Installation and operating instruction
Gas burner WG20…/1-C LN
12 Project planning
83240802 1/2020-01 La
79-96
12 Project planning
12.1 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.
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