Systema EOLO BC RT - Board Operation; Operating Sequences; Start-Up; Burner Shutdown - Combustion Chamber Ventilation

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SYSTEMA EOLO RT rev. 09ENIT04052021
FUNZIONAMENTO
5.2 OPERATING SEQUENCES
Please note
The individual operations for each operating sequence are described below with the infor-
mation and the reference icon present on the display of the command and control board
SCP674V030.
Please note
See paragraphs 5.1.3 and 5.1.4 on pages 61 and 62 for the description of the parameters (Y0, Y1, etc.).
See paragraph 4.1 from page 39 to page 55 for the description of the components (Ts, Mac1, etc.)
5.2.1 Start-up
8.2 BOARD OPERATION
5.2.2 Burner shutdown - combustion chamber ventilation
1) the internal test phase, during this phase the display shows
2) the combustion chamber pre-ventilation cycle for 20 seconds;
3)
the pre-ignition / BOOST cycle for 300 seconds; during this phase the PWM
power depends on parameter Y2,
4)
the ignition phase. The board remains in this state for a maximum of 2 seconds,
until the gas valve warning light comes on; if the gas valve warning light does not
come on, the board will repeat the pre-ignition cycle for 300 seconds at the power
set by parameter Y2.
5)
normal burner operation, in this phase the SCP674V130A1 board, depending on
the value setting of parameter /P or the presence or absence of an SCP674V202
expansion board, maintains:
- the power set in parameter SP or by the potentiometer, terminal J3B, if the
temperature detected by the ventilation probe is lower than Y6 - Y7.
- The minimum value attributable to the PWM output, rL + ro, if the tempera-
ture detected by the ventilation probe is higher than Y6..
- the value passed by the SCP674V202 expansion board connected above
the SCP674V130A1 board whatever the value detected by the ventilation
probe.
During this phase, the display shows the value of the power supplied.
6)
Opening the TA contact causes the burner output to switch o󰀨; when the machine
is switched o󰀨, the display shows the message
When the set point temperature is reached, or when the TA contact is opened, the burner
switches o󰀨.
5 seconds after switching o󰀨, the burner starts combustion chamber post-ventilation, PF,
at this stage the blower output is at 50%. The combustion chamber ventilation lasts for 2
minutes.
When the machine is stopped, the display shows the message