Technical information

IFD 244 · Edition 03.08
8
Application > Examples of application
Two-stage-controlled burner1.1.3
Control: High/Low or High/Low/OFF
The burner BIO/BIC starts at low-fire rate. By opening the air
valve, the burner is switched to high fire. An external control
system, e.g. a PLC, can now pulse the air solenoid valve VR..R
in order to control the capacity between high and low fire. In
the event of a flame failure during start-up, an immediate fault
lock-out occurs. Following a flame failure during operation, a
restart is conducted.
IFD 244
5
L1, N, PE
3
µC
BIO/
BIC
VR..R
9
7
8
6
4
GIK..B
VAS
PLC