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

Automatic Reset Logic: Eliminates manual resets by restoring the circuit automatically once downstream temperatures stabilize

When installing the Alco 065204

How do I confirm this fits my Reznor heater

this resistor helps prevent welded contactor points and ensures reliable motor starting under varying thermal loads

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