09/2005 - Art. Nr. 13 019 533A
5
Burner Functions
Functional Description
Functional Diagram
Starting function
The automatic burner control unit auto-
matically starts the burner when heat is
required by the system.
–
The motor starts, the ignition is
switched on.
–
The air damper drive
6a
switches the
air damper
5
to the low-load position (
in ”Basis” design, the air damper is in
the low-load position when the burner
is idle)
–
Preventilation
–
The solenoid valve
2
opens nozzle 1
–
The flame is formed (low load is in
operation).
Switching over to full load
If required by the system, the automatic
burner control unit switches the burner
to full load.
–
The solenoid valve
3
opens nozzle 2
–
At the same time, the solenoid valve
7
switches from passage
b–c
to
a–b
–
The hydraulic air damper drive
6
switches the air damper
5
to full load
(full load is in operation).
–
The ignition is switched off again
upon activation of full load.
Functional diagram
A Supply oil connection
B Return oil connection
C Combustion air inlet
D
1
Nozzle 1
D
2
Nozzle 2
1
Oil pressure pump with pressure
regulator
2
Solenoid valve for nozzle 1
3
Solenoid valve for nozzle 2
4
Nozzle rod with two nozzles
5
Air damper
6
Hydraulic air damper drive
6a Hydraulic air damper driver for air
cut-off
7
Solenoid valve for air damper drive
8
Combustion air blower
9
Safety solenoid valve (with design
”DIN”)
Safety functions
A
fault shutdown
is effected if:
–
a flame signal occurs during
preventilation (extraneous light moni-
toring)
–
no flame occurs within 5
secondsafter starting the burner
(initial oil release)
–
the flame is extinguished during
operation.
A fault shutdown is indicated by the
flashing lamp in the reset button.
The program timer stops and the
location of the malfunction is indicated
(see Service Instructions, Malfunctions).
After eliminating the malfunction, press
the reset button to start the burner
again.
A
controlled shutdown
is effected if:
–
the medium temperature or pressure
is reached
–
the power supply fails.
The burner starts again automatically
as soon as the operating conditions
have returned to normal.
Basis
CEN/ DIN
