BCU 460, BCU 465 · Edition 11.19 17
Application
The pneumatic ratio control sys-
tem controls the gas pressure on
the burner proportionally to the air
pressure and thus maintains a con-
stant air/gas ratio. At the same time,
it acts as a low air pressure protec-
tion device.
The ignition and monitoring of the
individual burners is ensured by
burner control unit BCU460 with
power module LM..F3.
The centrally checked safety func-
tions such as pre-purge, tightness
test, flow detector and pressure
switch check (gas
min.
, gas
max.
,
air
min.
) are provided by the FCU500.
M
PZL PZH PZ
PZL PDZ
TE
M
BCU 460/
LM..F3
BCU 460/
LM..F3
FCU 500..F0
µC
P
DG DG DG
VAS
VAS
VAS
VCG
VCG
VR..L
VR..L
DG DG
DG
min
DG
max
49 15 131450
45
47 4858
>750°
p
u
/2
ϑ
1
46
2
3
DL
min
DL
Purge
STM
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