Marley Engineered Products 4520-0010-000 Relay For veteran techs

For veteran techs

The aluminum wheel handle is designed for durability and ease of grip

Field adjustments can be made using the bias adjustment screw to shift the output signal

This genuine replacement component is essential for maintaining the factory-specified sequence of operation and ensuring reliable furnace spark ignition during peak demand periods

tool-free installation into standard panel cutouts

Marley Engineered Products 4520-0010-000 Relay For veteran techsThe Marley Engineered Products 4520 0010 000 Relay is a specialized fan delay relay designed for precise thermal management in electric forced air heating systems. Specifically engineered as the F130 20F model, this SPST fan relay protector ensures the blower motor only activates once the heating element reaches 130F, effectively preventing the circulation of cold air during the initial startup phase. Conversely, it maintains fan operation for a