What is the purpose of a 180-second delay on this relay

this part facilitates consistent spark generation to ignite the fuel-air mixture in residential and commercial heating units

This specific model is certified for a discharge capacity of 697

This #42 drill size orifice is manufactured to strict OEM tolerances

but as a dry case gauge

Williams P200600 Fan Blade What is the purpose ofThe Williams P200600 Fan Blade is a critical replacement component engineered for high performance airflow in specific Williams Furnace wall heaters and air handling units. This 11 inch diameter fan blade features a 5 blade configuration designed to maintain static pressure while minimizing operational noise. The assembly operates with a Clockwise (CW) rotation and is precision bored for a 1 2 inch motor shaft, ensuring a secure fit onto the blower