BCU 580 · Edition 11.15l 61
Parameters
The precondition for this operating mode is that an
external flame supervision device ensures the pres-
ence of the flame in a fail-safe manner indirectly via the
temperature. For this purpose, we recommend a safety
temperature monitor with double thermocouple (DIN
3440). The flame must be monitored again by conven-
tional means (UV sensor or ionization electrode) in the
event of sensor discontinuity or short-circuit, failure of
the safety temperature monitor or power failure.
Only if the temperature at the furnace wall has ex-
ceeded 750°C may voltage be applied to the HT input
(terminal 49) so as to activate High temperature mode.
t
SA1
t
Z
04 0602 0300
t
t
FS1
t
SA2
07 08
t
FS2
5
13
V1
1
14
V2
2
ϑ1
ϑ2
8
4
88
1
46
11
9
41
42
L1
1
43
2
49
HT
If the temperature in the furnace chamber drops below
750°C, the HT input must be disconnected from the
electrical power supply and the furnace must then be
operated with flame control.
The BCU then responds, depending on setting:
Parameter 06 = 0
The High temperature mode function is switched off.
Flame control takes place dependent on the setting in
parameter 04 (by ionization electrode, UVS sensor or
UVD sensor).
Parameter 06 = 2 (BCU..D1)
06 07 0808
t
t
SA2
t
FS2
5
13
V1
1
14
V2
2
ϑ1
ϑ2
8
4
88
1
46
11
9
41
42
49
t
SA1
t
Z
0402 0301
t
FS1
t
W
L1
HT
The BCU switches off the burner once the HT input has
been disconnected from the electrical power supply
and restarts with flame simulation check (recommend-
ed in the case of UV control with UVS).
To Next Page
Loading...
