Via The Temperature In High Temperature; Equipment - Honeywell BCU 460 Technical Information

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..D2 and BCU..D3 feature a
special "High temperature operation" function, see
page 44 (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..D2 (D3) do not evaluate the flame signal.
The safety function of the burner control unit's flame
control is deactivated during this operating phase.
BCU 460, BCU 465 · Edition 03.16l 80