Browning 2B64SDS Sheave 320788-704 it is likely switching 3-phase

it is likely switching 3-phase power or multiple line-voltage legs

This switching relay is built with high-quality silver cadmium oxide contacts to resist arcing and pitting

The patented housing design allows for superior ventilation

features an integrated noise filter that eliminates signal "chatter" caused by high gas flow or low head conditions

A faulty switch may keep the burner from igniting even when the oil is at temperature

Browning 2B64SDS Sheave 320788-704 it is likely switching 3-phaseThe Browning 2B64SDS Sheave is a precision engineered two groove Q D sheave designed for high torque power transmission in industrial HVACR systems. Featuring a 6. 75" outside diameter, this grey cast iron pulley is machined to exacting tolerances to ensure optimal belt drive efficiency and reduced vibration. Engineered for versatility, it is compatible with both A and B series belts, allowing contractors to standardize inventory across various air