42-42139-11

Common indicators include a "bulged" or swollen top at the terminals

For veteran technicians servicing industrial heating systems

Reliable Lever Action: Optimized length and geometry provide the necessary mechanical advantage for positive valve closure

Corrosion Resistance: Formulated to resist the corrosive effects of combustion byproducts in the exhaust stream

Berko 410171001 Relay 42-42139-11The Berko 410171001 Relay is a specialized 24V time delay relay engineered for precise sequencing in commercial and industrial heating systems. As an essential Marley Engineered Products replacement part, this component is designed to manage the staggered activation of heating elements, preventing high inrush current and reducing stress on your electrical distribution panel. This HVAC control relay is a direct OEM fit for Berko CUH900 series heaters