BCU 580 · Edition 11.15l 10
Application
1.1.2
Stage-controlled main bu rner with
permanent pilot burner
Control:
Main burner ON/OFF or High/Low
The main burner can be started with
reduced capacity after the operat-
ing signal from the pilot burner has
been detected. Pilot and main burn-
ers can be operated simultaneously.
This reduces the time required by
the main burner for starting up.
The BCU provides the cooling and
purging processes.
BCU 580..C0F3
µC
VAS
VAS 1
VAG
TZI/TGI
VR..L
V1 V2
V4
10
38371817
1 2 3
FCU 500
Process control (PCC)
46
49
50
P
HT
A
ϑ1
9
13
14
57
8
5
4
41
42
43
1
2
ϑ2
t
1
2
04 0402–04 06–08 06–08
ϑ1
ϑ2
PLC
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