Installation and operating instruction
Oil burner WL40Z-A
12 Project planning
83298002 3/2019-11 La
90-112
12.2 Continuous running fan or post-purge
DANGER
Fire hazard due to failure of the combustion air fan
Failure of the combustion air fan (e.g. due to a power failure or defective motor)
during operation with continuous running fan or increased post-purge may result in
back radiation or hot flue gases flowing back into the burner housing. This could
cause a fire.
If fail-safe continuous ventilation or post-purge is required, take appropriate meas-
ures, such as:
installing compressed air flushing on site with:
sufficiently large compressed air tank,
normally open compressed air valve.
