Manufacturer Name: Reznor Product Number: 259521 OEM Part Number: 259521 The Reznor 259521 Time Delay Relay Kit/Sequencer is a specialized control device designed for managing heating and ventilation equipment, particularly in industrial and commercial HVAC systems. This kit provides a time delay relay function that helps to sequence the activation of various components, allowing... https://www.partshnc.com/time-delay-relay-kitsequencer