BCU 580 · Edition 11.15l 12
Application
1.1.4 Modulating-controlled burner
Control:
Main burner continuous
The butterfly valve for air is moved
to the position for minimum capac-
ity in order to start the main burner.
The main burner is started with
minimum capacity after the operat-
ing signal from the pilot burner has
been detected. The control system
controls the burner capacity via the
butterfly valve for air after the oper-
ating state has been signalled. Pilot
and main burners can be operated
simultaneously. This reduces the
time required by the main burner for
starting up.
V1
IC 20 + BVA
BCU 580..C0F1
µC
38371817
1 2 3
FCU 500
Process control (PCC)
46
49
50
P
HT
A
ϑ1
13
14
57
TZI/TGI
9
8
5
VAS
VAS 1
VAG
V2
V4
M
52 53 54 55 56
4
41
42
43
1
2
ϑ2
t
1
2
04 0402–04 06–08 06–08
ϑ1
ϑ2
PLC
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