What does the 22/50# rating signify for this pressure switch

it enables versatile circuit logic—common for fan speed changeover or triggering an auxiliary alarm during a high-heat event

plate mounting on 2"x4" or 4"x4" outlet boxes

providing stable resistance values over the life of the burner

What does 'inherently limited' mean for my installation

Heil Quaker ICP 1171426 Motor Pulley What does the 22/50# ratingThe Heil Quaker ICP 1171426 Motor Pulley is a high grade variable pitch sheave designed for precise HVAC blower speed adjustment in commercial and residential fan drive systems. As a genuine ICP OEM replacement part, this cast iron pulley features a robust 1VL40x5 8 configuration, providing a 5 8 inch finished bore with a standard keyway for secure attachment to the blower motor shaft. The 3. 75 inch outside diameter enables contractors to fine tune