Installation and operating instruction
Oil burner WL40Z-A
3 Product description
83298002 3/2019-11 La
12-112
3.3.3 Electrical components
Combustion Manager
The combustion manager W-FM is the control unit of the burner.
It controls the sequence of operation and monitors the flame.
Operating panel
The values and parameters of the combustion manager can be displayed and
changed at the operating panel.
Burner motor
The burner motor drives the fan wheel and the oil pump.
With variable speed drive, a frequency converter is connected upstream.
Ignition unit
The electronic ignition unit creates a spark at the electrode, which ignites the fuel/
air mixture.
Flame sensor
The combustion manager monitors the flame signal via the flame sensor.
If the flame signal becomes too weak, the combustion manager carries out a con-
trolled shutdown.
3.3.4 Program sequence
The operating phases for commissioning the burner are shown on the display.
Phase
Function
TEST
After the power supply has been switched on the combustion manager performs a self-test.
L
At heat demand, the air damper actuator drives to the reference point.
1
The combustion manager monitors for extraneous light.
2
The air damper actuator drives to pre-purge, to air damper setting stage 2 (operating point P
9
).
3
Ignition and pre-purge is initiated.
4
Pre-purge. The remaining pre-purge time is displayed.
5
The air damper actuator drives to ignition position (operating point P
0
).
6
Waiting time in ignition position.
7
Stage 1 solenoid valve and the safety valve open. The fuel is released. The safety time begins. The dis-
play shows symbol
.
8
Post-ignition time starts, this aids flame stabilisation.
9
The air damper actuator drives to air damper setting stage 1 (operating point P
1
).
10
The burner is in operation. Depending on the regulator demand for stage 2, the stage 2 solenoid valve
opens or closes.
15
If there is no longer a heat demand, the solenoid valves close and stop the fuel supply. Following the
post-purge phase the burner motor switches off. The air damper actuator closes.
OFF
Standby, no heat demand.
