MCS XL 9ERM Manuel D'utilisation Et De Maintenance page 24

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Flame control system
Flame control equipment
Figure 18 - Flame control equipment.
The flame control equipment is used to monitor the state of the flame inside the combustion chamber through
a photocell (Fig. 19) that continually reads the flame it gives off. This part is basically the brain of the machine
and takes care of establishing if, first during the ignition phase and then during operation, all the conditions
are respected so that the machine operates without any problem.
The equipment has an integrated ignition transformer that only operates during the machine's initial ignition
phase and does not have internal spare parts.
The operations it carries out are basically the following:
1. It cleans the combustion chamber from any fuel vapour that may have been generated, for example,
from a previous non-ignition during a start-up phase. This operation is carried out with a pre-ventilation
period of approximately ten seconds. During this period the fuel solenoid valve is closed and therefore
there must be no flame. The photocell reads the brightness of the flame, and if this value exceeds the
limit value for the photocell, the heater is blocked and the machine stops working.
N.B.: Sometimes, if the machine is outside and subject to direct sunlight, it may happen that a ray of light
reaches the photocell and therefore causes it to fail the ignition phase. In this case, cover the front part of the
machine or position the heater in a shaded area and repeat the ignition procedure.
2. If instead the photocell notices a complete absence of a flame, the flame control equipment gives
consent to open the fuel solenoid valve. At this point, if stable flame conditions are maintained, the
machine will continue to operate, otherwise the equipment will trip and must be reset manually by
pressing the specific reset button on the control panel.
800 292-3279
Figure 19 - Photocell
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