Description
The Reznor RZ209164 Fan Sequencer Relay is a time-delay switching part to automate the staged operation of fan circuits and heating elements based on regular signal input. It operates by energizing internal contacts after a preset delay, allowing coordinated activation and shutdown of airflow components to match system heating cycles. This phase shifter manages load sequencing and prevents abrupt electrical transitions during operation. Installed in unit heaters, air handling sections, and control panels in HVAC systems, it operates as a sequencing management element that supports controlled fan timing, smooth system startup, and coordinated electrical control behavior.
