: the burner speed will rise to the value required by the regulation to heat the oven.
Such speed is proportional to the difference between the temperature and the work set point inside the proportional band
given by parameter b3 for the room or b10 for the boiler. The speed may vary from a minimum value given by parameter b1
for the room or b8 for the boiler, to a maximum value given by b0 for the room or b7 for the boiler.