Installation and operating instruction
Oil burner WL20/2-C Z
3 Product description
83307702 1/2019-04 La
12-80
3.3.4 Program sequence
Pre-purge
At heat demand, the burner motor starts after the startup waiting time (T
W
) has
elapsed.
The actuator drives to air damper setting Stage 1.
The combustion chamber is pre-purged.
Ignition
Ignition starts with the pre-purge time (T
V
).
Fuel release
Following the pre-purge time (T
V
) stage 1 solenoid valve (K11) opens and releases
the fuel.
Safety time
With fuel release, safety time (T
S
) and post-ignition time (T
NZ
) start.
The flame signal must be present within the safety time (T
S
).
Operation
The burner is in operation.
The combustion manager monitors the flame signal via the flame sensor.
Depending on the regulator demand for stage 2, stage 2 solenoid valve (K13)
opens or closes.
The residence time partial load (T
VK
) prevents cycling between stage 1 and stage 2.
Post-purge
If there is no longer a heat demand, the solenoid valves close and stop the fuel
supply.
Post-purge time (T
N
) begins.
Following the post-purge time (T
N
) the burner motor switches off.
The actuator drives to the Closed position.
