Lamtec F200K Series, Руководство пользователя

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7 Instructions on Commissioning and Maintenance
7.2.4.5 Start-up Suppression
If during the burner start there are short pulses within the detection range, due to background
radiation or adjacent burners, the start-up suppression function can be used to eliminate de-
tection.
The start-up suppression function allows suppression short pulse rates, which may occur on
burner start in connection with the fan operation (pre-ventilation) and background fire. The val-
ues can be set between 0 and 100 % at a continuous start-up delay of 1s, i.e short pulse rates,
which may cause ‘parasitic light detection‘ but no permanent flame signal during the burner
start phase, are ignored (suppressed) with different weighting.When 0% has been set, the
flame detector is activated even on inadequate flame signals, at a setting of 100% however,
an activation requires very proper and stable flame signals.
In case of inadequate starting flames, an excessive start-up suppression impedes a timely
recognition of the flame.
The devices are delivered with start-up suppression factory set to 50 % and the
Serv. switch
preset to the ON position (deactivated).
Carry out resetting according to the requirements as follows:
(see the representation of the operational controls in section
9.1 Layout of the Operational
Controls )
– Set the Serv. switch to the OFF position, this allows pulses to be made visible during the
start-up time via the devices' intensity indicator
– Set the start-up suppression (see chapter 9.1 Layout of the Operational Controls ) accord-
ing to the amplitude of the pulse rates between 0 and 100 %
After completion of the settings and/or optimisation, reset the Serv. switch to the ON position.
CAUTION!
This setting operation should only be used if the alignment of the flame sensor, as well as sen-
sitivity and frequency settings as to reliability have fully been used.