BCU 560, BCU 565 · Edition 02.16
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Parameters > Flame control
11 .2 .2 Flame control
Parameter 04
Parameter 04 = 0: flame control is performed with an ioniza-
tion electrode.
Parameter 04 = 1: flame control is performed with a UV sen-
sor for intermittent operation (UVS). 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 automati-
cally after a continuous operating time of 24 hours if it is not
operated in compliance with the standard. The restart does
not meet the requirements of EN 298 for UV sensor continu-
ous 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. Depending on the
parameterization, the burner is started with or without pre-
purge. 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.
Parameter 04 = 2: flame control is performed with a UV sensor
for continuous operation (UVD).
The reaction times of the BCU and UV sensor for continuous
operation are coordinated so that the set safety time during
operation (parameter 19) is not extended.
