Incorrect Answer:

If the Effluent Stack Pilots are not burning and the Exhaust System fails, combustible Stack gasses will enter the exhaust ventilation ductwork and present an explosion hazard. During operation Atmosphere gas is not burned in the furnace and the stack exhaust is highly combustible.

Relighting the pilots under these conditions could cause an explosion. The pilots should not be relit until the exhaust fans have been running.



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