BCU 480 · Edition 03.16l 70
Flame control
7.3 Via the temperature in high temperature
equipment
High temperature equipment is defined as a thermo-
processing installation, in which the wall temperature of
the combustion chamber and/or the processing cham-
ber exceeds 750°C.
Burner control units BCU..D feature a special “High
temperature operation” function, see page 32 (High
temperature operation in the case of BCU..D2 or BCU..
D3).
During heating up, standard monitoring methods (ioni-
zation or UV) must be used for flame control. When
the working temperature has exceeded 750°C, indirect
flame control can be taken over by a central monitoring
device. When the DI input (terminal 6) is activated, the
burner control unit reverts to this operating mode.
Important: in “High temperature operation” (HT opera-
tion), i.e. with the DI input being activated, burner con-
trol units BCU..D do not evaluate the flame signal. The
safety function of the burner control unit’s flame con-
trol is deactivated during this operating phase.
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