Description
The Reznor RZ259521 Relay Time Delay is an electrical timing mechanism that introduces a programmed pause between sequential operations within a heating or cooling control circuit in HVAC systems. It sits between the thermostat signal and key power outputs such as the blower motor or ignition sequence, allowing the system to reach a stable operating state before the next stage activates. This relay prevents simultaneous component startup, reduces electrical surge at the control board, and ensures the heat exchanger reaches adequate temperature before the fan begins pushing air through the supply plenum.
