Will the exhaust stack diameter cause rapid airflow to blow out the pilot?
I had to have a custom exhaust stack built to fit under an exhaust hood. It tappers from 14x4(bottom) to 12x3.75(top). Pitco Frialator 45C+S will light and heat, but will blow out after 10-15 minutes. Before blow out the pilot light looks like it's getting too much airflow, instead of an up turned flame to heat the thermo, it almost goes straight back.
Kitchen Appliances - Others - Pitco Frialator
Answers & Comments
The output flu should not impact this. What is impacting this is airflow from another source coming into the building. For example if a window is open on the windward side then airflow will rush in and exit through the flu. This could cause the problem. The other thing you should check is the gas pressure on the supply line. An indication that the gas pressure is too high is a gap between the end of the pilot jet and the base of the flame. Another concern is a venturi effect if the area between the hood and the fryer is too small.