PFU 780 · Edition 02.12
8
VAG
VBY
SPS
PLC
CPE
DI
L1, N, PE
2
1
P
DI
BV+IC
mA
PFU 780
10e
2e
4e
2c
4c
6a
6e
26a
26e
10c
TZI
22a
28c
16c
18e
14a
18a
M
2
1
ϑ
1
ϑ
2
µC
Application > Examples of application
1 .1 .3 Modulating-controlled burner
Control: Main burner continuous
The butterfly valve for air BV is moved
to ignition position in order to start the
main burner. The main burner can be
started at low-fire rate 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 BV after the operating state has been
signalled. Pilot and main burners can be
operated simultaneously.