02/2016 - Art. Nr. 4200 1046 8202A
4
Operation
Operation
Safety function
Heating function
If the system demands heat, the pre-
heater is switched on first.
When the oil preheating temperature is
reached, a thermostat in the pre-heater
activates the program sequence. The
heating time with cold start is
approximately 2 minutes.
Starting the burner
- If heat is requested by the boiler
regulator, the automatic oil
combustion control unit starts the
program sequence.
- The fan motor starts, air pressure is
checked.
- Pre-ventilation
- The pump motor and ignition are on.
- Solenoid valve
6
opens, the pressure
is regulated via the pressure controller
5
.
- Flame formation.
- The ignition is switched off.
Burner mode, control between partial
and full load
The burner is equipped with a nozzle
and operates at two different fuel oil
pressures (partial load and full load).
These pressures are controlled
independently by two regulators fitted in
the pump. If an increase in load is
requested by the boiler regulator, the
burner switches from partial load mode
to full load mode after a delay of
approximately 13 seconds.
- The fan motor
10
reaches the speed
for full load mode.
- If the fan speed (quantity of air) is
adjustable, the solenoid valve
3
closes, the partial load pressure
controller
5
is deactivated and the full
load pressure controller
2
regulates
the pressure.
- The fan motor continues to run at the
maximum load speed, and maximum
load mode is active.
Safety function
A lockout occurs on the device:
- if a flame signal is present during pre-
ventilation (stray light monitoring)
- if, when the burner starts up (fuel
release), no flame is produced after 5
seconds (safety time)
- if no flame is produced in the event of
flame failure during operation after
repeated unsuccessful attempts to run
the program.
A safety shutdown is indicated by the
fault indicator lamp lighting up; the fault
can then be acknowledged by pressing
the reset button after the cause of the
fault has been rectified.
Schematic diagram
1
Two-stage pump
2
Oil pressure regulator, full load
3
Solenoid valve, full load (NO)
4
Pump
5
Oil pressure regulator, partial load
6
Solenoid valve (NC)
7
Nozzle line
8
Burner pipe
9
Flame tube
10
Blower motor
11
Pump motor
12
Oil preheating
