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Parameters
10 .2 .2 Flame control
Parameter 04
Parameter 04 = 0: flame control is performed with an
ionization electrode.
Parameter 04 = 1: flame control is performed with a UV
sensor for intermittent operation (UVS).
Parameter 04 = 2: flame control is performed with a UV
sensor for continuous operation (UVD).
Parameter 04 = 3: burner 1 flame control is performed
with an ionization electrode. Burner 2 flame control
is performed with a UV sensor for intermittent opera-
tion (UVS).
Parameter 04 = 4: burner 1 flame control is performed
with an ionization electrode. Burner 2 flame control
is performed with a UV sensor for continuous opera-
tion (UVD).
Parameter 04 = 5: burner 1 flame control is performed
with a UV sensor for intermittent operation (UVS).
Burner 2 flame control is performed with an ionization
electrode.
Parameter 04 = 6: burner 1 and burner 2 flame control
is performed with a UV sensor for intermittent opera-
tion (UVS) on each burner.
Parameter 04 = 7: burner 1 flame control is performed
with a UV sensor for continuous operation (UVD).
Burner 2 flame control is performed with an ionization
electrode.
BCU 580 · Edition 11.15l
Parameter 04 = 8: burner 1 flame control is performed
with a UV sensor for continuous operation (UVD). Burn-
er 2 flame control is performed with a UV sensor for
intermittent operation (UVS).
UV sensor for intermittent operation
For intermittent operation, the operating state of the
complete system is limited to 24 h pursuant to EN 298.
To meet the requirement for intermittent operation, the
burner is shut down and restarted automatically after
an operating time of 24 hours. The restart does not
meet the requirements of EN 298 for UV sensor con-
tinuous operation because the required self-test (at
least once per hour) is not performed while the burner is
operating.
This shut-down and subsequent restart are performed
in the same way as a normal controlled shut-down. This
process is controlled independently by the BCU and
therefore it must be checked whether the industrial
process permits the pause in heat supply it creates.
UV sensor for continuous operation
The reaction times of the BCU and UV sensor for con-
tinuous operation are coordinated so that the set safety
time during operation (parameter 19) is not extended.
59
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