Mineral calcification from hard water can seize the internal plunger

9 and a forged brass body with a chrome-plated brass ball

activation

it is the direct replacement for 180210-668 models

Resideo RC840T-277 Electromechanical Relay 318423-701 Mineral calcification from hard waterThe Resideo RC840T 277 is a heavy duty electromechanical relay engineered for controlling high voltage loads in demanding HVACR applications. This switching solution features an integrated 24V transformer, making it ideal for interfacing 277 VAC line voltage equipment with low voltage controls. This relay provides reliable on off switching for resistive and inductive loads, specifically optimized for electric heating systems and baseboard units. It is