03/2011 - Art. Nr. 4200 1016 4000C
16
Function
Heating function
Operating function
Safety function
Principle diagram
1
Oil burner pump, complete
2
Oil pressure regulator
3
Oil burner pump
4
Solenoid valve
5
Nozzle rod (with heating
on VL1.40/P and VL1.55P)
6
Burner head
7
Baffle plate
8
Linearised air metering drum
10 Blower
11 Burner motor
Heating function
(only on VL1.40/P and VL1.55P)
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.
Operating function
- If heat is requested by the boiler
regulator, the automatic oil
combustion control unit starts the
program sequence.
- The motor starts, the igniter is
switched on and the preventilation
period of 15 seconds commences.
- During the preventilation period, the
furnace is monitored for flame signals.
- At the end of the preventilation period,
the fuel-oil solenoid valve opens and
the burner starts.
- The igniter remains switched off while
the burner is in operation.
Controlled shutdown
- Boiler regulator interrupts heat
request.
- The fuel-oil solenoid valve closes and
the flame is extinguished.
- Burner motor switches off.
- Burner enters standby.
Safety function
A safety shutdown occurs:
- if a flame signal is present during
preventilation (parasitic flame
monitoring)
- if no flame is produced within 5
seconds (safety time) of start-up (fuel
authorisation)
- if no flame is produced after an
unsuccessful restart attempt in the
event of flame failure during
operation.
A safety shutdown is indicated by the
malfunction lamp lighting up and it is
then only possible to reenable the
burner by pressing the reset button after
the cause of the malfunction has been
rectified.
For further information, see the
automatic combustion control unit
description.
