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PFA, BGT · Edition 03.11l
5
Application
1 .1 Examples of application
1 .1 .1 PFA 700 with PFU 760, staged On/Off burner
control
DI
L1, N, PE
P
BUS
PFU 760
PFU 760
PFU 760
PFU 760
PFU 760
PFU 760
PFU 760
PFU 760
PFU 760
PF
A 700
BUS
VR..R
VAG
TZI
UV
PLC
The burner can be started with reduced capacity.
A UV sensor monitors the flame signal from the burner.
UV sensor UVD 1 is used for continuous operation, UV
sensor UVS for intermittent operation.
1 .1 .2 PFA 700 with PFU 760L, staged High/Low
burner control
VR..R
TZI
GIK..B
VAS..N
DI
L1, N, PE
P
BUS
PFU 760L
PFU 760L
PFU 760L
PFU 760L
PFU 760L
PFU 760L
PFU 760L
PFU 760L
PFU 760L
PF
A 700
BUS
PLC
The burner starts at low-fire rate. When the operating
state is reached, the PFU 760L advises the control unit.
The PLC can now pulse the air valve in order to control
the burner capacity.